TI Presents TPS2221/28 Power Interface Switches

Texas Instruments Inc. (TI, Dallas, TX) announced its new TPS2221 and TPS2228 power interface switches compliant with the new CardBay/CardBus+ standard for PC Cards, which reduce power consumption and prolong battery life in portable applications. The new dual- and single-slot switches are claimed to be the first high-performance devices available to supply 1.8V for low-voltage operation of PC cards, and are suitable for notebook and desktop computers, set-top boxes, personal digital assistants, digital cameras and barcode scanners.

The TPS2228 provides a dual-slot power interface switch for CardBay/CardBus+ controllers with a serial interface, and the TPS2221 provides a single-slot switch for controllers with a parallel interface. Both devices support the distribution of 1.8V, 3.3V and 5V to the PC card slot. The devices offer fully integrated VCC and VPP/VCORE switching, with the capability of programming the VPP/VCORE outputs independently for compatibility with legacy systems. Inputs compatible with TTL logic are offered for flexibility, and short-circuit and thermal protection help ensure system safety.

The new TPS2228 and TPS2221 CardBay switches are now available. The TPS2228 is offered in a thermally enhanced, space-saving, 20-pin, HTSSOP PowerPad package for $2.95 per unit in quantities of 1,000. The TPS2228 is offered in a standard, surface-mount, 30-pin, SSOP package for $3.05 per unit in quantities of 1,000. The TPS2221 is offered in a thermally enhanced, space-saving, 14-pin, HTSSOP PowerPad package for $1.72 per unit in quantities of 1,000.