STM1404BRMBQ6 Просмотр технического описания (PDF) - STMicroelectronics

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STM1404BRMBQ6

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

STM1404

Figure 1. Logic diagram

VREF

BLD(3) or

VTPU(1)

VBAT

VCC

VCCSW(2)

MR

PFI

TP1 (NH)

STM1404

VOUT

RST(3)

PFO(3)

SAL(3)

Description

Note:

TP2 TP3 TP4 VSS

(NL) (NH) (NL)

AI09682a

1. VREF only for STM1404A; VTPU for STM1404B/C.

2. Normal mode: low when VOUT is internally switched to VCC and High when VOUT is internally switched to

battery.

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

Table 2.

Vccsw(1)

MR

Signal names

VCC switch output

Manual (push-button) reset input

PFI

Power-fail input

TP1 - TP4

VOUT

RST(2)

PFO(2)

SAL(2)

BLD(2)

VREF(3)

VTPU(3)

VBAT

VCC

VSS

Independent physical tamper detect pins 1 through 4

Supply voltage output

Active-low reset output

Power-fail output

Security alarm output

Battery low voltage detect

1.237 V reference voltage

Tamper pull-up (VCC or VBAT)

Backup supply voltage

Supply voltage

Ground

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 STM1404A; VTPU for STM1404B/C.

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

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