LMC6494BEMX Equivalent & Substitute Parts

Part Overview

The LMC6494BEMX is a CMOS 4-circuit operational amplifier in 14-SOIC surface mount packaging, manufactured by Texas Instruments. This device features rail-to-rail output capability and is designed for general-purpose amplification applications requiring low input bias current and wide supply voltage range operation.

The LMC6494BEMX carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	1.3	V/µs
Gain Bandwidth Product	1.5	MHz
Current - Input Bias	0.15	pA
Voltage - Input Offset	110	µV
Current - Supply (x4 Channels)	2.6	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 125	°C (TJ)
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the LMC6494BEMX is determined by the following critical parameters:

Primary Substitution Criteria:

Number of circuits: 4 channels
Package type: 14-SOIC surface mount
Output configuration: Rail-to-rail
Supply voltage range compatibility: Minimum 2.5 V to maximum 15.5 V
Operating temperature range: -40°C to 125°C
Amplifier topology: CMOS or General Purpose

Substitution Logic:

The LMC6494BEMX/NOPB is a direct equivalent from Texas Instruments, differing only in packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete). This part maintains identical electrical specifications and pinout compatibility.

The MCP6H04-E/SL and MCP6H04T-E/SL from Microchip Technology are functional substitutes. These general-purpose amplifiers provide 4 circuits in 14-SOIC packaging with rail-to-rail output. While slew rate (0.8 V/µs) and gain bandwidth product (1.2 MHz) are lower, supply voltage range (3.5 V to 16 V) and operating temperature (-40°C to 125°C) are compatible. Input bias current (10 pA) is higher than the original part.

The TS914IDT from STMicroelectronics is a CMOS 4-circuit amplifier in 14-SOIC packaging with rail-to-rail output, compatible supply voltage (2.7 V to 16 V), and operating temperature range. This part includes automotive qualification (AEC-Q100).

The TS924AIYDT and TS954IDT from STMicroelectronics are general-purpose alternatives with enhanced performance characteristics, automotive qualification, and compatible packaging. These parts support the full operating temperature range and supply voltage requirements.

The ALD4704BSBL from Advanced Linear Devices Inc. is a CMOS 4-circuit amplifier with push-pull, rail-to-rail output in 14-SOIC packaging. This part has a narrower supply voltage range (6.5 V to 12 V) and operating temperature range (0°C to 70°C), limiting its applicability to designs within these constraints.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Output Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
LMC6494BEMX	Texas Instruments	CMOS	4	Rail-to-Rail	1.3	1.5	0.15	110	2.6	30	2.5	15.5	-40 to 125	14-SOIC	Obsolete
LMC6494BEMX/NOPB	Texas Instruments	CMOS	4	Rail-to-Rail	1.3	1.5	0.15	110	2.6	30	2.5	15.5	-40 to 125	14-SOIC	Active
MCP6H04-E/SL	Microchip Technology	General Purpose	4	Rail-to-Rail	0.8	1.2	10	700	0.135	50	3.5	16	-40 to 125	14-SOIC	Active
MCP6H04T-E/SL	Microchip Technology	General Purpose	4	Rail-to-Rail	0.8	1.2	10	700	0.135	50	3.5	16	-40 to 125	14-SOIC	Active
TS914IDT	STMicroelectronics	CMOS	4	Rail-to-Rail	1.0	1.4	1	10	0.23	60	2.7	16	-40 to 125	14-SOIC	Active
TS924AIYDT	STMicroelectronics	General Purpose	4	Rail-to-Rail	1.3	4.0	15	900	1.0	80	2.7	12	-40 to 125	14-SOIC	Active
TS954IDT	STMicroelectronics	General Purpose	4	Rail-to-Rail	1.0	3.0	35	6	0.95	10	2.7	12	-40 to 125	14-SOIC	Active
ALD4704BSBL	Advanced Linear Devices Inc.	CMOS	4	Push-Pull, Rail-to-Rail	5.0	2.1	1	2000	10	15	6.5	12	0 to 70	14-SOIC	Active

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

The LMC6494BEMX/NOPB from Texas Instruments is the primary direct substitute. This part maintains identical electrical specifications, pinout configuration, and functional performance as the obsolete LMC6494BEMX. The only difference is product status (Active) and packaging format (Tape & Reel). This part is RoHS3 compliant, addressing regulatory requirements that the original part does not meet.

Primary Functional Alternatives (Active Status, Full Temperature Range):

The MCP6H04-E/SL and MCP6H04T-E/SL from Microchip Technology are suitable alternatives for applications where lower slew rate and gain bandwidth product are acceptable. These parts are RoHS3 compliant and maintain the full -40°C to 125°C operating temperature range. The MCP6H04T-E/SL is packaged in Tape & Reel format, while the MCP6H04-E/SL is supplied in Tube packaging. Both provide 4 circuits in 14-SOIC packaging with rail-to-rail output and compatible supply voltage range (3.5 V to 16 V).

