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This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. The PCF8574A device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].
The device features an 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with highcurrent drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.
Product Attribute
Attribute Value
Texas Instruments
Product Category:
Interface - I/O Expanders
8 I/O
I2C, Serial
100 kHz
With Interrupt
6 V
2.5 V
- 40 C
+ 85 C
SMD/SMT
TSSOP-20
1 kV
Reel
Cut Tape
MouseReel
Brand:
Texas Instruments
Features:
Interrupt Pin
Input Voltage:
- 0.5 V to + 0.5 V
Logic Family:
PCF8574A
Operating Supply Voltage:
2.5 V to 6 V
Output Current:
25 mA
Output Voltage:
- 0.5 V to + 0.5 V
Product Type:
I/O Expanders
Series:
PCF8574A
Factory Pack Quantity:
2000
Subcategory:
Interface ICs
Unit Weight:
0.002716 oz
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