LMH6624MFX Equivalent & Substitute Parts

Part Overview

The LMH6624MFX is a voltage feedback operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit IC opamp is designed for high-speed applications requiring a gain bandwidth product of 1.5 GHz and a slew rate of 400V/µs. The main part number LMH6624MFX is currently classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity.

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	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LMH6624MFX are classified into two categories based on electrical parameter compatibility and product status:

Direct Equivalents (Texas Instruments LMH6624 Series): Parts LMH6624MFX/NOPB, LMH6624MF, and LMH6624MF/NOPB maintain identical electrical specifications across all critical parameters: 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). These parts differ only in packaging format (Tape & Reel versus Cut Tape) and product status (Active versus Last Time Buy versus Obsolete). All operate across the -40°C to 125°C temperature range and use the SOT-23-5 package.

Parametric Equivalents (Analog Devices LT1815 Series): Parts LT1815CS5#TR, LT1815CS5#TRMPBF, LT1815CS5#TRPBF, and LT1815IS5#TRMPBF are voltage feedback operational amplifiers with the same single-circuit configuration and SOT-23-5 package footprint. However, these parts exhibit different electrical performance characteristics: higher slew rate (1500V/µs), lower gain bandwidth product (220 MHz), higher -3dB bandwidth (350 MHz), lower input bias current (2 µA), higher input offset voltage (200 µV), lower supply current (6.5 mA), and lower output current (80 mA). Supply voltage range is 2.5V to 11V. Temperature ranges vary: LT1815CS5 variants operate at 0°C to 70°C, while LT1815IS5#TRMPBF operates at -40°C to 85°C.

Substitution eligibility is determined by matching the following key parameters: amplifier type (voltage feedback), number of circuits (1), package type (SOT-23-5), mounting type (surface mount), and compliance requirements (RoHS status, MSL rating).

Parameter Comparison

Parameter	LMH6624MFX	LMH6624MFX/NOPB	LMH6624MF	LMH6624MF/NOPB	LT1815CS5#TR	LT1815CS5#TRMPBF	LT1815CS5#TRPBF	LT1815IS5#TRMPBF
Manufacturer	Texas Instruments	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	Voltage Feedback
Number of Circuits	1	1	1	1	1	1	1	1
Slew Rate (V/µs)	400	400	400	400	1500	1500	1500	1500
Gain Bandwidth Product (GHz)	1.5	1.5	1.5	1.5	0.22	0.22	0.22	0.22
-3dB Bandwidth (MHz)	95	95	95	95	350	350	350	350
Current - Input Bias (µA)	13	13	13	13	2	2	2	2
Voltage - Input Offset (µV)	100	100	100	100	200	200	200	200
Current - Supply (mA)	12	12	12	12	6.5	6.5	6.5	6.5
Current - Output / Channel (mA)	100	100	100	100	80	80	80	80
Voltage - Supply Span Min (V)	5	5	5	5	2.5	2.5	2.5	2.5
Voltage - Supply Span Max (V)	12	12	12	12	11	11	11	11
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	-40 to 125	0 to 70	0 to 70	0 to 70	-40 to 85
Package / Case	SC-74A, SOT-753	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	SOT-23-5	TSOT-23-5	TSOT-23-5	TSOT-23-5	TSOT-23-5
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Last Time Buy	Active	Active	Active	Active	Active
Inventory (Pcs)	496400	2037	1316	16425	1012	2180	1988	2409

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select LMH6624MF/NOPB as the primary substitute for LMH6624MFX. This part maintains all electrical specifications of the original component while offering Active product status and ROHS3 compliance. With 16,425 units in stock, LMH6624MF/NOPB provides the highest inventory availability among direct equivalents. The part is supplied in Tape & Reel packaging suitable for automated assembly processes.

Alternative direct equivalents include LMH6624MFX/NOPB (Active status, 2,037 units available) and LMH6624MF (Last Time Buy status, 1,316 units available). Both maintain identical electrical parameters and SOT-23-5 packaging but differ in packaging format and product lifecycle status.

