SN74AHCT74-EP
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH CLEAR AND PRESET
SCLS495– JUNE 2003
D
D
D
D
D
D
D
D
D
D OR PW PACKAGE
(TOP VIEW)
Controlled Baseline
– One Assembly/Test Site, One Fabrication
Site
Extended Temperature Performance of
–55°C to 125°C
Enhanced Diminishing Manufacturing
Sources (DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree†
Inputs Are TTL-Voltage Compatible
EPIC (Enhanced-Performance Implanted
CMOS) Process
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
1CLR
1D
1CLK
1PRE
1Q
1Q
GND
1
14
2
13
3
12
4
11
5
10
6
9
7
8
VCC
2CLR
2D
2CLK
2PRE
2Q
2Q
† Component qualification in accordance with JEDEC and industry
standards to ensure reliable operation over an extended
temperature range. This includes, but is not limited to, Highly
Accelerated Stress Test (HAST) or biased 85/85, temperature
cycle, autoclave or unbiased HAST, electromigration, bond
intermetallic life, and mold compound life. Such qualification
testing should not be viewed as justifying use of this component
beyond specified performance and environmental limits.
description/ordering information
The SN74AHCT74 is a dual positive-edge-triggered D-type flip-flop.
A low level at the preset (PRE) or clear (CLR) inputs 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 the D input can be changed without affecting the levels at the outputs.
ORDERING INFORMATION
–55°C
55°C to 125°C
ORDERABLE
PART NUMBER
PACKAGE‡
TA
SOIC – D
Tape and reel
SN74AHCT74MDREP
TSSOP – PW
Tape and reel
SN74AHCT74MPWREP
TOP-SIDE
MARKING
AHCT74MEP
AHT74EP
‡ 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.
EPIC is a trademark of Texas Instruments.
Copyright 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN74AHCT74-EP
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH CLEAR AND PRESET
SCLS495– JUNE 2003
FUNCTION TABLE
OUTPUTS
INPUTS
PRE
CLR
CLK
D
Q
L
H
X
X
H
Q
L
H
L
X
X
H
H†
L
L
X
X
L
H†
H
H
↑
H
H
L
H
H
↑
L
L
H
H
H
L
X
Q0
Q0
† This configuration is unstable; that is, it does not
persist when PRE or CLR returns to its inactive
(high) level.
logic symbol‡
1PRE
4
1CLK
1CLR
2PRE
1D
1
6
1Q
R
10
9
11
2CLK
1Q
C1
2
1D
5
S
3
2Q
12
2D
8
2CLR
13
2Q
‡ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN74AHCT74-EP
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH CLEAR AND PRESET
SCLS495– JUNE 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 7 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°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
VIL
VI
Low-level input voltage
Input voltage
VO
IOH
Output voltage
IOL
∆t/∆v
Low-level output current
MIN
MAX
4.5
5.5
High-level input voltage
2
UNIT
V
V
0.8
V
0
5.5
V
0
VCC
–8
High-level output current
Input transition rise or fall rate
V
mA
8
mA
20
ns/V
TA
Operating free-air temperature
–55
125
°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.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
MIN
TYP
MAX
MIN
MAX
UNIT
VOH
IOH = –50 mA
IOH = –8 mA
45V
4.5
VOL
IOL = 50 mA
IOL = 8 mA
45V
4.5
II
ICC
VI = 5.5 V or GND
VI = VCC or GND,
±0.1
±1
mA
IO = 0
5.5 V
2
20
mA
∆ICC‡
One input at 3.4 V,
Other inputs at VCC or GND
5.5 V
1.35
1.5
mA
0 V to 5.5 V
Ci
4.4
4.5
4.4
3.94
0.1
0.1
0.36
0.44
VI = VCC or GND
5V
2
10
‡ This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V
3.8
V
pF
3
SN74AHCT74-EP
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH CLEAR AND PRESET
SCLS495– JUNE 2003
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
TA = 25°C
MIN
MAX
PARAMETER
tw
Pulse duration
tsu
Setup time before CLK↑
th
Hold time, data after CLK↑
MIN
PRE or CLR low
5
5
CLK
5
5
Data
5
5
3.5
3.5
0
0
PRE or CLR inactive
MAX
UNIT
ns
ns
ns
switching characteristics over recommended operating free-air temperature range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
fmax
TA = 25°C
TYP
MAX
LOAD
CAPACITANCE
MIN
CL = 15 pF
100
160
80
CL = 50 pF
80
140
65
tPLH
tPHL
PRE or CLR
Q or Q
CL = 15 pF
tPLH
tPHL
CLK
Q or Q
CL = 15 pF
tPLH
tPHL
PRE or CLR
Q or Q
CL = 50 pF
tPLH
tPHL
CLK
Q or Q
CL = 50 pF
MIN
MAX
UNIT
MHz
7.6
10.4
1
12
7.6
10.4
1
12
5.8
7.8
1
9
5.8
7.8
1
9
8.1
11.4
1
13
8.1
11.4
1
13
6.3
8.8
1
10
6.3
8.8
1
10
MIN
MAX
ns
ns
ns
ns
noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4)
PARAMETER
UNIT
VOL(P)
VOL(V)
Quiet output, maximum dynamic VOL
VOH(V)
VIH(D)
Quiet output, minimum dynamic VOH
4
V
High-level dynamic input voltage
2
V
Quiet output, minimum dynamic VOL
VIL(D)
Low-level dynamic input voltage
NOTE 4: Characteristics are for surface-mount packages only.
0.8
V
–0.8
V
0.8
V
TYP
UNIT
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
Cpd
4
TEST CONDITIONS
Power dissipation capacitance
No load,
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
f = 1 MHz
32
pF
SN74AHCT74-EP
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH CLEAR AND PRESET
SCLS495– JUNE 2003
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
tw
Test
Point
3V
CL
(see Note A)
1.5 V
Input
1.5 V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
LOAD CIRCUIT
3V
Input
(see Note B)
1.5 V
1.5 V
0V
tPLH
3V
Timing Input
(see Note B)
1.5 V
In-Phase
Output
tPHL
50% VCC
0V
th
tsu
tPHL
3V
Data Input
1.5 V
1.5 V
0V
Out-of-Phase
Output
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOH
50% VCC
VOL
tPLH
50% VCC
VOH
50% VCC
VOL
VOLTAGE WAVEFORMS
DELAY TIMES
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
C. The outputs are measured one at a time with one input transition per measurement.
+ 3 ns, tf + 3 ns.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
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)
(4/5)
(6)
SN74AHCT74MDREP
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-55 to 125
AHCT74MEP
SN74AHCT74MPWREP
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-55 to 125
AHT74EP
V62/03659-01XE
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-55 to 125
AHT74EP
V62/03659-01YE
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-55 to 125
AHCT74MEP
(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