TS914AIN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS914AIN is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit rail-to-rail operational amplifier in a 14-DIP package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement requirements. The TS914AIN operates across a wide supply voltage range of 2.7 V to 16 V and is qualified to AEC-Q100 automotive standards with ROHS3 compliance.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TS914AIN	—
Manufacturer	STMicroelectronics	—
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Package / Case	14-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	16	V
Operating Temperature Range	-40 to 125	°C
Product Status	Obsolete	—
Grade	Automotive	—
Qualification	AEC-Q100	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TS914AIN is determined by the following critical parameters that must align across candidate parts:

Primary Substitution Criteria:

Amplifier Type: CMOS
Number of Circuits: 4
Output Type: Rail-to-Rail
Package / Case: 14-DIP (0.300", 7.62mm)
Mounting Type: Through Hole
Voltage Supply Compatibility: Minimum 2.7 V to 16 V operating range

Secondary Compatibility Factors:

Operating Temperature Range: -40°C minimum to 85°C or higher maximum
RoHS3 Compliance
REACH Unaffected Status
Electrical performance parameters: Slew Rate, Gain Bandwidth Product, Input Bias Current, Input Offset Voltage, Supply Current, and Output Current per Channel

The substitute parts identified—LMC6484AIN/NOPB, LMC6484IN/NOPB, and LMC660AIN/NOPB—satisfy the primary substitution criteria of CMOS 4-circuit rail-to-rail amplifiers in 14-DIP through-hole packages. All candidates maintain ROHS3 compliance and REACH unaffected status.

Parameter Comparison

Parameter	TS914AIN (Main)	LMC6484AIN/NOPB	LMC6484IN/NOPB	LMC660AIN/NOPB
Manufacturer	STMicroelectronics	National Semiconductor	Texas Instruments	Texas Instruments
Amplifier Type	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Push-Pull, Rail-to-Rail
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Slew Rate	1.0	1.3	1.3	1.1
Slew Rate Unit	V/µs	V/µs	V/µs	V/µs
Gain Bandwidth Product	1.4	1.5	1.5	1.4
Gain Bandwidth Product Unit	MHz	MHz	MHz	MHz
Current - Input Bias	1	0.02	0.02	0.002
Current - Input Bias Unit	pA	pA	pA	pA
Voltage - Input Offset	5	110	110	1
Voltage - Input Offset Unit	mV	µV	µV	mV
Current - Supply	230	2.6 (x4 Channels)	2.6 (x4 Channels)	1.5 (x4 Channels)
Current - Supply Unit	µA	mA	mA	mA
Current - Output / Channel	60	30	30	40
Current - Output / Channel Unit	mA	mA	mA	mA
Voltage - Supply Span (Min)	2.7	3	3	4.75
Voltage - Supply Span (Min) Unit	V	V	V	V
Voltage - Supply Span (Max)	16	15.5	15.5	15.5
Voltage - Supply Span (Max) Unit	V	V	V	V
Operating Temperature (Min)	-40	-40	-40	-40
Operating Temperature (Min) Unit	°C	°C	°C	°C
Operating Temperature (Max)	125	85	85	85
Operating Temperature (Max) Unit	°C	°C	°C	°C
Product Status	Obsolete	Active	Active	Last Time Buy
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

LMC6484AIN/NOPB (National Semiconductor)

This substitute maintains active product status and provides electrical performance improvements over the obsolete TS914AIN. The LMC6484AIN/NOPB offers reduced input bias current (0.02 pA versus 1 pA) and improved slew rate (1.3 V/µs versus 1.0 V/µs). The minimum supply voltage increases from 2.7 V to 3 V, and the maximum operating temperature decreases from 125°C to 85°C. This part is suitable for applications where the reduced supply voltage range and lower temperature maximum are acceptable. ROHS3 compliance and REACH unaffected status are maintained.

LMC6484IN/NOPB (Texas Instruments)

This substitute is functionally equivalent to the LMC6484AIN/NOPB with identical electrical specifications. The LMC6484IN/NOPB is supplied in tube packaging and maintains active product status. It provides the same performance improvements as the LMC6484AIN/NOPB variant. ROHS3 compliance and REACH unaffected status are maintained. Higher inventory availability (4206 pieces) supports procurement continuity.

