LMH6642MF/NOPB Equivalent & Substitute Parts

Part Overview

The LMH6642MF/NOPB is a voltage feedback operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit, rail-to-rail output amplifier operates across a 2.7 V to 12.8 V supply range with a slew rate of 135 V/µs and -3dB bandwidth of 130 MHz. The device is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical performance parameters and mechanical compatibility are maintained within the allowed operational specifications for this voltage feedback amplifier category.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	135	V/µs
-3dB Bandwidth	130	MHz
Current - Input Bias	1.6	µA
Voltage - Input Offset	1	mV
Current - Supply	2.7	mA
Current - Output / Channel	75	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	12.8	V
Operating Temperature	-40 to 85	°C
Package / Case	SC-74A, SOT-753	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LMH6642MF/NOPB are identified based on the following substitution criteria:

Primary Compatibility Parameters:

Single-circuit operational amplifier architecture
Rail-to-rail output configuration
SOT-23-5 package footprint (SC-74A, SOT-753 or TSOT-23-5 equivalent)
Surface mount technology
Operating temperature range: -40°C to 85°C
Supply voltage overlap within 2.7 V minimum specification
ROHS3 compliance and MSL 1 rating

Functional Performance Parameters:

Voltage feedback amplifier topology (primary group)
Slew rate ≥ 135 V/µs (THS4221 series exceeds this; LT6205 series at 600 V/µs; MAX4214 at 600 V/µs)
-3dB bandwidth ≥ 130 MHz (all substitutes meet or exceed)
Input bias current ≤ 1.6 µA (THS4221 at 900 nA; LT6205 and MAX4214 exceed)
Output current capability ≥ 75 mA (all substitutes meet or exceed)

Substitutes are grouped into two categories: Texas Instruments voltage feedback amplifiers (THS4221 series) and Analog Devices voltage feedback/buffer amplifiers (LT6205 series, MAX4214). The STMicroelectronics TSH80IYLT is included as a general-purpose alternative with reduced bandwidth performance.

Parameter Comparison

Parameter	LMH6642MF/NOPB	THS4221DBVR	THS4221DBVT	LT6205CS5#TRMPBF	LT6205HS5#TRMPBF	LT6205IS5#TRMPBF	LT6205IS5#TRPBF	MAX4214EUK+T	TSH80IYLT
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices/Maxim	STMicroelectronics
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Buffer	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)	135	990	990	600	600	600	600	600	118
-3dB Bandwidth (MHz)	130	230	230	—	—	—	—	230	100
Current - Input Bias (µA)	1.6	0.9	0.9	—	—	—	—	5.4	6
Voltage - Input Offset (mV)	1	3	3	—	—	—	—	4	0.8
Current - Supply (mA)	2.7	14	14	4	4	4	4	5.5	9.8
Current - Output / Channel (mA)	75	100	100	60	60	60	60	120	55
Voltage - Supply Span Min (V)	2.7	2.7	2.7	2.7	2.7	2.7	2.7	3.15	4.5
Voltage - Supply Span Max (V)	12.8	15	15	12.6	12.6	12.6	12.6	11	12
Operating Temperature (°C)	-40 to 85	-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	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5	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	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active
Inventory (Pcs)	38300	6718	3400	1800	1690	1283	2318	2700	65100

Engineering Selection Recommendations

Tier 1 - Direct Voltage Feedback Substitutes (Highest Compatibility):

The THS4221DBVR and THS4221DBVT are manufacturer-recommended substitutes from Texas Instruments. Both devices maintain voltage feedback topology, single-circuit configuration, and rail-to-rail output. The THS4221 series provides superior slew rate performance (990 V/µs versus 135 V/µs) and higher -3dB bandwidth (230 MHz versus 130 MHz). Supply voltage range extends to 15 V maximum. Both variants are ROHS3 compliant with MSL 1 rating and Active product status. Selection between DBVR (Tape & Reel packaging) and DBVT (Cut Tape & Digi-Reel packaging) depends on procurement and assembly requirements. Current supply requirement increases to 14 mA.

