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19-1511; Rev 0; 8/99
Serially Controlled, 4-Channel Audio/Video Multiplexers
General Description
The MAX4586/MAX4587 serial-interface, programmable, 4-to-1 channel multiplexers are ideal for multimedia applications. They feature 65 on-resistance, 4 onresistance matching between channels, and 5 onresistance flatness. Additionally, they feature -83dB off-isolation at 20kHz and -48dB off-isolation at 10MHz, with -84dB crosstalk at 20kHz and -60dB crosstalk at 10MHz. The MAX4586 uses a 2-wire, I2CTM-compatible serial interface; the MAX4587 uses a 3-wire, SPITM/QSPITM/ MICROWIRETM-compatible interface. Both devices are available in 10-pin MAX packages and are specified for the extended -40C to +85C temperature range. o 4-to-1 Channel Multiplexer o 65 (max) RON with +5V Supply o Audio Performance -83dB Off-Isolation at 20kHz -84dB Crosstalk at 20kHz o Video Performance -48dB Off-Isolation at 10MHz -60dB Crosstalk at 10MHz o Serial Interface 2-Wire, I2C Compatible (MAX4586) 3-Wire, SPI/QSPI/MICROWIRE Compatible (MAX4587)
Features
o +2.7V to +5.5V Single-Supply Operation
MAX4586/MAX4587
Applications
Cellular Phones and Accessories Private Mobile Radios (PMRs) PC Multimedia Audio/Video Routing Industrial Equipment Set-Top Boxes Video Conferencing High-End Audio Equipment
PART MAX4586EUB MAX4587EUB
Ordering Information
TEMP. RANGE -40C to +85C -40C to +85C PIN-PACKAGE 10 MAX 10 MAX
Pin Configuration/ Functional Diagram
TOP VIEW
MAX4586 MAX4587
COM 1 A (CS) 2 SDA (DIN) 3 V+ 4 SCL(SCLK) 5 10 NO4 9 8 7 6 NO3 GND NO2 NO1
I2C is a trademark of Philips Corp. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
MAX
( ) ARE FOR MAX4587 ONLY.
________________________________________________________________ Maxim Integrated Products
1
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Serially Controlled, 4-Channel Audio/Video Multiplexers MAX4586/MAX4587
ABSOLUTE MAXIMUM RATINGS
V+ to GND ................................................................-0.3V to +6V COM and NO_ to GND (Note 1)...................-0.3V to (V+ + 0.3V) A, CS, SDA, DIN, SCL, and SCLK to GND...............-0.3V to +6V Continuous Current into Any Terminal..............................20mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle).................................40mA ESD per Method 3015.7.......................................................>2kV Continuous Power Dissipation (TA = +70C) 10-Pin MAX (derate 4.1mW/C above +70C) ..........330mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on NO_ or COM exceeding V+ or ground are clamped by internal diodes. Limit forward-diode current to maximum current rating.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--Single +5V Supply
(V+ = +5V 5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER ANALOG SWITCHES Analog Signal Range (Note 3) VNO_, VCOM RON V+ = 4.75V, VNO_ = 3V, ICOM = 4mA V+ = 4.75V, VNO_ = 3V, ICOM = 4mA V+ = 4.75V; VNO_ = 1V, 2V, 3V; ICOM = 4mA V+ = 5.25V; VNO_ = 1V, 4.5V; VCOM = 4.5V, 1V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -1 -10 -1 -10 -1 -10 0.002 0.001 0.001 2 2 0 45 V+ 65 80 4 5 5 6.5 1 nA 10 1 nA 10 1 nA 10 V SYMBOL CONDITIONS MIN TYP MAX UNITS
