SANTA CLARA, Calif.Catalyst Semiconductor, Inc. has added to its I/O expander product portfolio the CAT9555, a CMOS device that is designed to provide a cost-effective method of enabling 16-bit I²C or SMBus general purpose I/O expansion for microcontrollers.
Similar to the recently announced CAT9554 8-bit I/O expander, the CAT9555 helps designers balance system performance, processor and board costs for sensor, control and LED applications in white goods, digital cameras, cell phones, PDAs, satellite radios, routers, hubs and servers. The CAT9555 is offered as a second source to Philips' PCA9555 bus expander.
The CAT 9555 consists of two 8-bit ports, which power up as inputs and can be configured as an input or output by writing to a register. The fixed part of the I²C slave address is the same as the 8-bit CAT9554 device, allowing any combination of up to eight of these devices to be connected on the same bus. This gives designers the flexibility to control the exact number of functions their system requires.
An internal power-on reset circuit initializes the device and sets the registers to their default values.
Each I/O port is 5- input tolerant, with a high current I/O drive sink of up to 25-mA and an I/O source of up to 10-mA, maximum. Additionally, each I/O port is compatible with logic thresholds of 2.5-V, 3.3-V and 5-V.
The CAT9555 is available in three RoHS-compliant package options: 24-lead SOIC, 24-pin TSSOP, and 24-pad 4-mmx4-mm TQFN. Pricing for 10,000 piece quantities is $0.75 each. Samples are now available. Projected lead-times for production quantities are currently 6 to 8 weeks ARO.
Click here for a datasheet: www.catsemi.com/datasheets/9555.pdf
Catalyst Semiconductor Corp., 1-408-542-1000, www.catsemi.com