LT685 datasheet(4/8 Pages) LINER

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LT685

LT685C

LT685M

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

tPD

Propagation Delay

TA = 25°C

4.5

5.5

6.5

4.5

5.5

6.5

(Note 4)

TA = TMAX

5.0

9.5

5.5

TA = TMIN

4.0

6.5

3.5

6.5

tPD(E)

Latch Enable to

TA = 25°C

4.5

5.5

6.5

4.5

5.5

6.5

Output Delay

TA = TMAX

5.0

9.5

5.5

(Note 3)

TA = TMIN

4.0

6.5

3.5

6.5

Minimum Set-Up Time

TMIN ≤ TA ≤ 25°C

3.0

(Note 3)

TA = TMAX

4.0

6.0

Minimum Hold Time

TMIN ≤ TA ≤ TMAX

1.0

(Note 3)

tPW(E)

Minimum Latch Enable

TMIN ≤ TA ≤ 25°C

3.0

Pulse Width (Note 3)

TA = TMAX

4.0

5.0

(VIN = 100mV step, 5mV overdrive)

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

of a device may be impaired.

Note 2: For the metal can package, derate at 6.8mW/°C for operation at

ambient temperatures above 100°C; for the hermetic dual-in-line package,

derate at 9mW/°C for operation at ambient temperatures above 105°C.

Note 3: Guaranteed by design, but not tested.

Note 4: Sample tested at 25°C only.

Definitions:

tPD: The propagation delay measured from the time the input signal

crosses the input offset voltage to the 50% point of the output transition.

tPD(E): The propagation delay measured from the 50% point of the latch

enable signal positive transition to the 50% point of the output transition.

tS: The minimum time before the negative transition of the latch enable

signal that an input signal change must be present in order to be acquired

and held at the outputs.

tH: The minimum time after the negative transition of the latch enable

signal that the input signal must remain unchanged in order to be acquired

and held at the outputs.

tPW (E): The minimum time that the latch enable signal must be HIGH in

order to acquire and hold an input signal change.

SWITCHI G CHARACTERISTICS

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