LMH6609MF Equivalent & Substitute Parts

Part Overview

The LMH6609MF 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 slew rate of 1400V/µs and -3dB bandwidth of 900 MHz. The LMH6609MF is classified as obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. Substitute parts must maintain compatibility with the SOT-23-5 package footprint and deliver equivalent electrical performance within the specified operating parameters.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	1	—
Slew Rate	1400	V/µs
-3dB Bandwidth	900	MHz
Current - Input Bias	2	µA
Voltage - Input Offset	800	µV
Current - Supply	7	mA
Current - Output / Channel	90	mA
Voltage - Supply Span (Min)	6	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 85	°C
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts for the LMH6609MF are evaluated based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

Amplifier Type: Voltage Feedback
Number of Circuits: 1
Package / Case: SC-74A, SOT-753 (SOT-23-5)
Mounting Type: Surface Mount
Operating Temperature Range: -40°C to 85°C

Performance Parameters:

Slew Rate: 1400V/µs (primary specification)
-3dB Bandwidth: 900 MHz (primary specification)
Current - Input Bias: 2 µA
Voltage - Input Offset: 800 µV
Current - Supply: 7 mA
Current - Output / Channel: 90 mA
Voltage - Supply Span: 6V to 12V

Substitutes are grouped into two categories:

Category 1 - Direct Equivalent (Identical Electrical Performance): LMH6609MF/NOPB maintains all electrical specifications of the original part with identical slew rate (1400V/µs) and bandwidth (900 MHz). This part differs only in packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Category 2 - Functional Alternatives (Performance Variations): MAX4304EUK+T, MAX4104EUK+T, MAX4305EUK+T, and MAX4430EUK+T are voltage feedback amplifiers in SOT-23-5 packages with varying electrical characteristics. These parts maintain package compatibility and operating temperature range but exhibit differences in slew rate, bandwidth, input bias current, supply current, and supply voltage span. Selection from this category requires verification that application-specific performance tolerances accommodate the parameter deviations.

Parameter Comparison

Parameter	LMH6609MF	LMH6609MF/NOPB	MAX4104EUK+T	MAX4304EUK+T	MAX4305EUK+T	MAX4430EUK+T	Unit
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	General Purpose	—
Number of Circuits	1	1	1	1	1	1	—
Slew Rate	1400	1400	400	1000	1400	100	V/µs
-3dB Bandwidth	900	900	625	740	340	180	MHz
Current - Input Bias	2	2	32	32	32	11	µA
Voltage - Input Offset	800	800	1000	1000	1000	1250	µV
Current - Supply	7	7	20	20	20	11	mA
Current - Output / Channel	90	90	70	—	—	60	mA
Voltage - Supply Span (Min)	6	6	7	7	7	9	V
Voltage - Supply Span (Max)	12	12	11	11	11	11	V
Operating Temperature	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	°C
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	—
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	—
Product Status	Obsolete	Active	Active	Active	Active	Active	—
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

LMH6609MF/NOPB (Direct Equivalent)

The LMH6609MF/NOPB is the primary substitute for the obsolete LMH6609MF. This part is manufactured by Texas Instruments and maintains identical electrical specifications across all measured parameters: 1400V/µs slew rate, 900 MHz bandwidth, 2 µA input bias current, 800 µV input offset voltage, 7 mA supply current, and 90 mA output current. The only differences are packaging format (Tape & Reel vs. bulk) and product status (Active vs. Obsolete). The LMH6609MF/NOPB carries ROHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements. With 18,886 units in stock, this part provides immediate procurement availability. This substitute is suitable for direct replacement in all applications where the original LMH6609MF was specified.

MAX4304EUK+T (Performance Alternative)

The MAX4304EUK+T, manufactured by Analog Devices Inc./Maxim Integrated, is a voltage feedback amplifier in SOT-23-5 package with 1000V/µs slew rate and 740 MHz bandwidth. This part exhibits higher input bias current (32 µA vs. 2 µA) and higher supply current (20 mA vs. 7 mA) compared to the original specification. The supply voltage span is narrower (7V to 11V vs. 6V to 12V). Selection of this part requires confirmation that the application tolerates reduced bandwidth (740 MHz vs. 900 MHz), increased power consumption, and higher input bias current. ROHS3 compliance and active product status support long-term availability.

