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(R)
SP504/505
Evaluation Board Manual
s Easy Evaluation for the SP504 or SP505 Multi-Protocol Transceiver s Probe Points Accessable to Driver and Receiver I/O Pins s DB-25 Serial Port Connector Adheres to EIA-530 Pinout s Interface Mode Select Through On-Board DIP Switches s Driver Inputs Can Be Easily Configured to a TTL DC or AC Input s Convenient Layout of Driver and Receiver Access Pins s Compact 6" X 4" Size
DESCRIPTION... The SP50x Evaluation Board is designed to analyze the SP504 or SP505 multi-protocol transceivers. The evaluation board provides access points to all of the driver and receiver I/O pins so that the user can measure electrical characteristics and waveforms of each signal. The SP50x Evaluation Board also includes a DB-25 serial port connector which is configured to a EIA-530 pinout. This allows easy connections to other DTE or DCE systems as well as network analyzers. The next section describes the SP50x Evaluation Board including configuration instructions for either the SP504 or SP505. A schematic of the board and the PCB layout are also included. Product pinouts, product protocol tables, and DB-25 pinout assignment table are also included for convenience.
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BOARD LAYOUT
I/O Pinouts The SP504/SP505 Evaluation Board has been designed to easily and conveniently provide access to all inputs and outputs to the device under test. Position the board with the DB-25 connector at the top and the DIP switches at the bottom. From this orientation, all driver inputs and outputs are located on the right-hand side of the board while all receiver inputs and outputs are located on the left-hand side of the board. The access pins are arranged in groups of eight pins for each driver and seven pins for each receiver. Starting at the "TxC" driver located at the upper right-hand corner of the board, the first two rows of pins are TT(a). These are the TxC driver output TT(a) connections. There are two probe pins to accomodate loads, multiple test clips, etc. Below the TT(a) pins are two TT(b) pins. The last two pins below the TT(b) pins are ground pins. Located in front of the TT(a), TT(b) and ground pins are two pins marked TxC and TTL. The TxC pin is the input to the TxC driver while the TTL pin is connected to a common bus. This common TTL bus provides a convenient way to connect some or all driver inputs to a common TTL signal. The remaining six drivers are arranged similar to the TxC driver. The receivers are laid out similar to the drivers, but on the opposite side of the board. Starting at the upper left-hand corner of the evaluation board are two pins on the same row marked CS(a). These are the CTS receiver input CS(a) connections. Below the CS(a) pins are two CS(b) pins. Below the CS(b) pins are two ground pins. In front of the six CS(a), CS(b) and ground pins is a single pin marked CTS. This is the TTL output from the CTS receiver. Again, the remaining receivers are similarly laid out.
DIP Switches At the bottom of the evaluation board are two DIP switches. A switch placed in an "up" position configures a logic HIGH while a "down" position configures a logic LOW. The righthand DIP switch is used to configure the driver and receiver mode select for the SP505 device or just the driver mode select for the SP504 device. These four mode select switches are marked TDEC3-TDEC0. The right-hand DIP switch also controls the SCT receiver enable line, SCTEN, and the decoder latch control, LATCH, in the SP505. Please note that logic LOW is off (rocker down) as labeled on the DIP switch, not high or low as labeled on the evaluation board. The left-hand DIP switch is used to configure the SP504 receiver mode select pins RDEC3RDEC0. But internally within the SP505, the receiver and driver mode select lines are grouped together as common select lines DEC3-DEC0 which are identified on the evaluation board as TDEC3-TDEC0 on the right-hand DIP switch. Thus, on the left-hand DIP switch for the SP505 device, the RDEC3-RDEC0 positions are instead used to control the individual driver tri-state controls,/RLEN, /LLEN, /RSEN, /TREN & /SDEN. R13 On the left-center position of the evaluation board, immediately to the left of the SP504 or SP505 device, is a column of resistors. There are eleven resistors required for the SP504 device on the evaluation board. Therefore, there should be one open position marked for resistor R13 only for SP505. If the evaluation board is being used for the SP505, then this position must be fitted with a 500 ohm 1% resistor. This R13 is the pulldown resistor for the /RLEN control line which is a TTL input. The R13 is left open for the SP504 because pin 18 is a TTL output (V35_STAT) on the SP504.
