SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
D 2-V to 6-V VCC Operation
D Inputs Accept Voltages to 6 V
D Max tpd of 10 ns at 5 V
SN54AC74 . . . J OR W PACKAGE
SN74AC74 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
1CLR
1D
1CLK
1PRE
1Q
1Q
GND
description/ordering information
The ’AC74 devices are dual positive-edgetriggered D-type flip-flops.
A low level at the preset (PRE) or clear (CLR) input
sets or resets the outputs, regardless of the levels
of the other inputs. When PRE and CLR are
inactive (high), data at the data (D) input meeting
the setup-time requirements is transferred to the
outputs on the positive-going edge of the clock
pulse. Clock triggering occurs at a voltage level
and is not directly related to the rise time of the
clock pulse. Following the hold-time interval, data
at D can be changed without affecting the levels
at the outputs.
1
14
2
13
3
12
4
11
5
10
6
9
7
8
VCC
2CLR
2D
2CLK
2PRE
2Q
2Q
1D
1CLR
NC
VCC
2CLR
SN54AC74 . . . FK PACKAGE
(TOP VIEW)
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
2D
NC
2CLK
NC
2PRE
1Q
GND
NC
2Q
2Q
1CLK
NC
1PRE
NC
1Q
NC − No internal connection
ORDERING INFORMATION
PDIP − N
SN74AC74N
Tube
SN74AC74D
Tape and reel
SN74AC74DR
SOP − NS
Tape and reel
SN74AC74NSR
AC74
SSOP − DB
Tape and reel
SN74AC74DBR
AC74
Tube
SN74AC74PW
Tape and reel
SN74AC74PWR
CDIP − J
Tube
SNJ54AC74J
SNJ54AC74J
CFP − W
Tube
SNJ54AC74W
SNJ54AC74W
LCCC − FK
Tube
SNJ54AC74FK
SNJ54AC74FK
TSSOP − PW
−55°C
125°C
−55
C to 125
C
TOP-SIDE
MARKING
Tube
SOIC − D
−40°C
85°C
−40
C to 85
C
ORDERABLE
PART NUMBER
PACKAGE†
TA
SN74AC74N
AC74
AC74
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2003, Texas Instruments Incorporated
! " #$%! " &$'(#! )!%*
)$#!" # ! "&%##!" &% !+% !%" %," "!$%!"
"!)) -!.* )$#! &#%""/ )%" ! %#%""(. #($)%
!%"!/ (( &%!%"*
&)$#!" #&(! ! 0121 (( &%!%" % !%"!%)
$(%"" !+%-"% !%)*
(( !+% &)$#!" &)$#!
&#%""/ )%" ! %#%""(. #($)% !%"!/ (( &%!%"*
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
FUNCTION TABLE
OUTPUTS
INPUTS
PRE
CLR
CLK
D
Q
L
H
X
X
H
L
H
L
X
X
H
H†
L
Q
L
L
X
X
L
H†
H
H
↑
H
H
H
H
↑
L
L
H
H
H
L
X
Q0
Q0
† This configuration is unstable; that is, it does not
persist when either PRE or CLR returns to its
inactive (high) level.
logic diagram, each flip-flop (positive logic)
PRE
CLK
C
C
C
Q
TG
C
C
C
C
D
TG
TG
TG
C
C
C
Q
CLR
2
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• DALLAS, TEXAS 75265
SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA
Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W
DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” 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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
VCC
VIH
Supply voltage
VCC = 3 V
VCC = 4.5 V
High-level input voltage
VCC = 5.5 V
VCC = 3 V
VIL
VI
VO
IOH
IOL
∆t/∆v
SN54AC74
SN74AC74
MIN
MAX
MIN
MAX
2
6
2
6
2.1
2.1
3.15
3.15
3.85
3.85
VCC = 4.5 V
VCC = 5.5 V
Low-level input voltage
Input voltage
0
Output voltage
0
High-level output current
Low-level output current
0.9
1.35
1.35
1.65
1.65
0
0
VCC
VCC
VCC = 3 V
VCC = 4.5 V
−12
−12
−24
−24
VCC = 5.5 V
VCC = 3 V
−24
−24
12
12
VCC = 4.5 V
VCC = 5.5 V
24
24
24
24
8
8
Input transition rise or fall rate
V
V
0.9
VCC
VCC
UNIT
V
V
V
mA
mA
ns/V
TA
Operating free-air temperature
−55
125
−40
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
IOH = −50 µA
IOH = −12 mA
VOH
IOH = −24 mA
TA = 25°C
TYP
MAX
3V
2.9
4.49
2.9
2.9
4.5 V
4.4
5.49
4.4
4.4
5.5 V
5.4
5.49
5.4
5.4
3V
2.56
2.4
2.46
4.5 V
3.86
3.7
3.76
5.5 V
4.86
4.7
4.76
MAX
V
3V
0.002
0.1
0.1
0.1
IOL = 50 µA
4.5 V
0.001
0.1
0.1
0.1
5.5 V
0.001
0.1
0.1
0.1
3.85
3V
0.36
0.5
0.44
4.5 V
0.36
0.5
0.44
5.5 V
0.36
0.5
0.44
5.5 V
VI = VCC or GND,
VI = VCC or GND
1.65
5.5 V
IO = 0
V
1.65
5.5 V
VI = VCC or GND
UNIT
3.85
Data pins
ICC
Ci
MIN
MAX
5.5 V
IOL = 50 mA†
IOL = 75 mA†
Control pins
SN74AC74
MIN
5.5 V
IOL = 24 mA
II
SN54AC74
IOH = −50 mA†
IOH = −75 mA†
IOL = 12 mA
VOL
MIN
5.5 V
±0.1
±1
±1
±0.1
±1
±1
2
40
20
5V
3
† Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
A
µA
µA
pF
timing requirements over recommended operating free-air temperature range,
VCC = 3.3 V " 0.3 V (unless otherwise noted) (see Figure 1)
