MC4558CP1 - Dual 2.5MHz Wide-Bandwidth Op-Amp DIP-8 | onsemi
MPN: MC4558CP1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
| 10 | $0.9 | $9.00 |
| 100 | $0.78 | $78.00 |
| 500 | $0.65 | $325.00 |
| 1,000 | $0.55 | $550.00 |
MC4558CP1 Overview
What is an operational amplifier (op-amp)? An op-amp is a high-gain DC-coupled differential voltage amplifier that uses external feedback components to set closed-loop behavior, and dual op-amps integrate two such amplifiers in one package. In the signal-chain taxonomy, op-amps sit beneath active filters, instrumentation amplifiers, and comparators, and above discrete transistors in the analog IC hierarchy. The MC4558 series belongs to the bipolar-junction-transistor (BJT) input, voltage-feedback amplifier class, which combines low input bias current, moderate noise, and rail-to-rail-free swing within headroom-limited supply rails.
Key features include no requirement for external frequency compensation, internal latch-up immunity, large common-mode and differential input voltage ranges, matched gain and phase between the two on-chip amplifiers, low input noise, and parameter tracking over temperature. The DIP-8 plastic package supports hand-soldered prototyping and educational lab use where through-hole leads are preferred over SMT. Operating supply is typically ±15 V dual or +30 V single-ended, and the part is specified for the commercial 0 °C to +70 °C range on the C-suffix and -40 °C to +85 °C on the AC-suffix variants.
The MC4558CP1 architecture is a classic bipolar voltage-feedback topology: a PNP input differential pair feeds a current-mirror active load, driving a high-gain second stage with class-AB push-pull output. The internal compensation capacitor rolls off open-loop gain at roughly 6 dB/octave above the dominant pole, which is why the unity-gain bandwidth exceeds the 1 MHz figure of the older 1458 by a factor of three. Designers can therefore use the part in unity-gain buffers without external compensation components.
Typical applications include audio pre-amplifiers and tone-control stages, active filters and equalizers, transducer signal-conditioning front-ends, integrators, comparators, and general-purpose DC amplifiers in industrial controls. The DIP-8 package also makes the MC4558CP1 a preferred teaching reference for electronics curricula and breadboard prototyping.
When designing with this op-amp, observe the supply headroom limits and pair the part with appropriately rated supply bypass capacitors placed within 1 cm of the VCC/VEE pins to maintain stability and minimize channel crosstalk. The matched amplifier pair simplifies layout when both channels must share identical bandwidth and phase response, e.g., in stereo audio front-ends.
This page synthesizes distributor pricing, drop-in alternatives from the 1458/4558 family, and practical design notes not consolidated in any single manufacturer datasheet.
Drop-in alternatives for MC4558CP1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC4558CP
✅ Drop-In📋 Reference alternative (not in catalog)
MC4558ACN
✅ Drop-In📋 Reference alternative (not in catalog)
MC4558CP
✅ Drop-In📋 Reference alternative (not in catalog)
MC4558CP
✅ Drop-In📋 Reference alternative (not in catalog)
MC1458P
✅ Drop-In📋 Reference alternative (not in catalog)
RC4558P
✅ Drop-In📋 Reference alternative (not in catalog)
MC4558CP1 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Dual operational amplifier |
| Number of Channels | 2 |
| Unity-Gain Bandwidth (MC4558AC) | 2.5 MHz (typical/guaranteed) |
| Unity-Gain Bandwidth (MC4558C) | 2.0 MHz (typical/guaranteed) |
| Supply Voltage, Dual | ±18 V (max), ±15 V (typical) |
| Supply Voltage, Single | 36 V (max) |
| Common-Mode Input Range | Large (per datasheet) |
| Differential Input Voltage Range | Large (per datasheet) |
| Internal Compensation | Yes (no external cap required) |
| Latch-up Immunity | Yes |
| Operating Temperature (C suffix) | 0 °C to +70 °C |
| Operating Temperature (AC suffix) | -40 °C to +85 °C |
| Package | PDIP-8 (through-hole, DIP-8) |
| Mounting Type | Through-Hole |
| RoHS Status | Compliant (per distributor listings) |
MC4558CP1 Pin Configuration
| Pin 1 | OUT_A — Channel A amplifier output |
| Pin 2 | IN-_A — Channel A inverting input |
| Pin 3 | IN+_A — Channel A non-inverting input |
| Pin 4 | VEE — Negative supply voltage (or GND for single-supply) |
| Pin 5 | IN+_B — Channel B non-inverting input |
| Pin 6 | IN-_B — Channel B inverting input |
| Pin 7 | OUT_B — Channel B amplifier output |
| Pin 8 | VCC — Positive supply voltage |
Typical Applications
MC4558CP1 is suitable for 6 applications: Audio Pre-Amplifier Stages, Active Filters and Equalizers, Transducer Signal Conditioning, Integrators and Comparators, General-Purpose DC Amplifiers, Educational Lab and Breadboard Prototyping.
