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NXP Semiconductors PCAL6534 34-bit General Purpose I/O Expander

NXP Semiconductors PCAL6534 34-bit General Purpose I/O (GPIO) Expander provides remote I/O expansion for most microcontroller families via the Fast-mode Plus (Fm+) I2C-bus interface. The PCAL6534 fully meets the Fm+ I2C-bus specification at speeds to 1MHz. This device also implements Agile I/O, which is an additional feature set specifically designed to enhance I/O interface. These additional features include programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs. The ultra-low-voltage interface of the PCAL6534 allows for direct connection to microcontrollers operating down to 0.8V.

The NXP Semiconductors PCAL6534 includes level translating from the 1.65V to 5.5V I/O range, Agile I/O input latch, programmable output current, and integrated resistors. The PCAL6534 features a wide voltage range, enabling it to match ultra-low voltage FPGAs and processors. The PCAL6534 can also simplify routing by pulling the I/Os for system management way from the processor, which may be densely packed with other critical functions.

The PCAL6534 is offered in a compact, 48-bump VFBGA (Very Thin Profile Fine Pitch Ball Grid Array) package, with 0.4mm bump spacing.

Features

  • Operating power supply voltage range of 0.8V to 3.6V on the I2C-bus
    • Allows bidirectional voltage-level translation and GPIO expansion between 0.8V to 3.6V SCL/SDA and 1.8V, 2.5V, 3.3V, 5.5V I/O ports
  • Low standby current consumption: 2.0µA typical at 3.3V VDD(P)
  • Schmitt trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
    • Vhys = 0.05V (typical) at 0.8V
    • Vhys = 0.18V (typical) at 1.8V
    • Vhys = 0.33V (typical) at 3.3V
  • 5.5V tolerant I/O ports and 3.6V tolerant I2C-bus lines
  • 1MHz Fast-mode Plus I2C-bus
  • Active LOW reset input (RESET)
  • Open-drain active LOW interrupt output (INT)
  • Internal power-on reset
  • Noise filter on SCL/SDA inputs
  • Latched outputs with 25mA drive maximum capability for directly driving LEDs
  • Latch-up performance exceeds 100mA per JESD 78, Class II
  • 2.6mm x 3.0mm package dimensions
  • 0.4mm bump spacing
  • ESD protection exceeds JESD
    • 222000V Human-Body Model (A114-A)
    • 1000 V Charged-Device Model (C101)Package type: VFBGA-42
  • Agile I/O Features
    • Output port configuration
      • Bank selectable or pin selectable push-pull or open-drain output stages
    • Interrupt status
      • Read-only register identifies the source of an interrupt
    • Bit-wise I/O programming features
      • Output drive strength: four programmable drive strengths to reduce rise and fall times in low-capacitance applications
      • Input latch: Input Port register values changes are kept until the Input Port register is read
      • Pull-up/pull-down enable: floating input or pull-up/pull-down resistor enable
      • Pull-up/pull-down selection: 100 kΩ pull-up/pull-down resistor selection
      • Interrupt mask: mask prevents the generation of the interrupt when input changes state to prevent spurious interrupts
    • Interrupt edge specification on a bit-by-bit basis
    • Interrupt individual clear without disturbing other events
    • Read all interrupt events without clear
    • Switch debounce hardware
    • General call software reset
    • I2C software Device ID function

Applications

  • Automotive
    • Automotive window control
  • Consumer Electronics
    • Consumer phones and game controllers
  • Networking
    • Networking switches and routers
  • Power and Energy
    • IO buttons

Block Diagram

Block Diagram - NXP Semiconductors PCAL6534 34-bit General Purpose I/O Expander

Typical Application Circuit

Application Circuit Diagram - NXP Semiconductors PCAL6534 34-bit General Purpose I/O Expander

Videos

Development Tools

NXP Semiconductors PCAL6534EV 34-Bit GPIO Arduino Shield

Demonstration and development platform for the PCAL6534 Ultra-Low Voltage I/O Expander.

Learn Moreabout NXP Semiconductors PCAL6534EV 34-Bit GPIO Arduino Shield View Productsrelated to NXP Semiconductors PCAL6534EV 34-Bit GPIO Arduino Shield

Related Products

NXP Semiconductors PCAL6524 Ultra-Low Voltage I/O Expanders

Provide remote I/O expansion for microcontrollers via the Fast-mode Plus (Fm+) I2C-bus interface.

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NXP Semiconductors I2C General Purpose I/O Expanders

GPIO expansion for most microprocessor families, saving microprocessor GPIOs for critical functions.

Learn Moreabout NXP Semiconductors I2C General Purpose I/O Expanders View Productsrelated to NXP Semiconductors I2C General Purpose I/O Expanders

Additional Resources

Published: 2019-03-27 | Updated: 2023-07-06