TSX632IST Equivalent & Substitute Parts

Part Overview

The TSX632IST is a CMOS dual-channel operational amplifier manufactured by STMicroelectronics, designed for rail-to-rail signal conditioning applications. This surface-mount linear amplifier operates across a wide supply voltage range of 3.3 V to 16 V and maintains performance across industrial temperature ranges from -40°C to 125°C. The device is currently in active production status with 2200 units available in inventory.

Substitute parts are necessary when the TSX632IST becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from multiple qualified manufacturers offering equivalent functional performance within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	0.12	V/µs
Gain Bandwidth Product	200	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	1.6	mV
Current - Supply	45	µA
Current - Output / Channel	92	mA
Voltage - Supply Span (Min)	3.3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the TSX632IST is determined by the following critical parameters:

Primary Substitution Criteria:

Dual-channel configuration (2 circuits)
Rail-to-rail output capability
CMOS amplifier topology
Surface-mount packaging in 8-pin format
Supply voltage range compatibility (minimum 3.3 V, maximum 16 V)
Operating temperature range of -40°C to 125°C
RoHS3 compliance and MSL Level 1 rating

Secondary Compatibility Factors:

Slew rate and gain-bandwidth product performance envelope
Input bias current and input offset voltage specifications
Output current capability per channel
Supply current consumption

Substitute parts are grouped into two categories based on amplifier type classification:

Category 1: CMOS Amplifiers — Direct functional equivalents maintaining CMOS topology with comparable electrical characteristics. Parts LMC6482IMM/NOPB and LMC6482IMMX/NOPB fall within this category.

Category 2: General Purpose Amplifiers — Functionally compatible alternatives with enhanced performance specifications but different amplifier topology. Parts AD8566ARMZ-REEL and TLC2252AIPWR fall within this category.

Parameter Comparison

Parameter	TSX632IST	AD8566ARMZ-REEL	LMC6482IMM/NOPB	LMC6482IMMX/NOPB	TLC2252AIPW	TLC2252AIPWR
Manufacturer	STMicroelectronics	Analog Devices Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	CMOS	General Purpose	CMOS	CMOS	General Purpose	General Purpose
Number of Circuits	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
Slew Rate (V/µs)	0.12	6	1.3	1.3	0.12	0.12
Gain Bandwidth Product (kHz)	200	5000	1500	1500	210	210
Current - Input Bias (pA)	1	80 nA	0.02	0.02	1	1
Voltage - Input Offset (mV)	1.6	2	0.00011	0.00011	0.2	0.2
Current - Supply (µA)	45	700 (x2)	1300 (x2)	1300 (x2)	80 (x2)	80 (x2)
Current - Output / Channel (mA)	92	35	30	30	50	50
Voltage - Supply Span (Min)	3.3 V	4.5 V	3 V	3 V	4.4 V	4.4 V
Voltage - Supply Span (Max)	16 V	16 V	15.5 V	15.5 V	16 V	16 V
Operating Temperature	-40 to 125°C	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 125°C	-40 to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP	8-TSSOP
Product Status	Active	Active	Last Time Buy	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Recommended Primary Substitutes:

TLC2252AIPWR — This Texas Instruments general-purpose amplifier is the preferred substitute for new designs and ongoing production. It maintains identical slew rate (0.12 V/µs) and gain-bandwidth product (210 kHz) specifications to the TSX632IST, operates across the full -40°C to 125°C temperature range, and carries active product status with 4140 units in inventory. RoHS3 compliance and MSL Level 1 rating are confirmed. The 8-TSSOP package is pin-compatible with the TSX632IST.

LMC6482IMMX/NOPB — This Texas Instruments CMOS amplifier provides direct topology equivalence and is actively produced with 28300 units available. It maintains CMOS architecture, dual-channel configuration, and rail-to-rail output. The device operates from 3 V minimum supply voltage, providing enhanced low-voltage capability. Operating temperature range is limited to -40°C to 85°C, which restricts use in applications requiring the full 125°C upper limit. The 8-VSSOP package requires PCB layout verification for compatibility.

