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SCAS150 − APRIL 1991 − REVISED APRIL 1993
DW OR N PACKAGE
(TOP VIEW)
• Contains Six D-Type Flip-Flops
• Clock Enable Latched to Avoid False
Clocking
1Q
2Q
3Q
GND
GND
GND
GND
4Q
CLKEN
1D
2D
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
• Applications Include: Buffer/Storage
Registers, Shift Registers, Pattern
Generators
3D
• Flow-Through Architecture Optimizes PCB
V
CC
Layout
V
CC
• Center-Pin V
and GND Pin Configurations
Minimize High-Speed Switching Noise
CC
4D
13 5D
12 6D
• EPIC (Enhanced-Performance Implanted
5Q
6Q
CMOS) 1-µm Process
11
CLK
• 500-mA Typical Latch-Up Immunity at 125°C
• Package Options Include Plastic
Small-Outline Packages, and Standard
Plastic 300-mil DIPs
description
These circuits are positive-edge-triggered D-type flip-flops with a clock-enable input. Information at the D inputs
meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse
if the clock-enable input (CLKEN) is low.
Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the
positive-going pulse. When the clock inputs are at either the high or low level, the data (D) input signal has no
effect at the output. The circuits are designed to prevent false clocking by transitions at the clock-enable
(CLKEN) input.
The 74AC11378 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
CLKEN
CLK
D
Q
H
X
X
Q
O
L
L
↑
↑
L
H
L
H
L
X
X
Q
O
EPIC is a trademark of Texas Instruments Incorporated.
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Copyright 1993, Texas Instruments Incorporated
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1
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