SN74AHC245MPWREP Equivalent & Substitute Parts

Part Overview

The SN74AHC245MPWREP is a non-inverting bus transceiver manufactured by Texas Instruments, designed for 8-bit data transfer with 3-state output capability. This logic IC operates across a supply voltage range of 2V to 5.5V and is housed in a 20-TSSOP surface mount package. The device is currently in active product status with 708 units in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements call for alternative manufacturers or package configurations while maintaining functional equivalence.

Key Parameters

Parameter	Value
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	8mA, 8mA
Voltage - Supply	2V ~ 5.5V
Operating Temperature Range	-55°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Base Product Number	74AHC245
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHC245MPWREP is determined by the following critical parameters:

Mandatory Matching Parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 8mA, 8mA
Voltage - Supply: 2V ~ 5.5V
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount

Allowable Variations:

Operating Temperature Range: May be narrower than the main part (-40°C ~ 125°C or -40°C ~ 85°C acceptable)
Manufacturer: Different manufacturers permitted (Texas Instruments, Nexperia USA Inc., onsemi, Fairchild Semiconductor)
Base Product Number: 74AHC245 or 74VHC245 series acceptable
Product Status: Active or Obsolete acceptable for substitution purposes
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® acceptable

Non-Substitutable Variations:

Package type changes (20-TSSOP to 20-SOIC not acceptable for direct substitution)
Reduced output current capability
Reduced supply voltage range
Different logic configuration or bit width

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Operating Temp (°C)	Package	Output Current (mA)	Supply Voltage (V)	Inventory
SN74AHC245MPWREP	Texas Instruments	74AHC	Active	-55 ~ 125	20-TSSOP	8, 8	2 ~ 5.5	708
74AHC245PW,112	Nexperia USA Inc.	74AHC	Obsolete	-40 ~ 125	20-TSSOP	8, 8	2 ~ 5.5	934
74AHC245PW,118	Nexperia USA Inc.	74AHC	Active	-40 ~ 125	20-TSSOP	8, 8	2 ~ 5.5	2432
74AHC245PW-Q100J	Nexperia USA Inc.	74AHC	Active	-40 ~ 125	20-TSSOP	8, 8	2 ~ 5.5	3500
74VHC245MTC	Fairchild Semiconductor	74VHC	Active	-40 ~ 85	20-TSSOP	8, 8	2 ~ 5.5	2704
74VHC245MTCX	onsemi	74VHC	Active	-40 ~ 85	20-TSSOP	8, 8	2 ~ 5.5	8524
74VHC245PW,118	Nexperia USA Inc.	74VHC	Active	-40 ~ 125	20-TSSOP	8, 8	2 ~ 5.5	7740
MC74VHC245DTR2G	onsemi	74VHC	Active	-40 ~ 85	20-TSSOP	8, 8	2 ~ 5.5	9633
MC74VHC245DWR2G	onsemi	74VHC	Active	-40 ~ 85	20-SOIC	8, 8	2 ~ 5.5	2147

Engineering Selection Recommendations

Primary Substitutes (74AHC Series - Recommended for Direct Replacement):

The 74AHC245PW,118 and 74AHC245PW-Q100J from Nexperia USA Inc. are the preferred substitutes. Both maintain the 74AHC base product number, identical electrical specifications, and 20-TSSOP packaging. The 74AHC245PW,118 is in active status with 2432 units available. The 74AHC245PW-Q100J carries AEC-Q100 automotive qualification with 3500 units in stock, suitable for applications requiring automotive-grade components.

Secondary Substitutes (74VHC Series - Functional Equivalents):

The 74VHC245 series parts (74VHC245PW,118, 74VHC245MTCX, and MC74VHC245DTR2G) provide functional equivalence with identical electrical performance and packaging. These parts operate within a narrower temperature range (-40°C to 85°C) compared to the main part's -55°C to 125°C specification. Selection from this series is appropriate when the application's operating temperature requirements fall within -40°C to 85°C. The 74VHC245PW,118 from Nexperia offers the highest inventory availability at 7740 units.

Non-Recommended Substitutes:

The MC74VHC245DWR2G uses a 20-SOIC package instead of 20-TSSOP and is not suitable for direct substitution in designs requiring the 20-TSSOP form factor.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the main part. Moisture sensitivity levels are equivalent (MSL 1) for all 20-TSSOP variants.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 74VHC245 part for the SN74AHC245MPWREP?

A: Yes, 74VHC245 series parts are functionally equivalent substitutes provided your application operates within the -40°C to 85°C temperature range. The 74VHC245 series maintains identical electrical specifications, output current ratings, supply voltage range, and 20-TSSOP packaging. If your design requires operation below -40°C or above 85°C, use 74AHC245 series substitutes instead.

Q: What is the difference between 74AHC245 and 74VHC245 series?

A: Both series provide identical transceiver functionality with matching electrical performance. The primary difference is operating temperature range: 74AHC245 supports -55°C to 125°C, while 74VHC245 supports -40°C to 85°C. Select based on your application's thermal requirements.

Q: Are all substitute parts available in 20-TSSOP packaging?

A: All recommended substitutes except MC74VHC245DWR2G are available in 20-TSSOP packaging. The MC74VHC245DWR2G uses 20-SOIC packaging and requires PCB layout modifications; it is not a direct substitute.

Q: Does the 74AHC245PW-Q100J automotive qualification affect its use in non-automotive applications?

A: No. The AEC-Q100 qualification indicates the part meets automotive industry standards and is suitable for automotive applications. It functions identically to non-qualified variants in non-automotive designs and may be used interchangeably.

Q: What packaging formats are available for substitutes?

A: Substitutes are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. Both formats contain identical components; packaging format selection depends on your procurement and assembly process requirements.

Q: Can I use an obsolete part like 74AHC245PW,112 as a substitute?

A: The 74AHC245PW,112 is functionally equivalent and electrically identical to the main part. However, obsolete status indicates the manufacturer has discontinued production. While 934 units are currently in stock, future availability is not guaranteed. Prioritize active status parts for new designs.

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