STM1404CSOJQ6 查看數據表（PDF） - STMicroelectronics

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STM1404CSOJQ6

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

STM1404

DC and AC parameters

Table 6. DC and AC characteristics (continued)

Alter-

Sym

native

Description

Test condition(1)

VOHB

VOH battery backup

(Vccsw)

ISOURCE = 100 µA

Pull-up supply voltage

(open drain)

RST, SAL, BLD, PFO

Power-fail comparator

VPFI

PFI input threshold PFI falling (VCC < 3.6 V)

PFI hysteresis

PFI rising (VCC < 3.6 V)

tPFD

PFI to PFO

propagation delay

Battery switchover

Power- VBAT > VSW

Battery backup

down

VBAT < VSW

switchover voltage (6)(7)

VBAT > VSW

VSO

Power-up

VBAT < VSW

VSW

Hysteresis

Battery low voltage detect

VDET

M

Battery detect

threshold

On power-

up only

N

O

Voltage reference (option for STM1404A)(8)

VREF

Voltage reference (see

Section 2.9: VREF,

reference voltage

output (1.237, typ) on

page 13)

0°C to 85°C

–40° to 0°C

IREF+

Source current

0°C to 85°C

–40° to 0°C

IREF–

Vn

Sink current

Output voltage noise

f = 100 Hz to 100 kH

Min

0.8VBAT

1.212

2.25

2.45

3.14

1.212

1.200

15

10

10

Typ

Max Unit

V

3.6

V

1.237

10

2

1.262 V

20

mV

µs

VSW

V

VBAT

V

VSW

V

VBAT

V

2.4

V

40

mV

2.30

2.34

V

2.50

2.55

V

3.20

3.26

V

1.237

1.262 V

1.237

1.274 V

25

15

13

10-100

µA

µA

µA

µVrms

27/36

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