SN74LVTH646IPWREP Equivalent & Substitute Parts

Part Overview

The SN74LVTH646IPWREP is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. Operating within a 2.7V to 3.6V supply voltage range, this component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain identical electrical and mechanical specifications while offering improved product status and availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74LVTH646IPWREP
Manufacturer	Texas Instruments
Series	74LVTH
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	24-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVTH646IPWREP is determined by strict parametric equivalence across the following critical specifications:

Mandatory Matching Parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 32mA, 64mA
Voltage - Supply: 2.7V ~ 3.6V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 24-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All identified substitute parts meet these exact specifications. Packaging format variations (Tape & Reel, Cut Tape & Digi-Reel) do not affect electrical or mechanical compatibility and represent alternative distribution methods for the same component.

Parameter Comparison

Parameter	SN74LVTH646IPWREP	SN74LVTH2952PWR	SN74LVTH543IPWREP	SN74LVTH543PWR	SN74LVTH646PWR	SN74LVTH652PWR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Series	74LVTH	74LVTH	74LVTH	74LVTH	74LVTH	74LVTH
Logic Type	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
Number of Bits per Element	8	8	8	8	8	8
Output Type	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain full parametric equivalence to the SN74LVTH646IPWREP across electrical, mechanical, and environmental specifications. The primary distinction is product status: the original part is classified as obsolete, while all substitutes are active components with current manufacturing support.

For new designs and production continuity, selection among substitute parts should prioritize active status components. SN74LVTH646PWR, SN74LVTH543PWR, SN74LVTH2952PWR, and SN74LVTH652PWR all carry active product status and ROHS3 compliance certification. Packaging format selection (Tape & Reel versus Cut Tape & Digi-Reel) depends on procurement volume and assembly process requirements and does not affect functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN74LVTH646IPWREP be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts meet identical electrical and mechanical specifications, including logic type, bit configuration, output characteristics, supply voltage range, operating temperature, package dimensions, and compliance certifications. Direct pin-for-pin substitution is supported.

Q: What is the difference between packaging formats listed for substitute parts?

A: Packaging format variations (Tape & Reel, Cut Tape & Digi-Reel) represent different distribution and handling methods for the same component. Electrical and mechanical specifications remain identical. Selection depends on procurement volume and assembly line compatibility.

Q: Why is the original SN74LVTH646IPWREP classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. Active substitute parts provide equivalent functionality with ongoing manufacturing availability and technical support.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts carry ROHS3 compliance certification and REACH unaffected status, matching the environmental compliance profile of the original component.

Q: What are the critical parameters that determine substitution eligibility?

A: Substitution is determined by matching logic type (Transceiver, Non-Inverting), element count (1), bit configuration (8 bits per element), output type (3-State), output current specifications (32mA high, 64mA low), supply voltage range (2.7V ~ 3.6V), operating temperature range (-40°C ~ 85°C), package type (24-TSSOP), and compliance certifications (ROHS3, REACH unaffected, MSL 1).

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