My Inquiry
My Account
STMicroelectronics UA741IN
- Part No.:
- UA741IN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
UA741IN.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,361
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UA741IN from STMicroelectronics is a general-purpose single operational amplifier in an 8-pin DIP package, rated for -40°C to +105°C operation. It delivers 200 V/mV large-signal voltage gain, 0.5 V/μs slew rate, ±12 V input common-mode range, and internal frequency compensation for stable unity-gain operation in analog signal conditioning circuits.
For engineers reviewing the UA741IN datasheet, UA741IN pinout, UA741IN application, or UA741IN equivalent, key selection considerations include its wide supply range (±5 V to ±22 V), no external compensation requirement, short-circuit protected output, and offset null capability-critical for precision integrators, active filters, and summing amplifiers in industrial control and test equipment.
Technical Context
The UA741IN implements a classic bipolar input stage with NPN differential pair, current mirror load, and Class-A output stage with thermal protection. Its internal 30 pF compensation capacitor sets a dominant pole at ~10 Hz, yielding a 1 MHz gain-bandwidth product and 50° phase margin under unity-gain conditions.
It operates without external frequency compensation across all closed-loop gains ≥1, supports rail-to-rail input common-mode range up to ±12 V with ±15 V supplies, and features two dedicated offset null pins (1 and 5) for precise DC bias adjustment in high-accuracy applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±5 V to ±22 V - supports dual-rail operation in legacy analog systems with wide headroom margins |
| Large-Signal Voltage Gain | 25–200 V/mV - enables high-precision DC amplification with minimal error in feedback configurations |
| Slew Rate | 0.25–0.5 V/μs - limits full-power bandwidth to ~80 kHz at ±10 V swing, suitable for audio and instrumentation |
| Input Offset Voltage | 1–6 mV - determines baseline DC error in precision integrators and transducer interfaces |
| Common-Mode Rejection | 70–90 dB - suppresses noise and interference in differential sensor front-ends |
| Output Short-Circuit Current | 10–40 mA - provides robust fault tolerance without external current limiting |
| Gain-Bandwidth Product | 0.7–1 MHz - defines maximum stable closed-loop bandwidth at given gain setting |
Pinout & Package
UA741IN is supplied in an 8-pin plastic dual in-line package (DIP8) with 0.3-inch lead spacing, compliant with JEDEC MS-001. The package features through-hole mounting, 85 °C/W junction-to-ambient thermal resistance, and RoHS-compliant ECOPACK® construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null 1 | Connects to one end of external 10 kΩ potentiometer for DC input offset trimming |
| 2 | Inverting Input | Primary negative feedback node; accepts signal or reference for inverting configurations |
| 3 | Non-inverting Input | Positive input terminal; used in voltage followers and non-inverting amplifiers |
| 4 | VCC− | Negative supply rail connection; must be decoupled near pin for stability |
| 5 | Offset Null 2 | Connects to other end of same potentiometer as Pin 1 for balanced null adjustment |
| 6 | Output | Class-A push-pull output stage; capable of ±10 V swing into 2 kΩ load |
| 7 | VCC+ | Positive supply rail connection; requires local 100 nF ceramic decoupling |
| 8 | No Connect | Internally unconnected; left floating-no external tie required |
Key Features
| Feature | Design Value |
|---|---|
| No external frequency compensation required | Internal 30 pF capacitor ensures unconditional stability at unity gain, eliminating layout-sensitive external components |
| Large input voltage range | ±12 V common-mode range with ±15 V supplies enables direct interfacing with sensors and DAC outputs |
| Short-circuit protection | Current-limited output stage survives indefinite output-to-rail shorts without damage or latch-up |
| Offset null terminals | Dedicated Pins 1 and 5 allow sub-mV DC offset correction-essential for precision integrators and zero-bias amplifiers |
| No latch-up behavior | Bipolar process design prevents destructive parasitic SCR activation during overvoltage or ESD events |
Applications
| Industrial Sensor Signal Conditioning | Test Equipment Analog Front-End |
|---|---|
Use Scenario: Amplifying low-level thermocouple or strain gauge outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Precision DC-coupled inverting amplifier with offset nulling for <100 µV resolution. Use Value: 70–90 dB CMRR rejects common-mode noise from 50/60 Hz mains coupling in factory environments. | Use Scenario: Building variable-gain stages in benchtop oscilloscope vertical amplifiers. IC Role / Device Role / Timing Role: Stable unity-gain buffer and controlled-gain stage with predictable bandwidth. Use Value: Internal compensation ensures consistent 1 MHz GBW and 50° phase margin across production units. |