Tier 2 - Analog Devices Voltage Feedback Alternatives:

The LT6205 series (LT6205CS5#TRMPBF, LT6205HS5#TRMPBF, LT6205IS5#TRMPBF, LT6205IS5#TRPBF) from Analog Devices provides voltage feedback amplification in TSOT-23-5 package format. These devices deliver 600 V/µs slew rate and 60 mA output current per channel. Supply voltage range spans 2.7 V to 12.6 V, maintaining compatibility with the LMH6642MF/NOPB minimum specification. Current supply consumption is 4 mA, lower than both the original part and THS4221 series. All LT6205 variants are ROHS3 compliant with MSL 1 rating and Active status. Package footprint compatibility requires verification for TSOT-23-5 versus SC-74A/SOT-753 layouts.

Tier 3 - Buffer Amplifier Alternative:

The MAX4214EUK+T from Analog Devices/Maxim Integrated functions as a buffer amplifier with rail-to-rail output in SOT-23-5 package. This device provides 600 V/µs slew rate and 230 MHz -3dB bandwidth. Output current capability reaches 120 mA, exceeding the LMH6642MF/NOPB specification. Supply voltage range is 3.15 V to 11 V, with minimum specification above the original part's 2.7 V floor. Current supply is 5.5 mA. ROHS3 compliance and MSL 1 rating are maintained. Buffer topology differs from voltage feedback architecture; application circuit requirements must be evaluated.

Tier 4 - General Purpose Alternative:

The TSH80IYLT from STMicroelectronics is a general-purpose amplifier with automotive qualification (AEC-Q100). This device operates at 118 V/µs slew rate and 100 MHz -3dB bandwidth, both below the LMH6642MF/NOPB baseline. Supply voltage minimum is 4.5 V, exceeding the original part's 2.7 V specification. Output current is 55 mA, below the original 75 mA specification. Current supply is 9.8 mA. ROHS3 compliance and MSL 1 rating apply. This option is suitable only for applications with relaxed bandwidth and slew rate requirements and supply voltages ≥ 4.5 V.

All substitute parts maintain ROHS3 compliance, MSL 1 moisture sensitivity level, and Active product status. Selection criteria include packaging format compatibility, supply voltage requirements, bandwidth performance, slew rate specifications, and output current demands of the target application circuit.

Frequently Asked Questions (FAQ)

Q1: Can THS4221DBVR and THS4221DBVT be used interchangeably with LMH6642MF/NOPB?

A: Yes, both THS4221 variants are manufacturer-recommended substitutes. Electrical performance is compatible across voltage feedback topology, single-circuit configuration, and rail-to-rail output. The primary difference is packaging format: DBVR uses Tape & Reel (TR) packaging while DBVT uses Cut Tape (CT) & Digi-Reel® packaging. Selection depends on procurement and assembly line requirements. Current supply increases from 2.7 mA to 14 mA; verify power budget compatibility in the target application.

Q2: What is the difference between LT6205 variants (CS5, HS5, IS5)?

A: The LT6205 series variants differ in temperature grade and packaging designation. LT6205CS5#TRMPBF, LT6205HS5#TRMPBF, and LT6205IS5#TRMPBF all operate across -40°C to 85°C temperature range with identical electrical specifications. LT6205IS5#TRPBF is an alternative packaging variant of the IS5 grade. All variants are ROHS3 compliant with MSL 1 rating. Electrical performance is equivalent; selection is based on inventory availability and procurement lead time.

Q3: Is MAX4214EUK+T a direct substitute for LMH6642MF/NOPB?

