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STM1403CSN-Q6F Datasheet(PDF) 2 Page - STMicroelectronics |
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STM1403CSN-Q6F Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 9 page  STM1403 2/9 SUMMARY 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 phys- ical and/or environmental intrusion monitoring requirements as mandated by various standards, such as Federal Information Processing Stan- dards (FIPS) Pub 140 entitled “Security Require- ments for Cryptographic Modules,” published by the National Institute of Standards and Technolo- gy, U.S. Department of Commerce), EMVCo, ISO, ZKA, and VISA PED. STM1403 supports target levels 3 and lower The STM1403 includes Automatic Battery Switchover, RST Output (Open Drain), Manual (Push-button) Reset Input (MR), Power-fail Com- parator (PFI/PFO), Physical and/or Environmental Tamper Detect/Security Alarm, and Battery Low Voltage Detect features. The STM1403A also offers a VREF (1.237V) as an option on pin 9. On the STM1403B/C, this pin is VTPU (internally switched VCC or VBAT). VOUT Pin Modes The STM1403 is available in three versions, corre- sponding to three modes of the VOUT pin (Supply Voltage Out), when the SAL (Security Alarm) is as- serted (active-low) upon tamper detection: STM1403A. VOUT stays ON (at VCC or VBAT) when SAL is driven low (activated). STM1403B. VOUT is set to High-Z when SAL is driven low (activated). STM1403C. VOUT is driven to Ground when SAL is activated (may be used when VOUT is connected directly to the VCC pin of the external SRAM that holds the cryptographic codes). All variants (see Table 1., Device Options) are pin- compatible and available in a security-friendly, low profile, 16-pin QFN package. Figure 2. Logic Diagram Note: 1. VREF only for STM1403A; VTPU for STM1403B/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. Signal Names Note: See PIN DESCRIPTIONS, page 9 of the full datasheet for details. 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 STM1403A; VTPU for STM1403B/C. AI09682 VCC VBAT STM1403 VSS VOUT VREF or VTPU (1) VCCSW (2) MR SAL(3) BLD(3) PFI TP1 (NH) TP2 (NL) TP3 (NH) TP4 (NL) PFO(3) RST(3) Vccsw(1) VCC Switch Output MR Manual (Push-button) Reset Input PFI Power-fail Input TP1 - TP4 Independent Physical Tamper Detect Pins 1 through 4 VOUT Supply Voltage Output RST(2) Active-low Reset Output PFO(2) Power-fail Output SAL(2) Security Alarm Output BLD(2) Battery Low Voltage Detect VREF (3) 1.237V Reference Voltage VTPU (3) Tamper Pull-up (VCC or VBAT) VBAT Back-up Supply Voltage VCC Supply Voltage VSS Ground |
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