| Audio Tone Control Circuits | Legacy Industrial Power Supply Feedback |
Use Scenario: Implementing active bass/treble equalization in analog audio mixers. IC Role / Device Role / Timing Role: Low-distortion (0.06% THD) integrator and filter section in 20 Hz–20 kHz band. Use Value: 0.5 V/μs slew rate avoids slew-induced distortion on 1 Vpp sine waves up to 80 kHz. | Use Scenario: Error amplifier in linear regulator feedback loop for CNC motor drives. IC Role / Device Role / Timing Role: High-gain (200 V/mV), temperature-stable comparator-like error detector. Use Value: -40°C to +105°C operating range ensures reliability in enclosed, heat-prone enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM741CN | Same pinout and core specs, but rated only to +70°C; lower CMRR (70 dB min vs. 70–90 dB) | Limited to commercial-temperature environments; less robust in noisy industrial settings | Select when cost sensitivity outweighs extended temperature or noise immunity needs |
| TL071CP | JFET-input architecture; higher input impedance (2 MΩ vs. 0.3–2 MΩ), lower input bias current (65 pA vs. 10–200 nA) | Better for high-Z sensor interfaces (e.g., piezoelectric pickups); not drop-in due to different pinout | Choose for low-noise, high-impedance sources where offset nulling is secondary |
Compared with LM741CN, UA741IN offers wider temperature range and tighter CMRR spec; versus TL071CP, it trades input impedance for robustness, ease of offset trimming, and proven stability in legacy feedback designs.
Availability
UA741IN is available at Aetrix Electronics and suitable for industrial sensor interfaces, test equipment analog front-ends, and legacy power supply feedback loops requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UA741IN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The UA741IN belongs to ST's legacy analog amplifier portfolio, engineered for reliability and compatibility in long-lifecycle industrial and instrumentation systems where pin-for-pin interchangeability and proven stability are critical.
FAQ
What is the maximum supply voltage for UA741IN?
The absolute maximum supply voltage is ±22 V, meaning total supply span may reach 44 V. Operation beyond this risks permanent damage. For reliable long-term use, ST recommends staying within ±15 V for optimal performance and thermal safety, especially in DIP8 packages with 85 °C/W thermal resistance.
Does UA741IN require external compensation capacitors?
No. UA741IN includes an internal 30 pF compensation capacitor that ensures unconditional stability in unity-gain and higher-gain closed-loop configurations. This eliminates the need for external capacitors, simplifying PCB layout and reducing bill-of-materials count in standard amplifier applications.
How do I adjust input offset voltage on UA741IN?
Connect a 10 kΩ potentiometer between Pins 1 and 5 (Offset Null 1 and 2), with the wiper tied to VCC− (Pin 4). Adjusting the wiper changes the current balance in the input differential pair, trimming input offset voltage to ≤1 mV at room temperature-critical for precision integrators and zero-bias amplifiers.
Is UA741IN suitable for driving capacitive loads?
UA741IN is not optimized for heavy capacitive loads (>100 pF). Its 0.5 V/μs slew rate and internal compensation can cause instability or overshoot when driving >100 pF directly. For such cases, add a small series resistor (10–100 Ω) between output and load, or use a unity-gain buffer stage to isolate the capacitive load from the amplifier's feedback path.
UA741IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-DIP
UA741IN FAQ
1.How can I place an order for UA741IN through Aetrix?
Please submit a Request for Quotation (RFQ) for UA741IN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UA741IN reliable?
The price and inventory of UA741IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UA741IN is usually 5 days.
3.What payment methods are accepted for UA741IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UA741IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UA741IN?
UA741IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UA741IN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UA741IN?
For technical support, including UA741IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UA741IN requirements.
6.How does Aetrix verify that UA741IN is sourced from the original manufacturer or authorized distributors?
All UA741IN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UA741IN meets industry standards.
7.What is the process for return or replacement of UA741IN?
All UA741IN units undergo pre-shipment inspection (PSI). If there is an issue with UA741IN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UA741IN part is unused and in its original packaging.
Return procedure for UA741IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UA741IN Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
