LTC694IN8-3.3-PBF 查看數據表（PDF） - Linear Technology

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LTC694IN8-3.3-PBF

3.3V Microprocessor Supervisory Circuits

Linear Technology 

LTC694-3.3/LTC695-3.3

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, VBATT = 2V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Battery Back-Up Switching

Operating Voltage Range

VOUT Output Voltage

VOUT in Battery Back-Up Mode

Supply Current (Exclude IOUT)

VCC

VBATT

IOUT = 1mA

IOUT = 50mA

IOUT = 250μA, VCC < VBATT

IOUT ≤ 50μA, VCC = 3.6V

l

3.0

l

1.5

5.50

V

2.75

V

VCC – 0.1

VCC – 0.01

V

l VCC – 0.2

VCC – 0.01

V

l VCC – 0.8

VCC – 0.4

V

l VBATT – 0.1 VBATT – 0.02

V

0.2

0.6

mA

l

0.2

1.0

mA

Supply Current in Battery Back-Up Mode

VCC = 0V, VBATT = 2V

l

0.04

1

μA

0.04

5

μA

Battery Standby Current (+ = Discharge, – = Charge) 3.6V > VCC > VBATT + 0.2V

–0.02

l

–0.10

0.02

μA

0.10

μA

Battery Switchover Threshold (VCC – VBATT)

Power-Up

Power-Down

70

mV

50

mV

Battery Switchover Hysteresis

20

mV

BATT ON Output Voltage (Note 4)

BATT ON Output Short-Circuit Current (Note 4)

ISINK = 800μA

BATT ON = VOUT, Sink Current

BATT ON = 0V, Source Current

l

l

0.5

0.3

V

25

mA

1

25

μA

Reset and Watchdog Timer

Reset Voltage Threshold

l

2.8

2.9

3.0

V

Reset Threshold Hysteresis

40

mV

Reset Active Time

OSC SEL HIGH, VCC = 3V

160

l

140

200

240

ms

200

280

ms

Watchdog Timeout Period, Internal Oscillator

Long Period, VCC = 3V

1.2

l

1.0

1.6

2.0

sec

1.6

2.25

sec

Short Period, VCC = 3V

80

l

70

100

120

ms

100

140

ms

Watchdog Timeout Period, External Clock (Note 5)

Reset Active Time PSRR

Long Period, VCC = 3V

Short Period, VCC = 3V

l

4032

l

960

4097

Clock

1025

Cycles

4

ms/V

Watchdog Timeout Period PSRR, Internal OSC

Short Period

Long Period

2

ms/V

32

ms/V

Minimum WDI Input Pulse Width

RESET Output Vo_ltage at VCC = 1V

RESET and LOW LINE Output Voltage (Note 4)

RESET and WDO Output Voltage (Note 4)

_

RESET, RESET, WDO, LOW LINE

Output Short-Circuit Current (Note 4)

VIL = 0.4V, VIH = 3V

ISINK = 10μA, VCC = 1V

ISINK = 400μA, VCC = 2.8V

ISOURCE = 0.1μA, VCC = 3V

ISINK = 400μA, VCC = 3V

ISOURCE = 0.1μA, VCC = 2.8V

Output Source Current

Output Sink Current

l

200

l

l

l

2.3

l

l

2.3

l

1

ns

4

200

mV

0.3

V

V

0.3

V

V

3

25

μA

9

mA

WDI Input Threshold

Logic Low

Logic High

l

l

2.3

0.4

V

V

WDI Input Current

WDI = VOUT

WDI = 0V

l

l

–50

4

50

μA

–8

μA

69453fb

4

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