PCA9621

PCA9621 65 mA 8-bit 2-wire bus output port Rev. 1 — 9 March 2011 Product data sheet 1. General description The PCA9621 is a monolithic CMOS integrated circuit for general purpose output drive configurable from a 2-wire bus interface (including I2C-bus, SMBus, PMBus, and other systems based on similar principles). Output ports have a 65 mA sink capability, making them ideal for driving LEDs. The state of the outputs is determined by a programmable 8-bit register which can be read and written via signals from the 2-wire bus (e.g., I2C-bus or similar). The 2-wire bus interface also has 30 mA Fast-mode Plus (Fm+) capability, and consequently can be run in excess of 1 MHz or up to 4000 pF capacitance. As such, the PCA9621 can be connected to other 2-wire devices across long cable connections. It can be mixed with other Fast-mode Plus slaves in systems driven by Fm+ buffers or by the PCA9646 (fully buffered 4-channel bus switch) to build large scale systems with high-speed or high-capacitance drive capability, for example large scale LED displays or controlled lighting. 2. Features and benefits „ „ „ „ „ „ 8 individually selectable open-drain output ports 65 mA static sink capability on all output ports Ports may be paralleled for up to 500 mA drive Ideal for simple LED or general purpose output drive Fast-mode Plus (30 mA, 4000 pF) 2-wire bus capability Works with I2C-bus (Standard-mode, Fast-mode, and Fast-mode Plus), SMBus (standard and high power mode), and PMBus „ Fast switc...