LMC660AIN/NOPB (Texas Instruments)

This substitute offers the most significant performance improvements, including the lowest input bias current (0.002 pA) and lowest supply current (1.5 mA across 4 channels). The LMC660AIN/NOPB features push-pull output configuration in addition to rail-to-rail operation. The product status is Last Time Buy, indicating limited future availability. The minimum supply voltage is 4.75 V, representing the most restrictive lower bound among all candidates. Operating temperature maximum is 85°C. ROHS3 compliance and REACH unaffected status are maintained.

Compliance and Regulatory Considerations

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original TS914AIN. The TS914AIN's automotive grade and AEC-Q100 qualification are not explicitly stated for the substitute parts in the provided data; however, all candidates are CMOS 4-circuit rail-to-rail amplifiers in identical 14-DIP packages with compatible electrical characteristics.

Frequently Asked Questions (FAQ)

Q: Can the LMC6484AIN/NOPB directly replace the TS914AIN in all applications?

A: The LMC6484AIN/NOPB is a functional substitute for the TS914AIN in applications where the supply voltage range of 3 V to 15.5 V and operating temperature range of -40°C to 85°C are acceptable. The TS914AIN supports 2.7 V minimum supply voltage and 125°C maximum operating temperature, which are not matched by the LMC6484AIN/NOPB. Applications requiring these extended specifications require evaluation of alternative candidates or design modification.

Q: What is the difference between LMC6484AIN/NOPB and LMC6484IN/NOPB?

A: The LMC6484AIN/NOPB and LMC6484IN/NOPB are electrically identical CMOS 4-circuit rail-to-rail amplifiers manufactured by National Semiconductor and Texas Instruments respectively. Both are supplied in 14-DIP packages. The primary difference is packaging format (tube for LMC6484IN/NOPB) and manufacturer. Both maintain active product status and ROHS3 compliance.

Q: Why does the LMC660AIN/NOPB have Last Time Buy status?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for this product. While the LMC660AIN/NOPB offers superior electrical performance characteristics (lowest input bias current and supply current), procurement should prioritize active-status alternatives such as LMC6484AIN/NOPB or LMC6484IN/NOPB for long-term design support.

Q: Are there supply voltage compatibility issues with these substitutes?

A: Yes. The TS914AIN operates at 2.7 V minimum supply voltage. The LMC6484AIN/NOPB and LMC6484IN/NOPB require 3 V minimum, and the LMC660AIN/NOPB requires 4.75 V minimum. Applications operating at 2.7 V to 3 V supply voltage cannot use any of these substitutes without circuit redesign.

Q: What is the significance of the push-pull output configuration in the LMC660AIN/NOPB?

A: The LMC660AIN/NOPB features push-pull output in addition to rail-to-rail operation, providing enhanced output drive capability. This configuration differs from the standard rail-to-rail output of the TS914AIN and other LMC6484 variants. Applications requiring specific output impedance or drive characteristics must evaluate this difference.

Q: Are all substitute parts suitable for automotive applications?

A: The provided data does not explicitly state automotive qualification or AEC-Q100 certification for the substitute parts. The TS914AIN is specified as automotive grade with AEC-Q100 qualification. Applications requiring automotive qualification must verify this requirement with the substitute part manufacturers or select alternatives with documented automotive certification.

Q: What is the impact of the reduced maximum operating temperature on the LMC6484 and LMC660 variants?

A: The TS914AIN operates to 125°C maximum junction temperature, while all substitute parts operate to 85°C maximum. Applications requiring operation above 85°C cannot use these substitutes. Thermal design and ambient temperature specifications must be evaluated to determine compatibility.

Q: How do the electrical performance characteristics compare across all candidates?

A: The LMC660AIN/NOPB provides the best electrical performance with the lowest input bias current (0.002 pA), lowest input offset voltage (1 mV), and lowest supply current (1.5 mA across 4 channels). The LMC6484 variants offer intermediate performance with 0.02 pA input bias current and 2.6 mA supply current. The TS914AIN has higher input bias current (1 pA) and higher supply current (230 µA). Selection depends on application requirements for precision, power consumption, and noise performance.

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