Description
The STM1403 family of security supervisors are a low power family of intrusion (tamper) detection chips targeted at manufacturers of POS terminals and other systems, to enable them to meet physical and/or environmental intrusion monitoring requirements as mandated by various standards, such as Federal Information Processing Standards (FIPS) Pub 140 entitled “Security Requirements for Cryptographic Modules,” published by the National Institute of Standards and Technology, U.S. Department of Commerce), EMVCo, ISO, ZKA, and VISA PED. STM1403 supports target levels 3 and lower.

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