TEXAS INSTRUMENTS  PCF8574N  I/O Expander, 8bit, 100 kHz, I2C, 2.5 V, 6 V, DIP


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Product Overview

The PCF8574N is a 8-bit input/output (I/O) Expander for the two-line bidirectional bus (I²C) is designed for 2.5 to 6V VCC operation. This device provides general-purpose remote I/O expansion for most microcontroller families by way of 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 high-current 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.
  • Low Standby-current Consumption of 10µA Maximum
  • I²C to Parallel-port Expander
  • Open-drain Interrupt Output
  • Compatible with Most Microcontrollers
  • Latched Outputs with High-current Drive Capability for Directly Driving LEDs
  • Latch-up Performance Exceeds 100mA Per JESD 78, Class II


Communications & Networking; Computers & Computer Peripherals; Consumer Electronics; Industrial; Automation & Process Control; Signal Processing
Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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Product Specifications, Documents & More

  • Bus Frequency: 100kHz
  • Chip Configuration: 8bit
  • IC Interface Type: I2C
  • Interface Case Style: DIP
  • MSL: -
  • No. of I/O's: 8
  • No. of Pins: 16
  • Packaging: Each
  • SVHC: No SVHC (15-Jun-2015)
  • Supply Voltage Max: 6V
  • Supply Voltage Min: 2.5V
  • Supply Voltage Range: 2.5V to 6V

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Availability:  1,453

  • 1,453 in stock for same day shipping
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    More stock available week commencing 1/11/16

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Price: $1.59 $1.59



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1 - 9 $1.59
10 - 99 $1.27
100 - 499 $1.07
500 - 999 $0.81
1000 - 2499 $0.758
2500 - 4999 $0.675
5000 - 9999 $0.67
10000+ $0.665

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