LMH6624MF Equivalent & Substitute Parts

Part Overview

The LMH6624MF is a voltage feedback operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit op-amp is designed for high-speed applications with a gain bandwidth product of 1.5 GHz and a slew rate of 400V/µs. The device operates across a supply voltage range of 5V to 12V and is rated for temperatures from -40°C to 125°C.

The LMH6624MF currently holds Last Time Buy status, indicating that Texas Instruments has discontinued this product line. This status necessitates identification of equivalent and substitute parts to ensure design continuity and procurement availability for ongoing production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	1	—
Slew Rate	400	V/µs
Gain Bandwidth Product	1.5	GHz
-3dB Bandwidth	95	MHz
Current - Input Bias	13	µA
Voltage - Input Offset	100	µV
Current - Supply	12	mA
Current - Output / Channel	100	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LMH6624MF are classified into two categories based on electrical parameter compatibility and product status:

Parametric Equivalents (Texas Instruments LMH6624 Series): These parts maintain identical electrical specifications to the LMH6624MF, including slew rate (400V/µs), gain bandwidth product (1.5 GHz), -3dB bandwidth (95 MHz), input bias current (13 µA), input offset voltage (100 µV), supply current (12 mA), output current (100 mA), and supply voltage range (5V to 12V). They differ only in packaging configuration (Cut Tape vs. Tape & Reel) and product status (Last Time Buy vs. Active). These parts are direct functional replacements with no circuit redesign required.

Manufacturer Recommended Alternatives (Analog Devices LT1815 Series): The LT1815 series represents manufacturer-recommended substitutes with different electrical characteristics. These parts maintain the same amplifier type (voltage feedback), single-circuit configuration, surface mount packaging (SOT-23-5), and compliance certifications (ROHS3, MSL 1). However, they exhibit superior performance in slew rate (1500V/µs vs. 400V/µs), lower input bias current (2 µA vs. 13 µA), reduced supply current (6.5 mA vs. 12 mA), and lower output current (80 mA vs. 100 mA). The LT1815 series operates across a wider supply voltage range (2.5V to 11V) but has a narrower operating temperature range (0°C to 70°C for commercial grade, -40°C to 85°C for industrial grade).

Parameter Comparison

Parameter	LMH6624MF	LMH6624MF/NOPB	LMH6624MFX/NOPB	LT1815CS5#TR	LT1815CS5#TRMPBF	LT1815CS5#TRPBF	LT1815IS5#TRMPBF
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1	1	1	1	1
Slew Rate (V/µs)	400	400	400	1500	1500	1500	1500
Gain Bandwidth Product (GHz)	1.5	1.5	1.5	0.22	0.22	0.22	0.22
-3dB Bandwidth (MHz)	95	95	95	350	350	350	350
Current - Input Bias (µA)	13	13	13	2	2	2	2
Voltage - Input Offset (µV)	100	100	100	200	200	200	200
Current - Supply (mA)	12	12	12	6.5	6.5	6.5	6.5
Current - Output / Channel (mA)	100	100	100	80	80	80	80
Voltage - Supply Span (Min) (V)	5	5	5	2.5	2.5	2.5	2.5
Voltage - Supply Span (Max) (V)	12	12	12	11	11	11	11
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	0 to 70	0 to 70	0 to 70	-40 to 85
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	TSOT-23-5	TSOT-23-5	TSOT-23-5	TSOT-23-5
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active
RoHS Status	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)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory (Pcs)	1316	16425	2037	1012	2180	1988	2409

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

Select LMH6624MF/NOPB or LMH6624MFX/NOPB when circuit performance specifications require exact electrical parameter matching to the original LMH6624MF design. Both parts maintain identical electrical characteristics and are ROHS3 compliant with MSL 1 rating. LMH6624MF/NOPB is supplied in Tape & Reel packaging with Active product status and higher inventory availability (16,425 units). LMH6624MFX/NOPB is also Active status with Tape & Reel packaging and 2,037 units in stock. These parts require no circuit redesign and provide direct functional substitution.

