74HC259DB,118 Equivalent & Substitute Parts

Part Overview

The 74HC259DB,118 is an 8-bit addressable latch logic IC manufactured by Nexperia USA Inc. in a 16-SSOP surface mount package. This component functions as a D-Type, addressable latch with a 1:8 circuit configuration and standard output type, operating across a 2V to 6V supply voltage range. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74HC259DB,118

Nexperia USA Inc.In Stock: 72174HC259DB,118 Datasheet

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74HC259PW,118

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

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SN74HC259PWR

Texas InstrumentsIn Stock: 132433SN74HC259PWR Datasheet

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SN74HC259PWT

Texas InstrumentsIn Stock: 3096SN74HC259PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC259DB,118 is determined by the following critical parameters:

Functional Equivalence Requirements:

• Logic Type: D-Type, Addressable
• Circuit Configuration: 1:8
• Output Type: Standard
• Voltage - Supply: 2V ~ 6V
• Independent Circuits: 1

Electrical Compatibility Requirements:

• Current - Output High, Low: 5.2mA, 5.2mA
• Delay Time - Propagation: Must not exceed 17ns
• Operating Temperature: Must support -40°C ~ 125°C range

Physical & Compliance Requirements:

• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped based on package type variations (16-SSOP vs. 16-TSSOP) and manufacturer source, while maintaining identical functional and electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

74HC259PW,118 (Nexperia USA Inc.) This substitute maintains identical electrical and thermal specifications to the main part while offering active product status. The 16-TSSOP package is a narrower variant of the 16-SSOP, requiring PCB layout adjustment. This part is available in high volume (7608 Pcs in stock) and is the direct Nexperia equivalent.

SN74HC259PWR (Texas Instruments) This Texas Instruments alternative provides superior propagation delay performance (13ns vs. 17ns) and maintains all critical electrical parameters. The operating temperature range is limited to -40°C ~ 85°C, which may not satisfy applications requiring the full -40°C ~ 125°C range of the original part. This part has the highest inventory availability (132400 Pcs in stock) and active product status.

SN74HC259PWT (Texas Instruments) This variant offers identical electrical performance to SN74HC259PWR with the same propagation delay advantage (13ns). Product status is listed as discontinued at DiGi Electronics, with limited inventory (2987 Pcs). The operating temperature limitation (-40°C ~ 85°C) applies equally to this part.

Selection should prioritize 74HC259PW,118 for applications requiring the full -40°C ~ 125°C operating range, or SN74HC259PWR for applications within -40°C ~ 85°C where improved propagation delay is beneficial. All substitutes require PCB layout modification due to package width differences (16-SSOP to 16-TSSOP transition).

Frequently Asked Questions (FAQ)

Q: Can the 74HC259PW,118 directly replace the 74HC259DB,118 without circuit modification? A: Electrical functionality is identical. However, the package change from 16-SSOP (0.209" width) to 16-TSSOP (0.173" width) requires PCB footprint adjustment. Pin count and signal assignments remain unchanged.

Q: What is the significance of the propagation delay difference between the Nexperia and Texas Instruments parts? A: The 74HC259PW,118 maintains 17ns propagation delay matching the original specification. SN74HC259PWR and SN74HC259PWT offer 13ns delay, which is faster and remains within acceptable timing margins for most applications. This improvement does not create compatibility issues.

Q: Are there operating temperature limitations when substituting with Texas Instruments parts? A: SN74HC259PWR and SN74HC259PWT are rated for -40°C ~ 85°C, which is narrower than the original -40°C ~ 125°C range. Applications requiring operation above 85°C must use 74HC259PW,118 or verify that the design does not exceed the Texas Instruments temperature limit.

Q: What packaging considerations apply to these substitutes? A: All substitutes use 16-TSSOP surface mount packages with 0.173" width, compared to the original 16-SSOP at 0.209" width. This requires PCB layout redesign. Tape & Reel and Cut Tape packaging options affect procurement and handling but do not impact electrical performance.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitutes maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH unaffected status, matching the original part's regulatory certifications.

Q: Which substitute offers the best availability? A: SN74HC259PWR (Texas Instruments) has the highest inventory at 132400 Pcs in stock with active product status, providing the most reliable long-term supply assurance.