Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - analogue switches QSOP 28

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General Description

The MAX4571–MAX4574 serial-interface controlled

switches are ideal for multimedia applications. Each

device features 35Ω max on-resistance, -90dB audio

off-isolation at 20kHz, -60dB video off-isolation at

1.0MHz, and “clickless” mode operation for audio

applications.

The MAX4571/MAX4573 contain eleven SPST switches,

while the MAX4572/MAX4574 contain two SPST switch-

es and six SPDT switches. The MAX4571/MAX4572 fea-

ture a 2-wire, I

C™-compatible serial interface. The

MAX4573/MAX4574 feature a 3-wire, SPI™/QSPI™/

MICROWIRE™-compatible serial interface. All four

parts are available in 28-pin QSOP, SSOP, and wide

SO packages and operate over the commercial and

extended temperature ranges.

Applications

Set-Top Boxes Audio Systems

PC Multimedia Boards Video Conferencing Systems

Features

♦ Selectable Soft Switching Mode for “Clickless”

Audio Operation

♦ 35Ω max On-Resistance

♦ -90dB Audio Off-Isolation at 20kHz

-50dB Video Off-Isolation at 10MHz

♦ -90dB Audio Crosstalk at 20kHz

-52dB Video Crosstalk at 10MHz

♦ Serial Interface

2-Wire, Fast-Mode, I

C-Compatible (MAX4571/72)

3-Wire, SPI/QSPI/MICROWIRE-Compatible

(MAX4573/74)

♦ Single-Supply Operation from +2.7V to +5.25V

MAX4571–MAX4574

Serially Controlled, Clickless

Audio/Video Switches

________________________________________________________________

Maxim Integrated Products

V+

SDA (DOUT)

SCL (DIN)

A1 (SCLK)

A0 (CS)

GND

COM11

( ) ARE FOR MAX4573

NO8

COM8

NO9

COM9

NO10

COM10

NO11

COM7

NO7

COM6

NO6

COM5

NO5

COM4

NO4

COM3

NO3

COM2

NO2

COM1

NO1

QSOP/SSOP/SO

TOP VIEW

MAX4571/MAX4573

19-1404; Rev 1; 4/99

PART

MAX4571CEI

MAX4571CAI

MAX4571CWI 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

28 QSOP

28 SSOP

28 Wide SO

Pin Configurations

Ordering Information

MAX4571EEI -40°C to +85°C 28 QSOP

MAX4571EAI -40°C to +85°C 28 SSOP

MAX4571EWI -40°C to +85°C 28 Wide SO

MAX4572CEI

0°C to +70°C 28 QSOP

MAX4572CAI 0°C to +70°C 28 SSOP

MAX4572CWI 0°C to +70°C 28 Wide SO

MAX4572EEI -40°C to +85°C 28 QSOP

MAX4572EAI -40°C to +85°C 28 SSOP

MAX4572EWI -40°C to +85°C 28 Wide SO

MAX4573CEI

0°C to +70°C 28 QSOP

MAX4573CAI 0°C to +70°C 28 SSOP

MAX4573CWI 0°C to +70°C 28 Wide SO

MAX4573EEI -40°C to +85°C 28 QSOP

MAX4573EAI -40°C to +85°C 28 SSOP

MAX4573EWI -40°C to +85°C 28 Wide SO

MAX4574CEI

0°C to +70°C 28 QSOP

MAX4574CAI 0°C to +70°C 28 SSOP

MAX4574CWI 0°C to +70°C 28 Wide SO

MAX4574EEI -40°C to +85°C 28 QSOP

MAX4574EAI -40°C to +85°C 28 SSOP

MAX4574EWI -40°C to +85°C 28 Wide SO

Pin Configurations continued at end of data sheet.

