74HC109 Philips, 74HC109 Datasheet - Page 4

• Manufacturer Part Number: 74HC109
• Description: Dual JK flip-flop with set and reset positive-edge trigger
• Manufacturer: Philips

Philips Semiconductors
PACKAGE OUTLINES
See
1997 Nov 25
handbook, full pagewidth
Fig.4 Functional diagram.
Dual JK flip-flop with set and reset;
positive-edge trigger
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
CP
R
K
S
J
Fig.5 Logic diagram (one flip-flop).
FUNCTION TABLE
Notes
1. H = HIGH voltage level
asynchronous set
asynchronous reset
undetermined
toggle
load “0” (reset)
load “1” (set)
hold “no change”
OPERATING
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition
q = lower case letters indicate the state of the referenced output one set-up time
prior to the LOW-to-HIGH CP transition
X = don’t care
C
C
= LOW-to-HIGH CP transition
MODE
C
C
C
C
.
S
H
H
H
H
H
L
L
4
D
R
H
H
H
H
H
L
L
D
C
C
INPUTS
CP
X
X
X
C
C
X
X
X
J
h
h
l
l
MBK217
K
X
X
X
h
h
l
l
74HC/HCT109
Product specification
OUTPUTS
Q
H
H
H
L
q
L
q
Q
Q
Q
H
H
H
L
q
L
q