SN74ABT640DWR Equivalent & Substitute Parts

Part Overview

The SN74ABT640DWR is a logic transceiver IC manufactured by Texas Instruments, classified as an inverting transceiver with 1 element and 8 bits per element. The device features 3-state output capability and operates across a 4.5V to 5.5V supply voltage range. Currently in active product status with 2300 units in stock, this component is widely used in digital logic applications requiring signal inversion and bus transceiving functionality. Identifying equivalent and substitute parts becomes necessary when managing inventory constraints, addressing supply chain disruptions, or optimizing component procurement across manufacturing batches.

Substiute Parts

SN74ABT640DWR

Texas InstrumentsIn Stock: 2324SN74ABT640DWR Datasheet

Current PartRFQ

SN74ABT620DWR

Texas InstrumentsIn Stock: 716SN74ABT620DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ABT640DWR are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters: Logic type (Transceiver, Inverting), number of elements (1), bits per element (8), output type (3-State), output current specifications (32mA high, 64mA low), and supply voltage range (4.5V ~ 5.5V).

Thermal Parameters: Operating temperature range (-40°C ~ 85°C).

Physical Parameters: Package type (20-SOIC), mounting type (Surface Mount), and package dimensions (0.295", 7.50mm Width).

Compliance Parameters: RoHS3 compliance, MSL rating (1), REACH status, and ECCN classification.

The SN74ABT620DWR qualifies as a parametric equivalent based on matching all electrical, thermal, physical, and compliance specifications. The primary distinction is product status: while the SN74ABT640DWR remains active, the SN74ABT620DWR is discontinued at DiGi Electronics, with reduced inventory availability (700 units versus 2300 units).

Parameter Comparison

Engineering Selection Recommendations

The SN74ABT640DWR is the preferred primary selection due to active product status and superior inventory availability (2300 units). This ensures long-term supply chain stability and ongoing manufacturer support.

The SN74ABT620DWR serves as a parametric equivalent for applications where the SN74ABT640DWR is unavailable. Both parts maintain identical electrical, thermal, and physical specifications, ensuring functional interchangeability within the same circuit design. However, the SN74ABT620DWR carries discontinued status at DiGi Electronics with limited inventory (700 units), making it suitable only for short-term or legacy system requirements.

Both parts maintain ROHS3 compliance and MSL rating 1, confirming suitability for standard manufacturing and storage conditions. Selection between these parts should prioritize the SN74ABT640DWR for new designs and ongoing production to ensure sustained component availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Are the SN74ABT640DWR and SN74ABT620DWR electrically interchangeable?

A: Yes. Both parts share identical electrical specifications including logic type (inverting transceiver), element configuration (1 element, 8 bits per element), output type (3-State), output current ratings (32mA high, 64mA low), and supply voltage range (4.5V ~ 5.5V). They are functionally equivalent in circuit applications.

Q: What is the primary difference between these two parts?

A: The SN74ABT640DWR maintains active product status with 2300 units in stock, while the SN74ABT620DWR is discontinued at DiGi Electronics with 700 units available. Both parts are electrically and mechanically identical.

Q: Can I use the SN74ABT620DWR as a long-term replacement for the SN74ABT640DWR?

A: No. The SN74ABT620DWR is discontinued, making it unsuitable for long-term production or new designs. Use the SN74ABT640DWR for sustained supply chain requirements.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 20-SOIC package with dimensions of 0.295" × 7.50mm width, ensuring identical PCB footprint and mounting compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74ABT640DWR and SN74ABT620DWR are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level), REACH unaffected status, and EAR99 ECCN classification.