TSV622ILT Equivalent & Substitute Parts

Part Overview

The TSV622ILT is a CMOS operational amplifier manufactured by STMicroelectronics, featuring dual-channel rail-to-rail output configuration in a SOT-23-8 surface mount package. This device is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. The TSV622ILT operates across a 1.5V to 5.5V supply range with a 420 kHz gain bandwidth product and is suitable for low-power general-purpose amplification applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Gain Bandwidth Product	420	kHz
Slew Rate	0.14	V/µs
Voltage - Input Offset	4	mV
Current - Input Bias	1	pA
Current - Supply	29	µA
Current - Output / Channel	74	mA
Voltage - Supply Span (Min)	1.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	SOT-23-8	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the TSV622ILT is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Dual-channel (2 circuit) configuration
Rail-to-rail output capability
Supply voltage range compatibility (minimum 1.5V, maximum 5.5V)
Operating temperature range coverage (-40°C to 125°C minimum)
Surface mount packaging in SOT-23-8 or equivalent footprint

Mechanical Compatibility Criteria:

Package / Case designation: SOT-23-8 or functionally equivalent 8-pin surface mount packages
Pin-compatible footprint for direct board-level substitution

Substitute parts are grouped into two categories based on these criteria: Direct Package Equivalents (identical SOT-23-8 footprint) and Functional Equivalents (alternative 8-pin surface mount packages with compatible pinout).

Parameter Comparison

Parameter	TSV622ILT	TSV622IST	MAX4402AKA+T	OPA2349EA/3K
Manufacturer	STMicroelectronics	STMicroelectronics	Analog Devices Inc./Maxim Integrated	Texas Instruments
Product Status	Obsolete	Active	Active	Active
Amplifier Type	CMOS	CMOS	General Purpose	CMOS
Number of Circuits	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Gain Bandwidth Product	420 kHz	420 kHz	800 kHz	70 kHz
Slew Rate	0.14 V/µs	0.14 V/µs	1 V/µs	0.02 V/µs
Voltage - Input Offset	4 mV	4 mV	1 mV	2 mV
Current - Input Bias	1 pA	1 pA	0.1 pA	0.5 pA
Current - Supply	29 µA	29 µA	410 µA (x2 Channels)	1 µA (x2 Channels)
Current - Output / Channel	74 mA	74 mA	30 mA	8 mA
Voltage - Supply Span (Min)	1.5 V	1.5 V	2.5 V	1.8 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V	5.5 V
Operating Temperature	-40 to 125 °C	-40 to 125 °C	-40 to 125 °C	-55 to 85 °C
Package / Case	SOT-23-8	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	SOT-23-8	SOT-23-8
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)

Engineering Selection Recommendations

TSV622IST (STMicroelectronics)

The TSV622IST is the primary substitute for the obsolete TSV622ILT. This device maintains identical electrical specifications across all critical parameters: 420 kHz gain bandwidth product, 0.14 V/µs slew rate, 29 µA supply current, and 74 mA output current per channel. The TSV622IST operates across the same 1.5V to 5.5V supply range and -40°C to 125°C temperature range. The primary distinction is packaging: TSV622IST is supplied in 8-MiniSO (8-TSSOP/8-MSOP) format with 0.118" width, requiring PCB layout modification from the original SOT-23-8 footprint. Product status is Active with 21,100 units in stock. RoHS3 compliance and MSL 1 rating are maintained.

MAX4402AKA+T (Analog Devices Inc./Maxim Integrated)

The MAX4402AKA+T provides direct SOT-23-8 package compatibility with the TSV622ILT, eliminating PCB redesign requirements. This device maintains dual-channel, rail-to-rail configuration with identical -40°C to 125°C operating temperature range and 5.5V maximum supply voltage. However, electrical performance differs significantly: the MAX4402AKA+T features 800 kHz gain bandwidth product (1.9× higher), 1 V/µs slew rate (7.1× higher), and 410 µA supply current (14.1× higher). Input offset voltage is 1 mV (improved), and output current per channel is 30 mA (reduced). Minimum supply voltage is 2.5V, restricting operation below this threshold. Product status is Active with 4,445 units in stock. RoHS3 compliance and MSL 1 rating apply.

