STM1404 查看數據表（PDF） - STMicroelectronics

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STM1404

3 V FIPS-140 security supervisor with battery switchover

STMicroelectronics 

STM1404

DC and AC parameters

Figure 26. STM1404 switchover diagram, condition A (VBAT < VSW)

VCC = 3.3V

VRST

VSW = 2.4V

VBAT

VBAT – 75mV

VOUT

VBAT – 35mV

AI10463

Figure 27. STM1404 switchover diagram, condition B (VBAT > VSW)

VCC = 3.3V

VBAT

VSW = 2.4V

VOUT

VSW + 40mV

AI10464

Table 6. DC and AC characteristics

Alter-

Sym

native

Description

Test condition(1)

VCC,

VBAT(2)

ICC

IBAT(3)

VOUT1

VOUT2

VTPU1

Operating voltage

TA = –40 to +85°C

VCC supply current

(STM1404A)

VCC supply current

(STM1404B,C)

Typ @ 3.3 V, 25°C

VCC supply current in

battery backup mode

VBAT supply current in

battery backup mode

VOUT voltage (active)

VOUT voltage

(battery

backup)

Internal switched

supply voltage (active)

Excluding IOUT

(VBAT = 2.3 V, VCC = 2.0

V, MR = VCC)

Excluding IOUT

(VBAT = 3.6 V)

IOUT1 = 5 mA(4)

(VCC > VSW)

IOUT1 = 80 mA

(VCC > VSW)

IOUT1 = 250 µA,

VCC > VSW(4)

IOUT2 = 250 µA,

VBAT = 2.2 V

IOUT2 = 1 mA,

VBAT = 2.2 V

ISOURCE = 5 mA

(VCC > VSW)

Min

Typ

2.2

50

35

25

5.3

VCC – 0.03

VCC –

0.015

VCC – 0.3 VCC – 0.15

VCC –

0.0015

VCC –

0.0006

VBAT – 0.1 VBAT – 0.04

VBAT – 0.16

VCC – 0.3

Max

3.6

65

50

35

8.0

Unit

V

µA

µA

µA

µA

V

V

V

V

V

V

25/36

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