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TPS3619-33DGKR Datasheet

  • TPS3619-33DGKR

  • BACKUP-BATTERY SUPERVISORS FOR RAM RETENTION

  • 14頁

  • TI

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TPS3619-33, TPS3619-50
TPS3620-33, TPS3620-50
www.ti.com
SLVS387E 鈥?APRIL 2001 鈥?REVISED SEPTEMBER 2004
BACKUP-BATTERY SUPERVISORS FOR RAM RETENTION
FEATURES
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Supply Current of 40 碌A (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 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-For-Pin Compatible With MAX819,
MAX703, and MAX704
8-Pin MSOP Package
Temperature Range -40擄C to 85擄C
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 -40擄C to 85擄C.
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
V
OUT
V
DD
GND
PFI
1
2
3
4
8
7
6
5
V
BAT
RESET
MR
PFO
ACTUAL SIZE
3,05 mm x 4,98 mm
TYPICAL OPERATING CIRCUIT
Power
Supply
0.1
碌F
TPS3619
TPS3620
V
DD
External
Source
R
x
PFI
R
y
Manual
Reset
MR
GND
PFO
Switchover
Capacitor
V
OUT
0.1
碌F
V
CC
GND
I/O
V
BAT
RESET
Backup
Battery
Microcontroller
or
Microprocessor
RESET
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.
Copyright 漏 2001鈥?004, Texas Instruments Incorporated

TPS3619-33DGKR 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 監(jiān)控器

  • -

  • 備用電池電路

  • 1

  • 推挽式，圖騰柱

  • 低有效

  • 最小為 60 ms

  • 2.93V

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 8-MSOP

  • Digi-Reel®

  • 296-31982-6

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