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. A buffered 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-T
ype
Flip-Flop
with
TRI-ST
A
T
E
Outputs
1999 National Semiconductor Corporation
DS100964
www.national.com
Pin Descriptions
Pin
Description
Names
D
0
D
7
Data Inputs
CP
Clock Pulse Input (Active
Rising Edge)
OE
TRI-STATE Output Enable
Input (Active LOW)
O
0
O
7
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 indi-
vidual D inputs that meet the setup and hold time require-
ments 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
www.national.com
2
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
-65C to +150C
Ambient Temperature under Bias
-55C to +125C
Junction Temperature under Bias
Ceramic
-55C to +175C
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
-55C to +125C
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 A
54FCT
2.4
V
Min
I
OH
= -12 mA
V
OL
Output LOW Voltage
54FCT
0.2
V
Min
I
OL
= 300 A
54FCT
0.5
V
Min
I
OL
= 32mA
I
IH
Input HIGH Current
5
A
Max
V
IN
= 2.7V (Note 3)
5
V
IN
= V
CC
I
IL
Input LOW Current
-5
A
Max
V
IN
= 0.5V (Note 3)
-5
V
IN
= 0.0V
I
OZH
Output Leakage Current
10
A
0 - 5.5V
V
OUT
= 2.7V; OE = 2.0V
I
OZL
Output Leakage Current
-10
A
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
V
IN
= 0.2V or V
IN
= 5.3V, f
I
=
0MHz
I
CC
Power Supply Current
2.0
mA
Max
V
IN
= 3.4V
I
CCT
Additional
I
CC
/Input
6.0
mA
Max
V
I
= V
CC
- 2.1V or V
IN
= GND, f
CP
= 10MHz, Outputs open, OE =
GND, one bit toggling at f
I
= 5MHz,
50% duty cycle
5.5
mA
Max
V
I
= 5.3V or V
CC
= 0.2V, f
CP
=
10MHz, Outputs open, OE = GND,
one bit toggling at f
I
= 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, V
IN
=
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
www.national.com
3
AC Electrical Characteristics
Symbol
Parameter
54FCT
Units
T
A
= -55C to +125C
V
CC
= 4.5V to 5.5V
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
2.0
11.0
ns
t
PHL
CP to O
n
2.0
11.0
t
PZH
Output Enable Time
1.5
14.0
ns
t
PZL
1.5
14.0
t
PHZ
Output Disable Time
1.5
8.0
ns
t
PLZ
1.5
8.0
AC Operating Requirements
54FCT
T
A
= -55C to +125C
Symbol
Parameter
V
CC
= 4.5V to 5.5V
Units
C
L
= 50 pF
Min
Max
t
s
(H)
Setup Time, HIGH
2.5
ns
t
s
(L)
or LOW D
n
to CP
2.5
t
h
(H)
Hold Time, HIGH
2.5
ns
t
h
(L)
or LOW D
n
to CP
2.5
t
w
(H)
Pulse Width, CP
7.0
ns
t
w
(L)
HIGH or LOW
7.0
Capacitance
Symbol
Parameter
Typ
Units
Conditions (T
A
= 25C)
C
IN
Input Capacitance
5.0
pF
V
CC
= 0V
C
OUT
(Note 4)
Output Capacitance
9.0
pF
V
CC
= 5.0V
Note 4: C
OUT
is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
54FCT374
www.national.com
4
Capacitance
(Continued)
AC Loading
DS100964-4
*
Includes jig and probe capacitance
FIGURE 1. Standard AC Test Load
DS100964-6
FIGURE 2. V
M
= 1.5V
Input Pulse Requirements
Amplitude
Rep. Rate
t
w
t
r
t
f
3.0V
1 MHz
500 ns
2.5 ns
2.5 ns
FIGURE 3. Test Input Signal Requirements
DS100964-8
FIGURE 4. Propagation Delay Waveforms for
Inverting and Non-Inverting Functions
DS100964-5
FIGURE 5. Propagation Delay,
Pulse Width Waveforms
DS100964-7
FIGURE 6. TRI-STATE Output HIGH
and LOW Enable and Disable Times
DS100964-9
FIGURE 7. Setup Time, Hold Time
and Recovery Time Waveforms
54FCT374
www.national.com
5
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Terminal Ceramic Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line (D)
NS Package Number J20A
54FCT374
www.national.com
6
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
LIFE SUPPORT POLICY
NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: support@nsc.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 1 80-530 85 85
English
Tel: +49 (0) 1 80-532 78 32
Franais Tel: +49 (0) 1 80-532 93 58
Italiano
Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: sea.support@nsc.com
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
www.national.com
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
54FCT374
Octal
D-T
ype
Flip-Flop
with
TRI-ST
A
T
E
Outputs
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
PDF 
ZIP