IDT74LVC245ASOG8 Equivalent & Substitute Parts

Part Overview

The IDT74LVC245ASOG8 is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates across a supply voltage range of 2.7V to 3.6V and is housed in a 20-SOIC 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	IDT74LVC245ASOG8
Manufacturer	Renesas Electronics Corporation
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	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the IDT74LVC245ASOG8 is determined by the following critical parameters:

Logic Function: All substitutes must be non-inverting transceivers with 1 element and 8 bits per element
Output Configuration: 3-state output capability is mandatory
Package Compatibility: 20-SOIC package with 0.295" (7.50mm) width maintains mechanical and electrical compatibility
Supply Voltage Range: Substitutes must support the 2.7V to 3.6V operating range of the original part
Output Current: 24mA output drive capability (high and low) is the baseline requirement
Operating Temperature: Minimum -40°C to 85°C range required; extended ranges are acceptable

Substitute parts are grouped into three categories based on these parameters:

Direct Functional Equivalents (74LVC series from Nexperia and Texas Instruments): Maintain identical logic specifications with active product status and enhanced temperature ranges
Extended Voltage Range Alternatives (74LCX series from onsemi): Support broader supply voltage (2V ~ 5.5V) with extended temperature operation
Enhanced Performance Variants (74LVCH series): Improved specifications while maintaining core transceiver functionality

Parameter Comparison

Parameter	IDT74LVC245ASOG8	74LVC245AD,118	74LVC2245AD,118	74LVCH245AD,118	MC74LCX245DWG	SN74LVC245ADW	SN74LVC245ADWR	SN74LVC245ANS	SN74LVC245ANSR	SN74LVCH245ADW
Manufacturer	Renesas	Nexperia	Nexperia	Nexperia	onsemi	TI	TI	TI	TI	TI
Logic Type	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting
Number of Elements	1	1	1	1	1	1	1	1	1	1
Number of Bits per Element	8	8	8	8	8	8	8	8	8	8
Output Type	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	12mA, 12mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	2.7V ~ 3.6V	1.2V ~ 3.6V	1.2V ~ 3.6V	1.2V ~ 3.6V	2V ~ 5.5V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)	20-SOIC (0.209", 5.30mm)	20-SOIC (0.295", 7.50mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

The SN74LVC245ADWR (Texas Instruments, Cut Tape packaging) and SN74LVC245ANSR (Texas Instruments, Tape & Reel packaging) are the preferred substitutes. Both maintain identical output current specifications (24mA), support the required 2.7V to 3.6V supply range through their 1.65V to 3.6V capability, and are classified as active products with ROHS3 compliance. These parts are available in high inventory quantities (100,200 and 17,400 units respectively) and provide extended operating temperature ranges (-40°C to 125°C) compared to the original part.

Alternative Substitutes (Extended Capability)

The 74LVC245AD,118 (Nexperia, Cut Tape packaging) offers identical output current and package dimensions with active product status and ROHS3 compliance. This part supports the full 2.7V to 3.6V range through its 1.2V to 3.6V specification and provides 58,382 units in inventory.

The MC74LCX245DWG (onsemi) extends the supply voltage range to 2V to 5.5V and operating temperature to -55°C to 125°C, suitable for applications requiring broader environmental tolerance. However, this part carries MSL-3 classification (168 hours) compared to MSL-1 for other substitutes.

Compatibility Considerations

The SN74LVC245ANS and SN74LVC245ANSR (Texas Instruments) feature a narrower package width (0.209" vs. 0.295"), which may require PCB layout verification before implementation. The 74LVC2245AD,118 (Nexperia) provides reduced output current (12mA vs. 24mA), limiting its use to applications with lower drive requirements.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitutes as a direct replacement for the IDT74LVC245ASOG8?

A: Yes, with package verification. The SN74LVC245ADWR, SN74LVC245ANSR, and 74LVC245AD,118 are functionally equivalent. However, the SN74LVC245ANS and SN74LVC245ANSR use a narrower 20-SOIC package (0.209" width) compared to the original 0.295" width. Confirm PCB footprint compatibility before substitution.

Q: What is the key difference between the 74LVC245AD,118 and 74LVC2245AD,118?

A: The primary difference is output current. The 74LVC245AD,118 provides 24mA output drive (matching the original part), while the 74LVC2245AD,118 provides only 12mA. Select based on your circuit's current requirements.

Q: Why does the MC74LCX245DWG have a different MSL rating?

A: The MC74LCX245DWG carries MSL-3 (168 hours) classification, indicating it requires moisture control during storage and handling. Other substitutes carry MSL-1 (unlimited) classification. This affects shelf life and handling procedures but does not impact electrical performance.

Q: Are all substitutes ROHS3 compliant?

A: Yes, all active substitute parts listed are ROHS3 compliant. The original IDT74LVC245ASOG8 does not specify RoHS status due to its obsolete classification.

Q: Can I use the MC74LCX245DWG in a 3.3V system?

A: Yes. The MC74LCX245DWG supports 2V to 5.5V supply range, which encompasses the 3.3V operating point. However, verify that your system's 3.3V supply falls within this range and that the extended temperature capability (-55°C to 125°C) aligns with your application requirements.

Q: What is the inventory status for these substitutes?

A: All listed substitutes are in active production with substantial inventory: SN74LVC245ADWR (100,200 units), 74LVC245AD,118 (58,382 units), SN74LVC245ANSR (17,400 units), MC74LCX245DWG (2,888 units), and others ranging from 872 to 3,040 units. Availability supports both immediate and long-term procurement needs.

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