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參數(shù)資料
| 型號： | STM1404ATNDQ6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數(shù)： | 1/35頁 |
| 文件大小： | 366K |
| 代理商： | STM1404ATNDQ6F |
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August 2008
Rev 5
1/36
1
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)
■ Optional VREF (1.237 V)
– (Available for STM1404A only)
■ Low battery supply current (5.3 A typ)
■ Secure low profile 16-pin, 3 x 3 mm, QFN
package
■ RoHS compliance
– Lead-free components compliant with the
RoHS directive
QFN16, 3 mm x 3 mm (Q)
Table 1.
Device summary
Device
Standard
supervisory
functions(1)
Physical
tamper
inputs
Over/under
voltage
alarms
Over/under
temperature
alarms
VREF
(1.237 V)
option
VOUT status,
during alarm
Vccsw status,
during alarm
STM1404A
ON
Normal mode(2)
STM1404B(3)
Note(4)
High-Z
High
STM1404C
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.
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