features

Supply Current of 40 μA (Max)

Precision Supply Voltage Monitor

− 2.0 V, 2.5 V, 3.3 V, 5.0 V

− Other Versions on Request

Watchdog Timer With 800-ms Time-Out

Backup-Battery Voltage Can Exceed VDD

Power-On Reset Generator With Fixed

100-ms Reset Delay Time

Battery OK Output

Voltage Monitor for Power-Fail or

Low-Battery Monitoring

Manual Switchover to Battery-Backup

Mode

Chip-Enable Gating −3 ns (at VDD = 5 V)

Max. Propagation Delay

Manual Reset

Battery Freshness Seal

14-Pin TSSOP Package

Temperature Range . . . −40°C to 85°C

typical applications

Fax Machines

Set-Top Boxes

Advanced Voice Mail Systems

Portable Battery Powered Equipment

Computer Equipment

Advanced Modems

Automotive Systems

Portable Long-Time Monitoring Equipment

Point of Sale Equipment

description

The TPS3600 family of supervisory circuits monitor and control processor activity. In case of power-fail or

brownout conditions, the backup-battery switchover function of TPS3600 allows to run a low-power processor

and its peripherals from the installed backup battery without asserting a reset beforehand.

During power on, RESET is asserted when the supply voltage (VDD or VBAT) becomes higher than Vres.

Thereafter, the supply voltage supervisor monitors VOUT and keeps RESET output active as long as VOUT

remains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive state

(high) to ensure proper system reset. This delay timer starts its time-out, after VOUT has risen above the

threshold voltage (VIT). In case of a brownout or power failure of both supply sources, a voltage drop below the

threshold voltage (VIT) get detected and the output becomes active (low) again.

The product spectrum is designed for supply voltages of 2 V, 2.5 V, 3.3 V, and 5 V. The circuits are available

in a 14-pin TSSOP package. They are characterized for operation over a temperature range of −40°C to 85°C.