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Product details

Parameters

Number of I/Os 8 Features Configuration registers, Interrupt pin Supply voltage (Min) (V) 2.3 Supply voltage (Max) (V) 5.5 Addresses 8 Rating Catalog Frequency (Max) (kHz) 400 Operating temperature range (C) -40 to 85 open-in-new Find other I2C general-purpose I/Os (GPIOs)

Package | Pins | Size

SOIC (DW) 16 77 mm² 7.52 x 10.28 SSOP (DB) 16 48 mm² 6.2 x 7.8 TSSOP (PW) 16 22 mm² 4.4 x 5 TVSOP (DGV) 16 23 mm² 3.6 x 6.4 VQFN (RGT) 16 9 mm² 3 x 3 VQFN (RGV) 16 16 mm² 4 x 4 open-in-new Find other I2C general-purpose I/Os (GPIOs)

Features

  • Low standby current consumption of 1 µA max
  • I2C to Parallel port expander
  • Open-drain active-low interrupt output
  • Operating power-supply voltage range of 2.3 V to 5.5 V
  • 5-V Tolerant I/O ports
  • 400-kHz Fast I2C bus
  • Three hardware address pins allow up to eight devices on the I2C/SMBus
  • Allows up to 16 devices on the I2C/SMBus when used in conjunction with the PCA9534 See Section 5 for I2C Expander offerings
  • Input and output configuration register
  • Polarity inversion register
  • Internal power-on reset
  • Power-up with all channels configured as Inputs
  • No glitch on power-up
  • Noise filter on SCL and 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)
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Description

The PCA9534A and PCA9534 are identical, except for their fixed I2C address. This allows for up to 16 of these devices (8 of each) on the same I2C bus.

INT can be connected to the interrupt input of a 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 I2C bus. Thus, the PCA9534A can remain a simple slave device.

The device’s outputs (latched) have high-current drive capability for directly driving LEDs. It has low current consumption.

Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus.

The PCA9534A is pin-to-pin and I2C address compatible with the PCF8574A. However, software changes are required due to the enhancements in the PCA9534A over the PCF8574A.

The PCA9534A is a low-power version of the PCA9554A. The only difference between the PCA9534A and PCA9554A is that the PCA9534A eliminates an internal I/O pullup resistor, which dramatically reduces power consumption in the standby mode when the I/Os are held low.

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Technical documentation

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Type Title Date
* Data sheet PCA9534A Remote 8-BIT I2C and SMBus Low-Power I/O Expander With Interrupt Output And Configuration Registers datasheet (Rev. J) Mar. 11, 2021
Application note I2C Dynamic Addressing Apr. 25, 2019
Selection guide Logic Guide (Rev. AB) Jun. 12, 2017
Application note Choosing the Correct I2C Device for New Designs Sep. 07, 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
Application note Understanding the I2C Bus Jun. 30, 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters May 15, 2015
Application note I2C Bus Pull-Up Resistor Calculation Feb. 13, 2015
Application note Programming Fun Lights With TI's TCA6507 Nov. 30, 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004

Design & development

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CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options
SSOP (DB) 16 View options
TSSOP (PW) 16 View options
TVSOP (DGV) 16 View options
VQFN (RGT) 16 View options
VQFN (RGV) 16 View options

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