For Parametric Substitution (Different Electrical Performance):

The Analog Devices LT1815 series (LT1815CS5#TRMPBF, LT1815CS5#TRPBF, LT1815IS5#TRMPBF, LT1815CS5#TR) provides functional substitution with modified electrical characteristics. These parts are suitable only when application requirements accommodate the following parameter differences: higher slew rate (1500V/µs versus 400V/µs), lower gain bandwidth product (220 MHz versus 1.5 GHz), higher -3dB bandwidth (350 MHz versus 95 MHz), lower input bias current (2 µA versus 13 µA), and lower output current capability (80 mA versus 100 mA).

LT1815IS5#TRMPBF is the recommended LT1815 variant for temperature-critical applications, supporting -40°C to 85°C operation. LT1815CS5#TRMPBF and LT1815CS5#TRPBF are suitable for 0°C to 70°C applications. All LT1815 variants are ROHS3 compliant and available in active production status with adequate inventory levels (1,012 to 2,409 units).

Compliance Considerations:

The original LMH6624MFX is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for new designs and production. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can LMH6624MF/NOPB be used as a direct replacement for LMH6624MFX?

A: Yes. LMH6624MF/NOPB is a direct electrical equivalent with identical specifications across all performance parameters: slew rate, gain bandwidth product, bandwidth, input bias current, input offset voltage, supply current, output current, and operating temperature range. The primary differences are packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete). Both use the SOT-23-5 package and are pin-compatible.

Q: What are the key differences between LMH6624 and LT1815 series parts?

A: The LMH6624 and LT1815 are distinct product families with different performance characteristics. LMH6624 offers higher gain bandwidth product (1.5 GHz) and lower slew rate (400V/µs), while LT1815 provides lower gain bandwidth product (220 MHz) and higher slew rate (1500V/µs). LMH6624 has higher input bias current (13 µA) and higher output current capability (100 mA), while LT1815 has lower input bias current (2 µA) and lower output current (80 mA). Supply current is lower in LT1815 (6.5 mA versus 12 mA). These differences make LT1815 suitable for low-power, high-slew-rate applications, while LMH6624 is optimized for high-bandwidth, high-output-current applications.

Q: Are the SOT-23-5 and TSOT-23-5 packages physically compatible?

A: Both SOT-23-5 and TSOT-23-5 are five-pin surface mount packages with identical pin pitch and footprint dimensions. TSOT-23-5 is a thin variant of SOT-23-5. Parts using either package designation are mechanically compatible on standard SOT-23-5 PCB footprints. Verify specific package dimensions in manufacturer datasheets if space constraints are critical.

Q: Why is LMH6624MFX classified as obsolete?

A: The LMH6624MFX is marked as obsolete by Texas Instruments, indicating the manufacturer has discontinued active production and support. However, 496,400 units remain in inventory. For new designs and long-term production, selection of Active-status alternatives (LMH6624MF/NOPB or LT1815 series) is recommended to ensure ongoing availability and manufacturer support.

Q: Which substitute part offers the best inventory availability?

A: LMH6624MF/NOPB provides the highest inventory among direct equivalents with 16,425 units in stock. Among the LT1815 series parametric equivalents, LT1815IS5#TRMPBF offers the highest inventory with 2,409 units available.

Q: Can LT1815IS5#TRMPBF replace LMH6624MFX in temperature-critical applications?

A: LT1815IS5#TRMPBF supports -40°C to 85°C operation, which covers the lower end of the LMH6624MFX temperature range (-40°C to 125°C). If the application requires operation above 85°C, LT1815IS5#TRMPBF is not suitable. For full temperature range coverage with LT1815 series, no variant extends to 125°C. In such cases, LMH6624MF/NOPB remains the appropriate choice.

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

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS compliance. Parts with /NOPB designation meet RoHS3 requirements and are suitable for applications subject to lead-free regulations. The original LMH6624MFX lacks this suffix and is RoHS non-compliant.

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