Philips
Semiconductors
74LVC74A
Dual D-type flip-flop with set and reset;
positive-edge trigger
Product specification
IC24 Data Handbook
1998 Jun 17
INTEGRATED CIRCUITS
Philips Semiconductors
Product Specification
74LVC74A
Dual D-type flip-flop with set and reset;
positive-edge trigger
2
1998 Jun 17
853-2070 19589
FEATURES
Wide supply voltage range of 1.2 V to 3.6 V
In accordance with JEDEC standard no. 8-1A.
Inputs accept voltages up to 5.5 V
CMOS low power consumption
Direct interface with TTL levels
Output drive capability 50
W
transmission lines @ 85
C
DESCRIPTION
The 74LVC74A is a high-performance, low-voltage Si-gate CMOS
device and superior to most advanced CMOS compatible TTL
families.
The 74LVC74A is a dual positive edge triggered, D-type flip-flop with
individual data (D) inputs, clock (CP) inputs, set (S
D
) and (R
D
)
inputs; also complementary Q and Q outputs.
The set and reset are asynchronous active LOW inputs and operate
independently of the clock input. Information on the data input is
transferred to the Q output on the LOW-to-HIGH transition of the
clock pulse. The D inputs must be stable one set-up time prior to the
LOW-to-HIGH clock transition, for predictable operation.
Schmitt-trigger action in all data inputs makes the circuit highly
tolerant to slower clock rise and fall times.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
C; t
r
= t
f
2.5 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL/
t
PLH
Propagation delay
nCP to nQ, nQ
nS
D
to nQ, nQ
nR
D
to nQ, nQ
C
L
= 50 pF;
V
CC
= 3.3 V
3.6
3.5
3.5
ns
f
max
Maximum clock frequency
250
MHz
C
I
Input capacitance
5.0
pF
C
PD
Power dissipation capacitance per flip-flop
Notes 1 and 2
30
pF
NOTES:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
W)
P
D
= C
PD
V
CC
2
f
i
)
(C
L
V
CC
2
f
o
) + (V
O
2
/R
L
)
duty factor LOW, where:
f
i
= input frequency in MHz; C
L
= output load capacity in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
V
CC
2
f
o
) = sum of the outputs.
2. The condition is V
I
= GND to V
CC.
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
DWG NUMBER
14-Pin Plastic SO
40
C to +85
C
74LVC74A D
74LVC74A D
SOT108-1
14-Pin Plastic SSOP Type II
40
C to +85
C
74LVC74A DB
74LVC74A DB
SOT337-1
14-Pin Plastic TSSOP Type I
40
C to +85
C
74LVC74A PW
74LVC74APW DH
SOT402-1
PIN CONFIGURATION
SV00491
1R
D
1D
1CP
1S
D
1Q
1Q
GND
V
CC
2R
D
2D
2CP
2S
D
2Q
2Q
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LOGIC SYMBOL (IEEE/IEC)
SV00332
4
3
2
1
10
11
12
13
5
6
9
8
S
C1
1D
R
S
C2
2D
R
Dual D-type flip-flop with set and reset;
positive-edge trigger
Philips Semiconductors
Product Specification
74LVC74A
1998 Jun 17
3
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
NAME AND FUNCTION
1, 13
1R
D
, 2R
D
Asynchronous reset-direct input
(active LOW)
2, 12
1D, 2D
Data inputs
3, 11
1CP, 2CP
Clock input (LOW-to-HIGH, edge
triggered)
4, 10
1S
D
, 2S
D
Asynchronous set-direct input (active
LOW)
5, 9
1Q, 2Q
True flip-flop outputs
6, 8
1Q, 2Q
Complement flip-flop outputs
7
GND
Ground (0 V)
14
V
CC
Positive supply voltage
LOGIC SYMBOL
SV00492
4 10
1 13
1S
D
2S
D
1R
D
2R
D
S
D
R
D
2
12
3
11
1D
2D
1CP
2CP
1Q
2Q
5
9
1Q
2Q
5
9
D
CP
Q
FF
Q
FUNCTION TABLE
INPUTS
OUTPUTS
S
D
R
D
CP
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H