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Fuse At the upper right-hand side of the board, just below the DB-25 connector, is a location for a fuse. There must either be a fuse, a low value resistor (1 to 10 ohms) or a jumper wire installed at this location. A one amp fuse is recommended. V35_STAT As mentioned previously, the SP504 device has a TTL output labled V35_STAT. When the SP504 is configured to V.35 mode, this pin provides a high level TTL output. In all other modes, this pin provides a low level TTL output. The V35_STAT output is used to control FET switches which switch 150 ohm V.35 termination resistors in or out of the SP504 circuit configuration. This feature is labeled on the SP50x Evaluation Board but is not used. The rocker switch for V35_STAT must be in the OFF position (rocker down) when using SP504 board.
have been set to low position (rocker down) to enable the drivers. Once the power is on and the driver inputs receive a signal, the driver outputs can be analyzed with a oscilloscope or digital multi-meter. The mode selection can be performed at any time using the TDEC and RDEC positions on the DIP switches. SP505 This is similar to the SP505 except that the RDEC positions on the left DIP switch are now low-active enable lines for the ST, DTR, RTS, and LL drivers. The V35_STAT is now the lowactive RL driver enable pin.
DRIVER/RECEIVER LOOPBACK
SP504 This example uses the ST driver looped back into the SCT receiver. First, configure the mode select for the desired mode using RDEC3-RDEC0 on the left-hand DIP switch and TDEC3-TDEC0 on the right-hand DIP switch. Connect a jumper wire between an ST(a) pin and an SCT(a) pin. If your mode select is for a differential driver/ receiver, then also connect a jumper wire between an ST(b) pin and an SCT(b) pin. Next, connect a signal generator to the ST pin. The signal generator output must be a TTL-level output at a frequency within the acceptable range of the driver mode under test. Set /STEN to logic low (rocker down) and SCTEN to logic high (rocker up). The driver outputs are connected back to the receiver inputs so that driver input to receiver output delays can be examined. This configuration is similar for the other drivers. SP505 The same approach for the SP504 above can be applied for the SP505. However, the SP505 can be programmed internally for loopback. DEC0 to DEC3 should be configured as "1010", respectively for a single ended loopback. DEC0 to DEC3 should be configured as "1011", respectively for a differential loopback.
USING THE EVALUATION BOARD
On the bottom righ-hand side of the evaluation board are two pins identified as GND and VCC. Connect this GND to the power supply ground. Connect VCC to a +5 volt DC power supply. If possible, limit the supply current to 0.5-1.0 Amp. Do not switch power on when connecting power to the evaluation board. All Drivers Active with Single TTL input SP504 On the right-hand side of the evaluation board, connect jumper wires between all seven driver inputs (TxC, TxD, DTR, RTS, LL, RL, and ST) to each of the corresponding TTL pin on the right hand side. Next, configure the mode selection to the desired mode using TDEC3-TDEC0 on the right-hand DIP switch and RDEC3-RDEC0 on the left-hand DIP switch if the SP504 is used. Connect a system clock or signal generator with a TTL-level output and a frequency within the acceptable range of the driver under test to any of the TTL pins. The common bus will route the signal to each driver with a jumper installed to the TTL bus. Ensure that /STEN and /TTEN enable switches on the left-hand DIP switch
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V.35 MODE
SP504 The SP504 requires 150 ohm V.35 termination resistors to be installed between SD(b) & ground, ST(b) & ground and TT(b) and ground for compliant V.35 operation. Resistors should be 1/4 watt 1% tolerance. Be sure to remove the V.35 termination resistors when using any other mode. SP505 The SP505 contains all necessary V.35 termination resistors internally. Therefore, no external termination resistors are necessary for the SP505 device for compliant V.35 operation.
SP505 The SP505 contains all necessary V.11 termination resistors internally. Therefore, no external termination resistors are necessary for the SP505 device for compliant V.11 operation.
