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STM1404CSNDQ6F Fiches technique(PDF) 9 Page - STMicroelectronics

No de pièce STM1404CSNDQ6F
Description  3 V FIPS-140 security supervisor with battery switchover
PDF  35 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM1404CSNDQ6F Fiches technique(HTML) 9 Page - STMicroelectronics

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STM1404
Description
9/36
Figure 4.
Hardware hookup
1.
Normal mode: low when VOUT is internally switched to VCC and high when VOUT is internally switched to
battery.
2.
Capacitor (C) is typically
≥ 10 µF.
3.
Open drain
4.
Diode is required for battery reverse charge protection.
5.
VREF only for STM1404A; VTPU for STM1404B/C
Figure 5.
Tamper pin (TP1 or TP3) normally high (NH) external hookup (switch
closed)
1.
R typical is 10 M
Ω. Resistors must be protected against conductive materials.
VCC
AI09690a
VCC
MR
VOUT
VREF
(5)
or
VTPU
VCCSW
(1)
VCC
LPSRAM
PFI
C
(2)
0.1
μF
1.0
μF
STM1404
PFO
(3)
RST
(3)
BLD
(3)
To Microprocessor Reset
Unregulated
Voltage
Regulator
VCC
VIN
R1
R2
Push-Button
From Actuator Device
(e.g., Switches, Wire Mesh)
BAT54J
(4)
VBAT
TP1
TP2
TP3
TP4
To Microprocessor NMI
To Microprocessor
SAL
(3)
To Physical Tamper Pins TPX
To ADC
AI09698a
VOUT (STM1404A)
or
VTPU (STM1404B/C)
R
(1)
Switch Normally Closed;
Tamper Detection on Open
TP1 or TP3



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