SN74AC245DW Equivalent & Substitute Parts

Part Overview

The SN74AC245DW is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit bidirectional data transfer with 3-state output capability. The device operates across a 2V to 6V supply voltage range and is housed in a 20-SOIC surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and production requirements. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.

Substiute Parts

SN74AC245DW

Texas InstrumentsIn Stock: 2384SN74AC245DW Datasheet

Current PartRFQ

SN74AC245DWR

Texas InstrumentsIn Stock: 3285SN74AC245DWR Datasheet

DirectRFQ

74AC245SCX

onsemiIn Stock: 328274AC245SCX Datasheet

DirectRFQ

MC74AC245DWR2G

onsemiIn Stock: 4763MC74AC245DWR2G Datasheet

DirectRFQ

MC74AC245DWG

onsemiIn Stock: 2190MC74AC245DWG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AC245DW is determined by strict equivalence across the following critical parameters: logic type (non-inverting transceiver), element and bit configuration (1 element, 8 bits per element), output type (3-state), output current specifications (24mA high and low), supply voltage range (2V ~ 6V), operating temperature range (-40°C ~ 85°C), and package format (20-SOIC surface mount). All substitute parts listed maintain these specifications without deviation. Packaging format variations (Cut Tape, Digi-Reel, or Tube) do not affect electrical compatibility and represent only distribution and handling differences. Moisture sensitivity level differences (MSL 1 versus MSL 3) reflect manufacturing process variations but do not impact functional equivalence for standard operating conditions.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the discontinued SN74AC245DW, the SN74AC245DWR from Texas Instruments is the primary equivalent, maintaining identical MSL rating and active product status. This part is available in Cut Tape and Digi-Reel packaging formats with 3200 units in stock.

When Texas Instruments sourcing is constrained, onsemi alternatives provide full electrical and mechanical compatibility. The 74AC245SCX and MC74AC245DWR2G are available in Cut Tape and Digi-Reel formats with 3260 and 4686 units respectively. The MC74AC245DWG offers Tube packaging with 2154 units in stock. All onsemi variants carry MSL 3 rating (168 hours), which is acceptable for standard assembly and storage conditions.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification. Selection between available options should prioritize inventory availability, packaging format requirements for production processes, and established supplier relationships.

Frequently Asked Questions (FAQ)

Q: Can SN74AC245DWR directly replace SN74AC245DW? A: Yes. Both parts are electrically and mechanically identical. The primary difference is packaging format (Cut Tape/Digi-Reel versus Tube) and active versus discontinued product status. SN74AC245DWR is the recommended direct replacement.

Q: What is the difference between MSL 1 and MSL 3 ratings? A: MSL 1 allows unlimited shelf life without moisture baking. MSL 3 requires moisture baking after 168 hours of exposure to ambient conditions. For standard manufacturing environments with proper storage, MSL 3 parts are functionally equivalent to MSL 1 parts.

Q: Are onsemi parts (74AC245SCX, MC74AC245DWR2G, MC74AC245DWG) compatible with designs using SN74AC245DW? A: Yes. All onsemi variants maintain identical electrical specifications, output current ratings, supply voltage range, operating temperature range, and 20-SOIC package dimensions. They are parametric equivalents suitable for direct substitution.

Q: Does packaging format (Cut Tape, Digi-Reel, Tube) affect electrical performance? A: No. Packaging format is a distribution and handling specification only. Electrical and mechanical performance is identical across all packaging options.

Q: Which substitute part offers the best availability? A: MC74AC245DWR2G from onsemi currently has the highest inventory at 4686 units in stock, followed by 74AC245SCX with 3260 units.