54AC11109, 74AC11109
DUAL J-K POSITIVE-EDGE-TRIGGERED FLIP-FLOPS
WITH CLEAR AND PRESET
SCAS450 – MARCH 1987 – REVISED APRIL 1993
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54AC11109 . . . J PACKAGE
74AC11109 . . . D OR N PACKAGE
(TOP VIEW)
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin VCC and GND Configurations
Minimize High-Speed Switching Noise
EPIC ™ (Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity
at 125°C
ESD Protection Exceeds 2000 V,
MIL STD-883C Method 3015
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
1PRE
1Q
1Q
GND
2Q
2Q
2PRE
2CLK
1
15
3
14
4
13
5
1CLK
1K
1J
1CLR
VCC
2CLR
2J
2K
16
2
12
6
11
7
10
8
9
54AC11109 . . . FK PACKAGE
(TOP VIEW)
1J
1CLR
NC
VCC
2CLR
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description
These devices contain two independent J-K
positive-edge-triggered flip-flops. A low level at
the preset (PRE) or clear (CLR) inputs sets or
resets the outputs regardless of the levels of the
other inputs. When preset and clear are inactive
(high), data at the J and K inputs meeting the setup
time requirements are transferred to the outputs
on the positive-going edge of the clock pulse.
Clock triggering occurs at a voltage level and is not
directly related to the rise time of the clock pulse.
Following the hold time interval, data at the J and
K inputs may be changed without affecting the
levels at the outputs. These versatile flip-flops can
perform as toggle flip-flops by grounding K and
tying J high. They also can perform as D-type
flip-flops by tying the J and K inputs together.
4
17
6
16
7
15
8
14
9 10 11 12 13
2J
2K
NC
2CLK
2PRE
1Q
GND
NC
2Q
2Q
3 2 1 20 19
18
5
1K
1CLK
NC
1PRE
1Q
NC – No internal connection
The 54AC11109 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
74AC11109 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE
(each gate)
INPUTS
PRE
CLR
CLK
L
H
X
H
L
X
OUTPUTS
J
K
Q
Q
X
X
H
L
X
X
H
H†
H
L
L
X
X
X
L
H†
H
H
↑
L
L
L
H
H
↑
H
L
H
H
↑
L
H
Q0
Q0
H
H
↑
H
H
H
L
Toggle
H
H
L
X
X
Q0
Q0
† This configuration is nonstable; that is, it will not persist when
either PRE or CLR returns to its inactive (high) level.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright © 1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–1