TS942ID Equivalent & Substitute Parts

Part Overview

The TS942ID is a general-purpose operational amplifier manufactured by STMicroelectronics, configured as a dual-circuit (2-channel) rail-to-rail output device in an 8-SOIC surface-mount package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available through standard distribution channels. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure production availability, and support ongoing system maintenance and repairs.

Key Parameters

Parameter	Value
Manufacturer Part Number	TS942ID
Manufacturer	STMicroelectronics
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	2
Output Type	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply Span (Min)	2.5 V
Voltage - Supply Span (Max)	10 V
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TS942ID is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 2 (dual-channel configuration)
Output Type: Rail-to-Rail
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Span (Min): 2.5 V or lower
Voltage - Supply Span (Max): 10 V or higher
Operating Temperature Range: -40°C ~ 85°C

Secondary Compatibility Factors:

RoHS3 Compliance
Moisture Sensitivity Level (MSL): 1
REACH Status: REACH Unaffected

Substitute parts are grouped into two categories based on amplifier type and performance characteristics:

Group 1: General Purpose Amplifiers (Direct Functional Equivalents) Parts that maintain identical amplifier type, circuit count, output configuration, and package specifications. These parts satisfy all primary substitution criteria and are suitable for direct replacement in applications where the TS942ID was originally specified.

Group 2: Buffer/Voltage Feedback Amplifiers (Extended Functionality) Parts that differ in amplifier type but maintain compatible package, mounting, and electrical operating parameters. These parts provide enhanced performance characteristics and are suitable for applications requiring higher bandwidth or output current capabilities.

Parameter Comparison

Parameter	TS942ID	LMC6442AIM/NOPB	LMC6442AIMX/NOPB	LMC6442IM/NOPB	LMC6442IMX/NOPB	MAX407CSA+	MAX407CSA+T	MAX407ESA+	MAX407ESA+T
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	National Semiconductor	Texas Instruments	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.5 V	1.8 V	1.8 V	1.8 V	1.8 V	2.5 V	2.5 V	2.5 V	2.5 V
Voltage - Supply Span (Max)	10 V	11 V	11 V	11 V	11 V	10 V	10 V	10 V	10 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Slew Rate	0.0045 V/µs	0.0041 V/µs	0.0041 V/µs	0.0041 V/µs	0.0041 V/µs	0.005 V/µs	0.005 V/µs	0.005 V/µs	0.005 V/µs
Gain Bandwidth Product	10 kHz	10.5 kHz	10.5 kHz	10.5 kHz	10.5 kHz	8 kHz	8 kHz	8 kHz	8 kHz
Current - Input Bias	1 pA	0.005 pA	0.005 pA	0.005 pA	0.005 pA	0.1 pA	0.1 pA	0.1 pA	0.1 pA
Voltage - Input Offset	10 mV	1.5 mV	1.5 mV	1.5 mV	1.5 mV	1 mV	1 mV	1 mV	1 mV
Current - Supply	1.2 µA (x2 Channels)	1.9 µA (x2 Channels)	1.9 µA (x2 Channels)	1.9 µA (x2 Channels)	1.9 µA (x2 Channels)	1 µA (x2 Channels)	1 µA (x2 Channels)	1 µA (x2 Channels)	1 µA (x2 Channels)
Current - Output / Channel	5 mA	2.1 mA	2.1 mA	2.1 mA	2.1 mA	600 µA	600 µA	600 µA	600 µA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Group 1: Direct Functional Equivalents (LMC6442 Series)

The LMC6442AIM/NOPB, LMC6442AIMX/NOPB, LMC6442IM/NOPB, and LMC6442IMX/NOPB parts are manufactured by Texas Instruments and National Semiconductor. These devices maintain identical functional specifications to the TS942ID: general-purpose dual-channel rail-to-rail amplifiers in 8-SOIC packages. All LMC6442 variants are classified as active products, ensuring long-term availability and supply chain stability.

The LMC6442 series demonstrates superior electrical performance compared to the TS942ID across multiple parameters: lower input bias current (0.005 pA versus 1 pA), reduced input offset voltage (1.5 mV versus 10 mV), and improved gain bandwidth product (10.5 kHz versus 10 kHz). The LMC6442 series supports an extended minimum supply voltage of 1.8 V, providing greater design flexibility for low-voltage applications, while maintaining the same maximum supply voltage of 11 V.

All LMC6442 variants are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the TS942ID. The LMC6442AIMX/NOPB variant offers the highest inventory availability (3210 units) in tape and reel packaging, suitable for high-volume production environments. The LMC6442IMX/NOPB variant provides the largest stock position (8003 units) and is also supplied in tape and reel format.

Group 2: Alternative General-Purpose Equivalents (MAX407 Series)

The MAX407CSA+, MAX407CSA+T, MAX407ESA+, and MAX407ESA+T parts are manufactured by Analog Devices Inc./Maxim Integrated. These devices are general-purpose dual-channel rail-to-rail amplifiers in 8-SOIC packages and are classified as active products.

The MAX407 series maintains identical package and mounting specifications to the TS942ID. However, the MAX407 series exhibits different electrical characteristics: lower input bias current (0.1 pA), reduced input offset voltage (1 mV), and lower gain bandwidth product (8 kHz). The MAX407 series supports the same supply voltage range as the TS942ID (2.5 V to 10 V minimum and maximum, respectively).