Summary of content (16 pages)

PAGE 1
9-1404; Rev 1; 4/99 Serially Controlled, Clickless Audio/Video Switches The MAX4571–MAX4574 serial-interface controlled switches are ideal for multimedia applications. Each device features 35Ω max on-resistance, -90dB audio off-isolation at 20kHz, -60dB video off-isolation at 1.0MHz, and “clickless” mode operation for audio applications. The MAX4571/MAX4573 contain eleven SPST switches, while the MAX4572/MAX4574 contain two SPST switches and six SPDT switches.
PAGE 2
MAX4571–MAX4574 Serially Controlled, Clickless Audio/Video Switches ABSOLUTE MAXIMUM RATINGS V+ to GND ................................................................-0.3V to +6V NO_ _, COM_, DOUT to GND (Note 1) ........-0.3V to (V+ + 0.3V) SCL, SDA, CS, SCLK, DIN, A0, A1 to GND..............-0.3V to +6V Continuous Current into Any Terminal..............................±10mA Peak Current (pulsed at 1ms, 10% duty cycle)................±50mA Continuous Power Dissipation (TA = +70°C) QSOP (derate 10.
PAGE 3
Serially Controlled, Clickless Audio/Video Switches PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VIDEO PERFORMANCE Off-Isolation (Note 7) VISO(V) VNO_ _ = 1VRMS, fIN = 1.0MHz, RL = 50Ω, Figure 1 -50 dB Channel-to-Channel Crosstalk VCT(V) VNO_ _ = 1VRMS, fIN = 1.
PAGE 4
MAX4571–MAX4574 Serially Controlled, Clickless Audio/Video Switches ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued) (V+ = +3V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER On-Resistance Flatness (Note 5) SYMBOL RFLAT CONDITIONS ICOM_ = 4mA; V+ = 2.7V; VNO_ _ = 1V, 5V, 2V TA = +25°C MIN MAX 4 10 TA = TMIN to TMAX UNITS Ω 10 NO_ _Off-Leakage Current (Notes 6 and 10) VNO_ _ = 3V, 0.5V; VCOM_ = 0.5V, 3V; V+ = 3.6V TA = +25°C -0.
PAGE 5
Serially Controlled, Clickless Audio/Video Switches PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS (SCLK, DIN, CS, SCL, SDA, A0, A1) Input Low Voltage VIL Input High Voltage VIH Input Hysteresis VHYST Input Leakage Current ILEAK Input Capacitance V+ = 5V 0.8 V+ = 3V 0.6 V+ = 5V 3 V+ = 3V 2 Digital inputs = 0 or V+ -1 V 0.2 CIN V 0.01 V 1 5 µA pF DIGITAL OUTPUTS (DOUT, SDA) Output Low Voltage VOL ISINK = 6mA DOUT Output High Voltage VOH ISOURCE = 0.5mA 0.
PAGE 6
The 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 = +25°C.
PAGE 7
Serially Controlled, Clickless Audio/Video Switches VIDEO FREQUENCY RESPONSE AUDIO FREQUENCY RESPONSE 600Ω IN AND OUT -20 0 MAX4571-4 toc08 0 MAX4571-4 toc07 600Ω IN AND OUT SIGNAL = 1VRMS INSERTION-LOSS -20 0.1 LOSS (dB) LOSS (dB) -40 -60 OFF-ISOLATION -40 CROSSTALK -60 -80 CROSSTALK -80 -100 0.01 1000 10,000 100,000 10 FREQUENCY (Hz) 100 1000 10,000 0.
PAGE 8
MAX4571–MAX4574 Serially Controlled, Clickless Audio/Video Switches Pin Descriptions PIN NAME FUNCTION MAX4571 MAX4572 MAX4571 MAX4572 1, 3, 5, 7, 9, 11, 13, 22, 20, 18, 16 – NO1–NO11 – Normally Open Terminals – 1, 4, 7, 10 – NO1A–NO4A Normally Open Terminals – 3, 6, 9, 12 – NO1B–NO4B Normally Open Terminals – 13, 16 – NO5, NO8 Normally Open Terminals – 22, 19, 20, 17 – NO6A, NO7A, NO6B, NO7B Normally Open Terminals 2, 4, 6, 8, 10, 12, 14, 21, 19, 17, 15 2, 5, 8, 11, 14, 21
