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TSV851ILT Equivalent & Substitute Parts
Part Overview
The TSV851ILT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in a SOT-23-5 surface mount package. This rail-to-rail output amplifier operates across a 2.5 V to 5.5 V supply range and is designed for low-power applications requiring single-circuit amplification. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.
Substitute parts are necessary when the TSV851ILT becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from multiple qualified manufacturers offering equivalent electrical and mechanical characteristics.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 0.7 | V/µs |
| Gain Bandwidth Product | 1.3 | MHz |
| Current - Input Bias | 27 | nA |
| Voltage - Input Offset | 4 | mV |
| Current - Supply | 130 | µA |
| Current - Output / Channel | 70 | mA |
| Voltage - Supply Span (Min) | 2.5 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 125 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the TSV851ILT is determined by the following critical parameters:
Primary Substitution Criteria:
- Amplifier Type: General Purpose
- Number of Circuits: 1
- Output Type: Rail-to-Rail
- Mounting Type: Surface Mount
- Package compatibility: SOT-23-5 or equivalent footprint (SC-74A, SOT-753)
- Supply voltage range: Minimum 2.5 V, Maximum 5.5 V
- Operating temperature range: Minimum -40°C, Maximum 125°C (or higher)
Secondary Electrical Parameters:
- Gain Bandwidth Product: 1.3 MHz (substitutes with 1 MHz or higher are acceptable)
- Slew Rate: 0.7 V/µs (substitutes with equal or higher slew rate are acceptable)
- Current - Supply: 130 µA (substitutes with equal or lower supply current are preferred)
- Current - Output / Channel: 70 mA (substitutes with equal or higher output current are acceptable)
Compliance Requirements:
- RoHS3 Compliance (mandatory for active production parts)
- REACH Unaffected status (preferred)
Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with active product status) and Compatible Alternatives (meeting electrical and mechanical requirements with minor parameter variations).
Parameter Comparison
| Part Number | Manufacturer | Package | Slew Rate (V/µs) | GBW (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TSV851ILT | STMicroelectronics | SOT-23-5 | 0.7 | 1.3 | 27 | 4 | 130 | 70 | 2.5 | 5.5 | -40 to 125 | Active |
| APX321WG-7 | Diodes Incorporated | SOT-25 | 1 | 1 | 15 | 1.7 | 110 | 90 | 2.5 | 5.5 | -40 to 85 | Active |
| AZV321KTR-G1 | Diodes Incorporated | SOT-23-5 | 1 | 1 | 250 | 1.7 | 130 | 160 | 2.7 | 5.5 | -40 to 85 | Active |
| BU7241G-TR | Rohm Semiconductor | 5-SSOP | 0.4 | 0.9 | 1 | 1 | 70 | 12 | 1.8 | 5.5 | -40 to 85 | Active |
| LMV321IDBVR | UMW | SOT-23-5 | — | 1 | 10 | 0.8 | 45 | 25 | 2.1 | 5.5 | -25 to 85 | Active |
| LMV321IDBVT | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 125 | Active |
| LMV321M5/NOPB | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | 160 | 2.7 | 5.5 | -40 to 85 | Active |
| LMV321M5X/NOPB | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 85 | Active |
| LMV321Q1M5/NOPB | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 125 | Active |
| LMV321Q1M5X/NOPB | Texas Instruments | SOT-23-5 | 1 | 1 | 15 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 125 | Active |
Engineering Selection Recommendations
Tier 1 - Direct Equivalents (Highest Compatibility):
The LMV321IDBVT and LMV321Q1M5/NOPB parts from Texas Instruments provide the closest electrical match to the TSV851ILT. Both devices maintain the full -40°C to 125°C operating temperature range, identical supply current specification (130 µA), and SOT-23-5 packaging. The LMV321IDBVT is recommended for general applications, while the LMV321Q1M5/NOPB variant includes AEC-Q100 automotive qualification and is suitable for automotive-grade designs.
Tier 2 - Compatible Substitutes (Acceptable for Most Applications):
The LMV321M5X/NOPB and LMV321Q1M5X/NOPB variants from Texas Instruments are functionally equivalent but operate to -40°C to 85°C. These parts are suitable for applications not requiring the extended upper temperature range of 125°C. Both maintain SOT-23-5 packaging and 130 µA supply current.
The AZV321KTR-G1 from Diodes Incorporated offers SOT-23-5 packaging with improved output current capability (160 mA versus 70 mA) and lower input offset voltage (1.7 mV versus 4 mV). The minimum supply voltage is 2.7 V (versus 2.5 V), which may limit use in ultra-low-voltage applications.
