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STM1404

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

Description

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Description

STM1404

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The STM1404 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.

STM1404 will target the highest security level 4 and include both physical and

environmental (voltage and temperature) monitoring.

The STM1404 include automatic battery switchover, RST output (open drain), manual

(push-button) reset input (MR), power-fail comparator (PFI/PFO), physical and/or

environmental tamper detect/security alarm, and battery low voltage detect features.

The STM1404A also offers a VREF (1.237V) as an option on pin 9. On STM1404B/C this pin

is VTPU (internally switched VCC or VBAT).

VOUT pin modes

The STM1404 is available in three versions, corresponding to three modes of the VOUT pin

(supply voltage out), when the SAL (security alarm) is asserted (active-low) upon tamper

detection:

STM1404A

VOUT stays ON (at VCC or VBAT) when SAL is driven low (activated).

STM1404B

VOUT is set to High-Z when SAL is driven low (activated).

STM1404C

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 summary) are pin-compatible and available in a security-

friendly, low profile, 16-pin QFN package.

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