Toshiba introduces flexible I/O expander family for mobile telecom, industrial and medical applications
Toshiba Electronics Europe introduced a new family of flexible I/O expander ICs for use in mobile phone handsets and industrial and medical applications. The TC35892/3/4 devices provide a low power solution to help overcome CPU limitations, adding connectivity and programmable functionality, including signal generation, keyboard support and PAL logic functions.The
Toshiba’s new IC family offers the flexibility to handle keyboard configurations with as many as 96 keys in a keyboard matrix. The device monitors for key presses and releases, can detect up to four simultaneous key depressions, and incorporates integral de-bouncing algorithms in hardware. PWM functionality is based on three versatile, cascadable timers that can be programmed to generate modulated PWM signals or well-defined one shot signals, without the need for interaction of an external processor. The rotator wheel state machine counts up or down the rotations of an external rotator wheel and can handle rotator devices with up to three dedicated click positions. The PAL function allows the programmable free logic combination of up to four input signals, generating another signal according to the programmed logic.
Operating from a low frequency 32kHz (optional up to 20MHz) clock source running on a supply voltage from 1.62V to 3.6V (and drawing less than 140μA), TC35892/3/4 family is optimised for low power operation. Three different power modes ensure power consumption is kept low across a wide variety of operating conditions. It can be powered down completely without affecting the connected system.
The devices can be supplied in a miniature 36-pin BGA package with a footprint of just 3.5mm x 3.5mm or 25-pin BGA (3.0 x 3.0mm). QFN package variants are planned to be introduced to satisfy the needs of industrial applications.
Effective project quantities from 20,000pcs upwards can be supported by Toshiba.