STM1403A Просмотр технического описания (PDF) - STMicroelectronics

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STM1403A

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

STM1403

3 V FIPS-140

security supervisor with battery switchover

Features

■ STM1403 supports FIPS-140 security level 3+

– Four high-impedance physical tamper

inputs

– Over/under operating voltage detector

– Security alarm (SAL) on tamper detection

■ Supervisory functions

– Automatic battery switchover

– RST output (open drain)

– Manual (push-button) reset input (MR)

– Power-fail comparator (PFI/PFO)

■ Vccsw (VCC switch output)

– Low when switched to VCC

– High when switched to VBAT (BATT ON

indicator)

■ Battery low voltage detector (power-up)

■ Optional VREF (1.237 V)

– (Available for STM1403A only)

■ Low battery supply current (2.8 µA, typ)

■ Secure low profile 16-pin, 3 x 3 mm, QFN

package

QFN16, 3 mm x 3 mm (Q)

Table 1. Device summary

Device

Standard

supervisory

functions(1)

Physical

tamper

inputs

Over/under

voltage

alarms

VREF

(1.237 V)

option

VOUT status,

during alarm

Vccsw status,

during alarm

STM1403A

✔

STM1403B(3)

✔

STM1403C

✔

✔

✔

✔

ON

Normal mode(2)

✔

✔

Note(4)

High-Z

High

✔

✔

Note(4)

Ground

High

1. Reset output, power-fail comparator, battery low detection (SAL, RST, PFO, and BLD are open drain).

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

3. Contact local ST sales office for availability.

4. Pin 9 is the VREF pin for STM1403A. It is the VTPU pin for STM1403B/C.

August 2008

Rev 5

1/35

www.st.com

1

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