STM1404CSNDQ6F datasheet(9/35 Pages) STMICROELECTRONICS

tên linh kiện	STM1404CSNDQ6F

Giải thích chi tiết về linh kiện	3 V FIPS-140 security supervisor with battery switchover

PDF	35 Pages

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STM1404

Description

9/36

Figure 4.

Hardware hookup

Normal mode: low when VOUT is internally switched to VCC and high when VOUT is internally switched to

battery.

Capacitor (C) is typically

≥ 10 µF.

Open drain

Diode is required for battery reverse charge protection.

VREF only for STM1404A; VTPU for STM1404B/C

Figure 5.

Tamper pin (TP1 or TP3) normally high (NH) external hookup (switch

closed)

R typical is 10 M

Ω. Resistors must be protected against conductive materials.

VCC

AI09690a

VCC

VOUT

VREF

(5)

VTPU

VCCSW

(1)

VCC

LPSRAM

PFI

(2)

0.1

μF

1.0

μF

STM1404

PFO

(3)

RST

(3)

BLD

(3)

To Microprocessor Reset

Unregulated

Voltage

Regulator

VCC

VIN

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)

VTPU (STM1404B/C)

(1)

Switch Normally Closed;

Tamper Detection on Open

TP1 or TP3

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