LMC6494BEM CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The LMC6494BEM is a CMOS amplifier integrated circuit manufactured by Texas Instruments, featuring four independent operational amplifier circuits in a 14-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production requirements. The LMC6494BEM operates across a wide supply voltage range of 2.5V to 15.5V with rail-to-rail output capability, making it suitable for low-power analog signal processing applications.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	LMC6494BEM	—
Manufacturer	Texas Instruments	—
Number of Circuits	4	—
Amplifier Type	CMOS	—
Output Type	Rail-to-Rail	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
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	2.6 (x4 Channels)	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)
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the LMC6494BEM is determined by strict alignment of the following critical parameters:

Package Compatibility: All substitute parts must use the 14-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility without layout modifications.

Circuit Configuration: All substitutes must provide four independent amplifier circuits in a single package to maintain functional equivalence.

Output Architecture: Rail-to-rail output capability is required to preserve signal swing characteristics across the specified supply voltage range.

Electrical Performance Envelope: Substitute parts must operate within the supply voltage range of 2.5V to 15.5V minimum. Operating temperature range of -40°C to 125°C is required for industrial and extended temperature applications.

Compliance Status: Active product status and RoHS3 compliance are preferred for new designs and long-term availability, though functional equivalence is the primary selection criterion.

Substitutes are grouped into two categories: direct packaging equivalents (identical packaging and configuration) and functional equivalents (same circuit count and output type with compatible electrical characteristics).

Parameter Comparison

Parameter	LMC6494BEM	LMC6494BEM/NOPB	MCP6H04-E/SL	MCP6H04T-E/SL	TS924IDT	TS924IYDT	ALD4704SBL
Manufacturer	Texas Instruments	Texas Instruments	Microchip Technology	Microchip Technology	STMicroelectronics	STMicroelectronics	Advanced Linear Devices Inc.
Number of Circuits	4	4	4	4	4	4	4
Amplifier Type	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	CMOS
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Push-Pull, Rail-to-Rail
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Slew Rate (V/µs)	1.3	1.3	0.8	0.8	1.3	1.3	5
Gain Bandwidth Product (MHz)	1.5	1.5	1.2	1.2	4	4	2.1
Current - Input Bias	0.15 pA	0.15 pA	10 pA	10 pA	15 nA	15 nA	1 pA
Voltage - Input Offset (µV)	110	110	700	700	3000	3000	5000
Current - Supply	2.6 mA (x4)	2.6 mA (x4)	135 µA (x4)	135 µA (x4)	1 mA	1 mA	10 mA
Current - Output / Channel (mA)	30	30	50	50	80	80	15
Voltage - Supply Span (Min)	2.5 V	2.5 V	3.5 V	3.5 V	2.7 V	2.7 V	6.5 V
Voltage - Supply Span (Max)	15.5 V	15.5 V	16 V	16 V	12 V	12 V	12 V
Operating Temperature	-40 to 125°C (TJ)	-40 to 125°C (TJ)	-40 to 125°C (TA)	-40 to 125°C (TA)	-40 to 125°C	-40 to 125°C	0 to 70°C
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	—	—	AEC-Q100	AEC-Q100	—

Engineering Selection Recommendations

Direct Packaging Equivalent: LMC6494BEM/NOPB is the direct equivalent of the LMC6494BEM, differing only in packaging format (Tube versus standard packaging). This part maintains identical electrical specifications and is classified as obsolete. LMC6494BEM/NOPB offers improved RoHS3 compliance status, making it suitable for applications requiring regulatory alignment.

Active Product Substitutes with Matched Electrical Characteristics: The TS924IDT and TS924IYDT from STMicroelectronics provide active product status with compatible slew rate (1.3V/µs) and supply voltage range (2.7V to 12V minimum). Both parts carry AEC-Q100 automotive qualification and RoHS3 compliance. These devices feature higher gain bandwidth product (4 MHz) and output current capability (80 mA per channel), offering enhanced performance margins. The TS924 series is suitable for applications where extended product lifecycle and automotive-grade reliability are required.