Audio Pre-Amplifier Stages
The MC4558CP1's 2.5 MHz AC-grade unity-gain bandwidth and low distortion make it well-suited for line-level and phono audio pre-amplifier stages in consumer HiFi and mixer consoles. Per the onsemi datasheet, the part's bipolar input stage delivers moderate input bias current (~200 nA typical) and input voltage noise compatible with moving-magnet phono cartridge levels when paired with a passive RIAA network. Placed between a stereo source and tone-control stage with 47 kohm input impedance, the MC4558 provides clean voltage gain up to 20 kHz with adequate phase margin. Compared to a 1458, the wider bandwidth reduces closed-loop distortion at 20 kHz, though the NE5532 remains the better low-noise alternative for audiophile designs.
Recommended
Active Filters and Equalizers
The MC4558CP1 is widely used in Sallen-Key and multiple-feedback active filter topologies for audio crossovers, parametric equalizers, and anti-aliasing filters. Its 2 MHz unity-gain bandwidth supports filter cutoff frequencies up to 200 kHz in unity-gain buffers and up to 100 kHz in moderate-Q band-pass stages. According to the onsemi datasheet, the matched phase and gain between the two on-chip amplifiers simplify stereo filter designs where both channels must track identically. Designers pair the part with 0.1% metal-film resistors and NP0/C0G capacitors to maintain filter accuracy, and bypass supplies with 10 µF electrolytic plus 0.1 µF ceramic capacitors within 1 cm of the VCC and VEE pins.
Recommended
Transducer Signal Conditioning
In industrial transducer front-ends, the MC4558CP1 conditions low-level signals from thermocouples, strain gauges, and piezoelectric sensors before ADC digitization. Its wide common-mode input range and ±18 V supply tolerance accommodate sensor bridges operating from ±12 V rails with high immunity to ground noise. Per the onsemi datasheet, the matched amplifier pair simplifies differential-to-single-ended conversion for load-cell weigh scales, where one channel amplifies the bridge output and the second subtracts the common-mode voltage. Designers typically set closed-loop gain to 100 and add a 10 Hz first-order low-pass filter at the output to suppress 50/60 Hz line noise.
Recommended
Integrators and Comparators
The MC4558CP1 functions as a classic op-amp integrator for waveform generation, sample-and-hold circuits, and analog computing blocks. Its internal compensation eliminates the need for external capacitors, simplifying inverting integrator designs where feedback is a 100 kohm resistor in series with a 10 nF capacitor for a 1 kHz integration corner. As a comparator, the part provides a propagation delay of roughly 2 µs due to its slew-rate-limited output stage, suitable for non-critical zero-crossing detection and threshold monitoring. The onsemi datasheet recommends a 10 kohm pull-up resistor on the output when used as a comparator to speed up low-to-high transitions.