USING THE DB-25 CONNECTOR
The DB-25 connector is configured as a DTE for a EIA-530 pinout. In order to connect to other DCE equipment or network analyzers (i.e. TTC's Fireberd 6000A), the RxC receiver output must loop back into the TxC driver input. The RxD output can also be looped back to the TxD input. If connecting the evaluation board to a microcontroller such as the Motorola MC68360, jumper wires of the driver inputs and receiver outputs must connect to the uC's appropriate pins.
V.11 (RS-422) MODE
SP504 The SP504 may require termination resistors to be installed onto the receiver inputs for clock and data signals. Per the V.11 specification, cable termination is optional but is recommended to reduce signal crosstalk and reflection on the transmission line when operating at higher speeds (over 300kbps). If needed, a 120ohm resistor should be placed between the A and B inputs of the clock and data receivers. Specifically, RD(a) & RD(b), RT(a) & RT(b), and SCT(a) & SCT(b). The resistors should be removed when not operating in a mode using RS-422.
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SP504 Pin Assignments
Pin # Pin Name Pin Function Clock & Data Group 1 14 15 20 22 37 38 42 44 59 61 63 65 70 71 76 77 79 RxD TxD TxC RxC ST RT(a) RT(b) ST(a) ST(b) SD(b) SD(a) TT(a) TT(b) RD(a) RD(b) SCT(a) SCT(b) SCT TTL Output TTL Input TTL Input TTL Output TTL Input Analog Input Analog Input Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Input Analog Input Analog Input Analog Input TTL Output Receive Data RxD receiver. Transmit Data TxD driver. Transmit clock TT driver. Receive clock RxC receiver. Send timing ST driver. Receive timing RxC receiver. Receive timing RxC receiver. Send timing ST driver. Send timing ST driver. Send data TxD driver. Send data TxD driver. Terminal timing TxC driver. Terminal timing TxC driver. Receive data RxD receiver. Receive data RxD receiver. Serial clock transmit SCT receiver. Serial clock transmit SCT receiver. Serial clock transmit SCT receiver. Pin Description
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SP504 Pin Assignments (cont)
Pin # Pin Name Pin Function Control Line Group 13 16 17 18 19 21 24 35 36 39 40 45 47 49 51 52 54 56 58 66 67 68 69 78 80 DTR RTS RL V35_STAT DCD RI LL RR(a) RR(b) IC(a) IC(b) RL(b) RL(a) LL(b) LL(a) RS(b) RS(a) TR(b) TR(a) CS(a) CS(b) DM(a) DM(b) DSR CTS TTL Input TTL Input TTL Input TTL Output TTL Output TTL Output TTL Input Analog Input Analog Input Analog Input Analog Input Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Input Analog Input Analog Input Analog Input TTL Output TTL Output Data terminal ready DTR driver. Ready to send RTS driver. Remote loopback RL driver. Outputs logic high in V.35 mode. Data carrier detect DCD receiver. Ring indicate RI receiver. Local loopback LL driver. Data carrier detect DCD receiver. Data carrier detect DCD receiver. Incoming call RI receiver. Incoming call RI receiver. Remote loopback RL driver. Remote loopback RL driver. Local loopback LL driver. Local loopback LL driver. Ready to send RTS driver. Ready to send RTS driver. Terminal ready DTR driver. Terminal ready DTR driver. Clear to send CTS receiver. Clear to send CTS receiver. Data mode DSR receiver. Data mode DSR receiver. Data set ready DSR receiver. Clear to send CTS receiver. Pin Description
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New SP504/505 Evaluation Board
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SP504 Pin Assignments (cont)
Pin # Pin Name Pin Function Control Registers 2 3 4 5 6 7 9 10 11 12 RDEC0 RDEC1 RDEC2 RDEC3 TTEN SCTEN TDEC3 TDEC2 TDEC1 TDEC0 TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input Receiver mode select line. Receiver mode select line. Receiver mode select line. Receiver mode select line. Enable control TT driver (active low). Enable control SCT receiver (active high). Driver mode select line. Driver mode select line. Driver mode select line. Driver mode select line. Pin Description
Power Supplies Pins 25, 33, 41 48, 55, 62, 73, 74 connect to Vcc +5 volts. Pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75 connect to ground. Pin 27 is Vdd +10 volts. Connect 22uF 16 volt capacitor between pin 27 and Vcc. Pin 32 is Vss -10 volts. Connect 22uF 16 volt capacitor between pin 32 and ground. Pins 26 & 30 are C1+ & C1-. Connect 22uF 16 volt capacitor between pin26 & pin 30. Pins 28 & 31 are C2+ & C2-. Connect 22uF 16 volt capacitor between pin28 & pin 31.
