LPV321IDCKRE4 Equivalent & Substitute Parts

Part Overview

The LPV321IDCKRE4 is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a 5-TSSOP SC-70-5 package. This device is classified as obsolete, indicating discontinued production and limited availability. The LPV321IDCKRE4 features rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. Due to its obsolete status, equivalent substitute parts with active product status are necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility through matching electrical specifications and package configurations while offering improved availability and extended product lifecycle support.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	0.1	V/µs
Gain Bandwidth Product	237	kHz
Current - Input Bias	2	nA
Voltage - Input Offset	1.5	mV
Current - Supply	9	µA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5	V
Operating Temperature Range	-40 to 125	°C
Package / Case	5-TSSOP, SC-70-5, SOT-353	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LPV321IDCKRE4 are grouped based on electrical parameter compatibility and package configuration. The substitution logic is determined by the following criteria:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Voltage Supply Span: Minimum 2.7 V, Maximum ≥ 5 V
Mounting Type: Surface Mount
RoHS3 Compliance

Package-Based Grouping:

Group 1 - SC-70-5 Package (Direct Package Match): LMV321M7/NOPB, LMV321M7X/NOPB, LPV321M7/NOPB, LPV321M7X/NOPB. These parts maintain identical package configuration to the main part, enabling direct footprint compatibility.

Group 2 - SOT-23-5 Package (Alternative Package): LMV321M5/NOPB, LMV321M5X/NOPB, LPV321M5/NOPB, LPV321M5X/NOPB. These parts provide functional equivalence with different package geometry, requiring PCB layout modification.

Electrical Performance Tiers:

Tier A - Enhanced Performance (LMV321 Series): Slew Rate 1 V/µs, Gain Bandwidth Product 1 MHz, Current Supply 130 µA. These parts exceed the original specifications and are suitable for applications requiring higher bandwidth and faster response.

Tier B - Matched Performance (LPV321 Series): Slew Rate 0.1 V/µs, Gain Bandwidth Product 152-237 kHz, Current Supply 9 µA. These parts maintain electrical characteristics comparable to the original part, suitable for direct replacement in existing designs.

Parameter Comparison

Parameter	LPV321IDCKRE4	LMV321M7/NOPB	LMV321M7X/NOPB	LPV321M7/NOPB	LPV321M7X/NOPB	LMV321M5/NOPB	LMV321M5X/NOPB	LPV321M5/NOPB	LPV321M5X/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor	National Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.1	1	1	0.1	0.1	1	1	0.1	0.1
Gain Bandwidth Product (kHz)	237	1000	1000	152	152	1000	1000	152	152
Current - Input Bias (nA)	2	15	15	2	2	15	15	2	2
Voltage - Input Offset (mV)	1.5	1.7	1.7	1.5	1.5	1.7	1.7	1.5	1.5
Current - Supply (µA)	9	130	130	9	9	130	130	9	9
Voltage - Supply Span Min (V)	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7
Voltage - Supply Span Max (V)	5	5.5	5.5	5	5	5.5	5.5	5	5
Operating Temperature (°C)	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package / Case	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Specified	Not Specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Specified
Inventory Status	1045 Pcs	25100 Pcs	35200 Pcs	18251 Pcs	10200 Pcs	7100 Pcs	65100 Pcs	1605 Pcs	10100 Pcs

Engineering Selection Recommendations

For Direct Package Replacement (SC-70-5):

Select LMV321M7/NOPB or LMV321M7X/NOPB when PCB layout cannot be modified and identical footprint is required. These parts are manufactured by Texas Instruments with active product status and ROHS3 compliance. The LMV321M7X/NOPB variant offers higher inventory availability (35200 units) compared to LMV321M7/NOPB (25100 units). Both parts feature enhanced electrical performance with 1 V/µs slew rate and 1 MHz gain bandwidth product, exceeding original specifications. Operating temperature range is -40°C to 85°C, which is narrower than the original part's -40°C to 125°C range.

Select LPV321M7/NOPB or LPV321M7X/NOPB when matched electrical performance to the original part is required. These parts maintain 0.1 V/µs slew rate and 152 kHz gain bandwidth product. LPV321M7X/NOPB provides higher inventory (10200 units) than LPV321M7/NOPB (18251 units). Compliance documentation is not specified for National Semiconductor variants.

For Alternative Package Replacement (SOT-23-5):

Select LMV321M5/NOPB or LMV321M5X/NOPB when PCB layout modification is acceptable and enhanced performance is beneficial. LMV321M5X/NOPB offers the highest inventory availability (65100 units) among all substitutes. Both variants are manufactured by Texas Instruments with ROHS3 compliance and active product status. Electrical performance matches the SC-70-5 variants with 1 V/µs slew rate and 1 MHz gain bandwidth product.

