August 2008

Rev 5

1/35

1

STM1403

3 V FIPS-140

security supervisor with battery switchover

Features

–Four high-impedance physical tamper

inputs

– Over/under operating voltage detector

– Security alarm (SAL) on tamper detection

– Automatic battery switchover

–RST output (open drain)

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

– Power-fail comparator (PFI/PFO)

indicator)

– (Available for STM1403A only)

package

QFN16, 3 mm x 3 mm (Q)

Table 1.

Device summary

Device

Standard

supervisory

Physical

tamper

inputs

Over/under

voltage

alarms

(1.237 V)

option

during alarm

Vccsw status,

during alarm

STM1403A

✔✔

✔

✔

ON

✔✔

✔

High-Z

High

STM1403C

✔✔

✔

Note(4)

Ground

High

1.

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

2.

3.

Contact local ST sales office for availability.

4.

www.st.com