Note: NC pins should be left floating as internal signals may be present. Ensure all Vcc and ground connections are made before operating device.
504/505AppNote/03
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SP505 Pin Assignments
Pin # Pin Name Pin Function Clock & Data Group 1 14 15 20 22 37 38 42 44 59 61 63 65 70 71 76 77 79 RxD TxD TxC RxC ST RT(a) RT(b) ST(a) ST(b) SD(b) SD(a) TT(a) TT(b) RD(a) RD(b) SCT(a) SCT(b) SCT TTL Output TTL Input TTL Input TTL Output TTL Input Analog Input Analog Input Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Input Analog Input Analog Input Analog Input TTL Output Receive Data RxD receiver. Transmit Data TxD driver. Transmit clock TT driver. Receive clock RxC receiver. Send timing ST driver. Receive timing RxC receiver. Receive timing RxC receiver. Send timing ST driver. Send timing ST driver. Send data TxD driver. Send data TxD driver. Terminal timing TxC driver. Terminal timing TxC driver. Receive data RxD receiver. Receive data RxD receiver. Serial clock transmit SCT receiver. Serial clock transmit SCT receiver. Serial clock transmit SCT receiver. Pin Description
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SP505 Pin Assignments (cont)
Pin # Pin Name Pin Function Control Line Group 13 16 17 19 21 24 35 36 39 40 45 47 49 51 52 54 56 58 66 67 68 69 78 80 DTR RTS RL DCD RI LL RR(a) RR(b) IC(a) IC(b) RL(b) RL(a) LL(b) LL(a) RS(b) RS(a) TR(b) TR(a) CS(a) CS(b) DM(a) DM(b) DSR CTS TTL Input TTL Input TTL Input TTL Output TTL Output TTL Input Analog Input Analog Input Analog Input Analog Input Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Output Analog Input Analog Input Analog Input Analog Input TTL Output TTL Output Data terminal ready DTR driver. Ready to send RTS driver. Remote loopback RL driver. Data carrier detect DCD receiver. Ring indicate RI receiver. Local loopback LL driver. Data carrier detect DCD receiver. Data carrier detect DCD receiver. Incoming call RI receiver. Incoming call RI receiver. Remote loopback RL driver. Remote loopback RL driver. Local loopback LL driver. Local loopback LL driver. Ready to send RTS driver. Ready to send RTS driver. Terminal ready DTR driver. Terminal ready DTR driver. Clear to send CTS receiver. Clear to send CTS receiver. Data mode DSR receiver. Data mode DSR receiver. Data set ready DSR receiver. Clear to send CTS receiver. Pin Description
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SP505 Pin Assignments (cont)
Pin # Pin Name Pin Function Control Registers 2 3 4 5 6 7 8 9 10 11 12 18 SDEN TREN RSEN LLEN TTEN SCTEN LATCH TDEC3 TDEC2 TDEC1 TDEC0 RLEN TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input Enable control SD driver (active low). Enable control TR driver (active low). Enable control TR driver (active low). Enable control LL driver (active low). Enable control TT driver (active low). Enable control SCT receiver (active high). Latch control logic high is transparent. Receiver & Driver mode select line. Receiver & Driver mode select line. Receiver & Driver mode select line. Receiver & Driver mode select line. Enable control RL driver (active low). Pin Description
Power Supplies Pins 25, 33, 41 48, 55, 62, 73, 74 connect to Vcc +5 volts. Pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75 connect to ground. Pin 27 is Vdd +10 volts. Connect 22uF 16 volt capacitor between pin 27 and Vcc. Pin 32 is Vss -10 volts. Connect 22uF 16 volt capacitor between pin 32 and ground. Pins 26 & 30 are C1+ & C1-. Connect 22uF 16 volt capacitor between pin26 & pin 30. Pins 28 & 31 are C2+ & C2-. Connect 22uF 16 volt capacitor between pin28 & pin 31.
