STM1404ARMBQ6F STMICROELECTRONICS [STMicroelectronics], STM1404ARMBQ6F Datasheet - Page 8

• Manufacturer Part Number: STM1404ARMBQ6F
• Description: 3 V FIPS-140 security supervisor with battery switchover
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Description
Note:
8/36
Figure 2.
See
1. Normal mode: low when V
2. SAL, RST, PFO, and BLD are open drain.
3. V
Figure 3.
1. Required for battery-reverse charging protection
2. User supplied
3. Open drain
4. V
battery.
REF
REF
Section 2: Pin descriptions on page 11
only for STM1404A; V
only for STM1404A; V
V CC
MR
PFI
QFN16 connections
Block diagram
BAT54J
V BAT
(1)
(1,2)
RST
SAL
V
MR
SS
(2)
(2)
OUT
TPU
TPU
is internally switched to V
for STM1404B/C.
for STM1404B/C
BLD
1
2
3
4
TP 1 (NH)
TP 2 (NL)
TP 3 (NH)
TP 4 (NL)
V INT
(NH)
16
TP 1
5
(2)
V SO
V RST
V PFI
V DET
V HV
V LV
PFI
15
(NL)
TP 2
6
V
COMPARE @
1.237V V REF
CCSW
POWER-UP
COMPARE
COMPARE
COMPARE
COMPARE
COMPARE
High Temp.
Generator
Low Temp.
T A > T H
T A < T L
(NH)
14
Sense
Sense
TP 3
for details.
7
(1)
CC
V
(NL)
TP 4
13
CC
and high when V
8
12
11
10
9
V
V
V
PFO
OUT
BAT
REF or
(2)
OUT
Generator
AI09683
V
t rec
TPU
is internally switched to
(3)
AI09684a
V OUT
V TPU
V REF (4)
V CCSW
RST
PFO
BLD (3)
SAL
(3)
(3)
(3)
(4)
STM1404