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| Catalyst Semiconductor's New Family of I/O Bus Expanders Catalyst Semiconductor has announced the expansion of its product lines to include a new family of I/O bus expanders. The first two devices in the family, the CAT9554 and CAT9554A, provide a simple and cost-effective method to address eight I2C or SMBus I/O ports. These new devices help designers balance system performance, processor, and board costs for sensor, control, and LED applications in white goods, digital cameras, cell phones, PDAs, routers, hubs and servers. The CAT9554 and CAT9554A consist of eight ports, which power up as inputs and can be configured as an input or output by writing to a register. An internal power-on reset in both devices eliminates glitches on power-up. Each I/O port is 5V input tolerant, with a high current I/O drive sink of up to 25mA and an I/O source of up to 10mA, maximum. Additionally, each I/O port is compatible with logic thresholds of 2.5V, 3.3V and 5V. The CAT9554 and CAT9554A have different fixed slave addresses to avoid conflict issues and double the potential I/O capabilities. CAT9554, CAT9554A Product Features: - Second source to Philips PCA9554/PCA9554A - 2.3V to 5.5V operation - 8 I/O pins that default to inputs at power-up - Industrial Operating Temperature: -40 degrees C to +85 degrees C - 16-pin SOIC, TSSOP and 16-pad 4x4 TQFN packages - 100% RoHS-compliant green packages. write your comments about the article :: © 2006 Networking News :: home page |