TL/F/9567
54F/74F574
Octal
D-Type
Flip-Flop
with
TRI-STATE
Outputs
May 1995
54F/74F574
Octal D-Type Flip-Flop with TRI-STATE Outputs
General Description
The ’F574 is a high-speed, low power octal flip-flop with a
buffered common Clock (CP) and a buffered common Out-
put Enable (OE). The information presented to the D inputs
is stored in the flip-flops on the LOW-to-HIGH Clock (CP)
transition.
This device is functionally identical to the ’F374 except for
the pinouts.
Features
Y
Inputs and outputs on opposite sides of package
allowing easy interface with microprocessors
Y
Useful as input or output port for microprocessors
Y
Functionally identical to ’F374
Y
TRI-STATE outputs for bus-oriented applications
Commercial Military
Package
Package Description
Number
74F574PC N20A 20-Lead (0.300 Wide) Molded Dual-In-Line
54F574DM (Note 2) J20A 20-Lead Ceramic Dual-In-Line
74F574SC (Note 1) M20B 20-Lead (0.300 Wide) Molded Small Outline, JEDEC
74F574SJ (Note 1) M20D 20-Lead (0.300 Wide) Molded Small Outline, EIAJ
54F574FM (Note 2) W20A 20-Lead Cerpack
54F574LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13 reel. Use suffix e SCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbols
TL/F/9567–1
IEEE/IEC
TL/F/9567–4
Unit Loading/Fan Out
54F/74F
Pin Names Description
U.L. Input I
IH
/I
IL
HIGH/LOW Output I
OH
/I
OL
D
0
–D
7
Data Inputs 1.0/1.0 20 mA/b0.6 mA
CP Clock Pulse Input (Active LOW) 1.0/1.0 20 mA/b0.6 mA
OE TRI-STATE Output Enable Input (Active LOW) 1.0/1.0 20 mA/b0.6 mA
O
0
–O
7
TRI-STATE Outputs 150/40 (33.3) b3 mA/24 mA (20 mA)
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.