A: MAX4214EUK+T is functionally compatible but operates as a buffer amplifier rather than a voltage feedback amplifier. While both devices provide rail-to-rail output in SOT-23-5 package with 230 MHz -3dB bandwidth, the buffer topology differs from voltage feedback architecture. Application circuit design must be evaluated to confirm buffer operation is suitable. Supply voltage minimum is 3.15 V, above the LMH6642MF/NOPB specification of 2.7 V. Output current capability (120 mA) exceeds the original part (75 mA).

Q4: Can TSH80IYLT replace LMH6642MF/NOPB in all applications?

A: TSH80IYLT is not a direct substitute. This general-purpose amplifier has reduced performance specifications: 118 V/µs slew rate (versus 135 V/µs), 100 MHz -3dB bandwidth (versus 130 MHz), and 55 mA output current (versus 75 mA). Supply voltage minimum is 4.5 V, incompatible with applications requiring 2.7 V operation. TSH80IYLT is suitable only for applications with relaxed bandwidth and slew rate requirements and supply voltages ≥ 4.5 V. Automotive qualification (AEC-Q100) is available if required.

Q5: Are package footprints compatible between SC-74A/SOT-753 and TSOT-23-5?

A: SC-74A and SOT-753 designations refer to the same 5-pin small-outline package. TSOT-23-5 (Thin SOT-23-5) is a variant with reduced height. While pin pitch and general layout are similar, TSOT-23-5 components may not be directly interchangeable on PCBs designed for standard SOT-23-5 packages due to height differences and potential solder reflow profile variations. PCB layout and assembly process compatibility must be verified before substitution.

Q6: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Amplifier topology (voltage feedback preferred), (2) Single-circuit configuration, (3) Rail-to-rail output capability, (4) Operating temperature range (-40°C to 85°C), (5) Supply voltage overlap (minimum 2.7 V), (6) Slew rate ≥ 135 V/µs, (7) -3dB bandwidth ≥ 130 MHz, (8) Output current ≥ 75 mA, (9) SOT-23-5 package compatibility, (10) ROHS3 compliance and MSL 1 rating. Deviations from these parameters require application-specific evaluation.

Q7: How does supply current consumption affect substitution decisions?

A: LMH6642MF/NOPB draws 2.7 mA supply current. THS4221 series requires 14 mA, LT6205 series requires 4 mA, MAX4214 requires 5.5 mA, and TSH80IYLT requires 9.8 mA. Higher current consumption increases power dissipation and thermal load. Applications with strict power budgets or battery operation must account for increased current draw. Verify power supply capacity and thermal management capability before substitution.

Q8: Are all substitute parts available in equivalent packaging options?

A: Packaging availability varies. LMH6642MF/NOPB is available in Cut Tape (CT) & Digi-Reel® format. THS4221DBVR is Tape & Reel (TR); THS4221DBVT is Cut Tape (CT) & Digi-Reel®. LT6205 series is available in Tape & Reel (TR) format. MAX4214EUK+T is Cut Tape (CT) & Digi-Reel®. TSH80IYLT is Tape & Reel (TR). Procurement requirements and assembly line compatibility determine optimal packaging selection.

Q9: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain ROHS3 compliance, indicating restriction of hazardous substances per EU Directive 2011/65/EU. All devices have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control. All parts are classified as Active product status, confirming ongoing manufacturer support and availability. REACH status is unaffected for all devices. ECCN classification is EAR99 for all parts, indicating general commercial items.

Q10: Which substitute provides the best performance upgrade from LMH6642MF/NOPB?

A: THS4221DBVR and THS4221DBVT provide the most significant performance upgrade: slew rate increases from 135 V/µs to 990 V/µs (7.3× improvement), -3dB bandwidth increases from 130 MHz to 230 MHz (1.77× improvement), and output current increases from 75 mA to 100 mA. Supply voltage range extends to 15 V maximum. These improvements are offset by increased supply current (14 mA versus 2.7 mA). For applications prioritizing speed and bandwidth over power consumption, THS4221 series is the optimal choice.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message