3

LTC2908

sn2908 2908fs

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Internal Operating Voltage

RST in Correct Logic State

●

0.5

6

V

V1 Input Current

V1 = 5.0V (LTC2908-A1) (Note 4)

●

26

50

µA

V1 = 3.3V (LTC2908-B1)

●

24

50

µA

V2 Input Current

V2 = 3.3V (LTC2908-A1) (Note 4)

●

10

20

µA

V2 = 2.5V (LTC2908-B1)

●

820

µA

V3 Input Current

V3 = 2.5V (LTC2908-A1)

●

25

µA

V3 = 1.8V (LTC2908-B1)

●

25

µA

V4 Input Current

V4 = 1.8V (LTC2908-A1)

●

25

µA

V4 = 1.5V (LTC2908-B1)

●

25

µA

●

±15

nA

Reset Time-Out Period

●

160

200

260

ms

250

µs

More Than 1%

Output Voltage High RST (Note 5)

V

V

Output Voltage Low RST

●

0.01

0.15

V

●

0.01

0.15

V

●

0.10

0.30

V

The

otherwise noted. (Notes 2, 3)

ELECTRICAL CHARACTERISTICS

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 3: All currents into pins are positive; all voltages are referenced to

GND unless otherwise noted.

Note 4: Under typical operating conditions, most of the quiescent current

is drawn from the V1 input. When V2 exceeds V1, V2 supplies most of the

quiescent current.

However, an external pull-up resistor may be used when a faster rise time

TYPICAL PERFOR A CE CHARACTERISTICS

5V Threshold Voltage

vs Temperature

3.3V Threshold Voltage

vs Temperature

2.5V Threshold Voltage

vs Temperature

TEMPERATURE (°C)

–50

4.750

4.725

4.700

4.675

4.650

4.625

4.600

25

75

2908 G01

–25

0

50

100

TEMPERATURE (°C)

–50

3.135

3.115

3.095

3.075

3.055

3.035

25

75

2908 G02

–25

0

50

100

TEMPERATURE (°C)

–50

2.375

2.360

2.345

2.330

2.315

2.300

25

75

2908 G03

–25

0

50

100