STM1403CTMQ6F Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

STM1403CTMQ6F

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

STM1403

Figure 4. Hardware hookup

Description

Unregulated

Voltage

Regulator

VIN VCC

VCCSW(1)

VCC

VOUT

0.1μF

STM1403

R1

PFI

PFO(3)

R2

Push-Button

MR

RST(3)

BAT54J(4)

VBAT

BLD(3)

1.0μF

VCC

VCC

C(2)

LPSRAM

To Microprocessor NMI

To Microprocessor Reset

To Microprocessor

From Actuator Device

(e.g., Switches, Wire Mesh)

TP1

TP2

SAL(3)

TP3

TP4

VREF(5)

or

VTPU

To ADC

To Physical Tamper Pins TPX

AI09690

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 STM1403; VTPU for STM1403B/C.

Figure 5. Tamper pin (TP1 or TP3) normally high (NH) external hookup (switch

closed)

VOUT (STM1403A)

or

VTPU (STM1403B/C)

Switch Normally Closed;

Tamper Detection on Open

R(1)

TP1 or TP3

AI09698

1. R typical is 10 MΩ. Resistors must be protected against conductive materials.

9/35

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