SN74ALS253DR Equivalent & Substitute Parts

Part Overview

The SN74ALS253DR is a dual 4:1 multiplexer logic integrated circuit manufactured by Texas Instruments in the 74ALS series. This component functions as a data selector, routing one of four input signals to a single output based on binary select lines. The device is actively produced and widely used in digital logic applications requiring signal multiplexing in compact form factors.

Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits component optimization across manufacturing batches and supplier channels.

Substiute Parts

SN74ALS253DR

Texas InstrumentsIn Stock: 972SN74ALS253DR Datasheet

Current PartRFQ

SN74ALS153DR

Texas InstrumentsIn Stock: 3447SN74ALS153DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS253DR is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Dual 4:1 multiplexer topology (2 x 4:1)
• Package Type: 16-SOIC surface mount package with 0.154" width (3.90mm)
• Electrical Specifications: Single supply voltage range 4.5V ~ 5.5V; output current ratings 2.6mA (high) and 24mA (low)
• Operating Temperature: 0°C ~ 70°C range
• Compliance Standards: ROHS3 compliance and MSL Level 1 rating

The SN74ALS153DR qualifies as a parametric equivalent because it maintains identical specifications across all these critical dimensions. Both parts belong to the Texas Instruments 74ALS logic family and share the same functional behavior, electrical performance, and physical form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the SN74ALS253DR and SN74ALS153DR are active products from Texas Instruments with identical electrical and mechanical specifications. Selection between these parts may be based on:

• Inventory Availability: The SN74ALS153DR currently maintains higher stock levels (3390 pcs) compared to the SN74ALS253DR (952 pcs), making it suitable for high-volume procurement or extended lead-time mitigation.
• Compliance Status: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in restricted substance applications.
• Supply Chain Continuity: Either part provides equivalent functional performance and can be used interchangeably without circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS153DR be used as a direct replacement for the SN74ALS253DR?

A: Yes. Both parts are parametric equivalents with identical circuit configuration (2 x 4:1 multiplexer), package type (16-SOIC), electrical specifications (4.5V ~ 5.5V supply, 2.6mA/24mA output current), and operating temperature range (0°C ~ 70°C). No circuit modifications or board layout changes are required.

Q: Are there any differences in pin configuration between these parts?

A: No differences exist. Both parts use the 16-SOIC package with identical pin assignments and functional behavior.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the SN74ALS253DR and SN74ALS153DR are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (unlimited) moisture sensitivity ratings.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection may be based on current inventory availability, supplier lead times, or existing component qualification within your supply chain.

Q: Are there any thermal or electrical performance differences?

A: No. Both parts operate within identical voltage supply ranges (4.5V ~ 5.5V), output current specifications (2.6mA high, 24mA low), and temperature ranges (0°C ~ 70°C).