On-Resistance
On-Resistance Match Between Channels (Note 4) On-Resistance Flatness (Note 5)
RON
RFLAT
NO_ Off-Leakage Current (Note 6)
INO_(OFF)
COM Off-Leakage Current (Note 6)
V+ = 5.25V; ICOM(OFF) VNO_ = 1V, 4.5V; VCOM = 4.5V, 1V V+ = 5.25V; VNO_ = 1V, 4.5V, or floating; VCOM = 1V, 4.5V
COM On-Leakage Current (Note 6) AUDIO PERFORMANCE Off-Isolation (Note 7) Channel-to-Channel Crosstalk
ICOM(ON)
VISO(A) VCT(A)
VA = 1.0VRMS, fIN = 20kHz, RL = 600, Figure 8 VA = 1.0VRMS, fIN = 20kHz, RS = 600, Figure 8
-83 -84
dB dB
2
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Serially Controlled, 4-Channel Audio/Video Multiplexers
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = +5V 5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER VIDEO PERFORMANCE Off-Isolation (Note 7) Channel-to-Channel Crosstalk -0.1dB Bandwidth -3dB Bandwidth NO_ Off-Capacitance VISO(V) VCT(V) BW BW COFF VA = 1.0VRMS, fIN = 10MHz, RL = 50, Figure 8 VA = 1.0VRMS, fIN = 10MHz, RS = 50, Figure 8 RS = 75, RL = 1k RS = 50, RL = 50 fIN = 1MHz VNO_ = 2.5V, RL = 5k, CL = 35pF TA = +25C TA = TMIN to TMAX 125 10 50 3 2.7 All logic inputs = 0 or V+ 5 5.5 10 -48 -60 5 300 5 275 400 500 200 250 dB dB MHz MHz pF SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4586/MAX4587
DYNAMIC TIMING (Notes 8, 9, and Figure 5) Turn-On Time Turn-Off Time Break-Before-Make Time Charge Injection POWER SUPPLY Power-Supply Voltage Range Supply Current V+ I+ V A tON tOFF tBBM Q ns ns ns pC
TA = +25C VNO_ = 2.5V, RL = 300, CL = 35pF TA = TMIN to TMAX VNO_ = 2.5V, Figure 6 CL = 1.0nF, VS = 0, RS = 0, Figure 7
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3
Serially Controlled, 4-Channel Audio/Video Multiplexers MAX4586/MAX4587
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +3V 10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCHES Analog Signal Range (Note 3) VNO_, VCOM RON V+ = 2.7V, VNO_ = 1V, ICOM = 4mA V+ = 2.7V, VNO_ = 1V, ICOM = 4mA TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 3 3 0 65 V+ 110 130 5 6 10 12 -1 -10 -1 -10 -1 -10 0.002 0.001 0.001 1 nA TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 10 1 nA 10 1 nA 10 V SYMBOL CONDITIONS MIN TYP MAX UNITS
On-Resistance
On-Resistance Match Between Channels (Note 4) On-Resistance Flatness (Note 5)
RON
RFLAT
V+ = 2.7V; TA = +25C VNO_ = 1V, 1.5V, 2V; TA = TMIN to TMAX ICOM = 4mA V+ = 3.6V; VNO_ = 0.5V, 3V; VCOM = 3V, 0.5V V+ = 3.6V; VNO_ = 0.5V, 3V; VCOM = 3V, 0.5V V+ = 3.6V; VNO_ = 0.5V, 3V, or floating; VCOM = 0.5V, 3V TA = +25C
NO_ Off-Leakage Current (Notes 6, 10) COM Off-Leakage Current (Notes 6, 10) COM On-Leakage Current (Notes 6, 10) AUDIO PERFORMANCE Off-Isolation (Note 7) Channel-to-Channel Crosstalk VIDEO PERFORMANCE Off-Isolation (Note 7) Channel-to-Channel Crosstalk -3dB Bandwidth NO_ Off-Capacitance
INO_(OFF)
ICOM(OFF)
ICOM(ON)
VISO(A) VCT(A)
VA = 0.5VRMS, fIN = 20kHz, RL = 600, Figure 8 VA = 0.5VRMS, fIN = 20kHz, RS = 600, Figure 8
-83 -84
dB dB
VISO(V) VCT(V) BW COFF
VA = 0.5VRMS, fIN = 10MHz, RL = 50, Figure 8 VA = 0.5VRMS, fIN = 10MHz, RS = 50, Figure 8 RS = 50, RL = 50 fIN = 1MHz VNO_ = 1.5V, RL = 5k, CL = 35pF TA = +25C TA = TMIN to TMAX
-48 -60 200 5 400 200 10 100 800 1000 350 500
