STMicroelectronics STM6905
The STM6905 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to five system power supply voltages. This device is targeted at applications such as set-top boxes (STBs), portable, battery-powered systems, networking and communication systems. The device supports a push-button type manual reset input (MR).FEATURES
● Quintuple voltage monitoring● Accurate ±1.8 % across temperature voltage threshold (±1 % at 25 °C)
● Primary supply (VCC) monitor. Fixed (factory - programmed) reset thresholds: 3.078 V to 2.866 V
● Second fixed (V2IN) monitor. Fixed (factoryprogrammed) reset thresholds: 2.333 V to 1.050 V
● Three additional adjustable supply monitor inputs (externally adjustable)
● 600 mV internal reference
● RST output (open drain)
● Output guaranteed for VCC ≥ 0.8 V
● Reset delay time (TREC) on power-up: 210 ms (typ)
● Manual reset input (MR)
● Low supply current of 12 µA (typ)
● Power supply voltage 0.8 V to 5.5 V
● RoHS compliant (green package)
● 8-pin MSOP/TSSOP
● Operating temperature: –40 °C to 85 °C (industrial grade)
APPLICATIONS
● Set-top boxes● Multi-voltage systems
● Cable/satellite applications
● Computer systems
● Data storage equipment Table 1. Device summary(1) Order code VRST1 (V) VRST2 (V) tREC (ms) Package STM6905TZEDS6F 2.333 STM6905TWEDS6F 3.078 1.683 STM6905TGEDS6F STM6905SYEDS6F STM6905SFEDS6F 2.955 1.110 2.188 1.050 210 MSOP8 (TSSOP8) STM6905PWEDS6F 2.866 1.683 1.