MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

3–1

REV 2

12/93

Differential Clock D FlipFlop

The MC10EL/100EL51 is a differential clock D flip-flop with reset. The

device is functionally similar to the E151 device with higher performance

capabilities. With propagation delays and output transition times

significantly faster than the E151 the EL51 is ideally suited for those

applications which require the ultimate in AC performance.

The reset input is an asynchronous, level triggered signal. Data enters

the master portion of the flip-flop when the clock is LOW and is

transferred to the slave, and thus the outputs, upon a positive transition of

the clock. The differential clock inputs of the EL51 allow the device to be

used as a negative edge triggered flip-flop.

The differential input employs clamp circuitry to maintain stability under

open input (pulled down to VEE) conditions.

1

2

3

4

5

6

7

8

Q

VEE

VCC

LOGIC DIAGRAM AND PINOUT ASSIGNMENT

D

Q

CLK

CLK

R

D

R

Flip-Flop

MC10EL51

MC100EL51

TRUTH TABLE

D

L

H

X

R

L

L

H

CLK

Z

Z

X

Q

L

H

L

Z = LOW to HIGH Transition

1

8

D SUFFIX

PLASTIC SOIC PACKAGE

CASE 751-05