H
INPUTS
OUTPUTS
S
D
R
D
CP
D
Q
n+1
Q
n+1
H
H
L
L
H
H
H
H
H
L
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don"t care
= LOW-to-HIGH CP transition
Q
n+1
= state after the next LOW-to-HIGH CP transition
FUNCTIONAL DIAGRAM
SV00494
CP FF1
D
Q
Q
1D
2
1CP
3
4
SD
1SD
1 1RD
RD
6
1Q
1Q
5
CP FF2
D
Q
Q
2D
12
2CP
11
10
SD
2SD
13 2R
D
RD
8
2Q
2Q
9
Dual D-type flip-flop with set and reset;
positive-edge trigger
Philips Semiconductors
Product Specification
74LVC74A
1998 Jun 17
4
LOGIC DIAGRAM (ONE FLIP-FLOP)
SV00495
C
D
CP
RD
SD
C
C
C
C
C
C
C
Q
Q
C
C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
CONDITIONS
LIMITS
UNIT
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX
UNIT
V
CC
DC supply voltage (for max. speed performance)
2.7
3.6
V
V
CC
DC supply voltage (for low-voltage applications)
1.2
3.6
V
V
I
DC input voltage range
0
5.5
V
V
O
DC output voltage range
0
V
CC
V
T
amb
Operating free-air temperature range
40
+85
C
t
r
, t
f
Input rise and fall times
V
CC
= 1.2 to 2.7V
V
CC
= 2.7 to 3.6V
0
0
20
10
ns/V
ABSOLUTE MAXIMUM RATINGS
1
In accordance with the Absolute Maximum Rating System (IEC 134)
Voltages are referenced to GND (ground = 0V)
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
CC
DC supply voltage
0.5 to +6.5
V
I
IK
DC input diode current
V
I
t
0
50
mA
V
I
DC input voltage
Note 2
0.5 to +5.5
V
I
OK
DC output diode current
V
O
u
V
CC
or V
O
t
0
"
50
mA
V
O
DC output voltage
Note 2
0.5 to V
CC
+0.5
V
I
O
DC output source or sink current
V
O
= 0 to V
CC
"
50
mA
I
GND
, I
CC
DC V
CC
or GND current
"
100
mA
T
stg
Storage temperature range
65 to +150
C
Power dissipation per package
P
TOT
plastic mini-pack (SO)
above +70
C derate linearly with 8 mW/K
500
mW
plastic shrink mini-pack (SSOP and TSSOP)
above +60
C derate linearly with 5.5 mW/K
500
mW
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Dual D-type flip-flop with set and reset;
positive-edge trigger
Philips Semiconductors
Product Specification
74LVC74A
1998 Jun 17
5
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions voltages are referenced to GND (ground = 0V)
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40
C to +85
C
UNIT
MIN
TYP1
MAX
V
HIGH level Input voltage
V
CC
= 1.2V
V
CC
V
V
IH
HIGH level Input voltage
V
CC
= 2.7 to 3.6V
2.0
V
V
LOW level Input voltage
V
CC
= 1.2V
GND
V
V
IL
LOW level Input voltage
V
CC
= 2.7 to 3.6V
0.8
V
V
CC
= 2.7V; V
I
= V
IH
or V
IL
; I
O
= 12mA
V
CC
*
0.5
V
O
HIGH level output voltage
V
CC
= 3.0V; V
I
= V
IH
or V
IL
; I
O
= 100
A
V
CC
*
0.2
V
CC
V
V
OH
HIGH level output voltage
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 18mA
V
CC
*
0.6
V
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 24mA
V
CC
*
1.0
V
CC
= 2.7V; V
I
= V
IH
or V
IL
; I
O
= 12mA
0.40
V
OL
LOW level output voltage
V
CC
= 3.0V; V
I
= V
IH
or V
IL
; I
O
= 100
A
GND
0.20
V
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 24mA
0.55
I
Input leakage current
V
= 3 6V; V = 5 5V or GND
"
0 1
"
5
A
I
I
Input leakage current
V
CC
= 3.6V; V
I
= 5.5V or GND
"
0.1
"
5
A
I
CC
Quiescent supply current
V
CC
= 3.6V; V
I
= V
CC
or GND; I
O
= 0
0.1
10
A
I
CC
Additional quiescent supply current per
input pin
V
CC
= 2.7V to 3.6V; V
I
= V
CC
0.6V; I
O
= 0
5
500
A
NOTES:
1. All typical values are at V
CC
= 3.3V and T
amb
= 25
C.