dB dB MHz pF
DYNAMIC TIMING (Notes 8, 9, and Figure 5) Turn-On Time Turn-Off Time Break-Before-Make Time tON tOFF tBBM ns ns ns
TA = +25C VNO_ = 1.5V, RL = 300, CL = 35pF TA = TMIN to TMAX VNO_ = 1.5V, Figure 6
4
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Serially Controlled, 4-Channel Audio/Video Multiplexers
I/O INTERFACE CHARACTERISTICS
(V+ = +2.7V to +5.25V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 0.8 0.6 3 2 0.2 Digital inputs = 0 or V+ f = 1MHz ISINK = 6mA -1 0.01 5 0.4 1 UNITS DIGITAL INPUTS (SCLK, DIN, CS, SCL, SDA, A) V+ = 5V Input Low Voltage VIL V+ = 3V Input High Voltage Input Hysteresis Input Leakage Current Input Capacitance DIGITAL OUTPUT (SDA) Output Low Voltage VOL V VIH VHYST ILEAK CIN V+ = 5V V+ = 3V
MAX4586/MAX4587
V V V A pF
2-WIRE TIMING CHARACTERISTICS
(Figures 1 and 2, V+ = +2.7V to +5.25V, fSCL = 100kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SCL Clock Frequency Bus Free Time Between Stop and Start Condition Hold Time After Start Condition Stop Condition Setup Time Data Hold Time Data Setup Time Clock Low Period Clock High Period SCL/SDA Rise Time (Note 11) SCL/SDA Fall Time (Note 11) SYMBOL fSCL tBUF tHD:STA tSU:STO tHD:DAT tSU:DAT tLOW tHIGH tR tF The first clock is generated after this period. CONDITIONS V+ = 2.7V to 5.25V V+ = 4.75V to 5.25V 4.7 4.0 4.0 0 250 4.7 4.0 20 + 0.1CB 20 + 0.1CB 300 300 MIN 0 TYP MAX 100 400 UNITS kHz s s s s ns s s ns ns
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5
Serially Controlled, 4-Channel Audio/Video Multiplexers MAX4586/MAX4587
3-WIRE TIMING CHARACTERISTICS
(Figures 3 and 4, V+ = +2.7V to +5.25V, fOP = 2.1MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Operating Frequency DIN to SCLK Setup DIN to SCLK Hold CS Fall to SCLK Rise Setup CS Rise to SCLK Hold SCLK Pulse Width Low SCLK Pulse Width High Rise Time (SCLK, DIN, CS) Fall Time (SCLK, DIN, CS) CS Pulse Width High Note 2: Note 3: Note 4: Note 5: SYMBOL fOP tDS tDH tCSS tCSH tCL tCH tR tF tCSW 40 CONDITIONS V+ = 2.7V to 5.25V V+ = 4.75V to 5.25V MIN 0 100 0 100 0 200 200 2 2 TYP MAX 2.1 10 UNITS MHz ns ns ns ns ns ns s s ns
Algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Guaranteed by design. Not subject to production testing. RON = RON(MAX) - RON(MIN). Resistance flatness is defined as the difference between the maximum and minimum on-resistance values, as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum rated temperature and guaranteed by correlation at TA = +25C. Note 7: Off-isolation = 20log (VCOM / VNO_ ), VCOM = output, VNO_ = input to off switch. Note 8: All timing is measured from the clock's falling edge preceding the ACK signal for 2-wire and from the rising edge of CS for 3-wire. Turn-off time is defined at the output of the switch for a 0.5V change, tested with a 300 load to ground. Turn-on time is defined at the output of the switch for a 0.5V change and measured with a 5k load resistor to GND. All timing is shown with respect to 20% V+ and 70% V+, unless otherwise noted. Note 9: Typical values are for MAX4586 devices. Note 10: Leakage testing is guaranteed by testing with a +5.25V supply. Note 11: CB = capacitance of one bus line in pF. Tested with CB = 400pF.