The TS914IDT from STMicroelectronics is a CMOS alternative with automotive qualification (AEC-Q100). This part provides performance characteristics closely aligned with the original LMC6494BEMX, including slew rate (1.0 V/µs) and gain bandwidth product (1.4 MHz). Supply voltage range (2.7 V to 16 V) and operating temperature (-40°C to 125°C) are compatible. RoHS3 compliance is confirmed.

Enhanced Performance Alternatives (Automotive Grade):

The TS924AIYDT and TS954IDT from STMicroelectronics offer enhanced performance with automotive qualification (AEC-Q100) and RoHS3 compliance. The TS924AIYDT provides higher gain bandwidth product (4 MHz) and slew rate (1.3 V/µs) matching the original part. The TS954IDT offers 3 MHz gain bandwidth product with lower output current per channel (10 mA). Both parts have narrower maximum supply voltage (12 V) compared to the original part (15.5 V).

Limited Applicability Alternative:

The ALD4704BSBL from Advanced Linear Devices Inc. is suitable only for applications operating within the narrower supply voltage range (6.5 V to 12 V) and operating temperature range (0°C to 70°C). This part features push-pull, rail-to-rail output and higher slew rate (5.0 V/µs), but reduced output current per channel (15 mA) compared to the original part (30 mA).

Frequently Asked Questions (FAQ)

Q: Can the LMC6494BEMX/NOPB be used as a direct replacement for the LMC6494BEMX?

A: Yes. The LMC6494BEMX/NOPB is electrically and functionally identical to the LMC6494BEMX. The difference is packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete). The /NOPB suffix indicates "No Lead Free Plating" packaging. Both parts are pinout-compatible and have identical electrical specifications.

Q: What are the key differences between the MCP6H04 series and the LMC6494BEMX?

A: The MCP6H04-E/SL and MCP6H04T-E/SL are general-purpose amplifiers with lower slew rate (0.8 V/µs versus 1.3 V/µs) and lower gain bandwidth product (1.2 MHz versus 1.5 MHz). Input bias current is higher (10 pA versus 0.15 pA). However, these parts are RoHS3 compliant, have active product status, and support the full -40°C to 125°C operating temperature range. Supply voltage range is slightly wider (3.5 V to 16 V).

Q: Are the STMicroelectronics TS914IDT, TS924AIYDT, and TS954IDT suitable for automotive applications?

A: Yes. All three STMicroelectronics parts carry automotive qualification (AEC-Q100) and are suitable for automotive-grade applications. The TS914IDT provides performance most closely aligned with the original LMC6494BEMX. The TS924AIYDT and TS954IDT offer enhanced performance characteristics with higher gain bandwidth product.

Q: What is the impact of the narrower supply voltage range on the TS924AIYDT and TS954IDT?

A: Both parts have a maximum supply voltage of 12 V, compared to 15.5 V for the LMC6494BEMX. Applications requiring supply voltages above 12 V cannot use these parts. Applications operating within the 2.7 V to 12 V range are compatible.

Q: Is the ALD4704BSBL a suitable substitute for all applications using the LMC6494BEMX?

A: No. The ALD4704BSBL has a narrower operating temperature range (0°C to 70°C versus -40°C to 125°C) and narrower supply voltage range (6.5 V to 12 V versus 2.5 V to 15.5 V). This part is suitable only for applications operating within these narrower specifications. Additionally, output current per channel is reduced (15 mA versus 30 mA).

Q: What is the significance of RoHS compliance in selecting a substitute?

A: The original LMC6494BEMX is RoHS non-compliant. All substitute parts listed (LMC6494BEMX/NOPB, MCP6H04-E/SL, MCP6H04T-E/SL, TS914IDT, TS924AIYDT, TS954IDT, and ALD4704BSBL) are RoHS3 compliant. RoHS3 compliance is required for products sold in regions with RoHS regulations and is increasingly required by original equipment manufacturers.

Q: How do packaging formats (Tube, Tape & Reel, Cut Tape) affect part selection?

A: Packaging format affects order quantity, handling, and assembly process compatibility. Tube packaging is suitable for lower-volume orders and manual assembly. Tape & Reel (TR) and Cut Tape (CT) formats are designed for automated pick-and-place assembly. The electrical and functional specifications are identical across packaging formats for the same part number base.

Q: Can the LMC6494BEMX be used in new designs, or should substitutes be selected?

A: The LMC6494BEMX carries Obsolete product status. For new designs, selection of an active substitute is recommended to ensure long-term supply chain availability and support. The LMC6494BEMX/NOPB is the recommended choice for designs requiring identical electrical specifications and pinout compatibility.

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