STM1404C View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM1404C

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

STM1404

3 V FIPS-140

security supervisor with battery switchover

Features

■ STM1404 supports FIPS-140 security level 4

– Four high-impedance physical tamper

inputs

– Over/under operating voltage detector

– Security alarm (SAL) on tamper detection

– Over/under operating temperature detector

– Over/under temperature thresholds are

customer-selectable and factory-

programmed

■ 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)

QFN16, 3 mm x 3 mm (Q)

■ Optional VREF (1.237 V)

– (Available for STM1404A only)

■ Low battery supply current (5.3 µA typ)

■ Secure low profile 16-pin, 3 x 3 mm, QFN

package

■ RoHS compliance

– Lead-free components compliant with the

RoHS directive

Table 1. Device summary

Device

Standard

supervisory

functions(1)

Physical

tamper

inputs

Over/under

voltage

alarms

Over/under VREF

temperature (1.237 V)

alarms option

VOUT status,

during alarm

Vccsw status,

during alarm

STM1404A

✔

STM1404B(3)

✔

STM1404C

✔

✔

✔

✔

✔

✔

✔

✔

✔

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 STM1404A. It is the VTPU pin for STM1404B/C.

August 2008

Rev 5

1/36

www.st.com

1

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