Recommended
General-Purpose DC Amplifiers
The MC4558CP1 serves as a building block for non-inverting and inverting DC amplifiers with gains from 1 to 1000 in instrumentation, test, and educational designs. According to the onsemi datasheet, the part's input offset voltage of typically 1-5 mV and input bias current of 200 nA place it in the general-purpose category, not precision. For sensor signal paths requiring offset below 100 µV, designers should select an op-amp with chopper stabilization or laser-trimmed input stages. The dual-channel package is particularly convenient for power-supply feedback loops where one channel senses voltage and the second regulates current.
Recommended
Educational Lab and Breadboard Prototyping
The PDIP-8 through-hole package of the MC4558CP1 makes it a preferred choice for electronics curricula, breadboard prototyping, and hobby projects. The DIP-8 form factor fits standard 8-pin IC sockets and breadboards without SMD adapters, allowing students to swap and experiment with multiple op-amp circuits. The part's robust ±18 V supply tolerance and internal protection diodes make it forgiving of wiring mistakes common in learning environments. Many university electronics labs use the MC4558CP1 to demonstrate the classic 1458/4558 dual op-amp pinout that persists across modern surface-mount equivalents like the TL072 and LM358.
Recommended
Recommended Products Summary
Engineering reference data for MC4558CP1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC4558CP (onsemi) | MC4558ACN | MC4558CP (ST) | MC4558CP (Fairchild) | MC1458P | RC4558P |
|---|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | STMicroelectronics | Fairchild Semiconductor | onsemi | Texas Instruments |
| Package | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Unity-Gain Bandwidth | 2.0 MHz (C grade) | 2.0 MHz | 2.5 MHz | 2.0 MHz | 2.0 MHz | 1.0 MHz | 3.0 MHz |
| Supply Voltage (max dual) | ±18 V | ±18 V | ±18 V | ±18 V | ±18 V | ±18 V | ±18 V |
| Internal Compensation | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C |
| Pin-to-Pin Compatible | Yes (standard 1458 pinout) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide-bandwidth dual op-amp in industry-standard 1458 pinout (vs MC1458P)
- AC grade offers extended temperature and wider bandwidth (vs MC4558CP (C grade))
- Pin-compatible upgrade for legacy through-hole designs (vs NE5532P)
- Multi-source availability across onsemi, ST, and Fairchild (vs Single-source competitors)
Design Notes
Place a 0.1 µF ceramic bypass capacitor within 1 cm of each supply pin (VCC pin 8, VEE pin 4) and a 10 µF electrolytic bulk capacitor at the board-level supply entry point. For dual-supply designs with ±15 V rails, use a 0.1 µF X7R ceramic in parallel with a 10 µF aluminum-polymer capacitor to suppress switching regulator noise and channel-to-channel crosstalk between the two on-chip amplifiers.
Route the inverting input trace (pins 2 and 6) as short and direct as possible to minimize parasitic capacitance, which can degrade phase margin in unity-gain buffers and high-frequency active filters. Keep input traces away from the output traces of either channel to avoid positive feedback oscillation. For DIP-8 breadboard prototypes, use a star-ground topology at pin 4 (VEE) to prevent ground loops between the two amplifier channels.
Although the MC4558CP1 is internally compensated, capacitive loads greater than 100 pF directly on the output can cause peaking or oscillation. Add a 50-100 ohm isolation resistor between the output and a capacitive load to maintain stability. For unity-gain buffers driving long cables, place the isolation resistor at the op-amp output and add a 1 nF to 10 nF capacitor at the cable end to filter RF pickup.
Do not exceed the ±18 V dual-supply or 36 V single-supply absolute maximum rating, and always observe the input common-mode voltage range (VEE + 3 V to VCC - 3 V typical). Exceeding the input common-mode range causes phase reversal or saturation of the input differential pair. For single-supply 0-30 V designs, bias the non-inverting input to mid-supply (VCC/2) using a 10 kohm/10 kohm divider with a 10 µF bypass capacitor to keep both inputs within the common-mode range.
Compliance Information
RoHS compliant per LCSC and Octopart distributor listings. PDIP-8 uses lead-free terminal plating. Not AEC-Q100 qualified - choose MC4558ACN or other automotive-grade variants for vehicle applications.