PAGE 9
Serially Controlled, Clickless Audio/Video Switches MAX4571 MAX4572 MAX4573 MAX4574 V+ 10nF 2/3 RL RL SIGNAL GENERATOR 0dBm NO_ _ 2/3 DECODER/ CONTROLLER COM2 NO2 GND 50Ω NO1 COM1 ANALYZER DECODER/ CONTROLLER SIGNAL GENERATOR 0dBm MAX4571 MAX4572 MAX4573 MAX4574 V+ COM_V+ ANALYZER V+ MAX4571–MAX4574 10nF N.C. GND a) Off-Isolation b) Crosstalk Figure 1. Off-Isolation and Crosstalk 3V SCL MAX4571 MAX4572 MAX4573 MAX4574 0 VOUT 0 V+ µP 0.
PAGE 10
MAX4571–MAX4574 Serially Controlled, Clickless Audio/Video Switches Detailed Description The MAX4571–MAX4574 are serial-interface controlled switches with soft-mode “clickless” and hard-mode operating capability. The MAX4571/MAX4573 contain 11 SPST switches, while the MAX4572/MAX4574 contain two SPST switches and six SPDT switches. The SPDT switches are actually 2-to-1 multiplexers, in that each SPDT is really two independent SPST switches with a common node, as shown in the Pin Configurations.
PAGE 11
Serially Controlled, Clickless Audio/Video Switches MSB MSB - 1 COMMAND 0 0 RESET 0 1 MODESET 1 0 NO_OP 1 1 SWITCHSET MAX4571–MAX4574 Table 1. Command Bit Mapping DESCRIPTION Sets all switches open and in soft switching mode. Sets specified switches to soft or hard mode. No Operation. Sets specified switches open or closed. Table 2.
PAGE 12
MAX4571–MAX4574 Serially Controlled, Clickless Audio/Video Switches Table 3.
PAGE 13
Serially Controlled, Clickless Audio/Video Switches MAX4573 (11 SPST) MSB LSB COMMAND SWITCH CONTROL D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 C1 C0 X X X SW11 SW10 SW9 SW8 SW7 SW6 SW5 SW4 SW3 SW2 SW1 MAX4574 (6 SPDT + 2 SPST) MSB LSB COMMAND SWITCH CONTROL D15 D14 D13 D12 D11 C1 C0 SW8 SW5 SW7B 70% SDA D10 D9 D8 SW7A SW6B SW6A D7 70% 20% D6 SW4B SW4A D5 D4 D3 SW3B SW3A D2 70% 20% 70% 20% tSU, DAT D1 D0 SW2B SW2A SW1B SW1A
PAGE 14
MAX4571–MAX4574 Serially Controlled, Clickless Audio/Video Switches isters by connecting DOUT of the first device to DIN of the second, etc. Connect the CS pins of all devices together. Data are shifted through the MAX4573/ MAX4574s in series. When CS is brought high, all devices are updated simultaneously. If any of the devices in the chain are to be left unchanged, use a NO_OP command for that device, as shown in Table 1. An alternate way of connecting multiple devices is to decode the CS line.
PAGE 15
Serially Controlled, Clickless Audio/Video Switches ___________________Chip Information TRANSISTOR COUNT: 5397 TOP VIEW MAX4572/MAX4574 NO1A 1 28 V+ COM1 2 27 SDA (DOUT) NO1B 3 26 SCL (DIN) NO2A 4 25 A1 (SCLK) COM2 5 24 A0 (CS) NO2B 6 23 GND NO3A 7 22 NO6A COM3 8 21 COM6 NO3B 9 20 NO6B NO4A 10 19 NO7A COM4 11 18 COM7 NO4B 12 17 NO7B NO5 13 16 NO8 COM5 14 15 COM8 QSOP/SSOP/SO ( ) ARE FOR MAX4574 QSOP.
PAGE 16
Serially Controlled, Clickless Audio/Video Switches SOICW.EPS SSOP.EPS MAX4571–MAX4574 Package Information (continued) 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.