STMicroelectronics Adds Chip-Enable to Stand-Alone Watchdog ICs
December 31, 2008 // Published as a news service by IHS
By providing a chip-enable input, the STWD100 stand-alone watchdog timer integrated circuit (IC) from STMicroelectronics (ST) prevents automatic reset generation during in-system programming or boot-up.
According to ST, this enhances flexibility for developers to control and manage applications. Comparable alternative devices do not have chip-enable capability, according to the company.
The STWD100 is housed in a 5 pin SC70-5 package with a footprint of 2.0 millimeters by 2.1 millimeters, which ST said provides printed circuit board (PCB) savings in addition to the convenience of the chip enable. A small outline transistor (SOT) 23-5 package, with a footprint of 2.8 millimeters by 2.8 millimeters, is also available.
The STWD100 is available in a variety of configurations. Timeout periods of 3.4 ms, 6.3 ms, 102 ms or 1.6 s can be specified, while a choice of push-pull or open-drain active-low output configurations simplifies hardware integration, ST said.
The operating temperature range, from –40 degrees Celsius to +125 degrees Celsius, allows use throughout a variety of commercial and industrial environments.
The STWD100 is in full production.
Source: STMicroelectronics (ST).