My Inquiry
My Account
STMicroelectronics MC33079YDT
- Part No.:
- MC33079YDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33079YDT.pdf
- Description:
- IC AUDIO 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:16,468
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC33079YDT from STMicroelectronics is a quad low-noise operational amplifier optimized for high-fidelity audio signal conditioning in automotive-grade systems. It delivers 4.5 nV/√Hz input voltage noise, 15 MHz gain bandwidth, 7 V/µs slew rate, and ±14.3 V output swing at ±15 V supply, supporting line-level preamplification and active filter stages in infotainment head units.
For engineers reviewing the MC33079YDT datasheet, MC33079YDT pinout, MC33079YDT application, or MC33079YDT equivalent, key selection criteria include its AEC-Q100-qualified SO-14 package, 0.002% THD at 20 Hz–20 kHz, -40 °C to +125 °C operating range, and symmetrical output drive capability for balanced audio paths.
Technical Context
The MC33079YDT integrates four independent high-slew-rate op-amps on a single monolithic die with internal frequency compensation for unity-gain stability. Its bipolar input stage provides low input bias current (250–800 nA) and low offset drift (2 µV/°C), while the output stage supports ±29 mA short-circuit current and rail-swing capability within 1.7 V of rails under 2 kΩ load.
Designed for wide-supply operation (±2.5 V to ±15 V), it maintains 100 dB CMRR and 105 dB PSRR across temperature, with phase margin ≥30° at 100 pF capacitive load-enabling robust performance in noisy automotive power domains without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise density | 4.5 nV/√Hz at 1 kHz - enables <10 µVrms integrated noise in 20 Hz–20 kHz audio band with proper filtering |
| Gain bandwidth | 15 MHz - supports stable 1× to 10× closed-loop gain up to 1.5 MHz for anti-aliasing filters |
| Slew rate | 7 V/µs - prevents slew-induced distortion on 10 Vpp signals above 110 kHz |
| THD+N | 0.002% at 3 Vrms, 20 Hz–20 kHz - meets CD-quality audio line-driver requirements |
| Output swing | ±14.3 V / ±14.6 V at ±15 V supply - delivers full-scale dynamic range into 600 Ω loads |
| Supply range | ±2.5 V to ±15 V - compatible with dual-rail automotive subsystems including 12 V battery-derived ±5 V or ±12 V rails |
| Operating temp | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and dashboard electronics |
Pinout & Package
MC33079YDT is supplied in an SO-14 (Small Outline, 14-pin) plastic micropackage with standard 1.27 mm pitch, 8.55–8.75 mm body length, and 5.8–6.2 mm body width. The package is RoHS-compliant and qualified to AEC-Q100 for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (amp A) | High-impedance differential node for feedback network connection; referenced to common-mode voltage range ±13 V |
| 2 | Non-inverting input (amp A) | Accepts AC-coupled or DC-biased signal source; input capacitance 12 pF limits HF stability if unshielded |
| 3 | Output (amp A) | Class-AB push-pull stage capable of ±29 mA sink/source into short circuit; 37 Ω open-loop output impedance |
| 4 | VCC− | Negative supply rail connection; must be decoupled locally with ≥100 nF ceramic capacitor near pin |
| 5 | Inverting input (amp B) | Independent channel input; shares no internal nodes with amp A-channel separation >120 dB at audio frequencies |
| 6 | Non-inverting input (amp B) | DC-coupled capable; input bias current 250–800 nA requires matched source impedances to minimize offset |
| 7 | Output (amp B) | Electrically isolated output; layout symmetry recommended to match trace inductance with amp A output |
| 8 | NC | No internal connection; left floating or grounded per PCB EMI mitigation strategy |
| 9 | Inverting input (amp C) | Third amplifier input; identical electrical specs to amps A/B; usable for stereo summing or auxiliary processing |
| 10 | Non-inverting input (amp C) | Supports DC-coupled configurations; common-mode range extends to ±14 V at VCC = ±15 V |
| 11 | Output (amp C) | Capable of driving 600 Ω loads to ±13.2 V; thermal derating required above 85 °C ambient |
| 12 | VCC+ | Positive supply rail; requires local 100 nF + 10 µF parallel decoupling for transient suppression |
| 13 | Inverting input (amp D) | Fourth channel input; fully independent; enables 4-channel active crossover or multi-band EQ |
| 14 | Non-inverting input (amp D) | Compatible with single-ended or differential input topologies; input resistance 175 kΩ sets gain-setting resistor limits |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | Bipolar input stage delivering 4.5 nV/√Hz input voltage noise-critical for microphone preamps and phono stages |
| Automotive qualification | AEC-Q100 Grade 1 certified (−40 °C to +125 °C), with enhanced ESD protection (2 kV HBM) for harsh vehicle environments |
| High-output drive | ±29 mA short-circuit current and ±14.6 V swing into 10 kΩ-supports direct interface to analog volume controls and LED drivers |
| Stability assurance | Guaranteed phase margin ≥30° with 100 pF capacitive load-eliminates need for external isolation resistors in cable-driving applications |
| Low-distortion performance | 0.002% THD+N over full audio band ensures fidelity retention in premium audio signal chains |
Applications
| Car Audio Preamp Stage | Active Crossover Network |
|---|---|
Use Scenario: Signal conditioning between digital-to-analog converter (DAC) and power amplifier in OEM infotainment head units. IC Role / Device Role / Timing Role: Quad op-amp configured as two dual-channel non-inverting amplifiers with selectable gain (1×, 2×, 4×) and DC-blocking AC coupling. Use Value: 0.002% THD+N and 4.5 nV/√Hz noise preserve SNR >110 dB across 20 Hz–20 kHz, meeting OEM acoustic benchmark targets. | Use Scenario: Frequency-dependent signal routing in 3-way speaker systems using passive RC networks and op-amp buffers. IC Role / Device Role / Timing Role: Four independent amplifiers implement 12 dB/octave low-pass, high-pass, and band-pass transfer functions with unity-gain stability. Use Value: 15 MHz GBP and 7 V/µs slew rate maintain phase coherence up to 100 kHz, preventing intermodulation distortion in multi-driver cabinets. |
