TPS3619-33-EP Datasheet, PDF (1/18 Pages) Texas Instruments – BACKUP-BATTERY SUPERVISORS FOR RAM RETENTION

TPS3619-33-EP, TPS3619-50-EP
TPS3620-33-EP, TPS3620-50-EP
www.ti.com
SGLS350C – JULY 2006 – REVISED SEPTEMBER 2010
BACKUP-BATTERY SUPERVISORS FOR RAM RETENTION
Check for Samples: TPS3619-33-EP, TPS3619-50-EP, TPS3620-33-EP, TPS3620-50-EP
FEATURES
1
• Supply Current of 40 mA (Max)
• Battery-Supply Current of 100 nA (Max)
• Precision Supply-Voltage Monitor 3.3 V, 5 V,
and Other Options on Request
• Backup-Battery Voltage Can Exceed V_DD
• 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-to-Pin Compatible With MAX819, MAX703,
and MAX704
• 8-Pin Mini Small-Outline Package (MSOP)
Package
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (–55°C/125°C)
Temperature Range⁽¹⁾
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
(1) Additional temperature ranges available - contact factory
DGK PACKAGE
(TOP VIEW)
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 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 (V_DD or V_BAT) becomes higher than 1.1
V. Thereafter, the supply voltage supervisor monitors
V_DD and keeps RESET output active as long as V_DD
remains below the threshold voltage (V_IT). An internal
timer delays the return of the output to the inactive
state (high) to ensure proper system reset. The delay
time starts after V_DD has risen above V_IT. When the
supply voltage drops below V_IT, the output becomes
active (low) again.
The product spectrum is designed for supply voltages
of 3.3 V and 5 V. The TPS3619 and TPS3620 are
available in an 8-pin MSOP package and are
characterized for operation over a temperature range
of –55°C to 125°C.
V_OUT
1
V_DD
2
GND
3
PFI
4
8
V_BAT
7
RESET
ACTUAL SIZE
6
MR
3,05 mm x 4,98 mm
5
PFO
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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