74VHCT245AMTC Equivalent & Substitute Parts

Part Overview

The 74VHCT245AMTC is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-TSSOP surface mount package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VHCT245AMTC
Manufacturer	onsemi
Series	74VHCT
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	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74VHCT245AMTC is determined by the following critical parameters:

Core Functional 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: 4.5V ~ 5.5V
Package / Case: 20-TSSOP (0.173", 4.40mm Width)

Substitution Categories:

Direct Manufacturer Equivalents maintain identical electrical and mechanical specifications with variations only in packaging format (Tape & Reel vs. Tube) or product status (Active vs. Obsolete). These include MC74VHCT245ADTRG and MC74VHCT245ADTG from onsemi.

Parametric Equivalents share all critical electrical parameters and package dimensions but may differ in logic function subcategory (Buffer vs. Transceiver) or manufacturer. MC74VHCT541ADTG functions as a buffer with identical electrical specifications.

Cross-Manufacturer Direct Substitutes from Texas Instruments (SN74AHCT245PW, SN74AHCT245PWR) and Nexperia (74AHCT245PW,118, 74VHCT245PW,118) maintain the same logic type, element count, bit width, output type, and package dimensions. These parts are active in production and offer extended operating temperature ranges (-40°C ~ 125°C).

Similar Parts with Package Variation such as SN74AHCT245DBR use a 20-SSOP package (0.209", 5.30mm Width) instead of 20-TSSOP, requiring PCB layout modification.

Extended Current Output Parts like SN74LV245ATPW provide higher output current (16mA, 16mA) while maintaining all other core parameters, suitable for applications requiring increased drive capability.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Voltage (V)	Temp Range (°C)	Package	Status
74VHCT245AMTC	onsemi	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 85	20-TSSOP	Obsolete
MC74VHCT245ADTRG	onsemi	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 85	20-TSSOP	Active
MC74VHCT245ADTG	onsemi	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 85	20-TSSOP	Active
MC74VHCT541ADTG	onsemi	Buffer, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 85	20-TSSOP	Active
SN74AHCT245PW	Texas Instruments	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 125	20-TSSOP	Discontinued
SN74AHCT245PWR	Texas Instruments	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 125	20-TSSOP	Active
SN74LV245ATPW	Texas Instruments	Transceiver, Non-Inverting	1	8	3-State	16, 16	4.5 ~ 5.5	-40 ~ 125	20-TSSOP	Last Time Buy
74AHCT245PW,118	Nexperia USA Inc.	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 125	20-TSSOP	Active
74VHCT245PW,118	Nexperia USA Inc.	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 125	20-TSSOP	Active
74AHCT245PW-Q100J	Nexperia USA Inc.	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 125	20-TSSOP	Active
SN74AHCT245DBR	Texas Instruments	Transceiver, Non-Inverting	1	8	3-State	8, 8	4.5 ~ 5.5	-40 ~ 125	20-SSOP	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: MC74VHCT245ADTRG or MC74VHCT245ADTG from onsemi provide the most direct substitution path. Both maintain identical electrical specifications and 20-TSSOP packaging. MC74VHCT245ADTRG is available in Tape & Reel format with 2200 pcs in stock, while MC74VHCT245ADTG is supplied in Tube format with 1598 pcs in stock. Both parts are active in production and ROHS3 compliant.

Cross-Manufacturer Active Alternatives: SN74AHCT245PWR from Texas Instruments offers active production status with extended operating temperature range (-40°C ~ 125°C) and 5200 pcs inventory availability. 74AHCT245PW,118 and 74VHCT245PW,118 from Nexperia USA Inc. provide equivalent specifications with active status and extended temperature range. These parts are suitable for new designs requiring long-term supply assurance.

Automotive-Grade Option: 74AHCT245PW-Q100J from Nexperia USA Inc. includes AEC-Q100 automotive qualification with 3277 pcs in stock, appropriate for automotive or high-reliability applications.

Extended Current Output: SN74LV245ATPW from Texas Instruments provides doubled output current (16mA, 16mA) while maintaining all other core parameters. This part is classified as Last Time Buy and suitable only for designs where increased drive capability is required.

Package Variation Consideration: SN74AHCT245DBR uses 20-SSOP packaging (0.209", 5.30mm Width) instead of 20-TSSOP, requiring PCB layout modification. This substitution is valid only when PCB redesign is feasible.

All recommended substitutes maintain ROHS3 compliance and MSL 1 rating. Selection should prioritize active production status and inventory availability for supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MC74VHCT245ADTRG directly replace 74VHCT245AMTC without PCB modification? A: Yes. MC74VHCT245ADTRG maintains identical electrical specifications (8mA output current, 4.5V ~ 5.5V supply, -40°C ~ 85°C operating range) and 20-TSSOP package dimensions. The only difference is packaging format (Tape & Reel vs. standard packaging) and active production status. No PCB layout changes are required.

Q: What is the difference between 74AHCT245 and 74VHCT245 series parts? A: Both series provide identical transceiver functionality with 8-bit, 3-state output in 20-TSSOP packaging. The primary difference is manufacturer and product status. 74VHCT series is from onsemi, while 74AHCT series is from Texas Instruments or Nexperia. Cross-series substitution is valid based on matching electrical parameters.

Q: Why does SN74LV245ATPW have higher output current (16mA vs. 8mA)? A: SN74LV245ATPW is from the 74LV series, which features enhanced drive capability. While this part maintains all other core parameters (logic type, element count, bit width, 3-state output, voltage range, package), the increased output current makes it suitable only for applications requiring higher drive strength. This is a parametric upgrade, not a direct equivalent.

Q: Can I use SN74AHCT245DBR as a substitute? A: SN74AHCT245DBR is functionally equivalent but uses 20-SSOP packaging (0.209", 5.30mm Width) instead of 20-TSSOP (0.173", 4.40mm Width). PCB layout modification is required. This substitution is valid only when redesign is feasible and the wider package footprint can be accommodated.

Q: What does "Last Time Buy" status mean for SN74LV245ATPW? A: Last Time Buy indicates the manufacturer has announced end-of-life for this part. While currently available, inventory will not be replenished after existing stock is depleted. This part should be used only for legacy designs or when extended output current is specifically required. For new designs, select active production alternatives.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original 74VHCT245AMTC specifications.

Q: Which substitute offers the best long-term supply assurance? A: SN74AHCT245PWR from Texas Instruments and 74AHCT245PW,118 from Nexperia USA Inc. both have active production status with substantial inventory (5200 pcs and 2000 pcs respectively). These parts are recommended for new designs requiring extended production support.

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