SN74HC623DWR Equivalent & Substitute Parts

Part Overview

The SN74HC623DWR is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data transmission with 3-state output capability. Operating across a 2V to 6V supply range, this component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure seamless integration into existing or new applications.

Substiute Parts

SN74HC623DWR

Texas InstrumentsIn Stock: 841SN74HC623DWR Datasheet

Current PartRFQ

SN74HC245DWR

Texas InstrumentsIn Stock: 131463SN74HC245DWR Datasheet

Parametric EquivalentRFQ

SN74HC645DWR

Texas InstrumentsIn Stock: 3210SN74HC645DWR Datasheet

Parametric EquivalentRFQ

SN74HC623DW

Texas InstrumentsIn Stock: 2270SN74HC623DW Datasheet

DirectRFQ

MM74HC245AWMX

onsemiIn Stock: 1882MM74HC245AWMX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC623DWR are qualified based on strict parametric equivalence across the following criteria:

Critical Matching Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 7.8mA, 7.8mA
• Voltage - Supply: 2V ~ 6V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

All identified substitutes maintain these electrical and mechanical specifications. Differences in product status (Active vs. Obsolete), packaging format (Cut Tape, Tube, Tape & Reel), and manufacturer origin are noted but do not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

SN74HC245DWR (Texas Instruments) – Recommended primary substitute. Active product status ensures long-term availability and supply chain continuity. Maintains all electrical and mechanical specifications. Available in Cut Tape and Digi-Reel packaging formats with substantial inventory (131,452 units). MSL rating of 1 provides unlimited moisture tolerance.

SN74HC645DWR (Texas Instruments) – Secondary substitute. Active product status with confirmed availability (3,200 units). Identical electrical and mechanical parameters. Suitable for applications requiring Texas Instruments sourcing preference.

SN74HC623DW (Texas Instruments) – Direct variant of the main part number. Same base product (74HC623) with identical electrical specifications. Available in Tube packaging (2,200 units). Active product status. Recommended for applications where packaging format compatibility is confirmed.

MM74HC245AWMX (onsemi) – Parametric equivalent from alternative manufacturer. Active product status with lower inventory (1,778 units). MSL rating of 3 (168 Hours) requires controlled storage conditions compared to MSL 1 alternatives. Suitable for applications where multi-source qualification is required.

Frequently Asked Questions (FAQ)

Q: Can SN74HC245DWR directly replace SN74HC623DWR? A: Yes. Both parts share identical electrical specifications (voltage supply, output current, operating temperature range) and mechanical compatibility (20-SOIC package, surface mount). The primary difference is product status: SN74HC623DWR is obsolete while SN74HC245DWR is active, making the latter the preferred choice for new designs and ongoing support.

Q: What is the significance of MSL rating differences between substitutes? A: MSL (Moisture Sensitivity Level) indicates storage and handling requirements. SN74HC623DWR, SN74HC245DWR, SN74HC645DWR, and SN74HC623DW all carry MSL 1 (Unlimited), requiring no special moisture control. MM74HC245AWMX carries MSL 3 (168 Hours), requiring dry storage and bake-out procedures if exposed to moisture. Select based on your manufacturing environment and storage capabilities.

Q: Are there packaging format differences among substitutes? A: Yes. SN74HC623DWR original packaging is not specified. SN74HC245DWR is available in Cut Tape and Digi-Reel formats. SN74HC645DWR packaging is not specified. SN74HC623DW is supplied in Tube format. MM74HC245AWMX is supplied in Tape & Reel format. All maintain the same 20-SOIC physical package. Verify packaging compatibility with your assembly process before selection.

Q: Why is SN74HC623DWR marked as obsolete? A: Obsolete status indicates Texas Instruments has discontinued active production and support. Substitute parts with Active status (SN74HC245DWR, SN74HC645DWR, SN74HC623DW, MM74HC245AWMX) provide equivalent functionality with assured long-term availability and manufacturing support.

Q: Can I use MM74HC245AWMX from onsemi as a substitute? A: Yes, for applications where multi-source qualification is acceptable. MM74HC245AWMX maintains all critical electrical and mechanical specifications. The MSL 3 rating requires appropriate moisture control during storage and handling. Verify onsemi sourcing is acceptable within your supply chain and quality requirements.

Q: What parameters must remain identical for substitution? A: Logic type (Transceiver, Non-Inverting), bit configuration (1 Element, 8 Bits per Element), output type (3-State), output current (7.8mA high and low), supply voltage range (2V ~ 6V), operating temperature range (-40°C ~ 85°C), package type (20-SOIC), and mounting method (Surface Mount) must all match. Deviations in these parameters indicate incompatibility.