Note:
Ensure all Vcc and ground connections are made before operating device.
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SP504 SP505
SP504
pin 2 pin 3 pin 4 pin 5 pin 8 pin 9 pin 10 pin 11 pin 12 pin 18
Pinout Changes
to
/SDEN /TREN /RSEN /LLEN /LATCH DEC3 DEC2 DEC1 DEC0 /RLEN
from
RDEC0 RDEC1 RDEC2 RDEC3 N/C TDEC3 TDEC2 TDEC1 TDEC0 V35_STAT
function
TTL Input TTL Input TTL Input TTL Input N/C TTL Input TTL Input TTL Input TTL Input TTL Output
function
TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input TTL Input
SP505
pin 2 pin 3 pin 4 pin 5 pin 8 pin 9 pin 10 pin 11 pin 12 pin 18
Summary In the SP504, pins 2-5 control the Mode Input Word used to configure the receivers. Pin 8 is No Connection and pin 18 is the V35_STAT status notification output which is often used to control the V.35 150 ohm termination resistor switches. Pins 9-12 are for the driver Mode Input Word. In the SP505, the 4 receiver Mode Input Bits and the 4 driver Mode Input Bits are combined into a single 4 bit Mode Input Word. Pins 2-5 control the ENABLE (active low) function for the drivers TxD, DTR, RTS & LL, respectively. Pin 8 controls the transparent latch /LATCH (active low) function, used to latch in the last Mode Input Word. Pin 18 controls the ENABLE (active low) function for the RL driver. Pins 9-12 control the combined Mode Input Word DEC3, DEC2, DEC1 & DEC0, respectively.
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SP504 Mode Select
Mode
RS- 232 V.35 RS-422 RS-485 RS-449 EIA-530 EIA-530A V.36 TDEC3 L H L L H H H L TDEC2 L H H H H H H H TDEC1 H H L L L L H H TDEC0 RDEC3 RDEC2 L L L H L H H L L H L L H H H L L H H H H H H H RDEC1 RDEC0 H H L L L L H H L L L H L H H L
Tri-State Control
Active Tri-State
STEN
L H
TTEN
L H
SCTEN
L L
Note: For V.35 mode, install 150ohm resistors between pin 44 & gnd, pin 59 & gnd and pin 65 & gnd. DIP switch settings are Rocker Down for "L" and Rocker Up for "H".
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SP505 Mode Select
Mode
RS-232 V.35 RS-422 RS-485 RS-449 EIA-530 EIA-530A V.36 DEC3 L H L L H H H L DEC2 L H H H H H H H DEC1 H H L L L L H H DEC0 L L L H L H H L
Tri-State Control SDEN TREN RSEN RLEN LLEN STEN TTEN SCTEN
Active L L L L L L L H
Tri-State H H H H H H H L
Latch Control LATCH
Transparent H
Latch L
Note:
DIP switch settings are Rocker Down for "L" and Rocker Up for "H".
