TLF5340
MM54HC534MM74HC534
TRI-STATE
Octal
D-Type
Flip-Flop
with
Inverted
Outputs
January 1988
MM54HC534MM74HC534
TRI-STATE
Octal D-Type Flip-Flop
with Inverted Outputs
General Description
These high speed Octal D-Type Flip-Flops utilize advanced
silicon-gate CMOS technology They possess the high noise
immunity and low power consumption of standard CMOS
integrated circuits as well as the ability to drive 15 LS-TTL
loads Due to the large output drive capability and the TRI-
STATE feature these devices are ideally suited for interfac-
ing with bus lines in a bus organized system
These devices are positive edge triggered flip-flops Data at
the D inputs meeting the setup and hold time requirements
are inverted and transferred to the Q outputs on positive
going transitions of the CLOCK (CK) input When a high
logic level is applied to the OUTPUT CONTROL (OC) input
all outputs go to a high impedance state regardless of what
signals are present at the other inputs and the state of the
storage elements
The 54HC74HC logic family is speed function and pinout
compatible with the standard 54LS74LS logic family All
inputs are protected from damage due to static discharge by
internal diode clamps to VCC and ground
Features
Y
Typical propagation delay 23 ns
Y
Wide operating voltage range 2 – 6V
Y
Low input current 1 mA maximum
Y
Low quiescent current 80 mA maximum
Y
Compatible with bus-oriented systems
Y
Output drive capability 15 LS-TTL loads
Connection Diagram
Dual-In-Line Package
TLF5340 – 1
Top View
Order Number MM54HC534 or MM74HC534
Truth Table
H e High Level L e Low Level
Output
Clock
Data
Output
X e Don’t Care
Control
u e Transition from low-to-high
L
u
HL
Z e High impedance state
L
u
LH
Q0 e The level of the output before steady state
input conditions were established
LL
X
Q
HX
X
Z
TRI-STATE
is a registered trademark of National Semiconductor Corp
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A