PCA9538

ACTIVE

Texas Instruments PCA9538 Product Info

1 April 2026 0

Number of I/Os	8
Features	Configuration registers, Interrupt pin, Reset pin
Supply voltage (min) (V)	2.3
Supply voltage (max) (V)	5.5
Addresses	4
Rating	Catalog
Frequency (max) (MHz)	0.4
Operating temperature range (°C)	-40 to 85

SOIC (DW)-16-106.09 mm² 10.3 x 10.3

Low standby current consumption of 1 µA max
I²C to parallel port expander
Open-drain active-low interrupt output
Active-low reset input
Operating power-supply voltage range of 2.3 V to 5.5 V
5-V Tolerant I/O ports
400-kHz Fast I²C bus
Two hardware address pins allow up to four devices on the I²C/SMBus
Input and output configuration register
Polarity inversion register
Power-up with all channels configured as inputs
No glitch on power up
Noise filter on SCL/SDA inputs
Latched outputs with high-current drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA Per JESD 78, class II
ESD protection exceeds JESD 22
- 2000-V Human-body model (A114-A)
- 200-V Machine model (A115-A)
- 1000-V Charged-device model (C101)

Low standby current consumption of 1 µA max
I²C to parallel port expander
Open-drain active-low interrupt output
Active-low reset input
Operating power-supply voltage range of 2.3 V to 5.5 V
5-V Tolerant I/O ports
400-kHz Fast I²C bus
Two hardware address pins allow up to four devices on the I²C/SMBus
Input and output configuration register
Polarity inversion register
Power-up with all channels configured as inputs
No glitch on power up
Noise filter on SCL/SDA inputs
Latched outputs with high-current drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA Per JESD 78, class II
ESD protection exceeds JESD 22
- 2000-V Human-body model (A114-A)
- 200-V Machine model (A115-A)
- 1000-V Charged-device model (C101)

PCA9538:8-bit 2.3- to 5.5-V I2C/SMBus I/O expander with interrupt, reset & config registers.Package:SOIC (DW)-16-106.09 mm² 10.3 x 10.3

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