PCAL6408AHKX NXP Semiconductors, PCAL6408AHKX Datasheet - Page 2

• Manufacturer Part Number: PCAL6408AHKX
• Description: Interface - I/O Expanders 8bit I2C/SMBus IO Expander w/Interrupt
• Manufacturer: NXP Semiconductors

Specifications of PCAL6408AHKX

• Maximum Operating Frequency: 100 kHz
• Operating Supply Voltage: 1.65 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: XQFN-16
• Operating Current: 200 mA
• Output Current: 25 mA
• Product Type: I/O Expanders

NXP Semiconductors
2. Features and benefits
PCAL6408A
Product data sheet
The system master can reset the PCAL6408A in the event of a time-out or other improper
operation by asserting a LOW in the RESET input. The power-on reset puts the registers
in their default state and initializes the I
causes the same reset/initialization to occur without de-powering the part.
The PCAL6408A open-drain interrupt (INT) output is activated when any input state differs
from its corresponding Input Port register state and is used to indicate to the system
master that an input state has changed.
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 I
remain a simple slave device. The input latch feature holds or latches the input pin state
and keeps the logic values that created the interrupt until the master can service the
interrupt. This minimizes the host’s interrupt service response for fast moving inputs.
The device Port P outputs have 25 mA sink capabilities for directly driving LEDs while
consuming low device current.
One hardware pin (ADDR) can be used to program and vary the fixed I
and allow up to two devices to share the same I
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I
Operating power supply voltage range of 1.65 V to 5.5 V
Allows bidirectional voltage-level translation and GPIO expansion between:
Low standby current consumption of 1 A
Schmitt-trigger action allows slow input transition and better switching noise immunity
at the SCL and SDA inputs
5 V tolerant I/O ports
Active LOW reset input (RESET)
Open-drain active LOW interrupt output (INT)
400 kHz Fast-mode I
Internal power-on reset
Power-up with all channels configured as inputs
No glitch on power-up
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
2
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C-bus to parallel port expander
1.8 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
2.5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
3.3 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P
V
V
V
V
hys
hys
hys
hys
= 0.18 V (typical) at 1.8 V
= 0.25 V (typical) at 2.5 V
= 0.33 V (typical) at 3.3 V
= 0.5 V (typical) at 5 V
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 6 December 2012
2
C-bus
Low-voltage translating, 8-bit I
2
C-bus/SMBus state machine. The RESET pin
2
C-bus or SMBus.
2
C-bus. Thus, the PCAL6408A can
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C-bus/SMBus I/O expander
PCAL6408A
2
© NXP B.V. 2012. All rights reserved.
C-bus address
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