TSV621ICT Equivalent & Substitute Parts

Part Overview

The TSV621ICT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in a 5-TSSOP (SC-70-5) surface-mount package. This device features rail-to-rail output capability and operates across a supply voltage range of 1.5 V to 5.5 V, making it suitable for low-power analog signal processing applications. The TSV621ICT is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing circuit designs while meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	TSV621ICT Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Package / Case	5-TSSOP, SC-70-5, SOT-353	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	1.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40°C ~ 125°C	—
Slew Rate	0.14	V/µs
Gain Bandwidth Product	420	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	4	mV
Current - Supply	29	µA
Current - Output / Channel	74	mA
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TSV621ICT is determined by strict adherence to the following mandatory parameters:

Package Compatibility: All substitute parts must use the 5-TSSOP, SC-70-5, or SOT-353 package to ensure mechanical and electrical compatibility with existing PCB layouts and solder reflow processes.

Electrical Interface: Substitute parts must support rail-to-rail output operation and single-circuit configuration to maintain functional equivalence in signal processing applications.

Supply Voltage Range: The substitute must operate within the minimum supply voltage of 1.5 V and maximum supply voltage of 5.5 V. Parts with narrower supply ranges (such as 1.8 V minimum) remain compatible if the application operates within their specified range.

Operating Temperature: The substitute must support the full industrial temperature range of -40°C to 125°C, or a subset thereof that encompasses the application's operating conditions.

Compliance Standards: All substitute parts must maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating to ensure regulatory and manufacturing process compatibility.

Performance Parameters: While slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current vary among substitutes, these parameters determine application suitability rather than substitution eligibility. Selection depends on circuit requirements rather than direct equivalence.

Parameter Comparison

Parameter	TSV621ICT	ADA4051-1AKSZ-R7	ISL28113FEZ-T7A	ISL28114FEZ-T7A	LMV301MG/NOPB	LMV301MGX/NOPB	LMV931SQ3T2G	MCP6241UT-E/LT	OPA349SA/250
Manufacturer	STMicroelectronics	Analog Devices Inc.	Renesas Electronics	Renesas Electronics	Texas Instruments	Texas Instruments	onsemi	Microchip Technology	Texas Instruments
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	Zero-Drift	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Package / Case	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353	5-TSSOP, SC-70-5, SOT-353
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
Voltage - Supply Span (Min)	1.5 V	1.8 V	1.8 V	1.8 V	1.8 V	1.8 V	1.8 V	1.8 V	1.8 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V	5.5 V	5 V	5 V	5.5 V	5.5 V	5.5 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C
Slew Rate (V/µs)	0.14	0.06	1	2.5	0.66	0.66	0.48	0.3	0.02
Gain Bandwidth Product (kHz)	420	125	2000	5000	1000	1000	1500	550	70
Current - Input Bias (pA)	1	20	3	3	0.182	0.182	1000	1	0.5
Voltage - Input Offset (mV)	4	0.002	0.5	0.5	0.9	0.9	1	5	2
Current - Supply (µA)	29	15	90	300	163	163	116	50	1
Current - Output / Channel (mA)	74	15	22	31	108	108	100	23	8
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain active product status with major semiconductor manufacturers, ensuring long-term availability and supply chain stability. Each substitute is ROHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating, meeting regulatory requirements and manufacturing process compatibility with the original TSV621ICT.

For applications requiring extended temperature operation (-40°C to 125°C): ISL28113FEZ-T7A, ISL28114FEZ-T7A, LMV931SQ3T2G, and MCP6241UT-E/LT maintain the full industrial temperature range. LMV301MG/NOPB and LMV301MGX/NOPB operate only to 85°C, and OPA349SA/250 operates only to 70°C, limiting their use in high-temperature environments.

For applications with 1.5 V minimum supply voltage requirement: The TSV621ICT operates at 1.5 V minimum. All substitute parts listed operate at 1.8 V minimum, requiring verification that the application can tolerate this higher minimum supply voltage threshold.

For applications requiring maximum supply voltage of 5.5 V: ADA4051-1AKSZ-R7, ISL28113FEZ-T7A, ISL28114FEZ-T7A, LMV931SQ3T2G, MCP6241UT-E/LT, and OPA349SA/250 support 5.5 V maximum. LMV301MG/NOPB and LMV301MGX/NOPB support only 5 V maximum.

