SN54F373, SN74F373
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SDFS076A – D2932, MARCH 1987 – REVISED OCTOBER 1993
Copyright 1993, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Eight Latches in a Single Package
3-State Bus-Driving True Outputs
Full Parallel Access for Loading
Buffered Control Inputs
Package Options Include Plastic
Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs
description
These 8-bit latches feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. They are
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight latches of the F373 are transparent
D-type latches. While the latch-enable (LE) input
is high, the Q outputs will follow the data (D) inputs.
When the latch enable is taken low , the Q outputs
are latched at the logic levels set up at the D
inputs.
A buffered output-enable (OE) input can be used
to place the eight outputs in either a normal
logic state (high or low logic levels) or a
high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus
lines significantly. The high-impedance state and
increased drive provide the capability to drive bus
lines without need for interface or pullup
components.
The output-enable (OE) input does not affect the internal operations of the latches. Old data can be retained
or new data can be entered while the outputs are in the high-impedance state.
The SN74F373 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count
and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54F373 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74F373 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each latch)
INPUTS OUTPUT
OE LE DQ
L H H H
LHL L
LLX Q
0
H X X Z
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
VCC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE
SN54F373 ...J PACKAGE
SN74F373 ... DB, DW, OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
2D
2Q
3Q
3D
4D
SN54F373 . . . FK PACKAGE
(TOP VIEW)
1D
1Q
OE
5Q
5D 8Q
4Q
GND
LE VCC
8D
7D
7Q
6Q
6D
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.
SN54F373, SN74F373
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SDFS076A – D2932, MARCH 1987 – REVISED OCTOBER 1993
2POST OFFICE BOX 655303 DALLAS, TEXAS 75265
logic symbollogic diagram (positive logic)
OE
1D
3
1D 4
2D 7
3D 8
4D 13
5D
C1
11
LE
1Q
2
2Q
5
3Q
6
4Q
9
5Q
12
6Q
15
7Q
16
8Q
19
14
6D 17
7D 18
8D
EN
1OE
LE
1D 1Q
1
11
32
To Seven Other Channels
C1
1D
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
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) 1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range 30 mA to 5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state 0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state 0.5 V to VCC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state: SN54F373 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F373 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54F373 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F373 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range 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 af fect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
recommended operating conditions
SN54F373 SN74F373
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL Low-level input voltage 0.8 0.8 V
IIK Input clamp current –18 –18 mA
IOH High-level output current –3 –3 mA
IOL Low-level output current 20 24 mA
TAOperating free-air temperature –55 125 0 70 °C
SN54F373, SN74F373
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SDFS076A – D2932, MARCH 1987 – REVISED OCTOBER 1993
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F373 SN74F373
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYPMAX MIN TYPMAX
UNIT
VIK VCC = 4.5 V, II = –18 mA 1.2 1.2 V
VCC =45V
IOH = – 1 mA 2.5 3.4 2.5 3.4
VOH
V
CC =
4
.
5
V
IOH = – 3 mA 2.4 3.3 2.4 3.3 V
VCC = 4.75 V, IOH = – 1 mA to –3 mA 2.7
VOL
VCC =45V
IOL = 20 mA 0.3 0.5
V
V
OL
V
CC =
4
.
5
V
IOL = 24 mA 0.35 0.5
V
IOZH VCC = 5.5 V, VO = 2.7 V 50 50 µA
IOZL VCC = 5.5 V, VO = 0.5 V –50 –50 µA
IIVCC = 5.5 V, VI = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL VCC = 5.5 V, VI = 0.5 V 0.6 0.6 mA
IOSVCC = 5.5 V, VO = 0 –60 –150 –60 –150 mA
ICCZ VCC = 5.5 V, See Note 2 38 55 38 55 mA
All typical values are at VCC = 5 V, TA = 25°C.
