STM1403CTMQ6F Ver la hoja de datos (PDF) - STMicroelectronics

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STM1403CTMQ6F

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

Description

STM1403

Note:

Figure 2.

QFN16 connections

BLD(2) PFI VCCSW(1) VCC

RST(2)

MR

SAL(2)

VSS

16 15 14 13

1

12

2

11

3

10

4

5

6

7

89

VOUT

VBAT

PFO(2)

VREF or VTPU(3)

TP1 TP2 TP3 TP4

(NH) (NL) (NH) (NL)

AI09683

See Section 2: Pin descriptions on page 11 for details.

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

battery.

2. SAL, RST, PFO, and BLD are open drain.

3. VREF only for STM1403A; VTPU for STM1403B/C

Figure 3. Block diagram

VCC

BAT54J(1,2)

VBAT(1)

VSO

COMPARE

VOUT

VCCSW

VINT VRST COMPARE

MR

PFI

VPFI

COMPARE

trec

Generator

RST(3)

PFO(3)

VDET

COMPARE @

POWER-UP

1.237V VREF

Generator

BLD(3)

VTPU(4)

VREF(4)

VHV

COMPARE

VLV

TP1 (NH)

TP2 (NL)

TP3 (NH)

TP4 (NL)

COMPARE

1. BAT54J (from STMicroelectronics) recommended

2. Required for battery-reverse charging protection

3. Open drain

4. VREF only for STM1403; VTPU for STM1403B/C

SAL(3)

AI09684

8/35

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