Secondary Substitutes:

AD8566ARMZ-REEL — Analog Devices general-purpose amplifier offering enhanced performance with 6 V/µs slew rate and 5 MHz gain-bandwidth product. Supply voltage minimum is 4.5 V, which exceeds the TSX632IST specification of 3.3 V. Operating temperature range is -40°C to 85°C. This device is suitable for applications where higher bandwidth performance is acceptable and supply voltage constraints are not limiting. 15300 units are in inventory.

LMC6482IMM/NOPB — Texas Instruments CMOS amplifier with specifications identical to LMC6482IMMX/NOPB. Product status is Last Time Buy, indicating this device is approaching end-of-life. New designs should not select this part; existing designs may continue procurement during the Last Time Buy window.

TLC2252AIPW — Texas Instruments general-purpose amplifier with matching electrical characteristics to TLC2252AIPWR. Product status is Obsolete, making this device unsuitable for new designs or long-term production commitments. Existing inventory of 3500 units may be available for legacy system support only.

Frequently Asked Questions (FAQ)

Q: Can the AD8566ARMZ-REEL replace the TSX632IST in all applications?

A: The AD8566ARMZ-REEL is functionally compatible for most applications but has two limiting factors. The minimum supply voltage is 4.5 V compared to the TSX632IST specification of 3.3 V, which restricts use in low-voltage designs. The operating temperature range extends only to 85°C, not 125°C, which excludes high-temperature applications. Verify supply voltage and temperature requirements before selection.

Q: What is the difference between the LMC6482IMM/NOPB and LMC6482IMMX/NOPB?

A: Both devices are electrically identical CMOS amplifiers with matching electrical specifications. The primary difference is product status: LMC6482IMM/NOPB is Last Time Buy (approaching end-of-life), while LMC6482IMMX/NOPB is Active (ongoing production). For new designs, select LMC6482IMMX/NOPB. For legacy system support, either part is acceptable during the Last Time Buy period.

Q: Are the TLC2252AIPW and TLC2252AIPWR interchangeable?

A: Both devices have identical electrical specifications and are pin-compatible. The primary difference is product status: TLC2252AIPW is Obsolete, while TLC2252AIPWR is Active. For new designs and ongoing production, use TLC2252AIPWR exclusively. The Obsolete status of TLC2252AIPW indicates limited future availability.

Q: What packaging considerations apply when substituting the TSX632IST?

A: The TSX632IST is specified in 8-TSSOP and 8-MSOP packages (0.118", 3.00mm width). TLC2252AIPW and TLC2252AIPWR use 8-TSSOP (0.173", 4.40mm width), which is physically larger but maintains pin compatibility. The LMC6482 series uses 8-VSSOP packaging, which differs from the TSX632IST package footprint and requires PCB layout verification. AD8566ARMZ-REEL uses 8-MSOP packaging, which is compatible with the TSX632IST footprint. Verify PCB layout compatibility before final part selection.

Q: Why does the TSX632IST have higher output current capability (92 mA) than most substitutes?

A: The TSX632IST output current specification of 92 mA per channel is a defined electrical characteristic of this device. Substitute parts offer lower output current ratings: AD8566ARMZ-REEL (35 mA), LMC6482 series (30 mA), and TLC2252 series (50 mA). Applications requiring output current exceeding 50 mA must retain the TSX632IST or implement external buffering stages with substitute devices.

Q: Can I use the LMC6482 series in applications requiring -40°C to 125°C operation?

A: No. The LMC6482IMM/NOPB and LMC6482IMMX/NOPB are specified for -40°C to 85°C operation only. Applications requiring the full -40°C to 125°C temperature range must use the TSX632IST, TLC2252AIPW, or TLC2252AIPWR. Verify application temperature requirements before part selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the TSX632IST environmental compliance status. All parts are suitable for lead-free manufacturing processes.

Q: What is the significance of the Gain Bandwidth Product difference between the TSX632IST (200 kHz) and AD8566ARMZ-REEL (5 MHz)?

A: The gain-bandwidth product defines the frequency response envelope of the amplifier. The TSX632IST is optimized for low-frequency, low-power applications with 200 kHz bandwidth. The AD8566ARMZ-REEL provides 25 times greater bandwidth (5 MHz), making it suitable for higher-frequency signal conditioning. Select based on application bandwidth requirements; higher bandwidth devices consume more power and may introduce noise in low-frequency applications.

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