SN74AC245PW Equivalent & Substitute Parts

Part Overview

The SN74AC245PW is a non-inverting transceiver logic IC manufactured by Texas Instruments, housed in a 20-TSSOP surface mount package. This component functions as a 1-element, 8-bit per element transceiver with 3-state output capability, operating across a 2V to 6V supply voltage range. The SN74AC245PW is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
Part Number	SN74AC245PW
Manufacturer	Texas Instruments
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Bits per Element	8
Output Type	3-State
Current Output (High/Low)	24mA / 24mA
Supply Voltage Range	2V ~ 6V
Operating Temperature	-40°C ~ 85°C (TA)
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74AC245PW is determined by strict equivalence across the following parameters: logic type (non-inverting transceiver), element count (1), bit width (8 bits per element), output configuration (3-state), current drive capability (24mA high and low), supply voltage range (2V to 6V), operating temperature range (-40°C to 85°C), and package specification (20-TSSOP surface mount). All identified substitute parts maintain identical electrical and mechanical specifications across these criteria, ensuring functional interchangeability within the 74AC245 series.

Substitute parts are categorized as follows:

Direct Manufacturer Substitutes: Parts with identical electrical specifications and packaging from the original or alternative manufacturers, differing only in packaging format (tape & reel, cut tape, or tube).

Parametric Equivalents: Parts meeting all electrical and mechanical parameters with alternative packaging configurations, maintaining full functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Status
SN74AC245PW	Texas Instruments	Transceiver, Non-Inverting	1	8	3-State	24/24	2V ~ 6V	-40°C ~ 85°C	20-TSSOP Tube	Discontinued
SN74AC245PWR	Texas Instruments	Transceiver, Non-Inverting	1	8	3-State	24/24	2V ~ 6V	-40°C ~ 85°C	20-TSSOP CT/Digi-Reel	Active
74AC245MTCX	onsemi	Transceiver, Non-Inverting	1	8	3-State	24/24	2V ~ 6V	-40°C ~ 85°C	20-TSSOP CT/Digi-Reel	Active
MC74AC245DTR2G	onsemi	Transceiver, Non-Inverting	1	8	3-State	24/24	2V ~ 6V	-40°C ~ 85°C	20-TSSOP Tape & Reel	Active
74AC245MTC	onsemi	Transceiver, Non-Inverting	1	8	3-State	24/24	2V ~ 6V	-40°C ~ 85°C	20-TSSOP Tube	Active
MC74AC245DTG	onsemi	Transceiver, Non-Inverting	1	8	3-State	24/24	2V ~ 6V	-40°C ~ 85°C	20-TSSOP Tube	Active

Engineering Selection Recommendations

Primary Recommendation: SN74AC245PWR (Texas Instruments) is the direct successor to the discontinued SN74AC245PW, maintaining identical electrical specifications and 20-TSSOP packaging. This part is currently in active production status with established supply availability.

Alternative Selections: onsemi-manufactured parts (74AC245MTCX, MC74AC245DTR2G, 74AC245MTC, MC74AC245DTG) provide full parametric equivalence and are suitable for applications where manufacturer diversification is acceptable. All substitute parts maintain ROHS3 compliance, unlimited MSL rating, and identical electrical performance characteristics.

Packaging Considerations: Selection between tube, cut tape, or tape & reel packaging depends on production volume and assembly requirements. Electrical and functional performance remains constant across all packaging formats.

Frequently Asked Questions (FAQ)

Q: Can SN74AC245PWR be used as a direct replacement for SN74AC245PW?

A: Yes. SN74AC245PWR is electrically and functionally identical to SN74AC245PW. Both are Texas Instruments products with matching logic type, bit width, output configuration, current drive, supply voltage range, and operating temperature specifications. The difference is packaging format: SN74AC245PWR is supplied in cut tape and Digi-Reel format, while SN74AC245PW was supplied in tube packaging.

Q: Are onsemi parts (74AC245MTCX, MC74AC245DTR2G, 74AC245MTC, MC74AC245DTG) compatible with the original SN74AC245PW?

A: Yes. All onsemi-manufactured parts listed meet identical electrical and mechanical specifications: 1-element, 8-bit non-inverting transceiver with 3-state output, 24mA drive current, 2V to 6V supply range, -40°C to 85°C operating temperature, and 20-TSSOP packaging. Functional interchangeability is complete.

Q: What is the difference between 74AC245MTCX and MC74AC245DTG?

A: Both parts are onsemi-manufactured with identical electrical specifications. The primary difference is packaging: 74AC245MTCX is supplied in cut tape and Digi-Reel format, while MC74AC245DTG is supplied in tube packaging. Selection depends on production volume and assembly line requirements.

Q: Does packaging format affect electrical performance?

A: No. Tube, cut tape, and tape & reel packaging formats contain identical die and electrical specifications. Packaging selection is determined by production volume, assembly automation compatibility, and inventory management requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the original SN74AC245PW specification.

Q: What is the MSL rating for these parts?

A: All parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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