PCA9554

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2

Figure 1. Block Diagram

8−BIT

WRITE pulse

READ pulse

LP FILTER

POWER−ON

RESET

INPUT

FILTER

CONTROL

A0

A1

A2

SDA

SCL

INPUT/

OUTPUT

PORTS

INT

Note: All I/Os are set to inputs at RESET.

Table 1. PIN DESCRIPTION

TSSOP

Pin Name

Function

1

A0

Address Input 0

2

A1

Address Input 1

3

A2

Address Input 2

4−7

Input/Output Port 0 to Input/Output Port 3

8

Ground

9−12

Input/Output Port 4 to Input/Output Port 7

13

INT

Interrupt Output (open drain)

14

SCL

Serial Clock

15

SDA

Serial Data

16

Power Supply

Table 2. ABSOLUTE MAXIMUM RATINGS

Parameters

Ratings

Units

−0.5 to +6.5

V

Voltage on Any Pin with Respect to Ground

−0.5 to +5.5

V

±50

mA

DC Input Current

±20

mA

85

mA

100

mA

1.0

W

Junction Temperature

+150

°C

Storage Temperature

−65 to +150

°C

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

Table 3. RELIABILITY CHARACTERISTICS

Symbol

Parameter

Reference Test Method

Min

Units

ESD Susceptibility

JEDEC Standard JESD 22

2000

Volts

Latch−up

JEDEC Standard 17

100

mA

2. This parameter is tested initially and after a design or process change that affects the parameter.