MAX4104EUK+T (Performance Alternative)

The MAX4104EUK+T is a voltage feedback amplifier with 400V/µs slew rate and 625 MHz bandwidth. This part exhibits the lowest slew rate and bandwidth among the substitute options, with 32 µA input bias current and 20 mA supply current. The supply voltage span is 7V to 11V. This part is suitable only for applications where reduced bandwidth and slew rate are acceptable. ROHS3 compliance and active product status are confirmed.

MAX4305EUK+T (Performance Alternative)

The MAX4305EUK+T maintains the 1400V/µs slew rate of the original part but provides only 340 MHz bandwidth. Input bias current is 32 µA, supply current is 20 mA, and supply voltage span is 7V to 11V. This part is suitable for applications requiring high slew rate but tolerating significantly reduced bandwidth. ROHS3 compliance and active product status are confirmed.

MAX4430EUK+T (Performance Alternative)

The MAX4430EUK+T is classified as a general purpose amplifier with 100V/µs slew rate and 180 MHz bandwidth. This part exhibits the lowest performance specifications among all substitutes. Input bias current is 11 µA, supply current is 11 mA, and supply voltage span is 9V to 11V. This part is suitable only for low-frequency applications where bandwidth and slew rate requirements are minimal. ROHS3 compliance and active product status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can LMH6609MF/NOPB be used as a direct replacement for LMH6609MF?

A: Yes. The LMH6609MF/NOPB is electrically identical to the LMH6609MF across all specified parameters. The difference is packaging format (Tape & Reel) and product status (Active). Both parts are housed in SOT-23-5 packages with identical pin configurations and electrical performance. The LMH6609MF/NOPB is suitable for direct replacement in all applications.

Q: What are the key differences between LMH6609MF and MAX4304EUK+T?

A: The MAX4304EUK+T has lower slew rate (1000V/µs vs. 1400V/µs), lower bandwidth (740 MHz vs. 900 MHz), higher input bias current (32 µA vs. 2 µA), higher supply current (20 mA vs. 7 mA), and narrower supply voltage span (7V to 11V vs. 6V to 12V). Both parts are housed in SOT-23-5 packages and operate across -40°C to 85°C. Selection requires verification that the application tolerates these performance variations.

Q: Are all substitute parts in SOT-23-5 packages?

A: Yes. All substitute parts listed—LMH6609MF/NOPB, MAX4104EUK+T, MAX4304EUK+T, MAX4305EUK+T, and MAX4430EUK+T—are housed in SOT-23-5 packages (SC-74A, SOT-753 case designations). All are surface mount components with identical footprints and pin configurations.

Q: Which substitute part has the closest performance to the original LMH6609MF?

A: The LMH6609MF/NOPB is electrically identical to the original part. Among the Maxim alternatives, the MAX4305EUK+T maintains the 1400V/µs slew rate but provides reduced bandwidth (340 MHz vs. 900 MHz). The MAX4304EUK+T offers a compromise with 1000V/µs slew rate and 740 MHz bandwidth.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate across the same temperature range as the original LMH6609MF: -40°C to 85°C.

Q: Are all substitute parts RoHS compliant?

A: The LMH6609MF is RoHS non-compliant. All substitute parts—LMH6609MF/NOPB, MAX4104EUK+T, MAX4304EUK+T, MAX4305EUK+T, and MAX4430EUK+T—are ROHS3 compliant, meeting modern regulatory requirements for new designs.

Q: What is the minimum supply voltage for each substitute part?

A: LMH6609MF and LMH6609MF/NOPB operate at 6V minimum. MAX4104EUK+T, MAX4304EUK+T, and MAX4305EUK+T require 7V minimum. MAX4430EUK+T requires 9V minimum. Applications with 6V supply voltage can only use LMH6609MF or LMH6609MF/NOPB.

Q: Which substitute part has the lowest power consumption?

A: The LMH6609MF and LMH6609MF/NOPB have the lowest supply current at 7 mA. MAX4430EUK+T draws 11 mA. MAX4104EUK+T, MAX4304EUK+T, and MAX4305EUK+T all draw 20 mA.

Q: Can MAX4430EUK+T replace LMH6609MF in high-frequency applications?

A: No. The MAX4430EUK+T is classified as a general purpose amplifier with 180 MHz bandwidth and 100V/µs slew rate, significantly lower than the LMH6609MF specifications (900 MHz bandwidth, 1400V/µs slew rate). This part is suitable only for low-frequency applications.

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