NSC 5962-8762801SA, 5962-8762801RA, 5962-87628012A Datasheet
54FCT374
Octal D-Type Flip-Flop with TRI-STATE
®
Outputs
General Description
The ’FCT374 is an octal D-type flip-flop featuring separate
D-type inputs for each flip-flop and TRI-STATE outputs for
bus-oriented applications. Abuffered Clock (CP) and Output
Enable (OE) are common to all flip-flops.
Features
n Edge-triggered D-type inputs
n Buffered positive edge-triggered clock
n TRI-STATE outputs for bus-oriented applications
n TTL input and output level compatible
n Low CMOS power consumption
n Output sink capability of 32 mA, source capability of
12 mA
n Standard Microcircuit Drawing (SMD) 5962-9314901
Ordering Code
Military Package Package Description
Number
54FCT374DMQB J20A 20-Lead Ceramic Dual-In-Line
54FCT374FMQB W20A 20-Lead Cerpack
54FCT374LMQB E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagrams
TRI-STATE®is a registered trademark of National Semiconductor Corporation.
Pin Assignment for DIP
and Flatpak
DS100964-1
Pin Assignment
for LCC
DS100964-2
September 1998
54FCT374 Octal D-Type Flip-Flop with TRI-STATE Outputs
© 1999 National Semiconductor Corporation DS100964 www.national.com
Pin Descriptions
Pin Description
Names
D
0–D7
Data Inputs
CP Clock Pulse Input (Active
Rising Edge)
OE
TRI-STATE Output Enable
Input (Active LOW)
O
0–O7
TRI-STATE Outputs
Functional Description
The ’FCT374 consists of eight edge-triggered flip-flops with
individual D-type inputs and TRI-STATE true outputs. The
buffered clock and buffered Output Enable are common to all
flip-flops. The eight flip-flops will store the state of their individual D inputs that meet the setup and hold time requirements on the LOW-to-HIGH Clock (CP) transition. With the
Output Enable (OE) LOW, the contents of the eight flip-flops
are available at the outputs. When OE is HIGH, the outputs
are in a high impedance state. Operation of the OE input
does not affect the state of the flip-flops.
Function Table
Inputs Internal Outputs Function
OE
CP D Q O
H H L NC Z Hold
H H H NC Z Hold
H N L L Z Load
H N H H Z Load
L N L L L Data Available
L N H H H Data Available
L H L NC NC No Change in Data
L H H NC NC No Change in Data
H=HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial
Z=High Impedance
N=LOW-to-HIGH Transition
NC=No Change
Logic Diagram
DS100964-3
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
54FCT374
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature −65˚C to +150˚C
Ambient Temperature under Bias −55˚C to +125˚C
Junction Temperature under Bias
Ceramic −55˚C to +175˚C
V
CC
Pin Potential to
Ground Pin −0.5V to +7.0V
Input Voltage −0.5V to +7.0V
Input Current −30 mA to +5.0 mA
Voltage Applied to Any Output
in the Disabled or
Power-Off State −0.5V to +5.5V
in the HIGH State −0.5V to V
CC
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
Recommended Operating
Conditions
Free Air Ambient Temperature
Military −55˚C to +125˚C
Supply Voltage
Military +4.5V to +5.5V
Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under these
conditions is not implied.
DC Electrical Characteristics
Symbol Parameter FCT374 Units V
CC
Conditions
Min Max
V
IH
Input HIGH Voltage 2.0 V Recognized HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized LOW Signal
V
CD
Input Clamp Diode Voltage −1.2 V Min I
IN
=
−18 mA
V
OH
Output HIGH
Voltage
54FCT 4.3 V Min I
OH
=
−300 µA
54FCT 2.4 V Min I
OH
=
−12 mA
V
OL
Output LOW Voltage
54FCT 0.2 V Min I
OL
=
300 µA
54FCT 0.5 V Min I
OL
= 32mA
I
IH
Input HIGH Current 5 µA Max V
IN
=
2.7V (Note 3)
5V
IN
=
V
CC
I
IL
Input LOW Current −5 µA Max V
IN
=
0.5V (Note 3)
−5 V
IN
=
0.0V
I
OZH
Output Leakage Current 10 µA 0 − 5.5V V
OUT
=
2.7V; OE=2.0V
I
OZL
Output Leakage Current −10 µA 0 − 5.5V V
OUT
=
0.5V; OE=2.0V
I
OS
Output Short-Circuit Current −60 mA Max V
OUT
=
0.0V
I
CCQ
Power Supply Current 1.5 mA Max VIN= 0.2V or VIN= 5.3V, fI=
0MHz
∆I
CC
Power Supply Current 2.0 mA Max VIN= 3.4V
I
CCT
Additional
I
CC
/Input
6.0 mA Max V
I
=
V
CC
− 2.1V or VIN= GND, f
CP
= 10MHz, Outputs open, OE =
GND, one bit toggling at fI= 5MHz,
50%duty cycle
5.5 mA Max V
I
=
5.3V or V
CC
= 0.2V, fCP=
10MHz, Outputs open, OE = GND,
one bit toggling at fI= 5MHz, 50
%
duty cycle
I
CCD
Dynamic I
CC
No Load 0.4 mA/
MHz
Max Outputs Open, OE = GND, One bit
toggling, 50%duty cycle, VIN=
5.3V or V
IN
= 0.2V
Note 2: For 8-bit toggling, I
CCD
<
0.8 mA/MHz.
Note 3: Guaranteed, but not tested.
54FCT374
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