For low-power applications: OPA349SA/250 consumes only 1 µA supply current, significantly lower than the TSV621ICT at 29 µA. ADA4051-1AKSZ-R7 consumes 15 µA. MCP6241UT-E/LT consumes 50 µA. These options are suitable for battery-powered or ultra-low-power designs.

For high-speed applications: ISL28114FEZ-T7A offers 5 MHz gain bandwidth product and 2.5 V/µs slew rate. ISL28113FEZ-T7A offers 2 MHz gain bandwidth product and 1 V/µs slew rate. These exceed the TSV621ICT's 420 kHz bandwidth and 0.14 V/µs slew rate.

For precision applications: ADA4051-1AKSZ-R7 features zero-drift architecture with 2 µV input offset voltage, compared to the TSV621ICT's 4 mV offset. OPA349SA/250 offers 2 mV input offset voltage.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TSV621ICT with any of these substitute parts on my PCB?

A: Yes, all listed substitutes use the identical 5-TSSOP (SC-70-5, SOT-353) package and pin configuration, enabling direct PCB replacement without layout modifications. However, verify that your application's supply voltage range and operating temperature requirements are met by the selected substitute.

Q: What is the key difference between the TSV621ICT and ADA4051-1AKSZ-R7?

A: The ADA4051-1AKSZ-R7 is a zero-drift amplifier with significantly lower input offset voltage (2 µV versus 4 mV) and lower slew rate (0.06 V/µs versus 0.14 V/µs). It consumes less supply current (15 µA versus 29 µA) but provides lower output current capability (15 mA versus 74 mA). Selection depends on whether precision or output drive capability is prioritized.

Q: Why do some substitutes have a minimum supply voltage of 1.8 V instead of 1.5 V?

A: The TSV621ICT operates at 1.5 V minimum, while most modern general-purpose amplifiers are designed for 1.8 V minimum supply voltage. If your application operates at 1.5 V, the TSV621ICT or a substitute specifically rated for 1.5 V operation is required. Verify the actual operating voltage of your circuit before selecting a substitute.

Q: Which substitute offers the best performance for high-frequency signal processing?

A: ISL28114FEZ-T7A and ISL28114FEZ-T7A provide the highest gain bandwidth product (5 MHz) and slew rate (2.5 V/µs), making them suitable for higher-frequency applications. ISL28113FEZ-T7A and ISL28113FEZ-T7A offer intermediate performance (2 MHz bandwidth, 1 V/µs slew rate). The TSV621ICT's 420 kHz bandwidth is suitable for lower-frequency signal processing.

Q: Are there any temperature range limitations I should consider?

A: OPA349SA/250 operates only to 70°C maximum, limiting its use to commercial temperature range applications. LMV301MG/NOPB and LMV301MGX/NOPB operate to 85°C maximum, suitable for extended commercial temperature range. For full industrial temperature range (-40°C to 125°C), select ISL28113FEZ-T7A, ISL28114FEZ-T7A, LMV931SQ3T2G, MCP6241UT-E/LT, or ADA4051-1AKSZ-R7.

Q: What is the difference between ISL28113FEZ-T7 and ISL28113FEZ-T7A?

A: Both parts are functionally identical with the same electrical specifications. The suffix designates different manufacturing date codes or tape reel configurations. Both are suitable substitutes for the TSV621ICT.

Q: Can I use LMV301MG/NOPB or LMV301MGX/NOPB if my circuit operates at 5.5 V?

A: No. LMV301MG/NOPB and LMV301MGX/NOPB support maximum supply voltage of 5 V only. If your circuit requires 5.5 V operation, select a substitute rated for 5.5 V maximum, such as ADA4051-1AKSZ-R7, ISL28113FEZ-T7A, ISL28114FEZ-T7A, LMV931SQ3T2G, MCP6241UT-E/LT, or OPA349SA/250.

Q: Which substitute provides the lowest input bias current?

A: LMV301MG/NOPB and LMV301MGX/NOPB offer 0.182 pA input bias current, and OPA349SA/250 offers 0.5 pA. These are significantly lower than the TSV621ICT's 1 pA, making them suitable for high-impedance input applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting regulatory and manufacturing process requirements equivalent to the original TSV621ICT.

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