Typical Operating Characteristics
(V+ = +5V, TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM AND SUPPLY VOLTAGE
MAX4586/7-01
ON-RESISTANCE vs. VCOM AND TEMPERATURE (V+ = 5V)
MAX4586/7-02
ON-RESISTANCE vs. VCOM AND TEMPERATURE (V+ = 3.3V)
70 65 60 TA = +25C TA = +85C TA = +125C
MAX4586/7-03
70 V+ = 2.7V 65 60 RON () 55 50 45 40 35 30 V+ = 5.5V V+ = 3.0V V+ = 4.0V
55 50 TA = +125C TA = +85C
75
RON ()
RON ()
V+ = 5.0V
45 TA = +25C 40
55 50 45 TA = -40C TA = -55C
35 TA = -55C 30 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VCOM (V) 0
TA = -40C
40 35 30 0 0.5 1.0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V)
1.5 VCOM (V)
2.0
2.5
3.0
6
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Serially Controlled, 4-Channel Audio/Video Multiplexers
Typical Operating Characteristics (continued)
(V+ = +5V, TA = +25C, unless otherwise noted.)
TURN-ON AND TURN-OFF TIMES vs. SUPPLY VOLTAGE
MAX4586/7-05 MAX4586/7-06
MAX4586/MAX4587
SUPPLY CURRENT vs. TEMPERATURE
4.9 4.8 SUPPLY CURRENT (A) 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4.0 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C) -3 -4 0
MAX4586/7-04
5.0
CHARGE INJECTION vs. VCOM
3 2 CHARGE INJECTION (pC) 1 0 -1 -2 TIME (ns) 700 600 500 400 300 200 100 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V) 2.5
tON
tOFF
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
TURN-ON/TURN-OFF TIMES vs. TEMPERATURE
MAX4586/7-07
ON-LEAKAGE CURRENT vs. TEMPERATURE
MAX4586/7-08A
OFF-LEAKAGE CURRENT vs. TEMPERATURE
ICOM(OFF) @ VCOM = 1.0V VNO = 4.5V 1 CURRENT (nA) INO(OFF) @ VNO = 4.5V VCOM = 1.0V INO(OFF) @ VNO = 1.0V VCOM = 4.5V 0.01 0.001 ICOM(OFF) @ VCOM = 4.5V VNO = 1.0V
MAX4586/7-08B MAX4586/7-11
350 300 250 200 150 100 tOFF 50 0 -55 -35 -15 5 25 45 65
10 ICOM(ON) @ VCOM = 4.5V VNO = FLOATING 1 CURRENT (nA) ICOM(ON) @ VCOM = 1.0V VNO = FLOATING
10
TIME (ns)
tON
0.1
0.1
0.01 0.001 85 105 125 -55 -35 -15 5 25 45 65 85 105 125
-55 -35 -15
5
25
45
65
85 105 125
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
AUDIO FREQUENCY RESPONSE
MAX4586/7-09
VIDEO FREQUENCY RESPONSE
-10 -20 -30 LOSS (dB) -40 -50 -60 -70 -80 -90 100 -100 0.1 1 10 100 50 IN AND OUT tOFF 2V/div CROSSTALK OFF-ISOLATION tON 2V/div INSERTION LOSS
MAX4586/7-10
TURN-ON/TURN-OFF TIMES
0 -10 -20 -30 LOSS (dB) -40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 FREQUENCY (kHz) 10 OFF-ISOLATION CROSSTALK 600 IN AND OUT
0
CLK 5V/div
100ns/div
FREQUENCY (MHz)
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7
Serially Controlled, 4-Channel Audio/Video Multiplexers MAX4586/MAX4587
Pin Description
PIN MAX4586 1 2 -- 3 -- 4 5 -- 6 7 8 9 10 MAX4587 1 -- 2 -- 3 4 -- 5 6 7 8 9 10 NAME COM A CS SDA DIN V+ SCL SCLK NO1 NO2 GND NO3 NO4 FUNCTION Analog Switch Common Terminal LSB + 2 of the 2-Wire Serial-Interface Address Field Chip Select of the 3-Wire Serial Interface Data Input of 2-Wire Serial Interface Data Input of 3-Wire Serial Interface Supply Voltage Clock Input of the 2-Wire Serial Interface Clock Input of the 3-Wire Serial Interface Mux Normally Open Output 1 Mux Normally Open Output 2 Ground Mux Normally Open Output 3 Mux Normally Open Output 4
Detailed Description
The MAX4586/MAX4587 are serial-interface, programmable multiplexers. Each device contains a 4-to-1 normally open (NO) multiplexer. Each switch is independently controlled through the on-chip serial interface. The MAX4586 uses a 2-wire, I2C-compatible serial communications protocol, and the MAX4587 uses a 3-wire, SPI/QSPI/ MICROWIRE-compatible serial communications protocol. These devices operate from a single +2.7V to +5.5V supply and are optimized for use with an audio frequency at 20kHz and video frequencies up to 10MHz. They feature 65 on-resistance, 4 on-resistance matching between channels, and 5 on-resistance flatness. Audio off-isolation is -83dB at 20kHz and crosstalk is at least -84dB at 20kHz, while video off-isolation is -48dB at 10MHz and crosstalk is at least -60dB at 10MHz.