OPA2349EA/3K (Texas Instruments)

The OPA2349EA/3K offers SOT-23-8 package compatibility and operates across a 1.8V to 5.5V supply range. This CMOS device provides the lowest supply current consumption at 1 µA (x2 Channels), representing 97% reduction compared to the TSV622ILT. However, electrical performance is substantially reduced: 70 kHz gain bandwidth product (83% lower), 0.02 V/µs slew rate (86% lower), and 8 mA output current per channel (89% lower). Operating temperature range is -55°C to 85°C, providing lower temperature coverage but restricted upper temperature limit. Moisture sensitivity level is MSL 2 (1 Year), requiring controlled storage conditions. Product status is Active with 6,400 units in stock. RoHS3 compliance applies.

Frequently Asked Questions (FAQ)

Q: Can the TSV622IST directly replace the TSV622ILT on existing PCBs?

A: Electrical substitution is complete; however, mechanical substitution requires PCB layout modification. The TSV622IST uses 8-MiniSO (8-TSSOP/8-MSOP) packaging with 0.118" width, whereas the TSV622ILT uses SOT-23-8. Pin assignments are compatible, but footprint dimensions differ, necessitating PCB redesign or adapter solutions.

Q: Which substitute maintains the closest electrical performance to the TSV622ILT?

A: The TSV622IST is electrically identical to the TSV622ILT across all specified parameters: 420 kHz gain bandwidth product, 0.14 V/µs slew rate, 29 µA supply current, 74 mA output current per channel, and identical supply voltage and temperature ranges.

Q: Is the MAX4402AKA+T suitable for applications requiring low supply voltage operation below 2.5V?

A: No. The MAX4402AKA+T specifies a minimum supply voltage of 2.5V, whereas the TSV622ILT operates from 1.5V. Applications requiring operation below 2.5V require the TSV622IST or OPA2349EA/3K.

Q: What are the implications of selecting the OPA2349EA/3K for high-frequency applications?

A: The OPA2349EA/3K is unsuitable for high-frequency applications. Its 70 kHz gain bandwidth product represents an 83% reduction compared to the TSV622ILT's 420 kHz specification. Slew rate is reduced to 0.02 V/µs (86% lower), and output current per channel is limited to 8 mA (89% lower). This device is optimized for ultra-low-power applications, not bandwidth-critical designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts—TSV622IST, MAX4402AKA+T, and OPA2349EA/3K—are RoHS3 compliant. The TSV622ILT is also RoHS3 compliant.

Q: What is the moisture sensitivity level difference between substitutes?

A: The TSV622IST and MAX4402AKA+T both carry MSL 1 (Unlimited), identical to the TSV622ILT. The OPA2349EA/3K carries MSL 2 (1 Year), requiring controlled storage and handling within one year of manufacture.

Q: Can the MAX4402AKA+T be used in applications requiring the full -40°C to 125°C temperature range?

A: Yes. The MAX4402AKA+T operates across -40°C to 125°C, matching the TSV622ILT's temperature specification. However, the OPA2349EA/3K is limited to -55°C to 85°C, restricting its use in applications requiring operation above 85°C.

Q: What is the primary advantage of the OPA2349EA/3K over other substitutes?

A: The OPA2349EA/3K provides the lowest supply current consumption at 1 µA (x2 Channels), representing a 97% reduction compared to the TSV622ILT's 29 µA specification. This device is optimized for battery-powered and ultra-low-power applications where supply current minimization is the primary design constraint.

Q: Are pin assignments identical across all substitute parts?

A: Pin assignments are compatible across all substitutes for dual-channel rail-to-rail operation in 8-pin packages. However, package footprints differ: TSV622IST uses 8-MiniSO, while MAX4402AKA+T and OPA2349EA/3K use SOT-23-8. Verify pinout documentation for specific applications.

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