SN75477DRE4 Equivalent & Substitute Parts

Part Overview

The SN75477DRE4 is a peripheral driver IC manufactured by Texas Instruments, designed for logic applications requiring 2-element, 1-bit-per-element output capability. This device operates within a 4.5V to 5.5V supply voltage range and delivers up to 300mA output current in the low state, housed in an 8-SOIC surface mount package.

The SN75477DRE4 is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is essential for design continuity, procurement flexibility, and long-term product support. The substitute identified maintains identical electrical and mechanical specifications, ensuring direct functional replacement.

Substiute Parts

SN75477DRE4

Texas InstrumentsIn Stock: 925SN75477DRE4 Datasheet

Current PartRFQ

SN75477DR

Texas InstrumentsIn Stock: 2639SN75477DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN75477DR qualifies as a direct substitute for the SN75477DRE4 based on the following critical parameters:

• Logic Type & Architecture: Both devices are Peripheral Driver ICs with identical 2-element, 1-bit-per-element output configuration
• Electrical Performance: Matching supply voltage range (4.5V ~ 5.5V) and output current specifications (300mA low state)
• Operating Temperature Range: Identical 0°C ~ 70°C operating window
• Package & Mounting: Both use 8-SOIC surface mount packaging with identical physical dimensions (0.154", 3.90mm width)
• Compliance & Certifications: Both are ROHS3 compliant with MSL 1 rating and REACH unaffected status
• Base Product Number: Both share the SN75477 base designation, confirming core functional equivalence

The primary difference is packaging format: SN75477DRE4 is supplied in Tape & Reel (TR), while SN75477DR is available in Cut Tape (CT) & Digi-Reel® format. This distinction affects procurement and handling but does not impact electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SN75477DR is the manufacturer-recommended substitute for the discontinued SN75477DRE4. Both devices share identical electrical specifications, thermal operating range, and compliance certifications (ROHS3, REACH unaffected). The SN75477DR maintains active product status with higher inventory availability (2584 Pcs), ensuring supply chain continuity.

Selection between these parts should be based on packaging requirements: the SN75477DR in Cut Tape & Digi-Reel® format is suitable for standard component handling and automated assembly processes. Both devices are functionally interchangeable at the circuit level, with no design modifications required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the SN75477DR directly replace the SN75477DRE4 in existing designs?

A: Yes. Both devices are electrically and mechanically identical. The SN75477DR operates within the same voltage range (4.5V ~ 5.5V), delivers identical output current (300mA), and uses the same 8-SOIC package. No circuit modifications are required.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel is a continuous reel format for high-volume automated assembly. Cut Tape & Digi-Reel® provides smaller quantities in tape format or on Digi-Reel® spools. Both formats contain identical components; the difference is in procurement and handling logistics.

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

A: No. Both the SN75477DRE4 and SN75477DR are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Compliance certifications are identical.

Q: Why is the SN75477DRE4 discontinued?

A: Product discontinuation decisions are made by manufacturers based on market demand and product lifecycle management. The SN75477DR remains in active production, providing continuity for applications requiring this peripheral driver functionality.

Q: What is the operating temperature range for both devices?

A: Both the SN75477DRE4 and SN75477DR operate across 0°C to 70°C (TA), making them suitable for standard industrial and commercial temperature environments.