UT54ACS191E datasheet(8/12 Pages) AEROFLEX

8 / 12 page

36-00-04-001

Ver. 1.0.0

Aeroflex Microelectronics Solutions - HiRel

Notes:

1. Maximum allowable relative shift equals 50mV.

2. For devices procured with a total ionizing dose tolerance guarantee, the post-irradiation performance is guaranteed at 25°C per MIL-STD-883 method 1019 condition

A up to the maximum TID level procured.

3. Maximum clock frequency fMAX is the max rate at which the device will count up or down at the given voltage. However, the user must wait the appropriate

UP-to-Qn or Down-to-Qn propagation delay time in order to observe the current counter value.

tPHL8

CTEN to RCO

CL = 50pF

4.5V to 5.5V

3.0V to 3.6V

fMAX

Maximum clock frequency

CL = 50pF

3.0V to 5.5V

MHz

tSU1

D/U setup time before CLK

↑

CL = 50pF

4.5V to 5.5V

3.0V to 3.6V

tSU2

CTEN low setup time before CLK

↑

CL = 50pF

4.5V to 5.5V

3.0V to 3.6V

tSU3

A, B, C, D setup time before

LOAD

↑

CL = 50pF

4.5V to 5.5V

3.0V to 3.6V

tSU4

LOAD high setup time before

CLK

↑

CL = 50pF

4.5V to 5.5V

3.0V to 3.6V

tH1

D/U hold time after CLK

↑

CL = 50pF

3.0V to 5.5V

tH2

CTEN low hold time after CLK

↑

CL = 50pF

4.5v to 5.5V

3.0V to 3.6V

tH3

A, B, C, D hold time after LOAD

↑

CL = 50pF

3.0V to 5.5V

Minimum pulse width

CLK high or low

LOAD low

CL = 50pF

3.0V to 5.5V

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