MAX7300_11 Datasheet, PDF(1/20 Page) Maxim Integrated Products – 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander

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MAX7300_11 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander

19-2413; Rev 7; 9/11

2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or

28-Port I/O Expander

General Description

The MAX7300 compact, serial-interfaced, I/O expan-

sion peripheral provides microprocessors with up to 28

ports. Each port is individually user configurable to

either a logic input or logic output.

Each port can be configured as either a push-pull logic

output capable of sinking 10mA and sourcing 4.5mA, or a

Schmitt logic input with optional internal pullup. Seven

ports feature configurable transition detection logic, which

generates an interrupt upon change of port logic level.

The MAX7300 is controlled through an I2C-compatible 2-

wire serial interface, and uses four-level logic to allow 16

I2C addresses from only two select pins.

The MAX7300AAX and MAX7300ATL have 28 ports and

are available in 36-pin SSOP and 40-pin TQFN pack-

ages, respectively. The MAX7300AAI and MAX7300ATI

have 20 ports and are available in 28-pin SSOP and

TQFN packages. For an SPI-interfaced version, refer to

the MAX7301 data sheet. For a pin-compatible port

expander with additional 24mA constant-current LED

drive capability, refer to the MAX6956 data sheet.

Applications

White Goods

Industrial Controllers

Automotive

System Monitoring

Pin Configurations

TOP VIEW

ISET 1

GND 2

GND 3

AD0 4

P12 5

P13 6

P14 7

P15 8

P16 9

P17 10

P18 11

P19 12

P20 13

P21 14

MAX7300

28 V+

27 AD1

26 SCL

25 SDA

24 P31

23 P30

22 P29

21 P28

20 P27

19 P26

18 P25

17 P24

16 P23

15 P22

28 SSOP

Pin Configurations continued at end of data sheet.

Features

o 400kbps I2C-Compatible Serial Interface

o 2.5V to 5.5V Operation

o -40Â°C to +125Â°C Temperature Range

o 20 or 28 I/O Ports, Each Configurable as

Push-Pull Logic Output

Schmitt Logic Input

Schmitt Logic Input with Internal Pullup

o 11ÂµA (max) Shutdown Current

o Logic Transition Detection for Seven I/O Ports

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX7300AAI

-40Â°C to +125Â°C 28 SSOP

MAX7300ATI

-40Â°C to +125Â°C 28 TQFN-EP*

MAX7300AAX

-40Â°C to +125Â°C 36 SSOP

MAX7300ATL

-40Â°C to +125Â°C 40 TQFN-EP*

*EP = Exposed pad.

Devices are also available in a lead(Pb)-free/RoHS-compliant pack-

age. Specify lead-free by adding "+" to the part number when order-

ing. Devices are also available in tape-and-reel packaging. Specify

tape and reel by adding "T" to the part number when ordering.

Typical Operating Circuit

47nF

39kâ¦

DATA

CLOCK

36 V+

3 GND

GND

ISET

AD1

4 AD0

33 SDA

34 SCL

31 P31

29 P30

27 P29

25 P28

24 P27

23 P26

22 P25

21 P24

MAX7300AAX

P4 32

P5 30

P6 28

P7 26

P8 5

P9 7

P10 9

P11 11

P12 6

P13 8

P14 10

P15 12

P16 13

P17 14

P18 15

P19 16

P20 17

P21 18

P22 19

P23 20

I/O 4

I/O 5

I/O 6

I/O 7

I/O 8

I/O 9

I/O 10

I/O 11

I/O 12

I/O 13

I/O 14

I/O 15

I/O 16

I/O 17

I/O 18

I/O 19

I/O 20

I/O 21

I/O 22

I/O 23

I/O 24

I/O 25

I/O 26

I/O 27

I/O 28

I/O 29

I/O 30

I/O 31

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maximâs website at www.maxim-ic.com.

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