For Performance Enhancement (Manufacturer Recommended Alternatives):

The Analog Devices LT1815 series offers superior electrical performance characteristics suitable for applications where enhanced specifications provide design benefits. The LT1815IS5#TRMPBF is recommended for applications requiring extended operating temperature range (-40°C to 85°C), matching the original LMH6624MF temperature specification. This part features 1500V/µs slew rate (3.75× faster), 350 MHz -3dB bandwidth (3.68× wider), 2 µA input bias current (6.5× lower), and 6.5 mA supply current (46% reduction). All LT1815 variants are Active status, ROHS3 compliant, and MSL 1 rated.

The LT1815CS5#TRMPBF and LT1815CS5#TRPBF are suitable for applications with 0°C to 70°C operating temperature requirements. Selection between these variants depends on packaging and traceability requirements specific to procurement specifications.

Frequently Asked Questions (FAQ)

Q: Can LMH6624MF/NOPB be used as a direct replacement for LMH6624MF?

A: Yes. LMH6624MF/NOPB is a parametric equivalent with identical electrical specifications. The difference is packaging configuration: LMH6624MF is supplied in Cut Tape format, while LMH6624MF/NOPB is supplied in Tape & Reel format. Both are SOT-23-5 packages with identical pinout and electrical performance. No circuit modifications are required.

Q: What are the key differences between LMH6624MF and LT1815 series substitutes?

A: The LT1815 series offers superior performance in slew rate (1500V/µs vs. 400V/µs), -3dB bandwidth (350 MHz vs. 95 MHz), and lower input bias current (2 µA vs. 13 µA). However, the LT1815 has lower gain bandwidth product (220 MHz vs. 1.5 GHz). The LT1815 operates at lower supply current (6.5 mA vs. 12 mA) and reduced output current (80 mA vs. 100 mA). Operating temperature ranges differ: LMH6624MF operates -40°C to 125°C, while LT1815CS5 operates 0°C to 70°C and LT1815IS5 operates -40°C to 85°C.

Q: Which LT1815 variant should be selected for wide temperature range applications?

A: LT1815IS5#TRMPBF is specified for -40°C to 85°C operating temperature, providing the widest temperature range among LT1815 variants. This matches the lower end of the original LMH6624MF temperature specification (-40°C to 125°C). For applications requiring operation above 85°C, the LMH6624MF/NOPB parametric equivalent is required.

Q: Are all substitute parts compatible with existing PCB layouts designed for LMH6624MF?

A: Yes. All substitute parts use SOT-23-5 or TSOT-23-5 packages with identical pinout and footprint compatibility. Surface mount placement and reflow parameters remain compatible. No PCB redesign is required for any listed substitute.

Q: What is the significance of the /NOPB suffix in LMH6624MF/NOPB?

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging, confirming ROHS3 compliance. This is a manufacturing designation and does not affect electrical performance or functionality.

Q: Why does LMH6624MF have Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued the LMH6624MF product line and will no longer manufacture this part after existing inventory is depleted. This necessitates transition to alternative parts for future production requirements.

Q: Can LT1815 series parts be used in applications originally designed for LMH6624MF without circuit modifications?

A: LT1815 series parts are pin-compatible and can be physically substituted. However, circuit performance will differ due to different electrical specifications. Applications sensitive to gain bandwidth product, slew rate, or input bias current characteristics may require circuit analysis and potential design adjustments. Verification testing is the responsibility of the design engineer.

Q: What inventory considerations should guide substitute part selection?

A: LMH6624MF/NOPB has the highest inventory availability (16,425 units), followed by LT1815IS5#TRMPBF (2,409 units) and LT1815CS5#TRMPBF (2,180 units). For immediate procurement needs, LMH6624MF/NOPB provides the most reliable supply. For long-term production planning, multiple LT1815 variants offer distributed inventory across manufacturers.

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