NCA9555 16-bit I2C-bus I/O port with interrupt
| Price: |
$0.6-$1.2 |
$5.6-$6.5 |
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Replace chip:
Replacement parts:
Replacement chip:
Alternative parts:
Alternative chip:
Pin to pin parts:
Pin 2 pin parts:
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NCA9555 |
TCA9555DBR
TCA9555DBT
TCA9555PWR
TCA9555RGER
TCA9555RTWR
PCA9555DBQR
PCA9555DBR
PCA9555DGVR
PCA9555DWR
PCA9555PWR
PCA9555RGER
PCA9535DBQR
PCA9535DBR
PCA9535DGVR
PCA9535DWR
PCA9535PWR
PCA9535RGER
PCA9535RTWR
TCA9535DBR
TCA9535DBT
TCA9535MRGER
TCA9535PWR
TCA9535RGER
TCA9535RTWR
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The NCA9555 is a 24-pin CMOS device that provides 16 bits of general-purpose parallel Input/Output (GPIO) expansion for I2C-bus applications. It provides a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
The NCA9555 consists of two 8-bit Configuration (Input or Output selection); Input, Output and Polarity Inversion (active HIGH or active LOW operation) registers. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each Input or Output is kept in the corresponding Input or Output register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system master.
The NCA9555 open-drain interrupt 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. The power-on reset sets the registers to their default values and
initializes the device state machine.Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight devices to share the same I2C-bus.
Product Specification
| Operating power supply voltage range |
2.3 V to 5.5 V |
| Latch-up testing exceeds |
100mA
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| Clock frequency |
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| Applications |
GPIO expansion for I2C-bus applications
Servers
Routers (Telecom Switching Equipment)
Personal Computers
Personal Electronics
Products with GPIO-Limited Processors
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| Package options |
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Features
Operating power supply voltage range of 2.3 V to 5.5 V
5 V tolerant I/Os
I2C to Parallel Port Expander
Polarity Inversion register
Active LOW interrupt output
Compatible With Most Microcontrollers
Address by Three Hardware Address Pins for Use of up to Eight Devices
Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
Low standby current
Noise filter on SCL/SDA inputs
No glitch on power-up
Internal power-on reset
16 I/O pins which default to 16 inputs
0 Hz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM, 200 V MM, and 1000 V CDM
Latch-up testing exceeds 100 mA
Applications
GPIO expansion for I2C-bus applications
Servers
Routers (Telecom Switching Equipment)
Personal Computers
Personal Electronics
Products with GPIO-Limited Processors
Packing & Delivery:
1. Shipping Method: Express (SF Express, DHL, TNT, FedEx, etc.), shipping charges are paid by the buyer.
2. Packaging Method: pressure-proof, moisture proof, shock-proof packaging.
3. Shipping Time: In stock items: 3-5 days. Lead Time orders: 45-65 days.
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