2-Wire Serial Interface
The MAX4586 uses a 2-wire, I 2 C-compatible serial interface. The COM_ register uses the "SendByte" protocol that consists of an address byte followed by a command byte (Table 1). To address a given chip, the A bit in the address byte must duplicate the value present at the A pin of that chip. The rest of the address bits must match those shown in Table 3. The command byte details are described in the Switch Control section. The 2-wire serial interface requires only two I/O lines of a standard microprocessor (P) port. Figures 1 and 2 detail the timing diagram for signals on the 2-wire bus, and Tables 1 and 3 detail the format of the signals. The MAX4586 is a receive-only device and must be controlled by the bus master device. A bus master device communicates by transmitting the address byte of the slave device over the bus and then transmitting the desired information. Each transmission consists of a start condition, an address byte, a command byte, and finally a stop condition. The slave device acknowledges the recognition of its address by pulling the SDA line low for one clock period after the address byte is transmitted. The slave device also issues a similar acknowledgment after the command byte.
Applications Information
Multiplexer Control
The MAX4586/MAX4587 have a common command-bit structure; the only difference between them is the interface type (2-wire or 3-wire, respectively). The command controls the open/closed states of the various switches. Table 1 shows the configuration of the data bits and their related switches. After a command is issued, a logic "1" in any data-bit location closes the associated switch, while a logic "0" opens it (Table 2).
8
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Serially Controlled, 4-Channel Audio/Video Multiplexers
Table 1. Command-Bit Mapping
COMMAND BIT D7 (MSB) D6 D5 D4 D3 D2 D1 D0 (LSB) SWITCH x x x x NO4 to COM NO3 to COM NO2 to COM NO1 to COM 10, 1 9, 1 7, 1 6, 1 TERMINALS POWER-UP STATE x x x x 0 (Open) 0 (Open) 0 (Open) 0 (Open)
Table 2. Truth Table
LOGIC 0 1 NO_ SWITCH OPEN CLOSED
MAX4586/MAX4587
Table 3. Address Bit Map
ADDRESS BIT (A) 0 1 ADDRESS 0110 1010 0110 1110
X = Don't care
SDA
70% 20% tSU, DAT tLOW
70% 20% tSU, STA
70% 20%
70% 20% tBUF tHD, STA tSU, STO
70% 20%
tHD, DAT 70% 20% tHIGH tR tF REPEATED START CONDITION 70% 20% 70% 70%
SCL tHD, STA
70% 20%
70%
START CONDITION
STOP CONDITION
START CONDITION
Figure 1. 2-Wire Serial-Interface Timing Diagram
SLAVE ADDRESS BYTE SDA MSB SCL START CONDITION LSB ACK MSB
COMMAND BYTE
LSB
ACK
STOP CONDITION
Figure 2. Complete 2-Wire Serial-Interface Transmission
Start and Stop Conditions The bus master signals the beginning of a transmission with a start condition by transitioning SDA from high to low while SCL is high. When the bus master has finished communicating with the slave device, it issues a stop condition by transitioning SDA from low to high while SCL is high. The bus master is then free for another transmission.
