74AC373MTCX D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74AC373MTCX is a D-Type Transparent Latch IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output in a 20-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply voltage range with a 7ns propagation delay and 24mA output current capability.

Substiute Parts

74AC373MTCX

onsemiIn Stock: 225874AC373MTCX Datasheet

Current PartRFQ

MC74AC373DTR2G

onsemiIn Stock: 4031MC74AC373DTR2G Datasheet

DirectRFQ

SN74AC373PW

Texas InstrumentsIn Stock: 994SN74AC373PW Datasheet

DirectRFQ

SN74AC373PWR

Texas InstrumentsIn Stock: 50222SN74AC373PWR Datasheet

DirectRFQ

74AHC373PW,118

Nexperia USA Inc.In Stock: 100574AHC373PW,118 Datasheet

SimilarRFQ

SN74AC373DBR

Texas InstrumentsIn Stock: 953SN74AC373DBR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC373MTCX is determined by strict alignment of the following critical parameters:

Direct Substitutes (Functionally Equivalent):

• Same logic type: D-Type Transparent Latch
• Same circuit configuration: 8:8
• Same output type: Tri-State
• Compatible supply voltage range: 2V ~ 6V
• Same package type: 20-TSSOP
• Propagation delay within acceptable tolerance: 7ns to 7.5ns
• Output current capability: 24mA minimum

Similar Substitutes (Alternative Series):

• Same logic type and circuit configuration
• Different series designation (74AHC vs 74AC)
• Different package variant (20-SSOP vs 20-TSSOP)
• Modified electrical characteristics (voltage range, propagation delay, output current)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MC74AC373DTR2G

The MC74AC373DTR2G from onsemi is the optimal direct substitute for the obsolete 74AC373MTCX. Both parts share identical electrical specifications, package type (20-TSSOP), and operating parameters. The MC74AC373DTR2G maintains active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Propagation delay increases marginally from 7ns to 7.5ns, remaining within acceptable tolerance for most applications.

Secondary Recommendation: SN74AC373PWR

The SN74AC373PWR from Texas Instruments provides an active alternative with identical electrical characteristics and 20-TSSOP packaging. This part offers the highest inventory availability (50,200 pcs) and active product status. Packaging format differs as Cut Tape (CT) & Digi-Reel® versus the original Tape & Reel (TR) format. ROHS3 compliance and MSL 1 rating match the primary recommendation.

Alternative Recommendation: SN74AC373DBR

The SN74AC373DBR from Texas Instruments maintains full electrical compatibility with the original part but uses a 20-SSOP package (0.209", 5.30mm width) instead of 20-TSSOP (0.173", 4.40mm width). This package variant requires PCB layout modification and is suitable only when board redesign is acceptable. Active product status and ROHS3 compliance are confirmed.

Series Alternative: 74AHC373PW,118

The 74AHC373PW,118 from Nexperia USA Inc. represents a different logic series (74AHC) with enhanced performance characteristics: 4ns propagation delay (faster than original), extended operating temperature range (-40°C to 125°C), and improved temperature stability. However, output current capability is reduced to 8mA (versus 24mA), and supply voltage range is narrower (2V ~ 5.5V). This part is suitable only for applications where reduced output current and narrower voltage range are acceptable.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74AC373MTCX with MC74AC373DTR2G without circuit modification?

A: Yes. Both parts are electrically identical with matching supply voltage (2V ~ 6V), output current (24mA), operating temperature range (-40°C ~ 85°C), and 20-TSSOP package. The 0.5ns increase in propagation delay (7ns to 7.5ns) is negligible for most digital logic applications.

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: The 20-TSSOP package has a width of 0.173" (4.40mm), while the 20-SSOP package has a width of 0.209" (5.30mm). These are physically different packages requiring different PCB footprints. SN74AC373DBR uses the wider 20-SSOP package and requires board redesign if substituted.

Q: Why does 74AHC373PW,118 have lower output current (8mA vs 24mA)?

A: The 74AHC series uses advanced CMOS technology optimized for lower power consumption and faster switching speeds. The reduced output current reflects this design approach. Verify that your application can operate with 8mA output current before selecting this alternative.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (MC74AC373DTR2G, SN74AC373PWR, SN74AC373DBR, and 74AHC373PW,118) carry ROHS3 compliance certification. The original 74AC373MTCX does not specify RoHS status due to its obsolete classification.

Q: Which substitute has the best long-term availability?

A: SN74AC373PWR from Texas Instruments shows the highest inventory level (50,200 pcs) and active product status, indicating strong long-term availability. MC74AC373DTR2G from onsemi (3,969 pcs in stock) is the second choice for sustained supply.

Q: Can I use 74AHC373PW,118 in a 6V application?

A: No. The 74AHC373PW,118 has a maximum supply voltage of 5.5V, making it unsuitable for applications requiring 6V operation. Stick with 74AC series substitutes (MC74AC373DTR2G, SN74AC373PWR, or SN74AC373DBR) for full 2V ~ 6V voltage range compatibility.