LTC2904/LTC2905

3

sn29045 29045fs

(Notes 2, 3)

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: For reset thresholds test conditions refer to the voltage threshold

programming table in the Applications Information section.

typically –6µA. However, an external pull-up resistor may be used when

Note 6: The input current to the three-state input pins are the pull-up and

the pull-down current when the pins are either set to V1 or GND

respectively. In the open state, the maximum leakage current to V1 or GND

permissible is 10µA.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

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

●

1V

V1 Input Current

Includes Input Current to Three-State Pins

●

65

130

µA

V2 Input Current

●

0.4

1.0

µA

TMR Pull-Up Current

(LTC2905)

●

–1.5

–2.1

–2.7

µA

TMR Pull-Down Current

(LTC2905)

●

1.5

2.1

2.7

µA

Reset Time-Out Period

(LTC2904)

●

140

200

260

ms

Reset Time-Out Period

(LTC2905)

●

140

200

260

ms

Vx Undervoltage Detect to

150

µs

RST or RST

by More than 1%

Output Voltage Low RST, RST

I = 2.5mA

●

0.15

0.4

V

I = 100µA; V1 = 1V (RST Only)

●

0.05

0.3

V

Output Voltage High RST, RST

I = –1µA

V

(Notes 2, 5)

Three-State Inputs S1, S2, TOL

Low Level Input Voltage

●

0.4

V

High Level Input Voltage

●

1.4

V

Pin Voltage when Left in Open State

I = –10µA

●

0.7

V

I = 0µA

0.9

V

I = 10µA

●

1.1

V

Programming Input Current (Note 6)

●

±25

µA