Overview
The PCA9501D,118 is an 8-bit I/O expander produced by NXP USA Inc., designed to enhance the input/output capabilities of microcontrollers and other system leaders. This component features an on-board 2-kbit EEPROM, allowing for the storage of error codes, board manufacturing data, and other diagnostic information. The eight quasi-bidirectional data pins can be independently assigned as inputs or outputs, making it versatile for monitoring board level status or activating indicator devices such as LEDs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2.5 to 3.6 | V |
| Standby Current (IDDQ) | 60 | µA |
| Supply Current (Read) | 1 | mA |
| Supply Current (Write) | 2 | mA |
| Power-on Reset Voltage (VPOR) | 2.4 | V |
| LOW-level Input Voltage (VIL) | -0.5 to 0.3VDD | V |
| HIGH-level Input Voltage (VIH) | 0.7VDD to 5.5 | V |
| Clock Frequency | 0 Hz to 400 kHz | Hz |
| Address Pins | 6 | - |
| Maximum Devices on I²C-bus | 64 | - |
| Package Types | SO20, TSSOP20, HVQFN20 | - |
Key Features
- 8-bit I/O expander with on-board 2-kbit EEPROM
- Eight quasi-bidirectional data pins configurable as inputs or outputs
- Active LOW open-drain interrupt output for indicating input state changes
- I²C-bus and SMBus interface logic
- Internal power-on reset and noise filter on SCL/SDA inputs
- Support for hot insertion in removable cards on backplane systems
- Low standby current and operating power supply voltage range of 2.5 V to 3.6 V
- 5 V tolerant inputs/outputs
- ESD protection exceeds 2000 V HBM, 200 V MM, and 1000 V CDM
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 PCA9501D,118? The PCA9501D,118 is an 8-bit I/O expander with an on-board 2-kbit EEPROM produced by NXP USA Inc.
- What are the key features of the PCA9501D,118? It includes eight quasi-bidirectional data pins, an active LOW open-drain interrupt output, I²C-bus and SMBus interface logic, and internal power-on reset.
- What is the operating voltage range of the PCA9501D,118? The operating voltage range is from 2.5 V to 3.6 V.
- How many devices can share the I²C-bus with the PCA9501D,118? Up to 64 devices can share the I²C-bus due to its six address pins.
- What types of packages are available for the PCA9501D,118? The component is available in SO20, TSSOP20, and HVQFN20 packages.
- What is the purpose of the EEPROM in the PCA9501D,118? The EEPROM is used to store error codes, board manufacturing data, and other diagnostic information.
- Does the PCA9501D,118 support hot insertion? Yes, it supports hot insertion for use in removable cards on backplane systems.
- What is the clock frequency range of the PCA9501D,118? The clock frequency range is from 0 Hz to 400 kHz.
- What kind of ESD protection does the PCA9501D,118 offer? It offers ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.
- What are some common applications of the PCA9501D,118? Common applications include board version tracking, board health monitoring, and multi-card systems in telecom and networking equipment.
