LTC2904/LTC2905

3

29045fd

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

5V, 5% Reset Threshold

5V, 7.5% Reset Threshold

5V, 10% Reset Threshold

V1 Input Threshold

l

l

l

4.600

4.475

4.350

4.675

4.550

4.425

4.750

4.625

4.500

V

V

V

3.3V, 5% Reset Threshold

3.3V, 7.5% Reset Threshold

3.3V, 10% Reset Threshold

V1, V2 Input Threshold

l

l

l

3.036

2.954

2.871

3.086

3.003

2.921

3.135

3.053

2.970

V

V

V

2.5V, 5% Reset Threshold

2.5V, 7.5% Reset Threshold

2.5V, 10% Reset Threshold

V1, V2 Input Threshold

l

l

l

2.300

2.238

2.175

2.338

2.275

2.213

2.375

2.313

2.250

V

V

V

1.8V, 5% Reset Threshold

1.8V, 7.5% Reset Threshold

1.8V, 10% Reset Threshold

V2 Input Threshold

l

l

l

1.656

1.611

1.566

1.683

1.638

1.593

1.710

1.665

1.620

V

V

V

1.5V, 5% Reset Threshold

1.5V, 7.5% Reset Threshold

1.5V, 10% Reset Threshold

V2 Input Threshold

l

l

l

1.380

1.343

1.305

1.403

1.365

1.328

1.425

1.388

1.350

V

V

V

1.2V, 5% Reset Threshold

1.2V, 7.5% Reset Threshold

1.2V, 10% Reset Threshold

V2 Input Threshold

l

l

l

1.104

1.074

1.044

1.122

1.092

1.062

1.140

1.110

1.080

V

V

V

1V, 5% Reset Threshold

1V, 7.5% Reset Threshold

1V, 10% Reset Threshold

V2 Input Threshold

l

l

l

0.920

0.895

0.870

0.935

0.910

0.885

0.950

0.925

0.900

V

V

V

Minimum Internal Operating Voltage (Note 2) RST in Correct Logic State

l

1V

V1 Input Current

Includes Input Current to Three-State Pins

l

65

130

μA

V2 Input Current

l

0.4

1.0

μA

TMR Pull-Up Current

LTC2905

l

–1.5

–2.1

–2.7

μA

TMR Pull-Down Current

LTC2905

LTC2905H

l

l

1.5

1.4

2.1

2.0

2.7

2.7

μA

μA

Reset Timeout Period

LTC2904

l

140

200

260

ms

Reset Timeout Period

LTC2905

LTC2905H

l

l

140

140

200

260

295

ms

ms

Vx Undervoltage Detect to

RST or RST

by More than 1%

150

μs

Output Voltage Low RST, RST

I = 2.5mA

I = 100μA; V1 = 1V (RST Only)

l

l

0.15

0.05

0.4

0.3

V

V

Output Voltage High RST, RST

(Notes 2, 5)

I = –1μA

l

V

Three-State Inputs S1, S2, TOL

Low Level Input Voltage

l

0.4

V

High Level Input Voltage

l

1.4

V

Pin Voltage When Left in Open State

I = –10μA

I = 0μA

I = 10μA

l

l

0.7

0.9

1.1

V

V

V

2905H

I = –10μA

I = 0μA

I = 10μA

l

l

0.65

0.9

1.15

V

V

V

Programming Input Current (Note 6)

l

±25

μA

The

(Notes 2, 3)