TS914IN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS914IN is a CMOS operational amplifier manufactured by STMicroelectronics, configured as a 4-circuit rail-to-rail amplifier in a 14-DIP package. This device is classified as obsolete, indicating discontinued production and limited availability through standard distribution channels. The TS914IN is qualified to AEC-Q100 automotive standards and operates across a wide supply voltage range of 2.7 V to 16 V with an operating temperature range of -40°C to 125°C. Identification of equivalent substitute parts is necessary due to the obsolete product status and potential supply constraints for new applications or replacement requirements.

Substiute Parts

TS914IN

STMicroelectronicsIn Stock: 1479TS914IN Datasheet

Current PartRFQ

LMC660CN/NOPB

National SemiconductorIn Stock: 1444LMC660CN/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TS914IN is determined by alignment of core electrical and mechanical parameters. The primary substitution criteria are:

Functional Equivalence Parameters:

• Amplifier Type: CMOS technology
• Number of Circuits: 4 independent amplifier circuits
• Output Type: Rail-to-Rail output capability
• Gain Bandwidth Product: 1.4 MHz
• Package / Case: 14-DIP form factor with 0.300" (7.62mm) pitch
• Mounting Type: Through Hole

Operational Compatibility Parameters:

• Supply voltage range overlap
• Operating temperature range coverage
• Input bias current and input offset voltage characteristics
• Output current capability per channel
• Slew rate performance

The LMC660CN/NOPB from National Semiconductor meets the functional equivalence criteria through identical circuit count, package form factor, and core CMOS amplifier architecture. Both devices share the same 14-DIP through-hole package and deliver 1.4 MHz gain bandwidth product performance.

Parameter Comparison

Engineering Selection Recommendations

TS914IN Continuation: The TS914IN remains the specified component for applications requiring automotive-grade qualification (AEC-Q100), extended operating temperature range (-40°C to 125°C), and wide supply voltage operation (2.7 V to 16 V). Current inventory of 1405 pieces supports ongoing production requirements. This device is suitable for established designs where the obsolete status does not impact supply continuity.

LMC660CN/NOPB Substitution: The LMC660CN/NOPB is an active-status alternative for new designs or applications where automotive qualification is not mandatory. This substitute provides superior input bias current (0.002 pA versus 1 pA) and reduced input offset voltage (1 mV versus 10 mV), resulting in improved precision characteristics. The LMC660CN/NOPB delivers higher slew rate performance (1.1 V/µs versus 1 V/µs) and operates with reduced supply current per channel.

Substitution Constraints: The LMC660CN/NOPB operates within a narrower supply voltage range (4.75 V to 15.5 V minimum versus 2.7 V minimum for TS914IN) and restricted operating temperature range (0°C to 70°C versus -40°C to 125°C). The LMC660CN/NOPB is RoHS non-compliant, whereas the TS914IN meets ROHS3 compliance. Output current per channel is reduced to 40 mA compared to 60 mA on the TS914IN. These differences require circuit-level evaluation for compatibility in specific applications.

Frequently Asked Questions (FAQ)

Q: Can the LMC660CN/NOPB directly replace the TS914IN in existing designs?

A: Direct replacement requires verification of three critical parameters: (1) supply voltage range—the LMC660CN/NOPB minimum supply is 4.75 V, whereas TS914IN operates from 2.7 V; (2) operating temperature range—LMC660CN/NOPB is limited to 0°C to 70°C versus TS914IN's -40°C to 125°C; (3) output current per channel—LMC660CN/NOPB provides 40 mA versus TS914IN's 60 mA. Substitution is valid only when the application operates within these LMC660CN/NOPB specifications.

Q: What are the key electrical differences between these devices?

A: The LMC660CN/NOPB exhibits superior precision characteristics with input bias current of 0.002 pA (versus 1 pA) and input offset voltage of 1 mV (versus 10 mV). Slew rate is marginally higher at 1.1 V/µs. Supply current per channel is significantly lower in the LMC660CN/NOPB. Both devices share identical gain bandwidth product (1.4 MHz) and package form factor.

Q: Are both devices pin-compatible?

A: Both the TS914IN and LMC660CN/NOPB use the 14-DIP package with 0.300" (7.62mm) pitch. Pin compatibility for through-hole mounting is confirmed. However, electrical parameter differences require circuit validation before substitution.

Q: What compliance differences exist between these parts?

A: The TS914IN is AEC-Q100 qualified for automotive applications and ROHS3 compliant. The LMC660CN/NOPB is RoHS non-compliant and does not carry automotive qualification. Applications requiring automotive-grade components must retain the TS914IN.

Q: Why is the TS914IN classified as obsolete?

A: Obsolete status indicates discontinued production by STMicroelectronics. Current inventory availability (1405 pieces) supports existing applications. New designs should evaluate active alternatives such as the LMC660CN/NOPB or other current-production CMOS amplifiers meeting the required specifications.

Q: What is the impact of the narrower supply voltage range on the LMC660CN/NOPB?

A: The LMC660CN/NOPB minimum supply voltage of 4.75 V eliminates compatibility with applications operating below this threshold. The TS914IN's 2.7 V minimum enables operation in low-voltage systems. This difference is critical for battery-powered or low-supply-voltage applications.

Q: How do the input offset voltage specifications affect circuit design?

A: The TS914IN specifies 10 mV input offset voltage, while the LMC660CN/NOPB specifies 1 mV. Applications requiring precision signal conditioning benefit from the LMC660CN/NOPB's lower offset voltage. High-gain amplifier configurations or precision measurement circuits may require offset nulling with the TS914IN but operate within specification with the LMC660CN/NOPB.