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.

option on pin 9. On the STM1403B/C, this pin is

The STM1403 is available in three versions, corre-

Voltage Out), when the SAL (Security Alarm) is as-

serted (active-low) upon tamper detection:

when SAL is driven low (activated).

driven low (activated).

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

3. SAL, RST, PFO, and BLD are Open Drain.

Table 2. Signal Names

details.

2. SAL, RST, PFO, and BLD are Open Drain.

AI09682

STM1403

or

(1)

(2)

MR

PFI

TP1 (NH)

TP2

(NL)

TP3

(NH)

TP4

(NL)

MR

Manual (Push-button) Reset Input

PFI

Power-fail Input

Independent Physical Tamper

Detect Pins 1 through 4

Supply Voltage Output

Active-low Reset Output

Power-fail Output

Security Alarm Output

Battery Low Voltage Detect

(3)

1.237V Reference Voltage

(3)

Tamper Pull-up

Back-up Supply Voltage

Supply Voltage

Ground