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SN74AHC245MDWREP

IC TXRX NON-INVERT 5.5V 20SOIC

Part Number: SN74AHC245MDWREP

Manufacturer: Texas Instruments

Category: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74AHC245MDWREP.pdf

Description: IC TXRX NON-INVERT 5.5V 20SOIC

Select Quantity Stock: 11,041

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

SN74AHC245MDWREP Enhanced Product Octal Bus Transceiver with 3-State Outputs

A comprehensive technical overview of the SN74AHC245MDWREP, an Enhanced Product octal bus transceiver from Texas Instruments featuring 3-state outputs, 2.0V to 5.5V wide supply voltage range, 8mA drive capability, and extended temperature performance from –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 (12.80mm × 7.52mm) 2.0V to 5.5V

Device Classification Enhanced Product Octal Bus Transceiver with 3-State Outputs

Part Number: SN74AHC245MDWREP

Mounting Type: Surface Mount

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

PRODUCT OVERVIEW

What Is the SN74AHC245MDWREP?

SN74AHC245MDWREP is an Enhanced Product octal bus transceiver from Texas Instruments designed for asynchronous two-way communication between data buses.[reference:60] The device features 3-state outputs and operates over a wide supply voltage range of 2.0V to 5.5V.[reference:61][reference:62]

The SN74AHC245MDWREP is part of TI's Enhanced Product (EP) line, offering controlled baseline fabrication and assembly, extended product change notification (PCN), extended temperature performance from –55°C to +125°C, product traceability, and long product life cycles.[reference:63] The device provides 8mA source and sink current capability with a typical propagation delay of 6.5ns at 5V with a 15pF load.[reference:64] The quiescent supply current is typically 40µA.[reference:65]

The device is available in a 20-pin SOIC package (DW) with a 12.80mm × 7.52mm body size.[reference:66][reference:67] Rated for operation from –55°C to +125°C, the device is RoHS compliant, REACH unaffected, and in active production.[reference:68][reference:69] The device is supplied in tape-and-reel packaging with 2,000 units per reel.[reference:70]

Enhanced Product (EP) Controlled baseline fabrication, extended PCN, extended temperature performance (–55°C to +125°C), and long product life cycles.[reference:71]

Wide Supply Voltage Range 2.0V to 5.5V supply voltage with 8mA drive capability for flexible system integration.[reference:72]

High-Speed Performance 6.5ns typical propagation delay at 5V with 15pF load for high-speed bus applications.[reference:73]

DEVICE HIGHLIGHTS

Key Features and Benefits of SN74AHC245MDWREP

Enhanced Product (EP) Qualification

Controlled baseline fabrication and assembly, extended product change notification (PCN), extended temperature performance (–55°C to +125°C), product traceability, and long product life cycles.[reference:74]

Bidirectional Data Flow

Designed for asynchronous two-way communication between data buses with 3-state outputs for bus-oriented applications.[reference:75]

High-Speed Performance

Typical propagation delay of 6.5ns at 5V with 15pF load, enabling high-speed data transfer in demanding applications.[reference:76]

Wide Operating Voltage Range

Operates from 2.0V to 5.5V, accommodating a broad spectrum of applications and providing flexibility in mixed-voltage systems.[reference:77]

Extended Temperature Range

Rated for operation from –55°C to +125°C, making it suitable for harsh industrial, automotive, and military applications.[reference:78]

Standard 20-Lead SOIC Package

Available in a 20-lead SOIC package with a 12.80mm × 7.52mm footprint, ideal for standard PCB layouts.[reference:79][reference:80]

REFERENCE DATA

Technical Specifications for SN74AHC245MDWREP

Part Number	SN74AHC245MDWREP	Manufacturer	Texas Instruments
Device Type	Enhanced Product Octal Bus Transceiver	Logic Type	Transceiver, Non-Inverting[reference:81][reference:82]
Supply Voltage Range	2.0V to 5.5V[reference:83][reference:84]	Number of Elements	1[reference:85]
Bits per Element	8[reference:86]	Output Type	3-State[reference:87]
Output Current (High)	8mA[reference:88]	Output Current (Low)	8mA[reference:89]
Propagation Delay (Typical)	6.5ns @ 5V, 15pF[reference:90]	Quiescent Supply Current	40µA[reference:91]
Package / Case	20-SOIC (0.295", 7.50mm Width)[reference:92]	Supplier Device Package	20-SOIC[reference:93]
Package Body Size	12.80mm × 7.52mm[reference:94][reference:95]	Pin Count	20
Mounting Type	Surface Mount[reference:96]	Operating Temperature	-55°C to +125°C[reference:97]
Series	74AHC[reference:98]	Product Status	Active[reference:99]
Features	Power-Off Isolation, Output Enable[reference:100]	Technology	CMOS[reference:101][reference:102]
RoHS	ROHS3 Compliant[reference:103]	REACH Status	REACH Unaffected[reference:104]
Moisture Sensitivity Level	MSL 1 – Unlimited[reference:105]	ECCN	EAR99[reference:106]
Packaging	Tape & Reel (2,000 per Reel)[reference:107]	Polarity	Non-Inverting[reference:108]

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.

