SX1508B
Overview
The SX1508B and SX1509B are complete ultra low voltage General Purpose parallel Input/Output (GPIO) expanders ideal for low power handheld battery powered equipment. This family of GPIOs comes in 8-, 16-channel configuration and allows easy serial 2 expansion of I/O through a standard 400kHz I C interface.
- 1.2V to 3.6V Low Operating Voltage with Dual Independent I/O Rails (VCC1, VCC2) Enable Direct Level Shifting Between I/O Banks and Host Controller 5.5V Tolerant I/Os, Up to 15mA Output Sink on All I/Os (No Total Sink Current Limit) Integrated LED Driver for Enhanced Lighting Intensity Control (256-step PWM) Blink Control (224 On/Off values) Breathing Control (224 Fade In/Out values) On-Chip Keypad Scanning Engine Support Up to 8x8 Matrix (64 Keys) Configurable Input Debouncer 8/16 Channels of True Bi-directional Style I/O Programmable Pull-up/Pull-down Push/Pull or Open-drain outputs Programmable Polarity Open Drain Active Low Interrupt Output (NINT) Bit Maskable Programmable Edge Sensitivity Built-in Clock Management (Internal 2MHz Oscillator/External Clock Input, 7 clock values) OSCIO can be Configured as GP