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
NOTE 2: ICCZ is measured with OE at 4.5 V and all other inputs grounded.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
VCC = 5 V,
TA = 25°CSN54F373 SN74F373
UNIT
F373 UNIT
MIN MAX MIN MAX MIN MAX
twPulse duration, LE high 6 6 6 ns
tsu Setup time, data before LE2 2 2 ns
thHold time, data after LE3 3 3 ns
switching characteristics (see Note 3)
PARAMETER FROM
(
INPUT
)
TO
(
OUTPUT
)
VCC = 5 V,
CL = 50 pF,
RL = 500 ,
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500,
TA = MIN to MAX§UNIT
(INPUT)
(OUTPUT)
F373 SN54F373 SN74F373
MIN TYP MAX MIN MAX MIN MAX
tPLH
D
Q
2.2 4.9 7 2.2 8.5 2.2 8
ns
tPHL
D
Q
1.2 3.3 5 1.2 7 1.2 6
ns
tPLH
LE
Q
4.2 8.6 11.5 4.2 15 4.2 13
ns
tPHL
LE
Q
2.2 4.8 7 2.2 8.5 2.2 8
ns
tPZH
OE
Q
1.2 4.6 11 1.2 13.5 1.2 12
ns
tPZL
OE
Q
1.2 5.2 7.5 1.2 10 1.2 8.5
ns
tPHZ
OE
Q
1.2 4.1 6.5 1.2 10 1.2 7.5
ns
tPLZ
OE
Q
1.2 3.4 6 1.2 7 1.2 6
ns
§For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 3: Load circuits and waveforms are shown in Section 1.
PACKAGE OPTION ADDENDUM
www.ti.com 6-Feb-2020
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
5962-9758901Q2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962-
9758901Q2A
SNJ54F
373FK
5962-9758901QRA ACTIVE CDIP J 20 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9758901QR
A
SNJ54F373J
5962-9758901QSA ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9758901QS
A
SNJ54F373W
JM38510/34601B2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 JM38510/
34601B2A
JM38510/34601BRA ACTIVE CDIP J 20 1 TBD Call TI N / A for Pkg Type -55 to 125 JM38510/
34601BRA
JM38510/34601BSA ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type -55 to 125 JM38510/
34601BSA
M38510/34601B2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 JM38510/
34601B2A
M38510/34601BRA ACTIVE CDIP J 20 1 TBD Call TI N / A for Pkg Type -55 to 125 JM38510/
34601BRA
M38510/34601BSA ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type -55 to 125 JM38510/
34601BSA
SN54F373J ACTIVE CDIP J 20 1 TBD Call TI N / A for Pkg Type -55 to 125 SN54F373J
SN74F373DBR ACTIVE SSOP DB 20 2000 Green (RoHS
& no Sb/Br) NIPDAU Level-1-260C-UNLIM 0 to 70 F373
SN74F373DW ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) NIPDAU Level-1-260C-UNLIM 0 to 70 F373
SN74F373DWG4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) NIPDAU Level-1-260C-UNLIM 0 to 70 F373
SN74F373DWR ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) NIPDAU Level-1-260C-UNLIM 0 to 70 F373
SN74F373DWRG4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) NIPDAU Level-1-260C-UNLIM 0 to 70 F373
PACKAGE OPTION ADDENDUM
www.ti.com 6-Feb-2020
Addendum-Page 2
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
SN74F373N ACTIVE PDIP N 20 20 Pb-Free
(RoHS) NIPDAU N / A for Pkg Type 0 to 70 SN74F373N
SN74F373NSR ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) NIPDAU Level-1-260C-UNLIM 0 to 70 74F373
SNJ54F373FK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962-
9758901Q2A
SNJ54F
373FK
SNJ54F373J ACTIVE CDIP J 20 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9758901QR
A
SNJ54F373J
SNJ54F373W ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9758901QS
A
SNJ54F373W
(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 <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
PACKAGE OPTION ADDENDUM
www.ti.com 6-Feb-2020
Addendum-Page 3
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF SN54F373, SN74F373 :
Catalog: SN74F373
Military: SN54F373
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
Military - QML certified for Military and Defense Applications
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74F373DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1
SN74F373DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1
SN74F373NSR SO NS 20 2000 330.0 24.4 8.4 13.0 2.5 12.0 24.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 6-May-2017
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74F373DBR SSOP DB 20 2000 367.0 367.0 38.0
SN74F373DWR SOIC DW 20 2000 367.0 367.0 45.0
SN74F373NSR SO NS 20 2000 367.0 367.0 45.0
PACKAGE MATERIALS INFORMATION
www.ti.com 6-May-2017
Pack Materials-Page 2
www.ti.com
PACKAGE OUTLINE
C
TYP
10.63
9.97
2.65 MAX
18X 1.27
20X 0.51
0.31
2X
11.43
TYP
0.33
0.10
0 - 8
0.3
0.1
0.25
GAGE PLANE
1.27
0.40
A
NOTE 3
13.0
12.6
B7.6
7.4
4220724/A 05/2016
SOIC - 2.65 mm max heightDW0020A
SOIC
NOTES:
1. All linear dimensions are in millimeters. Dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not
exceed 0.15 mm per side.
