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SN74AC373MDWREP

IC D-TYPE TRANSP 8:8 20-SOIC

Part Number: SN74AC373MDWREP

Manufacturer: Texas Instruments

Category: Latches

Package: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: SN74AC373MDWREP.pdf

Description: IC D-TYPE TRANSP 8:8 20-SOIC

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

SN74AC373MDWREP Enhanced Product Octal D-Type Transparent Latch with 3-State Outputs

A comprehensive technical overview of the SN74AC373MDWREP, an Enhanced Product (EP) octal D-type transparent latch from Texas Instruments featuring 2-V to 6-V VCC operation, 9.5 ns max propagation delay at 5 V, 3-state noninverting outputs, and extended temperature range of –55°C to 125°C. Covers device function, core features, electrical specifications, 20-lead SOIC package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 20-SOIC 2V to 6V

Device Classification Octal D-Type Transparent Latch with 3-State Outputs

Part Number: SN74AC373MDWREP

Mounting Type: Surface Mount

Operating Temperature Range: -55°C to +125°C

PRODUCT OVERVIEW

What Is the SN74AC373MDWREP?

SN74AC373MDWREP is an Enhanced Product (EP) octal D-type transparent latch from Texas Instruments, part of the SN74AC373-EP family. The device features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads.

The device consists of eight D-type transparent latches with 3-state outputs. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE 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 the high-impedance state. OE does not affect the internal operations of the latches, allowing old data to be retained or new data to be entered while the outputs are in the high-impedance state.

The EP designation provides support for defense, aerospace, and medical applications with controlled baseline, extended product life cycle, extended product-change notification, product traceability, and qualification pedigree. The device is characterized for operation from –55°C to +125°C. The SN74AC373MDWREP is offered in a 20-lead SOIC (DW) package.

Octal Transparent Latch Eight D-type latches with 3-state outputs for bus-oriented systems.

Wide Voltage Operation 2-V to 6-V VCC operation with 9.5 ns max propagation delay at 5 V.

Enhanced Product (EP) Supports defense, aerospace, and medical applications with –55°C to 125°C temperature range and qualification pedigree.

DEVICE HIGHLIGHTS

Key Features and Benefits of SN74AC373MDWREP

Octal Transparent Latch with 3-State Outputs

Eight D-type transparent latches with 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads.

Wide Supply Voltage Range

Operates from 2 V to 6 V VCC, supporting 2.5-V, 3.3-V, and 5-V logic levels.

High-Speed Performance

Maximum propagation delay of 9.5 ns at 5 V ensures fast signal propagation for high-speed bus applications.

Enhanced Product (EP) Qualification

Supports defense, aerospace, and medical applications with controlled baseline, extended product life cycle, qualification pedigree, and –55°C to 125°C operation.

3-State Noninverting Outputs

3-state noninverting outputs drive bus lines directly without need for interface or pullup components.

20-Lead SOIC Package

Available in a 20-lead SOIC (DW) package with top-side marking "SAC373MEP".

REFERENCE DATA

Technical Specifications for SN74AC373MDWREP

Part Number	SN74AC373MDWREP	Manufacturer	Texas Instruments
Device Type	Octal D-Type Transparent Latch with 3-State Outputs	Logic Family	AC
Number of Channels	8	Circuit Configuration	8:8
Output Type	3-State, Noninverting	Supply Voltage (VCC)	2 V to 6 V
Propagation Delay (Max)	9.5 ns at 5 V	Propagation Delay (Typical)	7.5 ns
Setup Time	4 ns	Output Current (High, Low)	24 mA, 24 mA
Input Voltage (VI)	Up to 6 V	Package / Case	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package	20-SOIC	Package Body Size	12.80mm × 7.50mm
Mounting Type	Surface Mount	Package Height	2.35 mm
Operating Temperature (EP)	-55°C to +125°C	Moisture Sensitivity Level	Level-1-260C-UNLIM
RoHS	Green (RoHS & no Sb/Br)	Lead Finish / Ball Material	CU NIPDAU
Packaging	Tape & Reel (2,000 per Reel)	Reel Diameter	330 mm
Product Status	ACTIVE	Device Marking	SAC373MEP
V62/04621-01XE	V62/04621-01XE	US ECCN	EAR99

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use. Enhanced Product specifications apply over the temperature range of –55°C to 125°C.

