SN75477DG4 Equivalent & Substitute Parts

Part Overview

The SN75477DG4 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, housed in an 8-SOIC surface mount package.

The SN75477DG4 is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

SN75477DG4

Texas InstrumentsIn Stock: 664SN75477DG4 Datasheet

Current PartRFQ

SN75477D

Texas InstrumentsIn Stock: 1773SN75477D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN75477DG4 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Logic Type: Peripheral Driver
• Number of Elements: 2
• Number of Bits per Element: 1
• Output Current Capability: 300mA minimum
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: 0°C ~ 70°C (TA)
• Package Type: 8-SOIC
• RoHS Compliance: ROHS3 Compliant

Parts meeting all these parameters are considered direct functional equivalents and may be substituted without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The SN75477D is a direct functional equivalent to the SN75477DG4. Both parts share identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the SN75477DG4 is discontinued, while the SN75477D remains in active production.

For new designs and component replenishment, the SN75477D is the recommended selection. This part maintains full compatibility with existing circuit designs utilizing the SN75477DG4 and offers superior long-term availability. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings, ensuring equivalent reliability in storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the SN75477D directly replace the SN75477DG4 in existing designs?

A: Yes. The SN75477D is a direct substitute. Both parts are manufactured by Texas Instruments and share identical electrical parameters, output current ratings, supply voltage range, operating temperature specifications, and 8-SOIC package configuration. No circuit modifications are required.

Q: What is the difference between SN75477DG4 and SN75477D?

A: The primary difference is packaging and product status. The SN75477DG4 is discontinued, while the SN75477D is actively produced. The SN75477D is supplied in tube packaging, whereas the SN75477DG4 was supplied in alternative packaging. All electrical and functional specifications are identical.

Q: Are there any compliance or certification differences?

A: No. Both the SN75477DG4 and SN75477D are ROHS3 compliant, carry identical moisture sensitivity levels (MSL 1 - Unlimited), and share the same REACH and ECCN classifications. They are equivalent from a regulatory and compliance standpoint.

Q: What is the 8-SOIC package specification?

A: The 8-SOIC package is a surface mount integrated circuit package with 8 pins, measuring 0.154 inches (3.90mm) in width. This package type is standard for both the SN75477DG4 and SN75477D, ensuring mechanical and electrical compatibility on PCBs designed for either part.

Q: Is the SN75477D available in higher quantities?

A: Yes. Current inventory for the SN75477D is 1744 pieces in new original condition, compared to 625 pieces for the discontinued SN75477DG4. The SN75477D offers superior availability for production requirements.