STM1403

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 t(s – Security alarm (SAL) on tamper detection c ■ Supervisory functions du – Automatic battery switchover ro – RST output (open drain) P – Manual (push-button) reset input (MR) te – Power-fail comparator (PFI/PFO) le ■ Vccsw (VCC switch output) o – Low when switched to VCC bs – High when switched to VBAT (BATT ON indicator) - O ■ Battery low voltage detector (power-up) t(s) ■ Optional VREF (1.237 V) – (Available for STM1403A only) uc ■ Low battery supply current (2.8 µA, typ) d ■ Secure low profile 16-pin, 3 x 3 mm, QFN ro package QFN16, 3 mm x 3 mm (Q) lete P Table 1. Device summary ObsoDevice 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. November 2010 Doc ID 13232 Rev 6 1/34 www.s...