Temperature rating differences exist within the MAX407 series. The MAX407CSA+ and MAX407CSA+T variants operate over a reduced temperature range of 0°C to 70°C, limiting their suitability for applications requiring full -40°C to 85°C operation. The MAX407ESA+ and MAX407ESA+T variants support the full -40°C to 85°C operating temperature range, matching the TS942ID specification.

All MAX407 variants are ROHS3 compliant with MSL rating of 1 (Unlimited). The MAX407ESA+T variant in tape and reel packaging offers the highest inventory availability (3238 units) within the MAX407 series.

Selection Criteria by Application Requirements:

For applications requiring extended low-voltage operation below 2.5 V, the LMC6442 series is the appropriate selection due to its 1.8 V minimum supply voltage specification.

For applications operating within the 2.5 V to 10 V supply range with full -40°C to 85°C temperature requirements, both the LMC6442 series and the MAX407ESA+/MAX407ESA+T variants are suitable. The LMC6442 series provides superior input offset voltage performance (1.5 mV versus 1 mV) and higher output current capability (2.1 mA versus 600 µA per channel).

For applications with temperature requirements limited to 0°C to 70°C, the MAX407CSA+ and MAX407CSA+T variants are acceptable alternatives, though the LMC6442 and MAX407ESA+ series remain preferable due to their extended temperature range.

All substitute parts maintain ROHS3 compliance and MSL rating of 1, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q1: Can the LMC6442 series directly replace the TS942ID without circuit modifications?

A: The LMC6442 series maintains identical package, pinout, and functional specifications (dual-channel general-purpose rail-to-rail amplifier in 8-SOIC) as the TS942ID. Direct replacement is supported without circuit modifications. The LMC6442 series demonstrates improved electrical performance characteristics, including lower input offset voltage and input bias current, which are beneficial in most applications.

Q2: What is the primary difference between the LMC6442AIM/NOPB and LMC6442AIMX/NOPB variants?

A: The primary difference is packaging format. The LMC6442AIM/NOPB is supplied in tube packaging, while the LMC6442AIMX/NOPB is supplied in tape and reel (TR) format. Both variants are identical in electrical specifications and 8-SOIC package configuration. Tape and reel packaging is standard for automated assembly processes, while tube packaging is suitable for manual assembly or lower-volume applications.

Q3: Why do the MAX407CSA+ and MAX407CSA+T variants have a reduced operating temperature range?

A: The MAX407CSA+ and MAX407CSA+T variants are specified for 0°C to 70°C operation, which is a subset of the full -40°C to 85°C range supported by the MAX407ESA+ and MAX407ESA+T variants. This temperature derating reflects the specific characterization and qualification performed by the manufacturer for these part variants. Applications requiring full -40°C to 85°C operation must use the MAX407ESA+ or MAX407ESA+T variants.

Q4: Is the TS942ID still available for purchase?

A: The TS942ID is classified as obsolete, indicating that STMicroelectronics no longer manufactures this part through standard distribution channels. However, 1700 units are currently in stock as new original inventory. Once existing stock is depleted, the LMC6442 series or MAX407 series substitutes must be used for new designs or production runs.

Q5: What are the key electrical performance differences between the LMC6442 and MAX407 series?

A: The LMC6442 series provides higher output current capability (2.1 mA per channel versus 600 µA per channel) and higher gain bandwidth product (10.5 kHz versus 8 kHz). The MAX407 series provides lower input offset voltage (1 mV versus 1.5 mV) and lower input bias current (0.1 pA versus 0.005 pA). The LMC6442 series supports lower minimum supply voltage (1.8 V versus 2.5 V). Selection between these series depends on specific application requirements for output current, bandwidth, and supply voltage range.

Q6: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. The TS942ID is also ROHS3 compliant. This ensures compatibility with environmental regulations and modern manufacturing standards across all substitute options.

Q7: What is the significance of MSL rating 1 (Unlimited)?

A: Moisture Sensitivity Level (MSL) rating of 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture-control handling during storage or transport. This is the most favorable MSL rating and simplifies inventory management and logistics. All listed parts, including the TS942ID and all substitutes, carry this rating.

Q8: Can the MAX4217ESA+ or MAX4217ESA+T be used as substitutes for the TS942ID?

A: The MAX4217ESA+ and MAX4217ESA+T are buffer/voltage feedback amplifiers with significantly different electrical characteristics compared to the TS942ID. While they share the same 8-SOIC package and rail-to-rail output configuration, they are not direct functional equivalents. The MAX4217 series exhibits much higher slew rate (600 V/µs versus 0.0045 V/µs), higher bandwidth (230 MHz versus 10 kHz), and higher output current (120 mA versus 5 mA). These parts are suitable only for applications requiring high-speed buffering or high-current output, not for general-purpose amplification at the TS942ID's performance level.

Q9: What packaging options are available for the substitute parts?

A: Substitute parts are available in multiple packaging formats: tube packaging (suitable for manual assembly and lower-volume applications), tape and reel (TR) format (standard for automated assembly and high-volume production), and bulk packaging. The specific packaging format should be selected based on manufacturing process requirements and production volume. Tape and reel variants typically offer higher inventory availability and are preferred for production environments.

Q10: Are there any supply voltage compatibility concerns when substituting the TS942ID?

A: The LMC6442 series supports a wider supply voltage range (1.8 V to 11 V) compared to the TS942ID (2.5 V to 10 V). This extended range provides greater design flexibility and is fully backward compatible with applications designed for the TS942ID's supply voltage range. The MAX407 series maintains the same supply voltage range as the TS942ID (2.5 V to 10 V), ensuring direct compatibility. No supply voltage modifications are required when substituting either series.

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