Select LPV321M5/NOPB or LPV321M5X/NOPB when matched electrical performance with alternative packaging is required. LPV321M5/NOPB is manufactured by Texas Instruments (1605 units inventory), while LPV321M5X/NOPB is sourced from National Semiconductor (10100 units inventory). Both maintain 0.1 V/µs slew rate and 152 kHz gain bandwidth product.

Compliance and Regulatory Considerations:

All Texas Instruments variants (LMV321M7/NOPB, LMV321M7X/NOPB, LMV321M5/NOPB, LMV321M5X/NOPB, LPV321M5/NOPB) carry ROHS3 compliance certification and Moisture Sensitivity Level 1 (Unlimited). National Semiconductor variants (LPV321M7/NOPB, LPV321M7X/NOPB, LPV321M5X/NOPB) do not specify compliance documentation in the provided data. All parts are classified as EAR99 for export control purposes and share identical HTSUS code 8542.33.0001.

Temperature Range Consideration:

The original LPV321IDCKRE4 operates from -40°C to 125°C. All substitute parts operate from -40°C to 85°C. Applications requiring operation above 85°C cannot use these substitutes without design modification or thermal management review.

Frequently Asked Questions (FAQ)

Q1: Can LMV321M7/NOPB directly replace LPV321IDCKRE4 without PCB modification?

A: Yes. Both parts use the 5-TSSOP SC-70-5 package with identical pinout and footprint. However, LMV321M7/NOPB features higher slew rate (1 V/µs vs. 0.1 V/µs) and gain bandwidth product (1 MHz vs. 237 kHz), which may affect circuit behavior in applications with tight bandwidth constraints or noise-sensitive designs.

Q2: What is the difference between LMV321M5X/NOPB and LMV321M5/NOPB?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: LMV321M5X/NOPB is supplied in Cut Tape & Digi-Reel format with 65100 units inventory, while LMV321M5/NOPB is supplied in Cut Tape & Digi-Reel format with 7100 units inventory. Selection depends on procurement volume and supply chain requirements.

Q3: Why do substitute parts have lower maximum operating temperature (-40°C to 85°C vs. -40°C to 125°C)?

A: The substitute parts are designed for standard industrial temperature range applications. Applications requiring operation above 85°C must retain the original LPV321IDCKRE4 or identify alternative components with extended temperature specifications. This is a fundamental design difference between the part families.

Q4: Are National Semiconductor variants (LPV321M7/NOPB, LPV321M7X/NOPB, LPV321M5X/NOPB) equivalent to Texas Instruments variants?

A: National Semiconductor variants maintain identical electrical specifications and package configurations. However, ROHS3 compliance and Moisture Sensitivity Level certifications are not specified in the provided data. Texas Instruments variants carry explicit ROHS3 compliance certification. For applications requiring documented compliance, Texas Instruments variants are recommended.

Q5: Which substitute part offers the best inventory availability?

A: LMV321M5X/NOPB offers the highest inventory availability with 65100 units in stock. This variant combines SC-74A SOT-23-5 package, enhanced electrical performance (1 V/µs slew rate, 1 MHz gain bandwidth), Texas Instruments manufacturing, and ROHS3 compliance.

Q6: Can I use LMV321 series parts in place of LPV321 series parts?

A: LMV321 parts feature higher performance specifications (1 V/µs slew rate, 1 MHz gain bandwidth, 130 µA supply current) compared to LPV321 parts (0.1 V/µs slew rate, 152 kHz gain bandwidth, 9 µA supply current). LMV321 substitution is suitable for applications where higher bandwidth and faster response are beneficial or neutral. Applications optimized for low power consumption or narrow bandwidth may experience performance changes.

Q7: What packaging options are available for substitution?

A: Two package options are available. SC-70-5 (5-TSSOP, SOT-353) maintains identical footprint to the original part. SOT-23-5 (SC-74A, SOT-753) requires PCB layout modification but offers alternative sourcing options. Package selection depends on PCB design flexibility and supply chain strategy.

Q8: Are all substitute parts RoHS compliant?

A: Texas Instruments variants (LMV321M7/NOPB, LMV321M7X/NOPB, LMV321M5/NOPB, LMV321M5X/NOPB, LPV321M5/NOPB) carry explicit ROHS3 compliance certification. National Semiconductor variants do not specify compliance status in the provided data. For applications requiring documented RoHS compliance, Texas Instruments variants are recommended.

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