MAX7321AEE datasheet(4/17 Pages) MAXIM

Part #	MAX7321AEE

Description	I2C Port Expander with 8 Open-Drain I/Os

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Manufacturer	MAXIM [Maxim Integrated Products]

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I2C Port Expander with 8 Open-Drain I/Os

4

_______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

0.4

0.2

1.0

0.8

0.6

1.2

1.4

1.8

1.6

2.0

-40

-10 5

-25

20 35 50 65 80 95 110 125

STANDBY CURRENT vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = +3.3V

V+ = +2.5V

V+ = +5.0V

V+ = +1.71V

fSCL = 0kHz

0

20

10

40

30

50

60

-40

-10 5

20

-25

35 50 65 80 95 110 125

SUPPLY CURRENT vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = +3.3V

V+ = +5.0V

V+ = +1.71V

V+ = +2.5V

fSCL = 400kHz

OUTPUT VOLTAGE LOW

vs. TEMPERATURE

TEMPERATURE (

°C)

-40 -25 -10 5

20 35 50 65 80 95 110 125

0

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

V+ = +5.0V

ISINK = 20mA

V+ = +2.5V

ISINK = 10mA

V+ = +1.71V

ISINK = 5mA

V+ = +3.3V

ISINK = 15mA

Pin Description

QSOP

TQFN

TSSOP/

SSOP

NAME

FUNCTION

1, 3

15, 1

6, 9

AD0,

AD2

Address Inputs. Select device slave address with AD0 and AD2. Connect AD0 and

AD2 to either GND, V+, SCL, or SDA to give four logic combinations (see Table 3).

2

16

7

RST

Reset Input, Active Low. Drive RST low to clear the 2-wire interface.

4–7, 9–12

2–5, 7–10

10, 11,

12, 14,

16, 17,

19, 20

P0–P7

Input/Output Ports. P0 to P7 are open-drain I/Os rated at +6V, 20mA.

86

15

GND

Ground

13

11

1

INT

Interrupt Output. INT is an open-drain output rated at +6V.

14

12

2

SCL

I2C-Compatible Serial Clock Input

15

13

4

SDA

I2C-Compatible Serial Data I/O

16

14

5

V+

Positive Supply Voltage. Bypass V+ to GND with a ceramic capacitor of at

—

3,18

N.C.

No Connection. Internally not connected.

—

EP

—EP

Exposed Pad. Connect exposed pad to GND.

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