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EIA-232
Signal Name
Shield Transmitted Data Received Data Request To Send Clear To Send DCE Ready (DSR) DTE Ready (DTR) Signal Ground Recv. Line Sig. Det. (DCD) Trans. Sig. Elemt. Timing Recv. Sig. Elemt. Timing Local Loopback Remote Loopback Ring Indicator Trans. Sig. Elemt. Timing Test Mode -- DTE DCE DTE DCE DCE DTE -- DCE DCE DCE DTE DTE DCE DTE DCE -- BA BB CA CB CC CD AB CF DB DD LL RL CE DA TM 1 2 3 4 5 6 20 7 8 15 17 18 21 22 24 25
EIA-530
-- BA (A) BA (B) BB (A) BB (B) CA (A) CA (B) CB (A) CB (B) CC (A) CC (B) CD (A) CD (B) AB CF (A) CF (B) DB (A) DB (B) DD (A) DD (B) LL RL -- DA (A) DA (B) TM 1 2 14 3 16 4 19 5 13 6 22 20 23 7 8 10 15 12 17 9 18 21 -- 24 11 25
EIA-449
-- SD (A) SD (B) RD (A) RD (B) RS (A) RS (B) CS (A) CS (B) DM (A) DM (B) TR (A) TR (B) SG RR (A) RR (B) ST (A) ST (B) RT (A) RT (B) LL RL -- TT (A) TT (B) TM 1 4 22 6 24 7 25 9 27 11 29 12 30 19 13 31 5 23 8 26 10 14 -- 17 35 18
V.35
-- 103 103 104 104 105 106 107 108 102 109 114 114 115 115 141 140 125 113 113 142 A P S R T C D E H* B F Y AA V X L* N* J* U* W* NN *
X.21
Mnemonic Pin
-- Circuit T(A) Circuit T(B) Circuit R(A) Circuit R(B) Circuit C(A) Circuit C(B) Circuit I(A) Circuit I(B) 1 2 9 4 11 3 10 5 12
Source Mnemonic Pin Mnemonic Pin Mnemonic Pin Mnemonic Pin
Circuit G
8
Circuit S(A) Circuit S(B) Circuit B(A)** Circuit B(B)**
6 13 7 14
Circuit X(A)** Circuit X(B)**
7 14
* - Optional signals ** - Only one of the two X.21 signals, Circuit B or X, can be implemented and active at one time.
1 14
7 20
13 25
RS-232 & EIA-530 Connector (ISO 2110)
DTE Connector o DB-25 Pin Male DCE Connector o DB-25 Pin Female
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Evaluation Board List of Materials
Component Contact Small Pins 22uF Capacitors 10uF Capacitors Schottky Diode Resistors DIP Switches DB-25 Connector Aluminum Spacers 8x32 Screws Part Number 00-15-01-30-27-04-0 T491C226K016AS T351C106K10AS301 MBRS140T3 RN55D4990F 435640-5 DB25P-FRS (89N1586) Manufacturer Mill-Max Mfg. Corp Kemet Kemet Motorola Dale Amp SPC (Newark Elect.) Generic Generic
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MBRS140T3
22F 22F
+5V
10F
22F
Various VCC pins
27 26
VDD
30
28
31
ITU # #103 #108 #105 #113
(Refer to SP504 VCC Datasheet) Drivers TxD 14
DTR 13 RTS 16 TxC 15 ST 22
32 61 59 58 56 54 52 63 65 42 44 47 45 51 49 70 71 37 38 66 67 68 69 35 36 39 40 76 77
22F
C1+
C1V C2+ C2- SS
DB-25 Connector Pins 2 14 20 23 4 19 24 11 TXD(a) TXD(b) DTR(a) DTR(b) RTS(a) RTS(b) TXCE(a) TXCE(b)
#140 #141
Receivers
RL 17 LL 24 RxD 1 RxC 20 CTS 80 DSR 78 DCD 19 RI 21 SCT 79 SDEN 9 10 11 12 DEC3 DEC2 DEC1 DEC0 TREN RSEN RLEN LLEN STEN TTEN 8 LATCH SCTEN GND
21 18 3 16 17 9 5 13 6 22 8 10 25 15 12
2 3 4 18 5 23 6
RL LL RXD(a) RXD(b) RXC(a) RXC(b) CTS(a) CTS(b) DSR(a) DSR(b) DCD(a) DCD(b) TM SCT(a) SCT(b)
#104 #115 #106 #107 #109 #142
(Applies for DTE only)
#114
SP505CF
DIP Switch +5V all 500
7
DIP Switch +5V all 500
Various GND pins (Refer to SP505 Datasheet)
7
SIGNAL GND
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(c) Copyright 2000 Sipex Corporation
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504/505AppNote/03
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(c) Copyright 2000 Sipex Corporation
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Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. 504/505 AppNote/03 New SP504/505 Evaluation Board (c) Copyright 2000 Sipex Corporation
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