Low-Power Alternative: The MCP6H04-E/SL and MCP6H04T-E/SL from Microchip Technology are active products with significantly reduced supply current (135 µA total versus 2.6 mA for the LMC6494BEM). These parts support the extended supply voltage range (3.5V to 16V) and maintain rail-to-rail output architecture. The MCP6H04T-E/SL variant is packaged in Tape & Reel format for high-volume production. These substitutes are appropriate for power-constrained applications where the lower slew rate (0.8V/µs) and gain bandwidth product (1.2 MHz) are acceptable.

High-Performance Alternative: The ALD4704SBL from Advanced Linear Devices Inc. offers the highest slew rate (5V/µs) and gain bandwidth product (2.1 MHz) among available substitutes. This part features push-pull output architecture and is active with RoHS3 compliance. However, the ALD4704SBL operates only to 70°C maximum junction temperature and requires a minimum supply voltage of 6.5V, restricting its use to applications within these thermal and voltage constraints.

Compliance Consideration: All active substitute parts listed carry RoHS3 compliance status, addressing regulatory requirements that the obsolete LMC6494BEM does not meet. Selection should prioritize active products for new designs and long-term production support.

Frequently Asked Questions (FAQ)

Q: Can the LMC6494BEM be directly replaced with LMC6494BEM/NOPB?

A: Yes. LMC6494BEM/NOPB is a direct equivalent with identical electrical specifications. The difference is packaging format (Tube packaging). Both are classified as obsolete products. LMC6494BEM/NOPB offers improved RoHS3 compliance.

Q: What is the primary difference between TS924IDT and TS924IYDT?

A: Both parts are electrically identical with the same specifications. The difference is in packaging format: TS924IDT uses Cut Tape (CT) & Digi-Reel® packaging, while TS924IYDT uses the same format. Both carry AEC-Q100 automotive qualification and are suitable for automotive applications.

Q: Can the MCP6H04 series be used in applications requiring the full 2.5V to 15.5V supply range?

A: The MCP6H04-E/SL and MCP6H04T-E/SL support a minimum supply voltage of 3.5V, which is higher than the LMC6494BEM minimum of 2.5V. These parts are not suitable for applications requiring operation below 3.5V supply voltage. Verify supply voltage requirements before substitution.

Q: Is the ALD4704SBL suitable for industrial temperature range applications?

A: No. The ALD4704SBL operates only to 70°C maximum junction temperature, which is below the industrial standard of 125°C. The LMC6494BEM, TS924 series, and MCP6H04 series all support -40°C to 125°C operating range. The ALD4704SBL is restricted to commercial temperature applications.

Q: What is the impact of higher slew rate in the TS924 series compared to the LMC6494BEM?

A: The TS924IDT and TS924IYDT feature a slew rate of 1.3V/µs, identical to the LMC6494BEM. The higher gain bandwidth product (4 MHz versus 1.5 MHz) provides improved frequency response. These characteristics are compatible with applications designed for the LMC6494BEM without circuit redesign.

Q: Are all substitute parts available in 14-SOIC package?

A: Yes. All substitute parts listed in this document are available in 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring direct PCB footprint compatibility with the LMC6494BEM.

Q: Which substitute offers the lowest power consumption?

A: The MCP6H04-E/SL and MCP6H04T-E/SL offer the lowest total supply current at 135 µA across four channels, compared to 2.6 mA for the LMC6494BEM. These parts are appropriate for battery-powered and low-power applications.

Q: Can the LMC6494BEM be substituted in new product designs?

A: No. The LMC6494BEM is classified as obsolete. For new designs, select from active products: TS924IDT, TS924IYDT, MCP6H04-E/SL, MCP6H04T-E/SL, or ALD4704SBL. All active substitutes carry RoHS3 compliance and offer extended product lifecycle support.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message