SN74ALS648ANT Equivalent & Substitute Parts

Part Overview

The SN74ALS648ANT is an inverting transceiver IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This device operates within a 4.5V to 5.5V supply voltage range and is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part is housed in a 24-pin DIP package suitable for through-hole mounting applications.

Substiute Parts

SN74ALS648ANT

Texas InstrumentsIn Stock: 1217SN74ALS648ANT Datasheet

Current PartRFQ

SN74ALS648ADW

Texas InstrumentsIn Stock: 1025SN74ALS648ADW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS648ANT is determined by the following critical parameters that must remain constant across equivalent parts:

• Logic Type: Transceiver, Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 15mA, 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Base Product Number: 74ALS648
• RoHS Status: ROHS3 Compliant

The SN74ALS648ADW qualifies as a direct functional substitute, maintaining identical electrical specifications and logic characteristics. The primary difference is the package format: the substitute uses surface-mount 24-SOIC packaging instead of through-hole 24-DIP packaging. Both parts share the same base product number (74ALS648) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS648ADW is the manufacturer-recommended substitute for the obsolete SN74ALS648ANT. Both parts maintain identical electrical specifications, logic functionality, and compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99 classification). The substitute part carries active product status, ensuring continued availability and manufacturing support.

Selection between these parts depends on circuit board design requirements. The SN74ALS648ANT is suitable for through-hole PCB designs, while the SN74ALS648ADW accommodates surface-mount assembly processes. Both parts operate within the same voltage and temperature ranges and deliver equivalent current output specifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS648ADW directly replace the SN74ALS648ANT in existing designs?

A: Electrical and functional compatibility is complete. However, the package format differs: the main part uses 24-DIP through-hole packaging, while the substitute uses 24-SOIC surface-mount packaging. PCB layout and assembly method must accommodate the selected package type.

Q: What is the significance of the product status difference?

A: The SN74ALS648ANT is classified as obsolete, indicating discontinued manufacturing. The SN74ALS648ADW maintains active product status, ensuring ongoing availability, manufacturing support, and compliance with current standards.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both parts share identical logic type (Transceiver, Inverting), bit configuration (1 element, 8 bits per element), output type (3-State), current ratings (15mA high, 24mA low), supply voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C).

Q: What compliance certifications apply to both parts?

A: Both the SN74ALS648ANT and SN74ALS648ADW are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (Unlimited) for both parts.

Q: How do the package dimensions compare?

A: The SN74ALS648ANT uses 24-DIP packaging with 0.300" (7.62mm) pitch. The SN74ALS648ADW uses 24-SOIC packaging with 0.295" (7.50mm) width. Both packages accommodate the same pin count and electrical interface.