| Instrumentation Signal Conditioning | Automotive Sensor Interface |
Use Scenario: Amplification and filtering of low-level transducer outputs (e.g., piezoelectric knock sensors, MEMS microphones) in test benches. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end using two MC33079YDT sections per channel for gain and common-mode rejection. Use Value: 100 dB CMRR and 2 µV/°C offset drift enable sub-mV signal resolution over full industrial temperature range. | Use Scenario: Analog signal buffering and level-shifting for oxygen sensor (lambda probe) or throttle position sensor outputs in engine control modules. IC Role / Device Role / Timing Role: Rail-to-rail compatible buffer stage translating 0–5 V sensor outputs to ADC input ranges while rejecting battery ripple. Use Value: 105 dB PSRR and −40 °C to +125 °C operation ensure accuracy under 12 V system transients and under-hood thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL074CDR | Higher noise (18 nV/√Hz), lower slew rate (13 V/µs), no AEC-Q100 qualification | General-purpose industrial/commercial audio; not suitable for automotive deployment | Select only for cost-sensitive non-automotive designs where noise floor >15 µVrms is acceptable |
| NE5532AP | Lower noise (5 nV/√Hz), higher supply current (8 mA per amp), DIP-8/SO-8 dual configuration | Requires two devices for quad functionality; lacks extended temperature rating beyond +85 °C | Prefer when board space allows dual placement and automotive qualification is not required |
Compared with TL074CDR and NE5532AP, MC33079YDT uniquely combines AEC-Q100 qualification, quad integration in SO-14, and 4.5 nV/√Hz noise-making it the only drop-in solution for space-constrained automotive audio signal chains requiring production-grade reliability.
Availability
MC33079YDT is available at Aetrix Electronics and suitable for automotive infotainment systems, precision sensor interfaces, and high-fidelity audio equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC33079YDT 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The MC33079YDT belongs to ST's legacy high-performance analog op-amp product line, engineered specifically for low-noise, wide-bandwidth signal conditioning in automotive audio and sensor signal chains.
FAQ
What is the maximum capacitive load the MC33079YDT can drive without instability?
The MC33079YDT is specified to maintain ≥30° phase margin with up to 100 pF capacitive load at unity gain, as verified in Figure 8 of the datasheet. Driving >100 pF requires series isolation resistance (≥100 Ω) at the output or closed-loop gain ≥10 to ensure stability in cable-driving or ADC-buffering applications.
Does MC33079YDT support single-supply operation?
MC33079YDT is optimized for dual-supply operation (±2.5 V to ±15 V) and does not support true single-supply operation down to ground. Its input common-mode range extends to within 2 V of VCC−, and output swing reaches within 1.7 V of rails-so it can function with split supplies derived from single 12 V or 24 V sources using charge pumps or regulators.
How does the AEC-Q100 qualification of MC33079YDT differ from standard MC33079D?
MC33079YDT undergoes additional screening per AEC-Q100 Grade 1, including extended temperature cycling (−40 °C to +125 °C), high-temperature operating life (1000 hrs at +125 °C), and enhanced ESD testing (2 kV HBM). The standard MC33079D is commercial-grade (0 °C to +70 °C) and lacks automotive qualification documentation or traceability.
Can MC33079YDT replace LM324 in existing designs?
MC33079YDT is not a direct replacement for LM324 due to differences in input stage (bipolar vs. PNP), supply range (±2.5 V min vs. 3 V single-supply), and quiescent current (10 mA vs. 0.8 mA). While both are quad op-amps, MC33079YDT offers superior noise, speed, and drive strength-but requires redesign of biasing, decoupling, and gain networks for compatibility.
MC33079YDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 250 nA
- Voltage - Input Offset:
- 2.5 mV
- Current - Supply:
- 8mA
- Current - Output / Channel:
- 37 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
MC33079YDT FAQ
1.How can I place an order for MC33079YDT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33079YDT 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 MC33079YDT reliable?
The price and inventory of MC33079YDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33079YDT is usually 5 days.
3.What payment methods are accepted for MC33079YDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33079YDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33079YDT?
MC33079YDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33079YDT 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 MC33079YDT?
For technical support, including MC33079YDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33079YDT requirements.
6.How does Aetrix verify that MC33079YDT is sourced from the original manufacturer or authorized distributors?
All MC33079YDT 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 MC33079YDT meets industry standards.
7.What is the process for return or replacement of MC33079YDT?
All MC33079YDT units undergo pre-shipment inspection (PSI). If there is an issue with MC33079YDT, 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 MC33079YDT part is unused and in its original packaging.
Return procedure for MC33079YDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33079YDT 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
