stm1404c STMicroelectronics, stm1404c Datasheet - Page 7

• Manufacturer Part Number: stm1404c
• Description: Security Supervisor With Battery Switchover
• Manufacturer: STMicroelectronics

Note:
Figure 1.
1. V
2. Normal Mode: Low when V
3. SAL, RST, PFO, and BLD are open drain.
Table 2.
1. Normal mode: low when V
2. SAL, RST, PFO, and BLD are open drain.
3. V
See
Vccsw
MR
PFI
TP
V
RST
PFO
SAL
BLD
V
V
V
V
V
OUT
REF
TPU
BAT
CC
SS
battery.
battery.
1
REF
REF
(2)
(2)
Section : Pin descriptions on page 12
- TP
(2)
(2)
(3)
(3)
(1)
only for STM1404A; V
only for STM1404A; V
4
Logic diagram
Signal names
V
TP 1 (NH)
CCSW
OUT
OUT
TPU
TPU
PFI
MR
is internally switched to V
(2)
is internally switched to V
for STM1404B/C.
for STM1404B/C.
Manual (push-button) reset input
V
Power-fail input
Independent physical tamper detect pins 1 through 4
Supply voltage output
Active-low reset output
Power-fail output
Security alarm output
Battery low voltage detect
1.237V Reference voltage
Tamper pull-up
(V
Back-up supply voltage
Supply voltage
Ground
BLD
CC
(NL)
TP 2
CC
Switch output
(3)
or V
V
(NH)
STM1404
TP 3
V
TPU
for details.
BAT
REF
or
(1)
)
(NL)
V
TP 4
CC
CC
BAT
and high when V
and High when V
V
V
CC
SS
AI09682a
V
RST
PFO
SAL
OUT
OUT
OUT
(3)
(3)
(3)
is internally switched to
is internally switched to
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