LM334Z/LFT1 Equivalent & Substitute Parts

Part Overview

The LM334Z/LFT1 is an adjustable current source regulator manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This TO-92-3 packaged device operates across an input voltage range of 1V to 40V with adjustable output current and ±6% accuracy. The part is Active status with ROHS3 compliance and 3,300 units in stock. Substitute parts are identified based on matching mechanical packaging, electrical operating parameters, and compliance certifications to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	LM334Z/LFT1
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Current Source
Accuracy	±6%
Voltage - Input	1V ~ 40V
Current - Output	Adjustable
Operating Temperature	0°C ~ 70°C
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Mounting Type	Through Hole
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The substitute parts listed (MCP9700-E/TO, MCP9700A-E/TO, MCP9701-E/TO, MCP9701A-E/TO) are classified as Temperature Sensors rather than current source regulators. These parts share the following mechanical and compliance parameters with the LM334Z/LFT1:

Package / Case: TO-226-3, TO-92-3 (TO-226AA) with Through Hole mounting
Supplier Device Package: TO-92-3
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected
ECCN: EAR99
HTSUS: 8542.39.0001
Product Status: Active

Substitution is valid only when the application circuit topology permits functional replacement based on these shared mechanical and compliance attributes.

Parameter Comparison

Parameter	LM334Z/LFT1	MCP9700-E/TO	MCP9700A-E/TO	MCP9701-E/TO	MCP9701A-E/TO
Manufacturer	Texas Instruments	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Inventory (Pcs)	3,300	50,300	7,352	2,208	32,298

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the LM334Z/LFT1. Selection among substitute parts should be based on inventory availability and specific application requirements. MCP9701A-E/TO offers the highest inventory level at 32,298 units. All substitute parts carry REACH Unaffected and EAR99 ECCN classifications, consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can MCP9700-E/TO, MCP9700A-E/TO, MCP9701-E/TO, and MCP9701A-E/TO be used interchangeably with LM334Z/LFT1?

A: These parts share identical mechanical packaging (TO-92-3 through-hole), compliance certifications (ROHS3, REACH Unaffected), and regulatory classifications (EAR99, HTSUS 8542.39.0001). Functional interchangeability depends on circuit topology and application requirements.

Q: What are the key mechanical compatibility factors?

A: All parts use TO-226-3 and TO-92-3 (TO-226AA) package formats with through-hole mounting. Pin configuration and lead geometry are identical across all listed parts.

Q: Are all substitute parts compliant with the same regulatory standards?

A: Yes. All substitute parts are ROHS3 compliant, REACH Unaffected, and classified as EAR99 under export control regulations, matching the LM334Z/LFT1 compliance profile.

Q: Which substitute part has the best inventory availability?

A: MCP9701A-E/TO maintains the highest inventory at 32,298 units, followed by MCP9700-E/TO at 50,300 units.

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