Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - analogue switches uMAX 10

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General Description

The MAX4584/MAX4585 serial-interface, programmable

switches are ideal for multimedia applications. Each

device contains one normally open (NO) single-pole/

single-throw (SPST) switch and one single-pole/double-

throw (SPDT) switch. The MAX4584/MAX4585 feature

65Ω on-resistance, 4Ω on-resistance matching

between channels, and 5Ω on-resistance flatness.

Additionally, they have off-isolation of -83dB at 20kHz

and -48dB at 10MHz, with crosstalk of -84dB at 20kHz

and -60dB at 10MHz.

The MAX4584 uses a 2-wire I

C™-compatible serial

interface; the MAX4585 uses a 3-wire SPI™/QSPI™/

MICROWIRE™-compatible interface. Both devices are

available in a 10-pin µMAX package and are specified

for the extended-industrial (-40°C to +85°C) temperature

range.

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

Features

♦ +2.7V to +5.5V Single-Supply Operation

♦ SPST and SPDT Switches

♦ 65Ω (max) R

with +5V Supply

♦ Audio Performance

-83dB Off-Isolation at 20kHz

-84dB Crosstalk at 20kHz

♦ Video Performance

-48dB Off-Isolation at 10MHz

-60dB Crosstalk at 10MHz

♦ Serial Interface

2-Wire I

C Compatible (MAX4584)

3-Wire SPI/QSPI/MICROWIRE Compatible

(MAX4585)

MAX4584/MAX4585

Serially Controlled

Audio/Video Switches

________________________________________________________________

Maxim Integrated Products

NO1A

NO1B

COM2

( ) ARE FOR MAX4585 ONLY.

NO2

SCL (SCLK)

V+

SDA (DIN)

A (CS)

COM1

TOP VIEW

GND

MAX4584

MAX4585

µMAX

19-1521; Rev 0; 8/99

PART

MAX4584EUB

MAX4585EUB

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

10 µMAX

Ordering Information

C is a trademark of Philips Corp.

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Pin Configuration/

Functional Diagram

Summary of content (12 pages)