TA = 25°C
MIN
MAX
fclock
4
Clock frequency
tw
Pulse duration
tsu
Setup time, data before CLK↑
th
Hold time, data after CLK↑
SN54AC74
SN74AC74
MIN
MIN
100
MAX
70
95
PRE or CLR low
5.5
8
7
CLK
5.5
8
7
Data
4
5
4.5
PRE or CLR inactive
0
0.5
0
0.5
0.5
0.5
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MAX
UNIT
MHz
ns
ns
ns
SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
timing requirements over recommended operating free-air temperature range,
VCC = 5 V"0.5 V (unless otherwise noted) (see Figure 1)
TA = 25°C
MIN
MAX
fclock
Clock frequency
SN54AC74
SN74AC74
MIN
MIN
140
tw
Pulse duration
tsu
Setup time, data before CLK↑
th
Hold time, data after CLK↑
MAX
95
MAX
125
PRE or CLR low
4.5
5.5
5
CLK
4.5
5.5
5
Data
3
4
3
PRE or CLR inactive
0
0.5
0
0.5
0.5
0.5
UNIT
MHz
ns
ns
ns
switching characteristics over recommended operating free-air temperature range,
VCC = 3.3 V " 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
fmax
tPLH
tPHL
tPLH
tPHL
FROM
(INPUT)
TO
(OUTPUT)
PRE or CLR
Q or Q
CLK
Q or Q
TA = 25°C
MIN
TYP
MAX
SN54AC74
SN74AC74
MIN
MAX
MIN
70
MAX
100
125
3.5
8
12
1
13
2.5
95
13
4
10.5
12
1
14
3.5
13.5
4.5
8
13.5
1
17.5
4
16
3.5
8
14
1
13.5
3.5
14.5
UNIT
MHz
ns
ns
switching characteristics over recommended operating free-air temperature range,
VCC = 5 V " 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
fmax
tPLH
tPHL
tPLH
tPHL
FROM
(INPUT)
TO
(OUTPUT)
PRE or CLR
Q or Q
CLK
Q or Q
MIN
TA = 25°C
TYP
MAX
SN54AC74
SN74AC74
MIN
MIN
MAX
95
MAX
140
160
125
2.5
6
9
1
9.5
2
10
3
8
9.5
1
10.5
2.5
10.5
3.5
6
10
1
12
3
10.5
2.5
6
10
1
10
2.5
10.5
UNIT
MHz
ns
ns
operating characteristics, VCC = 3.3 V, TA = 25°C
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance
CL = 50 pF,
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
f = 1 MHz
TYP
45
UNIT
pF
5
SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
500 Ω
From Output
Under Test
CL = 50 pF
(see Note A)
Open
TEST
S1
tPLH/tPHL
Open
500 Ω
tw
LOAD CIRCUIT
VCC
VCC
50% VCC
Input
0V
VOLTAGE WAVEFORMS
tPHL
tPLH
50% VCC
VOH
50% VCC
VOL
VCC
50% VCC
Timing Input
0V
tPLH
tPHL
Out-of-Phase
Output
50% VCC
50% VCC
0V
In-Phase
Output
50% VCC
Input
50% VCC
VOH
50% VCC
VOL
th
tsu
Data Input
VCC
50% VCC
50% VCC
0V
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr v 2.5 ns, tf v 2.5 ns.
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
26-Jul-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
5962-88520012A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
596288520012A
SNJ54AC
74FK
5962-8852001CA
ACTIVE
CDIP
J
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8852001CA
SNJ54AC74J
Samples
5962-8852001DA
ACTIVE
CFP
W
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8852001DA
SNJ54AC74W
Samples
5962-8852001VDA
ACTIVE
CFP
W
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8852001VD
A
SNV54AC74W
SN74AC74D
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74DBR
ACTIVE
SSOP
DB
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74DR
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74N
ACTIVE
PDIP
N
14
25
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74AC74N
Samples
SN74AC74NE4
ACTIVE
PDIP
N
14
25
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74AC74N
Samples
SN74AC74NSR
ACTIVE
SO
NS
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74PW
ACTIVE
TSSOP
PW
14
90
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74PWR
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74PWRE4
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SN74AC74PWRG4
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC74
Samples
SNJ54AC74FK
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
596288520012A
SNJ54AC
74FK
SNJ54AC74J
ACTIVE
CDIP
J
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8852001CA
SNJ54AC74J
Addendum-Page 1
Samples
Samples
Samples
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
26-Jul-2022
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
(3)
Device Marking
Samples
(4/5)
(6)
SNJ54AC74W
ACTIVE
CFP
W
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8852001DA
SNJ54AC74W
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of