MAX4584 查看數據表（PDF） - Maxim Integrated

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MAX4584

Serially Controlled Audio/Video Switches

Maxim Integrated 

Serially Controlled

Audio/Video Switches

MAX4584

1

2

—

3

—

4

5

—

6

7

8

9

10

PIN

MAX4585

1

—

2

—

3

4

—

5

6

7

8

9

10

NAME

COM1

A

CS

SDA

DIN

V+

SCL

SCLK

NO2

COM2

GND

NO1B

NO1A

Pin Description

FUNCTION

Analog Switch SPDT Common Terminal

LSB+2 of the 2-Wire Serial-Interface Address Field

Chip Select of the 3-Wire Serial Interface

Data Input of the 2-Wire Serial Interface

Data Input of the 3-Wire Serial Interface

Supply Voltage

Clock Input of the 2-Wire Serial Interface

Clock Input of the 3-Wire Serial Interface

Normally Open SPST Terminal

Analog Switch SPST Common Terminal

Ground

Normally Open Terminal

Normally Open Terminal

70%

70%

SDA

20%

20%

tSU, DAT

tLOW

tHD, DAT

SCL

tHD, STA

70%

20%

START CONDITION

70%

70%

20%

20%

tHIGH

tR

tF

tSU, STA

70%

20%

tHD, STA

70%

70%

REPEATED START CONDITION

tSU, STO

70%

20%

tBUF

70%

70%

20%

STOP CONDITION START CONDITION

Figure 1. 2-Wire Serial-Interface Timing Diagram

_______________Detailed Description

The MAX4584/MAX4585 are serial-interface, program-

mable switches. Each device contains one normally

open (NO) single-pole/single-throw (SPST) switch and

one single-pole/double-throw (SPDT) switch. The

switches are independently controlled through the on-

chip serial interface. The MAX4584 uses a 2-wire I2C-

compatible serial communications protocol; the

MAX4585 uses a 3-wire SPI/QSPI/MICROWIRE-com-

patible serial communications protocol.

These devices operate from a single +2.7V to +5.5V

supply and are optimized for use with an audio fre-

quency of 20kHz and video frequencies up to 10MHz.

They feature 65Ω on-resistance, 4Ω on-resistance

matching between channels, and 5Ω on-resistance flat-

ness. Audio off-isolation is -83dB at 20kHz, and

crosstalk is at least -84dB at 20kHz. Video off-isolation

is -48dB at 10MHz, and crosstalk is at least -60dB at

10MHz.

__________Applications Information

Switch Control

The MAX4584/MAX4585 have a common command-bit

structure; the only difference between them is the inter-

face 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 com-

mand is issued, a logic “1” in any data-bit location clos-

8 _______________________________________________________________________________________

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