MM74HC259MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC259MTCX is a D-Type, Addressable 1:8 decoder/latch IC manufactured by onsemi in a 16-TSSOP surface mount package. This component functions as an 8-bit addressable latch with standard output configuration, operating across a 2V to 6V supply voltage range. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity.

Substiute Parts

MM74HC259MTCX

onsemiIn Stock: 1080MM74HC259MTCX Datasheet

Current PartRFQ

MC74HC259ADTR2G

onsemiIn Stock: 3434MC74HC259ADTR2G Datasheet

DirectRFQ

NLV74HC259ADTR2G

onsemiIn Stock: 1104NLV74HC259ADTR2G Datasheet

SimilarRFQ

74HC259PW,118

Nexperia USA Inc.In Stock: 766474HC259PW,118 Datasheet

UpgradeRFQ

M74HC259YTTR

STMicroelectronicsIn Stock: 10330M74HC259YTTR Datasheet

SimilarRFQ

SN74HC259PWR

Texas InstrumentsIn Stock: 132433SN74HC259PWR Datasheet

SimilarRFQ

SN74HC259PWT

Texas InstrumentsIn Stock: 3096SN74HC259PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC259MTCX is determined by the following critical parameters:

• Base Product Number: All substitutes must be 74HC259 variants to ensure functional equivalence
• Logic Type & Circuit Configuration: D-Type, Addressable 1:8 topology must be maintained
• Package / Case: 16-TSSOP surface mount package is mandatory for PCB compatibility
• Voltage - Supply: 2V ~ 6V operating range must be supported
• Output Type: Standard output configuration required
• Independent Circuits: Single circuit configuration (1) required

Substitutes are categorized as follows:

Direct Manufacturer Substitutes (onsemi): MC74HC259ADTR2G, NLV74HC259ADTR2G

Cross-Manufacturer Substitutes (Active Status): 74HC259PW,118 (Nexperia), M74HC259YTTR (STMicroelectronics), SN74HC259PWR (Texas Instruments)

Cross-Manufacturer Substitutes (Discontinued): SN74HC259PWT (Texas Instruments)

Parameter Comparison

Engineering Selection Recommendations

For Active Production (Recommended Priority)

1. 74HC259PW,118 (Nexperia): Active product status with matching 17ns propagation delay and identical operating temperature range (-40°C ~ 85°C) to the original MM74HC259MTCX. ROHS3 compliant. Highest inventory availability (7608 pcs).

2. SN74HC259PWR (Texas Instruments): Active product status with superior 13ns propagation delay. Extended upper operating temperature to 125°C. ROHS3 compliant. Largest inventory (132,400 pcs). Suitable for applications not requiring automotive qualification.

3. M74HC259YTTR (STMicroelectronics): Active product status with fastest 15ns propagation delay and extended temperature range (-40°C ~ 125°C). AEC-Q100 automotive qualification. ROHS3 compliant. Recommended for automotive applications.

For Continued Support (Secondary Options)

• MC74HC259ADTR2G (onsemi): Active product from original manufacturer. Extended temperature range (-55°C ~ 125°C). ROHS3 compliant. Slower propagation delay (25ns) requires timing verification.

Obsolete Alternatives (Not Recommended for New Designs)

• NLV74HC259ADTR2G (onsemi): Obsolete status. AEC-Q100 qualified. Use only if automotive qualification is mandatory and active alternatives are unavailable.
• SN74HC259PWT (Texas Instruments): Discontinued at DiGi Electronics. Use only if existing inventory is available and SN74HC259PWR is unobtainable.

Frequently Asked Questions (FAQ)

Q: Can I use any 74HC259 variant as a substitute?

A: No. The substitute must maintain the 16-TSSOP surface mount package, 2V ~ 6V supply voltage range, D-Type Addressable 1:8 logic configuration, and standard output type. Package compatibility is critical for PCB assembly.

Q: What is the impact of different propagation delays?

A: Propagation delay differences (13ns to 25ns) affect signal timing. The MM74HC259MTCX specifies 17ns. Substitutes with faster delays (13-15ns) are backward compatible. Substitutes with slower delays (25ns) require timing analysis to confirm system performance is not degraded.

Q: Are all substitutes RoHS3 compliant?

A: All active and recently discontinued substitutes listed are ROHS3 compliant. The original MM74HC259MTCX RoHS status is not specified in available documentation.

Q: Which substitute is best for automotive applications?

A: M74HC259YTTR (STMicroelectronics) or NLV74HC259ADTR2G (onsemi) are both AEC-Q100 qualified. M74HC259YTTR is preferred as it maintains active product status.

Q: Does operating temperature range affect substitution?

A: The MM74HC259MTCX operates -40°C ~ 85°C. Substitutes with extended ranges (-55°C ~ 125°C) are fully compatible. Substitutes with identical or narrower ranges are acceptable if your application does not exceed their limits.

Q: What packaging options are available?

A: All substitutes use 16-TSSOP surface mount package. Packaging formats differ (Tape & Reel, Cut Tape & Digi-Reel) but do not affect electrical compatibility—only procurement and handling logistics.

Q: Can I mix different manufacturers in the same design?

A: Yes. All listed substitutes are functionally equivalent 74HC259 variants. Cross-manufacturer substitution is standard practice in electronics design, provided electrical parameters remain within system specifications.