74F245SJ Equivalent & Substitute Parts

Part Overview

The 74F245SJ is a non-inverting transceiver logic integrated circuit 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-SOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	74F245SJ
Manufacturer	onsemi
Series	74F
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High	3mA, 24mA
Current - Output Low	15mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74F245SJ is determined by strict alignment of the following critical parameters:

Logic Type: Transceiver, Non-Inverting (1 Element, 8 Bit per Element)
Output Configuration: 3-State output
Electrical Specifications: Current output ratings (3mA/24mA high, 15mA/64mA low) and supply voltage range (4.5V ~ 5.5V)
Operating Temperature Range: 0°C ~ 70°C (TA)
Base Product Number: 74F245
Mounting Type: Surface Mount

All identified substitute parts maintain identical functional and electrical characteristics. Variations exist only in packaging format (SOP vs. SOIC width specifications) and product status classifications. These packaging differences do not affect electrical performance or pin functionality.

Parameter Comparison

Parameter	74F245SJ (onsemi)	SN74F245NSR (TI)	SN74F245DW (TI)	SN74F245DWR (TI)
Series	74F	74F	74F	74F
Logic Type	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	3mA, 24mA; 15mA, 64mA	3mA, 24mA; 15mA, 64mA	3mA, 24mA; 15mA, 64mA	3mA, 24mA; 15mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Last Time Buy	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74F245NSR (Texas Instruments) is the primary recommended substitute. This part maintains active product status with ROHS3 compliance certification. The 20-SO package format (0.209", 5.30mm width) provides direct dimensional compatibility with the original 74F245SJ 20-SOP package. Tape & Reel packaging supports automated assembly processes.

SN74F245DWR (Texas Instruments) serves as a secondary alternative with active product status and ROHS3 compliance. This variant uses a 20-SOIC package (0.295", 7.50mm width) with Tape & Reel packaging. The wider package footprint requires PCB layout verification before implementation.

SN74F245DW (Texas Instruments) is available with Last Time Buy status and ROHS3 compliance. Tube packaging format is suitable for manual assembly or lower-volume applications. The 20-SOIC package (0.295", 7.50mm width) requires the same PCB layout considerations as SN74F245DWR.

All three substitutes provide equivalent electrical performance and functional compatibility with the obsolete 74F245SJ. Selection should prioritize product status availability and packaging format alignment with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SN74F245NSR directly replace 74F245SJ without PCB modifications?

A: Yes. The SN74F245NSR maintains identical pin configuration, electrical specifications, and package dimensions (20-SO, 0.209" width) as the original 74F245SJ. No PCB layout changes are required.

Q: What is the difference between SN74F245DW and SN74F245DWR?

A: Both parts are functionally identical with matching electrical specifications. The primary difference is packaging format: SN74F245DW is supplied in Tube format, while SN74F245DWR is supplied in Tape & Reel format. The Tape & Reel variant supports automated pick-and-place assembly.

Q: Do the wider SOIC packages (SN74F245DW, SN74F245DWR) require PCB redesign?

A: The 20-SOIC packages (0.295", 7.50mm width) have different footprints than the original 20-SOP (0.209", 5.30mm width). PCB layout verification is necessary to confirm pad spacing and trace routing compatibility before implementation.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three Texas Instruments substitutes (SN74F245NSR, SN74F245DW, SN74F245DWR) carry ROHS3 compliance certification. The original 74F245SJ RoHS status was not specified in available documentation.

Q: What is the inventory status for these substitutes?

A: SN74F245NSR has 2000 units in stock. SN74F245DW has 2184 units in stock. SN74F245DWR has 2540 units in stock. All parts are classified as new original stock.

Q: Are there any electrical performance differences between the substitute parts?

A: No. All substitute parts maintain identical electrical specifications including supply voltage (4.5V ~ 5.5V), output current ratings (3mA/24mA high, 15mA/64mA low), and operating temperature range (0°C ~ 70°C).

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