DESIGN REFERENCE

Circuit Considerations for SN74AHC245MDWREP

Power Supply & Signal Direction Control

The SN74AHC245MDWREP is an octal bus transceiver with 3-state outputs:

Supply Voltage: Operates from 2.0V to 5.5V, providing flexibility in mixed-voltage systems[reference:109]
Direction Control: DIR pin controls the direction of data flow (A-to-B or B-to-A)
Output Enable: OE pin enables or disables the outputs (3-state)[reference:110]
Power-Off Isolation: Prevents backflow current when the device is powered down[reference:111]
Extended Temperature: Rated for –55°C to +125°C for harsh environment applications[reference:112]

PCB and System-Level Guidance

Bus transceiver performance depends on layout and system design:

Decoupling Capacitors: Place a 0.1µF ceramic capacitor close to the V_CC pin for stable operation
Unused Inputs: Tie unused inputs to V_CC or GND to prevent floating inputs
Bus Termination: Consider series termination resistors for high-speed bus applications
PCB Layout: Keep bus traces short and matched for improved signal integrity
Verify the recommended PCB footprint from the official datasheet prior to production

20-LEAD SOIC (12.80mm × 7.52mm)

Pin Configuration Reference for SN74AHC245MDWREP

AHC245

SOIC TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The SOIC package has 20 pins with a 12.80mm × 7.52mm body size.[reference:113][reference:114]

1 DIR Direction Control - High = A-to-B, Low = B-to-A

2 A1 Port A I/O - Channel 1

3 A2 Port A I/O - Channel 2

4 A3 Port A I/O - Channel 3

5 A4 Port A I/O - Channel 4

6 A5 Port A I/O - Channel 5

7 A6 Port A I/O - Channel 6

8 A7 Port A I/O - Channel 7

9 A8 Port A I/O - Channel 8

10 GND Ground

11 B8 Port B I/O - Channel 8

12 B7 Port B I/O - Channel 7

13 B6 Port B I/O - Channel 6

14 B5 Port B I/O - Channel 5

15 B4 Port B I/O - Channel 4

16 B3 Port B I/O - Channel 3

17 B2 Port B I/O - Channel 2

18 B1 Port B I/O - Channel 1

19 V_CC Supply Voltage - 2.0V to 5.5V

20 OE Output Enable - Low = Outputs Enabled, High = 3-State

APPLICATION AREAS

Typical Applications for SN74AHC245MDWREP

Industrial Control Systems

Extended temperature range (–55°C to +125°C) makes it suitable for harsh industrial automation and control applications.[reference:115]

MCU-to-Peripheral Interfacing

Bidirectional communication between microcontrollers and peripheral devices in industrial and embedded systems.[reference:116]

Military & Aerospace

Enhanced Product qualification with extended temperature performance and long product life cycles for mission-critical applications.[reference:117]

Level Shifting Applications

Level shifting between 3.3V and 5V systems with 8mA drive capability for robust signal transmission.

Automotive Electronics

Extended temperature range and robust design suitable for automotive applications requiring high reliability.

Data Bus Systems

Designed for asynchronous two-way communication between data buses in various digital systems.[reference:118]

REPLACEMENT GUIDANCE

Selecting an Alternative for SN74AHC245MDWREP

A replacement for the SN74AHC245MDWREP 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 product pages and datasheets.

Channels: 8-bit bidirectional

Supply voltage: 2.0V–5.5V

Output current: ±8mA

Propagation delay: 6.5ns (typical)

Package: 20-SOIC

Temperature range: –55°C to 125°C

Qualification: Enhanced Product (EP)

Output type: 3-State

Family alternatives (same function, different package or grade):

Part Number	Package	Qualification	Packaging	Carrier Quantity
SN74AHC245MDWREP	20-SOIC	Enhanced Product (EP)	Tape & Reel	2,000[reference:119]
SN74AHC245DWR	20-SOIC	Standard (Commercial)	Tape & Reel	2,000[reference:120]
SN74AHC245PW	20-TSSOP	Standard (Commercial)	Tape & Reel	2,000[reference:121]
SN74AHC245QPWRQ1	20-TSSOP	AEC-Q100 (Automotive)	Tape & Reel	2,000[reference:122]

All alternative part numbers listed above are documented in the official Texas Instruments product pages. The SN74AHC245MDWREP is the Enhanced Product version in a 20-SOIC package with extended temperature performance (–55°C to +125°C) and tape-and-reel packaging (2,000 units per reel).[reference:123] For commercial-grade applications in the same package, consider SN74AHC245DWR. For a smaller TSSOP package, consider SN74AHC245PW. For AEC-Q100 qualified automotive applications, consider SN74AHC245QPWRQ1.[reference:124] Select based on qualification, package, and temperature requirements.

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MANUFACTURER INFORMATION

Texas Instruments

The SN74AHC245 (SN74AHC245MDWREP) belongs to the SN74AHC245-EP family of octal bus transceivers from Texas Instruments. The device features 3-state outputs and is designed for asynchronous two-way communication between data buses.[reference:125] The Enhanced Product (EP) line offers controlled baseline fabrication and assembly, extended PCN, extended temperature performance (–55°C to +125°C), product traceability, and long product life cycles for demanding applications.[reference:126]

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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: SN74AHC245MDWREP

Manufacturer: Texas Instruments

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

Series: 74AHC

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

Packaging: Tape & Reel (TR)

Product Status: Active

Logic Type: Transceiver, Non-Inverting

Number of Elements: 1

Number of Bits per Element: 8

Input Type: -

Output Type: 3-State

Current - Output High, Low: 8mA, 8mA

Voltage - Supply: 2V ~ 5.5V

Operating Temperature: -55°C ~ 125°C (TA)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 20-SOIC

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Part Number: SN74AHC245MDWREP

Manufacturer: Texas Instruments

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

Category: Buffers, Drivers, Receivers, Transceivers

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