pca8574 NXP Semiconductors, pca8574 Datasheet
pca8574
Manufacturer Part Number
pca8574
Description
Pca8574/pca8574a Remote 8-bit I/o Expander For I2c-bus With Interrupt
Manufacturer
NXP Semiconductors
Datasheet
1.PCA8574.pdf
(27 pages)
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1. General description
2. Features
3. Applications
The PCA8574/74A provide general purpose remote I/O expansion for most
microcontroller families via the two-line bidirectional I
data (SDA)).
The devices consist of an 8-bit quasi-bidirectional port and an I
PCA8574/74A have low current consumption and include latched outputs with 25 mA high
current drive capability for directly driving LEDs.
The PCA8574/74A also possess an interrupt line (INT) that can be connected to the
interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote
I/O can inform the microcontroller if there is incoming data on its ports without having to
communicate via the I
The internal Power-On Reset (POR) initializes the I/Os as inputs.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
PCA8574/74A
Remote 8-bit I/O expander for I
Rev. 02 — 14 May 2007
400 kHz I
2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
8-bit remote I/O pins that default to inputs at power-up
Latched outputs with 25 mA sink capability for directly driving LEDs
Total package sink capability of 200 mA
Active LOW open-drain interrupt output
8 programmable slave addresses using 3 address pins
Readable device ID (manufacturer, device type, and revision)
Low standby current (10 A max.)
ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115, and 1000 V CDM per JESD22-C101
Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
Packages offered: DIP16, SO16, TSSOP16, SSOP20
LED signs and displays
Servers
Industrial control
Medical equipment
PLCs
40 C to +85 C operation
2
C-bus interface
2
C-bus.
2
C-bus with interrupt
2
C-bus (serial clock (SCL), serial
2
C-bus interface. The
Product data sheet
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