AC CHARACTERISTICS
GND = 0 V; t
r
= t
f
v
2.5 ns; C
L
= 50 pF; R
L
= 500
W
; T
amb
= 40
_
C to +85
_
C
LIMITS
SYMBOL
PARAMETER
WAVEFORM
V
CC
= 3.3V
0.3V
V
CC
= 2.7V
UNIT
MIN
TYP
1
MAX
MIN
MAX
Propagation delay
nCP to nQ, nQ
Figures 1, 3
1.5
3.6
5.2
6.0
ns
t
PHL
/
t
PLH
Propagation delay
nS
D
to nQ, nQ
Figures 2, 3
1.5
3.5
5.4
6.4
ns
Propagation delay
nR
D
to nQ, nQ
Figures 2, 3
1.5
3.5
5.4
6.4
ns
t
W
Clock pulse width HIGH or LOW
Figure 1
3.3
1.3
ns
t
W
Set or reset pulse width LOW
Figure 2
3.3
1.7
ns
t
rem
Removal time set or reset
Figure 2
1
3
ns
t
su
Set-up time nD to nCP
Figure 1
2.0
0.8
ns
t
h
Hold time nD to nCP
Figure 1
1
0.7
ns
f
max
Maximum clock pulse frequency
Figure 1
150
250
MHz
NOTE:
1. These typical values are at V
CC
= 3.3V and T
amb
= 25
C.
Dual D-type flip-flop with set and reset;
positive-edge trigger
Philips Semiconductors
Product Specification
74LVC74A
1998 Jun 17
6
AC WAVEFORMS
V
M
= 1.5 V at V
CC
w
2.7 V
V
M
= 0.5
S
V
CC
at V
CC
< 2.7 V
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
SV00489
VM
nD INPUT
nCP INPUT
nQ OUTPUT
nQ OUTPUT
VM
VM
VM
t su
t su
1/f max
t h
th
t PHL
t PHL
t PLH
t PLH
tW
GND
GND
VI
VI
VOL
VOL
VOH
VOH
NOTE: The shaded areas indicate when the inputis permitted to change for predictable
output performance.
Figure 1. Clock (nCP) to output (nQ, nQ) propagation delays,
clock pulse width, nD to nCP set-up times,
the nCP to nD hold times, output transition times
and maximum clock pulse frequency.
SV00490
VM
nCP INPUT
nS D INPUT
nR D INPUT
nQ OUTPUT
nQ OUTPUT
VM
VM
VM
trem
tPHL
tPLH
tW
tW
VM
tPHL
tPLH
GND
GND
GND
VI
VI
VI
VOL
VOL
VOH
VOH
Figure 2. Set (nS
D
) and reset (nR
D
) input to output (nQ, nQ)
propagation delays, the set and reset pulse widths
and the nRD to nCP removal time.
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
RT
VI
D.U.T.
VO
CL
VCC
500
Open
GND
S
1
V
CC
V
I
< 2.7V
V
CC
TEST
S
1
t
PLH/
t
PHL
Open
2.7V
2.73.6V
50pF
500
2 * V
CC
SV00903
Figure 3. Load circuitry for switching times.
Philips Semiconductors
Product specification
74LVC74A
Dual D-type flip-flop with set and reset;
positive-edge trigger
1998 Jun 17
7
SO14:
plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
Philips Semiconductors
Product specification
74LVC74A
Dual D-type flip-flop with set and reset;
positive-edge trigger
1998 Jun 17
8
SSOP14:
plastic shrink small outline package; 14 leads; body width 5.3 mm
SOT337-1
Philips Semiconductors
Product specification
74LVC74A
Dual D-type flip-flop with set and reset;
positive-edge trigger
1998 Jun 17
9
TSSOP14:
plastic thin shrink small outline package; 14 leads; body width 4.4 mm
SOT402-1
Philips Semiconductors
Product specification
74LVC74A
Dual D-type flip-flop with set and reset;
positive-edge trigger
yyyy mmm dd
10
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 940883409
Telephone 800-234-7381
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code
Date of release: 06-96
Document order number:
9397-750-04487
Philips
Semiconductors
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition
[1]
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
Data sheet status
[1]
Please consult the most recently issued datasheet before initiating or completing a design.
PDF 
ZIP