Datasheet Texas Instruments TPS3620-33DGKR — 数据表

TPS3619-33, TPS3619-50
TPS3620-33, TPS3620-50
www.ti.com SLVS387H – APRIL 2001 – REVISED DECEMBER 2007 BACKUP-BATTERY SUPERVISORS FOR RAM RETENTION
FEATURES 1 DESCRIPTION Supply Current of 40 ВµA (Max) Battery-Supply Current of 100 nA (Max) Precision Supply Voltage Monitor 3.3 V, 5 V,
Other Options on Request Backup-Battery Voltage Can Exceed VDD Power On Reset Generator With Fixed 100-ms
Reset Delay Time Voltage Monitor For Power-Fail or Low-Battery
Monitoring Battery Freshness Seal (TPS3619) Pin-For-Pin Compatible With MAX819,
MAX703, and MAX704 8-Pin MSOP Package Temperature Range –40°C to +85°C
2 The TPS3619 and TPS3620 families of supervisory
circuits monitor and control processor activity by
providing backup-battery switchover for data retention
of CMOS RAM.
During power on, RESET is asserted when the
supply voltage (VDD or VBAT) becomes higher than 1.1
V. Thereafter, the supply voltage supervisor monitors
VDD and keeps RESET output active as long as VDD
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. The delay
time starts after VDD has risen above VIT. When the
supply voltage drops below VIT, the output becomes
active (low) again.
The product spectrum is designed for supply voltages …