Overview
The PCA9501PW,118 is an 8-bit I/O expander produced by NXP USA Inc. This component integrates an on-board 2-kbit EEPROM and is designed to expand the I/O capabilities of a system through an I2C-bus and SMBus interface. It features eight quasi-bidirectional data pins that can be independently assigned as inputs or outputs, making it versatile for various applications such as board version tracking, health monitoring, and multi-card systems in telecom and networking equipment.
Key Specifications
| Attribute | Specification |
|---|---|
| Interface Type | I2C/SMBus |
| Clock Frequency-Max | 400 kHz |
| No of I/O Lines | 8 |
| Supply Voltage-Nom | 2.5 V to 3.6 V |
| Supply Current | ±100 mA |
| Package Style | TSSOP-20 |
| Mounting Method | Surface Mount |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 85°C |
| No. of Pins | 20 Pins |
| ESD Protection | Exceeds 2000 V HBM, 200 V MM, 1000 V CDM |
Key Features
- 8 general purpose input/output expander/collector
- Replacement for PCF8574 with integrated 2-kbit EEPROM
- Internal 256 × 8 EEPROM
- Self-timed write cycle (5 ms typical)
- 16 byte page write operation
- I2C-bus and SMBus interface logic
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- Active LOW interrupt output
- 6 address pins allowing up to 64 devices on the I2C-bus/SMBus
- No glitch on power-up
- Supports hot insertion
- Power-up with all channels configured as inputs
- Low standby current
- 5 V tolerant inputs/outputs
Applications
- Board version tracking and configuration
- Board health monitoring and status reporting
- Multi-card systems in telecom, networking, and base station infrastructure equipment
- Field recall and troubleshooting functions for installed boards
- General-purpose integrated I/O with memory
Q & A
- What is the PCA9501PW,118?
The PCA9501PW,118 is an 8-bit I/O expander with an on-board 2-kbit EEPROM, designed for expanding I/O capabilities through I2C-bus and SMBus interfaces.
- What is the maximum clock frequency of the PCA9501PW,118?
The maximum clock frequency is 400 kHz.
- How many I/O lines does the PCA9501PW,118 have?
The PCA9501PW,118 has 8 I/O lines.
- What is the supply voltage range for the PCA9501PW,118?
The supply voltage range is from 2.5 V to 3.6 V.
- What type of package does the PCA9501PW,118 come in?
The PCA9501PW,118 comes in a TSSOP-20 package.
- Does the PCA9501PW,118 support hot insertion?
- How many devices can share the I2C-bus/SMBus with the PCA9501PW,118?
Up to 64 devices can share the I2C-bus/SMBus due to the six address pins with internal pull-up resistors.
- What is the purpose of the active LOW interrupt output?
The active LOW interrupt output is activated when any input state differs from its corresponding input port register state, indicating to the system master that an input state has changed.
- What is the typical self-timed write cycle for the EEPROM?
The typical self-timed write cycle for the EEPROM is 5 ms.
- Is the PCA9501PW,118 RoHS compliant?
- What is the operating temperature range for the PCA9501PW,118?
The operating temperature range is from -40°C to 85°C.