PAGE 1
9-1521; Rev 0; 8/99 Serially Controlled Audio/Video Switches Applications Features ♦ +2.7V to +5.5V Single-Supply Operation ♦ SPST and SPDT Switches ♦ 65Ω (max) RON with +5V Supply ♦ Audio Performance -83dB Off-Isolation at 20kHz -84dB Crosstalk at 20kHz ♦ Video Performance -48dB Off-Isolation at 10MHz -60dB Crosstalk at 10MHz ♦ Serial Interface 2-Wire I2C Compatible (MAX4584) 3-Wire SPI/QSPI/MICROWIRE Compatible (MAX4585) Ordering Information Cellular Phones and Accessories PART TEMP.
PAGE 2
MAX4584/MAX4585 Serially Controlled Audio/Video Switches 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.................
PAGE 3
Serially Controlled Audio/Video Switches (V+ = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VIDEO PERFORMANCE Off-Isolation (Note 7) VISO(V) VA = 1VRMS, fIN = 10MHz, RL = 50Ω, Figure 8 -48 dB Channel-to-Channel Crosstalk VCT(V) VA = 1VRMS, fIN = 10MHz, RS = 50Ω, Figure 8 -60 dB -0.
PAGE 4
MAX4584/MAX4585 Serially Controlled Audio/Video Switches ELECTRICAL CHARACTERISTICS—Single +3V Supply (V+ = +3.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
Serially Controlled Audio/Video Switches MAX4584/MAX4585 I/O INTERFACE CHARACTERISTICS (V+ = +2.7V to +5.25V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP DIGITAL INPUTS (SCLK, DIN, CS, SCL, SDA, A) V+ = 5V Input Low Voltage VIL V+ = 3V Input High Voltage VIH Input Hysteresis VHYST Input Leakage Current ILEAK Input Capacitance MAX 0.8 0.6 V+ = 5V 3 V+ = 3V 2 Digital inputs = 0 or V+ -1 V V 0.2 CIN UNITS 0.
PAGE 6
3-WIRE TIMING CHARACTERISTICS (Figures 3 and 4, V+ = +2.75V to +5.25V, fOP = 2.1MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL Operating Frequency fOP DIN to SCLK Setup tDS CONDITIONS MIN V+ = 2.7V to 5.25V V+ = 4.75V to 5.25V TYP MAX UNITS 2.
PAGE 7
Serially Controlled Audio/Video Switches SUPPLY CURRENT vs. TEMPERATURE 4.6 4.5 4.4 4.3 600 500 1 0 -1 400 tON 300 -2 200 -3 100 tOFF 4.2 4.1 4.0 5 25 45 65 85 105 125 0 2 3 4 2.5 5 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) TURN-ON/TURN-OFF TIMES vs. TEMPERATURE OFF-LEAKAGE CURRENT vs. TEMPERATURE ON-LEAKAGE CURRENT vs. TEMPERATURE ICOM (OFF) AT VCOM = 4.5V VNO = 1.0V 150 INO (OFF) AT VNO = 4.5V VCOM = 1.0V 0.1 100 tOFF INO (OFF) AT VNO = 1.0V VCOM = 4.5V 0.
PAGE 8
Serially Controlled Audio/Video Switches MAX4584/MAX4585 Pin Description PIN MAX4584 MAX4585 NAME FUNCTION Analog Switch SPDT Common Terminal 1 1 COM1 2 — A — 2 CS Chip Select of the 3-Wire Serial Interface LSB+2 of the 2-Wire Serial-Interface Address Field 3 — SDA Data Input of the 2-Wire Serial Interface — 3 DIN Data Input of the 3-Wire Serial Interface 4 4 V+ Supply Voltage 5 — SCL Clock Input of the 2-Wire Serial Interface — 5 SCLK Clock Input of the 3-Wire Serial Inte
PAGE 9
Serially Controlled Audio/Video Switches Table 2. Truth Table COMMAND BIT SWITCH TERMINALS POWER-UP STATE LOGIC 0 OPEN D7 (MSB) X — X 1 CLOSED D6 X — X D5 X — X D4 X — X D3 X — X D2 NO2 to COM2 6, 7 0 (Open) ADDRESS BIT (A) ADDRESS D1 NO1B to COM1 9, 1 1 (Closed) 0 0110 1010 D0 (LSB) NO1A to COM1 10, 1 0 (Open) 1 0110 1110 MAX4584/MAX4585 Table 1. Command-Bit Mapping NO1_ AND NO2 Table 3.
PAGE 10
MAX4584/MAX4585 Serially Controlled Audio/Video Switches 20% CS 20% 70% tCSW tCSH SCLK 20% tDH tCSO tCH tCL tCSS 20% 20% 20% 70% 70% 70% 20% tDS D7 DIN D6 D1 D0 Figure 3. 3-Wire Serial-Interface Timing Diagram Addressable Serial Interface To program several MAX4585s individually using a single µP, connect DIN of each MAX4585 together and control CS on each MAX4585 separately.
PAGE 11
Serially Controlled Audio/Video Switches ACKNOWLEDGE BIT MAX4584 MAX4585 3V tR < 20ns tF < 20ns 50% SCL 0 V+ 10nF VOUT 2-WIRE 0.5V 0 tON V+ COM_ NO_ _ VIN DECODER/ CONTROLLER µP VOUT - 0.5V 0 CL 35pF RL 2 OR 3 VOUT VOUT tOFF 3V CS SERIAL INTERFACE 50% 0 VOUT GND 3-WIRE 0.5 0 tON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VIN [RL / (RL + RON)] VOUT VOUT - 0.5 0 tOFF Figure 5.
PAGE 12
MAX4584/MAX4585 Serially Controlled Audio/Video Switches Test Circuits/Timing Diagrams (continued) MAX4584 MAX4585 V+ ACKNOWLEDGE BIT 10nF ACKNOWLEDGE BIT 3V SCL 0 V+ NO_ COM_ 2-WIRE VOUT VOUT CL 1000pF 2 OR 3 ∆VOUT DECODER/ CONTROLLER µP SERIAL INTERFACE 3V CS GND 3-WIRE ∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = ∆VOUT • CL DIN 0 3V 8-BIT COMMAND 0 ∆VOUT VOUT Figure 7.