NXP's PCAL6524 is a 24-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the Fast-mode Plus (Fm+) I2C bus interface. The ultra-low-voltage interface allows for direct connection to a microcontroller operating down to 0.8 V.
NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, such as in battery-powered mobile applications for interfacing to sensors, push buttons, keypads, and more.
Features and Benefits |
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- I2C bus to parallel port expander
- 1 MHz Fm+ I2C bus
- Operating power supply voltage range of 0.8 V to 3.6 V on the I2C bus side
- Allows bidirectional voltage-level translation and GPIO expansion between 0.8 V to 3.6 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V, and 5.5 V Port P
- Low standby current consumption: 2.0 µA typical at 3.3 V VDD(P)
- Schmitt trigger action allows slow input transition and better switching noise immunity at the GPIO inputs:
- Vhys = 0.05 V (typical) at 0.8 V
- Vhys = 0.18 V (typical) at 1.8 V
- Vhys = 0.33 V (typical) at 3.3 V
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- 5.5 V tolerant I/O ports and 3.6 V tolerant I2C bus pins
- 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 25 mA 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)
- 1000 V Charged-Device Model (C101)
- Packages offered: TSSOP32, HUQFN32
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Applications |
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- Servers
- Telecom switching equipment
- Industrial automation
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- Personal electronics
- Gaming consoles
- Products with GPIO-limited processors
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