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PI74LPT543 3.3V 8-BIT LATCHED TRANSCEIVER
Product Pin Configuration
LEBA OEBA A0 A1 A2 A3 A4 A5 A6 A7 CEAB GND
Product Pin Description
VCC CEBA B0 B1 B2 B3 B4 B5 B6 B7 LEAB OEAB
1 24 2 23 3 22 4 24-PIN 21 L24 5 20 Q24 6 19 R24 7 18 S24 8 17 9 16 10 15 11 14 12 13
Pin Name OEAB OEBA CEAB CEBA LEAB LEBA A0-A7 B0-B7 GND VCC
Description A-to-B Output Enable Input (Active LOW) B-to-A Output Enable Input (Active LOW) A-to-B Enable Input (Active LOW) B-to-A Enable Input (Active LOW) A-to-B Latch Enable Input (Active LOW) B-to-A Latch Enable Input (Active LOW) A-to-B Data Inputs or B-to-A 3-State Outputs B-to-A Data Inputs or A-to-B 3-State Outputs Ground Power
Truth Table (Non-Inverting)(1,2) For A-to-B (Symmetric with B-to-A)
Inputs LEAB X H X L H Latch Status A-to-B Storing Storing X Transparent Storing Output Buffers B0-B7 High-Z X High Z Current A Inputs Previous* A Inputs
CEAB H X X L L
OEAB X X H L L
Notes: 1. *Before LEAB LOW-to-HIGH Transition H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care or Irrevelant 2. A-to-B data flow shown; B-to-A flow control is the same, except using CEBA, LEBA, and OEBA.
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PI74LPT543 3.3V 8-BIT LATCHED TRANSCEIVER
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................. -55C to +125C Ambient Temperature with Power Applied ............................ -40C to +85C Supply Voltage to Ground Potential (Inputs & Vcc Only) ...... -0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) .. -0.5V to +7.0V DC Input Voltage .................................................................... -0.5V to +7.0V DC Output Current .............................................................................. 120 mA Power Dissipation .................................................................................... 1.0W Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 2.7V to 3.6V)
Parameters VIH VIL IIH IIL IOZH IOZL VIK IODH IODL VOH Description Input HIGH Voltage (Input pins) Input HIGH Voltage (I/O pins) Input LOW Voltage (Input and I/O pins) Input HIGH Current (Input pins) Input HIGH Current (I/O pins) Input LOW Current (Input pins) Input LOW Current (I/O pins) High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Output HIGH Current Output LOW Current Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level Min. 2.2 2.0 -0.5 Typ(2) -- -- -- -- -- -- -- -- -- -0.7 -60 90 -- 3.0 3.0 -- -- 0.2 0.3 -85 -- 150 Max. 5.5 5.5 0.8 1 1 1 1 1 1 -1.2 -110 200 -- -- -- -- 0.2 0.4 0.5 -240 100 -- Units V V V A A A A A A V mA mA V V V V V V mA A mV
VOL
Output LOW Voltage
IOS IOFF VH
Short Circuit Current(4) Power Down Disable Input Hysteresis
VCC = Max. VIN = 5.5V -- VCC = Max. VIN = VCC -- VCC = Max. VIN = GND -- VCC = Max. VIN = GND -- VCC = Max. VOUT = 5.5V -- VCC = Max. VOUT = GND -- VCC = Min., IIN = -18 mA -- VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) -36 (3) VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V 50 VCC = Min. IOH = -0.1 mA Vcc-0.2 VIN = VIH or VIL IOH = -3 mA 2.4 VCC = 3.0V, IOH = -8 mA 2.4(5) VIN = VIH or VIL IOH = -24 mA 2.0 VCC = Min. IOL = 0.1 mA -- VIN = VIH or VIL IOL = 16 mA -- IOL = 24 mA -- VCC = Max.(3), VOUT = GND -60 VCC = 0V, VIN or VOUT 4.5V -- --
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at Vcc = 3.3V, +25C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not tested. 5. VOH = VCC - 0.6V at rated current.
Capacitance (TA = 25C, f = 1 MHz)
Parameters(1) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ. 4.5 5.5 Max. 6 8 Units pF pF
Note: 1. This parameter is determined by device characterization but is not production tested.
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PI74LPT543 3.3V 8-BIT LATCHED TRANSCEIVER
Power Supply Characteristics
Parameters Description ICC ICC ICCD Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply(4) Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., Outputs Open CEAB and OEAB = GND CEBA = VCC One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle CEAB and OEAB = GND CEBA = VCC One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle CEAB and OEAB = GND CEBA = VCC 8 Bits Toggling VIN = GND or VCC VIN = VCC - 0.6V(3) VIN = VCC VIN = GND Min. Typ(2) 0.1 2.0 50 Max. 10 30 75 Units A A A/ MHz
IC
Total Power Supply Current(6)
VIN = VCC - 0.6V VIN = GND
0.6
2.3
mA
VIN = VCC - 0.6V VIN = GND
2.1
4.7(5)
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 3.3V, +25C ambient. 3. Per TTL driven input; all other inputs at Vcc or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested. 6. IC =IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ICC = Power Supply Current for a TTL High Input DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
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Switching Characteristics over Operating Range(1)
LPT543 Com. (3) Min. Max. 2.5 2.5 2.0 8.5 12.5 12.0 LPT543A Com. (3) Min. Max. 2.5 2.5 2.0 6.5 8.0 9.0 LPT543C Com. (3) Min. Max. Units 2.5 2.5 2.0 5.3 7.0 8.0 ns ns ns
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PI74LPT543 3.3V 8-BIT LATCHED TRANSCEIVER
Parameters tPLH tPHL tPLH tPHL tPZH tPZL tPZH tPZL tSU tH tW
Description
Conditions(2)
Propagation Delay Transparent CL = 50 pF Mode AN to BN or BN to AN RL = 500 Propagation Delay LEBA to AN, LEAB to BN Output Enable Time OEBA or OEAB to AN or BN CEBA or CEAB to AN or BN Output Disable Time(3) OEBA or OEAB to AN or BN CEBA or CEAB to AN or BN Setup Time, HIGH or LOW AN or BN to LEBA or LEAB Hold Time, HIGH or LOW AN or BN to LEBA or LEAB LEBA or LEAB Pulse Width LOW(3)
2.0
9.0
2.0
7.5
2.0
6.5
ns
3.0 2.0 5.0
-- -- --
2.0 2.0 5.0
-- -- --
2.0 2.0 5.0
-- -- --
ns ns ns
Notes: 1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V 0.3V, normal range. For Vcc = 2.7V, extended range, all Propagation Delays and Enable/Disable times should be degraded by 20%. 2. See test circuit and wave forms. 3. Minimum limits are guaranteed but not tested on Propagation Delays. 4. This parameter is guaranteed but not production tested. 5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
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PS2062A 01/15/97

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