Slave Address (Address Byte) The MAX4586 uses an 8-bit-long slave address. To select a slave address, connect A to V+ or GND. The MAX4586 has two possible slave addresses, so a maximum of two of these devices may share the same address line. The slave device MAX4586 monitors the serial bus continuously, waiting for a start condition followed by an address byte. When a slave device recog9
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Serially Controlled, 4-Channel Audio/Video Multiplexers MAX4586/MAX4587
CS
20% tCSS tCL 20% tDH tDS 20% tCH 20% 20% 70% 70%
20% tCSH
tCSW
70% tCSO 70%
SCLK
20%
DIN
D7
D6
D1
D0
Figure 3. 3-Wire Serial-Interface Timing Diagram
SWITCHES UPDATED CS
SCLK DATA CLOCKED IN DIN D7 MSB INPUT DATA BITS D6 D5 D4 D3 D2 D1 D0 LSB
of the command byte are "don't care." While shifting data, the device remains in its original configuration. After all eight bits are clocked into the input shift register, a rising edge on CS latches the data into the MAX4587 internal registers, initiating the device's change of state. Figures 3 and 4 detail the 3-wire protocol, and Table 1 details the command byte format.
Addressable Serial Interface
To program several MAX4587s individually using a single processor, connect DIN of each MAX4587 together and control CS on each MAX4587 separately. To select a particular device, drive the corresponding CS low, clock in the 8-bit command, then drive CS high to execute the command. Typically, only one MAX4587 is addressed at a time.
Figure 4. Complete 3-Wire Serial Transmission
nizes its address (01101A10), it acknowledges that it is ready for further communication by pulling the SDA line low for one clock period.
Power-Up State
The MAX4586/MAX4587 feature a preset power-up state. See Table 1 to determine the power-up state of the devices.
3-Wire Serial Interface
The MAX4587 3-wire serial interface is SPI/QSPI/ MICROWIRE compatible. An active-low chip-select (CS) input enables the device to receive data for the serial input (DIN). Data is clocked in on the rising edge of the serial-clock (SCLK) signal. A total of 8 bits is needed in each write cycle. The first bit clocked into the MAX4587 is the command byte's MSB, and the last bit clocked in is the data byte's LSB. The first four bits
___________________Chip Information
TRANSISTOR COUNT: 2259
10
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Serially Controlled, 4-Channel Audio/Video Multiplexers
Test Circuits/Timing Diagrams
ACKNOWLEDGE BIT 3V SCL 0 VOUT 10nF 2-WIRE 0 V+ VNO_ NO_ COM VOUT CL 35pF 3V CS 0 VOUT GND 3-WIRE 0 tON VOUT VOUT - 0.5V tOFF 0.5V 50% VOUT 0 tOFF tON VOUT - 0.5V 0.5V 50% tR < 20ns tF < 20ns
MAX4586/MAX4587
MAX4586 MAX4587
V+
RL 2 OR 3 P DECODER/ CONTROLLER SERIAL INTERFACE
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VNO_ [RL / (RL + RON)]
0
Figure 5. Switching Time
ACKNOWLEDGE BIT 3V SCL 0V VOUT 80% 10nF 2-WIRE V+ NO_ VIN NO_ 2 OR 3 P RL DECODER/ CONTROLLER SERIAL INTERFACE GND 3-WIRE CL COM VOUT CS 3V 50% 0 VOUT 80% 0 tBBM 50% tR < 20ns tF < 20ns
MAX4586 MAX4587
V+
0
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VCOM_ [RL / (RL + RON)]
tBBM
Figure 6. Break-Before-Make Interval
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Serially Controlled, 4-Channel Audio/Video Multiplexers MAX4586/MAX4587
Test Circuits/Timing Diagrams (continued)
V+ ACKNOWLEDGE BIT 3V SCL V+ NO_ COM CL 1000pF 2 OR 3 P DECODER/ CONTROLLER SERIAL INTERFACE GND 3-WIRE CS VOUT 2-WIRE VOUT VOUT 0 ACKNOWLEDGE BIT
MAX4586 MAX4587
10nF
3V 0 3V 0 0 8-BIT COMMAND
DIN
VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE-TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT * CL
VOUT
VOUT
Figure 7. Charge Injection
10nF
V+
MAX4586 MAX4587
10nF
V+
V+ ANALYZER RL SIGNAL GENERATOR 0dBm COM V+ 2/3 DECODER/ CONTROLLER NO_ GND ANALYZER RL SIGNAL GENERATOR 0dBm NO1 2/3 50 GND COM
DECODER/ CONTROLLER NO_
a) OFF-ISOLATION
b) CROSSTALK
Figure 8. Off-Isolation and Crosstalk
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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