Tier 3 - Alternative Packages (Package Substitution Required):
The APX321WG-7 from Diodes Incorporated uses SOT-25 packaging instead of SOT-23-5, requiring PCB layout modification. This part offers superior input bias current (15 nA versus 27 nA) and lower input offset voltage (1.7 mV versus 4 mV) but operates only to 85°C maximum.
The BU7241G-TR from Rohm Semiconductor uses 5-SSOP packaging and operates to a lower minimum supply voltage (1.8 V). This part has reduced output current capability (12 mA versus 70 mA) and lower gain bandwidth product (0.9 MHz versus 1.3 MHz), making it unsuitable for applications requiring higher output drive or bandwidth.
Compliance Status:
All recommended Tier 1 and Tier 2 substitutes maintain ROHS3 compliance and REACH Unaffected status, matching the TSV851ILT regulatory profile. The LMV321IDBVR from UMW is ROHS3 compliant but operates only to -25°C minimum temperature, restricting use in extended low-temperature environments.
Frequently Asked Questions (FAQ)
Q: Can the LMV321IDBVT directly replace the TSV851ILT without PCB modifications?
A: Yes. The LMV321IDBVT is pin-compatible in SOT-23-5 packaging and maintains identical supply current (130 µA), supply voltage range (2.7 V to 5.5 V minimum, 5.5 V maximum), and full temperature range (-40°C to 125°C). No PCB layout changes are required.
Q: What is the difference between LMV321M5/NOPB and LMV321Q1M5/NOPB?
A: Both parts are electrically identical with identical electrical specifications. The LMV321Q1M5/NOPB variant includes AEC-Q100 automotive qualification and is graded for automotive applications. The LMV321M5/NOPB is suitable for industrial and consumer applications. Both operate to -40°C to 85°C.
Q: Why does the AZV321KTR-G1 have higher output current (160 mA) than the TSV851ILT (70 mA)?
A: The AZV321KTR-G1 is designed with enhanced output stage capability. This parameter difference does not prevent substitution; applications requiring only 70 mA output current will operate within the AZV321KTR-G1 specifications. The higher output current rating provides additional design margin.
Q: Is the APX321WG-7 suitable as a substitute if my PCB uses SOT-23-5 footprints?
A: No. The APX321WG-7 uses SOT-25 packaging, which has different pin spacing and footprint geometry than SOT-23-5. PCB layout modification is required. Additionally, the APX321WG-7 operates only to 85°C maximum, which may be limiting for applications requiring the full -40°C to 125°C range of the TSV851ILT.
Q: Can the BU7241G-TR replace the TSV851ILT in high-output-current applications?
A: No. The BU7241G-TR has significantly reduced output current capability (12 mA versus 70 mA) and lower gain bandwidth product (0.9 MHz versus 1.3 MHz). This part is unsuitable for applications requiring the TSV851ILT's output drive specifications.
Q: What is the minimum supply voltage difference between the TSV851ILT and substitute parts?
A: The TSV851ILT operates at 2.5 V minimum supply voltage. Most substitutes (LMV321 variants, AZV321KTR-G1) require 2.7 V minimum. The BU7241G-TR operates at 1.8 V minimum, and the LMV321IDBVR operates at 2.1 V minimum. Applications operating at exactly 2.5 V to 2.6 V must use the TSV851ILT or verify substitute compatibility with actual supply voltage.
Q: Are all substitute parts ROHS3 compliant?
A: All recommended Tier 1 and Tier 2 substitutes are ROHS3 compliant. The LMV321M5 (obsolete variant) is RoHS non-compliant and should not be used for new designs. Verify RoHS compliance status for any part selected.
Q: What is the input bias current difference, and does it matter for my application?
A: The TSV851ILT has 27 nA input bias current. Most LMV321 variants have 15 nA. The AZV321KTR-G1 has 250 nA, and the BU7241G-TR has 1 pA. Input bias current affects high-impedance input circuits and precision applications. For standard signal conditioning, these differences are negligible. For transimpedance amplifier or precision measurement circuits, lower input bias current is preferred.
Q: Can I use the LMV321IDBVR in applications requiring -40°C operation?
A: No. The LMV321IDBVR operates from -25°C to 85°C. Applications requiring -40°C minimum temperature must use the TSV851ILT, LMV321IDBVT, or automotive-qualified LMV321Q1M5/NOPB variant.
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