74ACT245SC_NL Equivalent & Substitute Parts

Part Overview

The 74ACT245SC_NL is a non-inverting transceiver logic IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Key Parameters

Parameter	Value
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the 74ACT245SC_NL is determined by strict equivalence across the following critical parameters: logic type (non-inverting transceiver), element count (1), bit width (8 bits), output configuration (3-state), output current capability (24mA high and low), supply voltage range (4.5V to 5.5V), and package type (20-SOIC with 0.295" width).

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents: Parts with identical part numbers from the same or different manufacturers, differing only in packaging format (tube vs. cut tape).

Similar Manufacturer Parts: Parts meeting all electrical and functional parameters but with variations in operating temperature range or package width that do not affect core substitution eligibility.

Parametric Equivalents: Parts with identical electrical specifications and package dimensions, available in different packaging configurations.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current (mA)	Supply Voltage	Operating Temp	Package	Product Status
74ACT245SC_NL	onsemi	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Obsolete
74ACT245SC	onsemi	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Active
MC74ACT245DWR2G	onsemi	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Active
MC74ACT245DWG	onsemi	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Active
SN74ACT245DWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Active
CD74ACT245M96	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-55°C ~ 125°C	20-SOIC (0.295")	Active
SN74ACT245NSR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO (0.209")	Active
SN74ACT245DW	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC (0.295")	Discontinued at DiGi Electronics

Engineering Selection Recommendations

For direct replacement of the obsolete 74ACT245SC_NL, the 74ACT245SC from onsemi provides identical electrical specifications and package dimensions with active product status and ROHS3 compliance. This part is the primary equivalent choice.

Texas Instruments SN74ACT245DWR offers full parametric equivalence with active status and ROHS3 compliance. This part is suitable for new designs and ongoing production requiring 74ACT245 functionality.

The MC74ACT245DWG from onsemi and SN74ACT245DW from Texas Instruments are parametric equivalents with identical core specifications. Both are ROHS3 compliant and suitable for substitution in applications matching the specified operating temperature range.

CD74ACT245M96 from Texas Instruments extends the operating temperature range to -55°C to 125°C, making it suitable for applications requiring enhanced temperature performance while maintaining all other electrical parameters.

SN74ACT245NSR from Texas Instruments uses a narrower 20-SO package (0.209" width) instead of the standard 20-SOIC (0.295" width). This part is electrically equivalent but requires PCB layout verification for package footprint compatibility.

SN74ACT245DW from Texas Instruments is discontinued at DiGi Electronics but remains parametrically equivalent. Availability should be confirmed before selection for new production.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for 74ACT245SC_NL?

A: Yes, all listed parts meet the core electrical and functional specifications. However, verify package footprint compatibility. Most parts use the standard 20-SOIC (0.295" width) package, except SN74ACT245NSR which uses 20-SO (0.209" width).

Q: What is the difference between 74ACT245SC and 74ACT245SC_NL?

A: Both parts are electrically identical non-inverting transceivers. The difference lies in packaging format and product status. 74ACT245SC is currently active, while 74ACT245SC_NL is obsolete.

Q: Are onsemi and Texas Instruments parts interchangeable?

A: Yes. Both manufacturers produce 74ACT245 series transceivers with identical electrical specifications, supply voltage, output current, and operating temperature ranges. All listed parts are functionally interchangeable within the specified parameters.

Q: Does CD74ACT245M96 work in applications designed for -40°C to 85°C operation?

A: Yes. CD74ACT245M96 operates across -55°C to 125°C, which encompasses the -40°C to 85°C range. It is suitable for any application requiring the standard temperature range and offers extended performance for wider temperature environments.

Q: What is the significance of the package width difference in SN74ACT245NSR?

A: SN74ACT245NSR uses a 20-SO package (0.209" width) compared to the standard 20-SOIC (0.295" width). The electrical specifications are identical, but the physical footprint differs. PCB layout and component placement must be verified before substitution.

Q: Which substitute part has the best availability?

A: CD74ACT245M96 from Texas Instruments shows the highest inventory at 15,148 pieces. SN74ACT245DWR also has strong availability at 4,840 pieces. Inventory levels should be confirmed with your supplier for current availability.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. SN74ACT245DW, though discontinued at DiGi Electronics, is also ROHS3 compliant. The original 74ACT245SC_NL does not specify RoHS status.

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