STM1403_08 Datasheet, PDF (1/34 Pages) STMicroelectronics – 3 V FIPS-140 security supervisor with battery switchover

STM1403
3 V FIPS-140
security supervisor with battery switchover
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 (V_CC switch output)
– Low when switched to V_CC
– High when switched to V_BAT (BATT ON
indicator)
■ Battery low voltage detector (power-up)
■ Optional V_REF (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
QFN16, 3 mm x 3 mm (Q)
Table 1. Device summary
Device
Standard
supervisory
functions⁽¹⁾
Physical
tamper
inputs
Over/under
voltage
alarms
V_REF
(1.237 V)
option
V_OUT status,
during alarm
Vccsw status,
during alarm
STM1403A
✔
STM1403B⁽³⁾
✔
STM1403C
✔
✔
✔
✔
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 V_OUT is internally switched to V_CC and high when V_OUT is internally switched to battery.
3. Contact local ST sales office for availability.
4. Pin 9 is the V_REF pin for STM1403A. It is the V_TPU pin for STM1403B/C.
August 2008
Rev 5
1/35
www.st.com
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