SN74HC640PWT Equivalent & Substitute Parts

Part Overview

The SN74HC640PWT is a logic transceiver IC featuring inverting functionality with 1 element and 8 bits per element, designed for 3-state output applications. Manufactured by Texas Instruments in the 74HC series, this component operates across a 2V to 6V supply voltage range and is housed in a 20-TSSOP surface mount package.

The SN74HC640PWT is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this specific transceiver configuration.

Substiute Parts

SN74HC640PWT

Texas InstrumentsIn Stock: 1167SN74HC640PWT Datasheet

Current PartRFQ

SN74HC640PWR

Texas InstrumentsIn Stock: 8863SN74HC640PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC640PWT are identified based on strict parametric equivalence across the following critical criteria:

• Logic type and functional configuration (Transceiver, Inverting)
• Element and bit-per-element count (1 element, 8 bits per element)
• Output type (3-State)
• Output current specifications (7.8mA, 7.8mA)
• Supply voltage range (2V ~ 6V)
• Operating temperature range (-40°C ~ 85°C)
• Package type and physical dimensions (20-TSSOP)
• Compliance certifications (ROHS3, MSL Level 1)

The SN74HC640PWR qualifies as a parametric equivalent based on identical electrical specifications and package configuration. The primary distinction is packaging format: the SN74HC640PWT is supplied in tube packaging, while the SN74HC640PWR is supplied in Tape & Reel (TR) format.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC640PWR serves as the direct parametric equivalent for the discontinued SN74HC640PWT. Both parts maintain identical electrical characteristics, thermal specifications, and compliance certifications. The SN74HC640PWR is currently in active production status, ensuring ongoing availability.

Selection between these parts depends on packaging requirements. The SN74HC640PWR in Tape & Reel format is suitable for high-volume automated assembly processes. For applications requiring tube packaging or lower-volume procurement, alternative sourcing channels for the SN74HC640PWT may be evaluated, though the SN74HC640PWR remains the recommended substitute given its active product status.

Both parts satisfy ROHS3 compliance and MSL Level 1 requirements, confirming suitability for standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC640PWR directly replace the SN74HC640PWT in existing designs?

A: Yes. The SN74HC640PWR is electrically and functionally identical to the SN74HC640PWT. Both parts feature the same transceiver inverting logic configuration, 8-bit element structure, 3-state output, supply voltage range, and operating temperature specifications. The 20-TSSOP package dimensions are identical, enabling direct PCB-level substitution.

Q: What is the difference between the SN74HC640PWT and SN74HC640PWR?

A: The primary difference is packaging format. The SN74HC640PWT is supplied in tube packaging, while the SN74HC640PWR is supplied in Tape & Reel (TR) format. All electrical and mechanical specifications are identical.

Q: Why is the SN74HC640PWT discontinued?

A: The SN74HC640PWT has been discontinued at DiGi Electronics. The SN74HC640PWR remains in active production and serves as the current equivalent offering from Texas Instruments.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the SN74HC640PWT and SN74HC640PWR carry identical ROHS3 compliance status and MSL Level 1 moisture sensitivity ratings. Both are suitable for standard manufacturing environments.

Q: What packaging format should I select for my application?

A: Tape & Reel (TR) packaging, as provided with the SN74HC640PWR, is standard for automated assembly and high-volume production. Tube packaging is typically used for manual assembly or lower-volume applications. For new designs, Tape & Reel format is recommended due to active product availability.