74ABT640DB,112 Equivalent & Substitute Parts

Part Overview

The 74ABT640DB,112 is a logic transceiver IC manufactured by NXP Semiconductors, designed for inverting signal transmission with 8-bit per element capability and 3-state output configuration. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74ABT640DB,112

NXP SemiconductorsIn Stock: 88774ABT640DB,112 Datasheet

Current PartRFQ

SN74ABT640DBR

Texas InstrumentsIn Stock: 3265SN74ABT640DBR Datasheet

DirectRFQ

SN74ABT640PW

Texas InstrumentsIn Stock: 1151SN74ABT640PW Datasheet

MFR RecommendedRFQ

SN74ABT640PWR

Texas InstrumentsIn Stock: 1092SN74ABT640PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT640DB,112 are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Matching Parameters:

• Series: 74ABT (identical logic family)
• Logic Type: Transceiver, Inverting (identical functional configuration)
• Number of Elements: 1 (identical element count)
• Number of Bits per Element: 8 (identical bit width)
• Output Type: 3-State (identical output configuration)
• Current - Output High, Low: 32mA, 64mA (identical drive capability)
• Voltage - Supply: 4.5V ~ 5.5V (identical supply range)
• Operating Temperature: -40°C ~ 85°C (TA) (identical temperature range)
• Mounting Type: Surface Mount (identical mounting method)
• RoHS Status: ROHS3 Compliant (identical compliance)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical MSL rating)

Package Considerations: Substitute parts may utilize either 20-SSOP or 20-TSSOP packaging. Both package types maintain identical electrical performance and pin functionality while differing in physical dimensions. The 20-TSSOP variant (0.173", 4.40mm Width) represents a more compact footprint compared to the original 20-SSOP (0.209", 5.30mm Width).

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain full electrical and functional equivalence to the 74ABT640DB,112. Selection among available alternatives should be based on the following criteria:

Product Status: The 74ABT640DB,112 is obsolete. All substitute parts (SN74ABT640DBR, SN74ABT640PW, SN74ABT640PWR) are active products from Texas Instruments, ensuring long-term availability and supply chain continuity.

Compliance and Certifications: All parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1 - Unlimited), ensuring compatibility with current manufacturing and environmental standards.

Package Selection:

• SN74ABT640DBR maintains the original 20-SSOP package footprint, providing direct physical compatibility with existing PCB layouts.
• SN74ABT640PW and SN74ABT640PWR utilize the 20-TSSOP package, offering a more compact form factor suitable for space-constrained applications.

Packaging Format:

• SN74ABT640DBR is supplied in Tape & Reel (TR) format.
• SN74ABT640PW is supplied in Tube format.
• SN74ABT640PWR is supplied in Tape & Reel (TR) format.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT640DBR be used as a direct replacement for 74ABT640DB,112?

A: Yes. The SN74ABT640DBR maintains identical electrical specifications, output drive capability, supply voltage range, operating temperature range, and package dimensions (20-SSOP). Both parts are functionally equivalent transceiver ICs within the 74ABT logic family.

Q: What is the difference between SN74ABT640DBR and SN74ABT640PW?

A: Both parts are electrically identical. The primary difference is packaging: SN74ABT640DBR uses 20-SSOP (0.209", 5.30mm Width), while SN74ABT640PW uses 20-TSSOP (0.173", 4.40mm Width). The 20-TSSOP variant is physically more compact. Additionally, SN74ABT640DBR is supplied in Tape & Reel format, while SN74ABT640PW is supplied in Tube format.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts (SN74ABT640DBR, SN74ABT640PW, SN74ABT640PWR) maintain ROHS3 compliance, matching the compliance status of the original 74ABT640DB,112.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the original and all substitutes, have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use the 20-TSSOP package variant on a PCB designed for 20-SSOP?

A: No. While both packages contain identical pin counts and functionality, the physical dimensions differ. The 20-TSSOP (0.173", 4.40mm Width) is narrower than the 20-SSOP (0.209", 5.30mm Width). PCB footprints are package-specific and must match the selected component variant.

Q: What is the current output capability of these transceiver ICs?

A: All parts provide 32mA output high current and 64mA output low current, enabling direct drive of standard logic loads within the 4.5V to 5.5V supply range.

Q: Are these parts suitable for -40°C to 85°C operating environments?

A: Yes. All parts maintain the same operating temperature range of -40°C to 85°C (TA), ensuring consistent performance across industrial and commercial temperature specifications.