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.43 mm per side.
5. Reference JEDEC registration MS-013.
120
0.25 C A B
11
10
PIN 1 ID
AREA
NOTE 4
SEATING PLANE
0.1 C
SEE DETAIL A
DETAIL A
TYPICAL
SCALE 1.200
www.ti.com
EXAMPLE BOARD LAYOUT
(9.3)
0.07 MAX
ALL AROUND
0.07 MIN
ALL AROUND
20X (2)
20X (0.6)
18X (1.27)
(R )
TYP
0.05
4220724/A 05/2016
SOIC - 2.65 mm max heightDW0020A
SOIC
SYMM
SYMM
LAND PATTERN EXAMPLE
SCALE:6X
1
10 11
20
NOTES: (continued)
6. Publication IPC-7351 may have alternate designs.
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.
METAL
SOLDER MASK
OPENING
NON SOLDER MASK
DEFINED
SOLDER MASK DETAILS
SOLDER MASK
OPENING
METAL UNDER
SOLDER MASK
SOLDER MASK
DEFINED
www.ti.com
EXAMPLE STENCIL DESIGN
(9.3)
18X (1.27)
20X (0.6)
20X (2)
4220724/A 05/2016
SOIC - 2.65 mm max heightDW0020A
SOIC
NOTES: (continued)
8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
9. Board assembly site may have different recommendations for stencil design.
SYMM
SYMM
1
10 11
20
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
SCALE:6X
www.ti.com
PACKAGE OUTLINE
C
18X 0.65
2X
5.85
20X 0.38
0.22
8.2
7.4 TYP
SEATING
PLANE
0.05 MIN
0.25
GAGE PLANE
0 -8
2 MAX
B5.6
5.0
NOTE 4
A
7.5
6.9
NOTE 3
0.95
0.55
(0.15) TYP
SSOP - 2 mm max heightDB0020A
SMALL OUTLINE PACKAGE
4214851/B 08/2019
1
10 11
20
0.1 C A B
PIN 1 INDEX AREA
SEE DETAIL A
0.1 C
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not
exceed 0.15 mm per side.
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side.
5. Reference JEDEC registration MO-150.
A 15
DETAIL A
TYPICAL
SCALE 2.000
www.ti.com
EXAMPLE BOARD LAYOUT
0.07 MAX
ALL AROUND 0.07 MIN
ALL AROUND
20X (1.85)
20X (0.45)
18X (0.65)
(7)
(R0.05) TYP
SSOP - 2 mm max heightDB0020A
SMALL OUTLINE PACKAGE
4214851/B 08/2019
NOTES: (continued)
6. Publication IPC-7351 may have alternate designs.
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 10X
SYMM
SYMM
1
10 11
20
15.000
METAL
SOLDER MASK
OPENING METAL UNDER
SOLDER MASK SOLDER MASK
OPENING
EXPOSED METAL
EXPOSED METAL
SOLDER MASK DETAILS
NON-SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK
DEFINED
www.ti.com
EXAMPLE STENCIL DESIGN
20X (1.85)
20X (0.45)
18X (0.65)
(7)
(R0.05) TYP
SSOP - 2 mm max heightDB0020A
SMALL OUTLINE PACKAGE
4214851/B 08/2019
NOTES: (continued)
8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
9. Board assembly site may have different recommendations for stencil design.
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
SCALE: 10X
SYMM
SYMM
1
10 11
20
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