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STM1403ASMQ6F Datasheet(PDF) 7 Page - STMicroelectronics

Part # STM1403ASMQ6F
Description  3 V FIPS-140 security supervisor with battery switchover
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM1403ASMQ6F Datasheet(HTML) 7 Page - STMicroelectronics

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STM1403
Description
7/35
Figure 1.
Logic diagram
1.
VREF only for STM1403A; VTPU for STM1403B/C.
2.
Normal mode: low when VOUT is internally switched to VCC and high when VOUT is internally switched to
battery.
3.
SAL, RST, PFO, and BLD are open drain.
Table 2.
Signal names
Note:
See Section 2: Pin descriptions on page 11 for details.
Vccsw(1)
1.
Normal mode: low when VOUT is internally switched to VCC and high when VOUT is internally switched to
battery.
VCC switch output
MR
Manual (push-button) reset input
PFI
Power-fail Input
TP1 - TP4
Independent physical tamper detect pins 1 through 4
VOUT
Supply voltage output
RST(2)
2.
SAL, RST, PFO, and BLD are open drain.
Active-low reset output
PFO(2)
Power-fail output
SAL(2)
Security alarm output
BLD(2)
Battery low voltage detect
VREF
(3)
3.
VREF only for STM1403A; VTPU for STM1403B/C.
1.237 V reference voltage
VTPU
(3)
Tamper pull-up (VCC or VBAT)
VBAT
Backup supply voltage
VCC
Supply voltage
VSS
Ground
AI09682
VCC
VBAT
STM1403
VSS
VOUT
VREF
or
VTPU
(1)
VCCSW
(2)
MR
SAL(3)
BLD(3)
PFI
TP1 (NH)
TP2
(NL)
TP3
(NH)
TP4
(NL)
PFO(3)
RST(3)



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