Overview
The PCA9501PW,112 is an 8-bit I/O expander integrated circuit produced by NXP USA Inc. This device is designed to expand the I/O capabilities of a microcontroller or other system master via an I²C or SMBus interface. It features an on-board 2-kbit EEPROM, which can be used to store configuration data, error codes, or other relevant information. The PCA9501PW,112 is particularly useful in applications requiring additional I/O ports and the ability to monitor or control external devices.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Part Number | PCA9501PW,112 |
| Description | IC I/O EXPANDER I2C 8B 20TSSOP |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Voltage - Supply | 2.5 V ~ 3.6 V |
| Interface | I²C, SMBus |
| Number of I/O | 8 |
| Output Type | Push-Pull |
| Interrupt Output | Yes |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Clock Frequency | 0 Hz to 400 kHz |
| Current - Output Source/Sink | 100µA, 25mA |
| EEPROM Capacity | 2-kbit |
Key Features
- 8-bit I/O expander with quasi-bidirectional data pins that can be independently assigned as inputs or outputs.
- On-board 2-kbit EEPROM for storing configuration data, error codes, or board manufacturing information.
- I²C and SMBus interface logic with a clock frequency up to 400 kHz.
- Internal power-on reset and noise filter on SCL/SDA inputs.
- Active LOW interrupt output to indicate changes in input state.
- Six address pins allowing up to 64 devices on the I²C-bus/SMBus.
- Supports hot insertion for use in removable cards on backplane systems.
- Low standby current and 5 V tolerant inputs/outputs.
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101.
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 for various industrial and consumer electronics applications.
Q & A
- What is the PCA9501PW,112 used for?
The PCA9501PW,112 is used to expand the I/O capabilities of a microcontroller or system master via an I²C or SMBus interface.
- What type of EEPROM does the PCA9501PW,112 have?
The PCA9501PW,112 features an on-board 2-kbit EEPROM.
- What is the operating voltage range of the PCA9501PW,112?
The operating voltage range is 2.5 V to 3.6 V.
- What is the maximum clock frequency supported by the PCA9501PW,112?
The maximum clock frequency is 400 kHz.
- Does the PCA9501PW,112 support hot insertion?
Yes, it supports hot insertion for use in removable cards on backplane systems.
- How many devices can be connected on the same I²C-bus/SMBus?
Up to 64 devices can be connected using the six address pins.
- What is the purpose of the interrupt output on the PCA9501PW,112?
The active LOW interrupt output indicates to the system master that an input state has changed and the device needs to be interrogated.
- What type of mounting does the PCA9501PW,112 use?
The PCA9501PW,112 uses surface mount technology.
- What is the operating temperature range of the PCA9501PW,112?
The operating temperature range is -40°C to 85°C.
- Does the PCA9501PW,112 have ESD protection?
Yes, it has ESD protection exceeding 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101.