DESIGN REFERENCE

Circuit Considerations for SN74AC373MDWREP

Power Supply & Decoupling

The SN74AC373MDWREP requires proper power supply design for optimal performance:

Supply Voltage: Operates with VCC from 2 V to 6 V
Decoupling: Place a ceramic capacitor (0.1 µF) close to the VCC pin to minimize supply noise
Input Voltage: Inputs accept voltages up to 6 V
Ioff Support: Supports partial-power-down mode with Ioff circuitry to prevent backflow current

PCB and Signal Integrity Guidance

Latch performance depends on layout and signal routing:

Output Enable Control: To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver
Latch Enable: When LE is high, Q outputs follow D inputs; when LE is low, Q outputs are latched at the logic levels set up at the D inputs
3-State Outputs: When OE is high, outputs are in the high-impedance state, allowing multiple outputs to be connected to a common bus
Ground Plane: Use a solid ground plane to minimize noise and ensure low-inductance return paths
Trace Routing: Keep bus traces short and maintain controlled impedance for high-speed operation
PCB Layout: Follow the recommended PCB footprint from the official datasheet prior to production

20-LEAD SOIC (12.80mm × 7.50mm)

Pin Configuration Reference for SN74AC373MDWREP

SAC373MEP

SOIC TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The SOIC (DW) package has 20 pins with a 12.80mm × 7.50mm body size. Device marking for the SN74AC373MDWREP is "SAC373MEP".

1 OE Output Enable (Active Low) - Places outputs in normal logic state or high-impedance state

2 1Q Data Output for Latch 1

3 1D Data Input for Latch 1

4 2D Data Input for Latch 2

5 2Q Data Output for Latch 2

6 3Q Data Output for Latch 3

7 3D Data Input for Latch 3

8 4D Data Input for Latch 4

9 4Q Data Output for Latch 4

10 GND Ground

11 LE Latch Enable - When high, Q outputs follow D inputs; when low, Q outputs are latched

12 5Q Data Output for Latch 5

13 5D Data Input for Latch 5

14 6D Data Input for Latch 6

15 6Q Data Output for Latch 6

16 7Q Data Output for Latch 7

17 7D Data Input for Latch 7

18 8D Data Input for Latch 8

19 8Q Data Output for Latch 8

20 VCC Positive Power Supply (2 V to 6 V)

APPLICATION AREAS

Typical Applications for SN74AC373MDWREP

Buffer Registers

Suitable for implementing buffer registers in bus-oriented systems with 3-state outputs.

I/O Ports

Provides I/O port expansion with transparent latching and 3-state outputs for microprocessor and microcontroller systems.

Bidirectional Bus Drivers

Drives bus lines in bus-organized systems without need for interface or pullup components.

Defense & Aerospace Systems

Enhanced Product (EP) qualification with controlled baseline and –55°C to 125°C temperature range supports military and aerospace applications.

Working Registers

Implements working registers for data storage and manipulation in digital systems.

Medical Instrumentation

EP qualification and wide temperature range support medical diagnostic equipment requiring high reliability.

REPLACEMENT GUIDANCE

Selecting an Alternative for SN74AC373MDWREP

A replacement for the SN74AC373MDWREP should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Texas Instruments datasheet and product pages.

8 D-type transparent latches with 3-state outputs

Supply voltage: 2 V to 6 V

Propagation delay: 9.5 ns max at 5 V

Output current: 24 mA (high and low)

Package: 20-SOIC (DW)

Temperature range: –55°C to 125°C (EP)

3-state noninverting outputs

Full parallel access for loading

Packaging alternatives (same package, different carrier):

Part Number	Package	Carrier	SPQ	Temperature Range
SN74AC373MDWREP	20-SOIC (DW)	Tape & Reel	2,000	-55°C to 125°C

The SN74AC373MDWREP is the Enhanced Product (EP) version of the octal transparent latch in 20-SOIC (DW) package with tape-and-reel packaging (2,000 units per reel). The device is characterized for operation from –55°C to 125°C. For commercial temperature range (0°C to 85°C) or industrial temperature range (–40°C to 85°C) versions in the same package, refer to the SN74AC373DW or SN74AC373DW-EP product pages. Select based on temperature requirements.

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MANUFACTURER INFORMATION

Texas Instruments

The SN74AC373-EP (SN74AC373MDWREP) belongs to the SN74AC373 family of octal D-type transparent latches with 3-state outputs from Texas Instruments. The device is designed for 2-V to 6-V VCC operation and features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The Enhanced Product (EP) designation provides support for defense, aerospace, and medical applications with controlled baseline, extended product life cycle, extended product-change notification, product traceability, and qualification pedigree. The SN74AC373-EP is characterized for operation from –55°C to 125°C and is available in a 20-lead SOIC (DW) package.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: SN74AC373MDWREP

Manufacturer: Texas Instruments

Package: 20-SOIC (0.295", 7.50mm Width)

Series: 74AC

Package/Case: 20-SOIC (0.295", 7.50mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Logic Type: D-Type Transparent Latch

Circuit: 8:8

Output Type: Tri-State

Voltage - Supply: 2V ~ 6V

Independent Circuits: 1

Delay Time - Propagation: 7.5ns

Current - Output High, Low: 24mA, 24mA

Operating Temperature: -55°C ~ 125°C

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 20-SOIC

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SN74AC373MDWREP is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number: SN74AC373MDWREP

Manufacturer: Texas Instruments

Package: 20-SOIC (0.295", 7.50mm Width)

Category: Latches

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