MC3302DG - 3-36V Quad Comparator | onsemi | 14-SOIC
MPN: MC3302DG ✓ ActiveMC3302DG Overview
A comparator is an analog integrated circuit that compares an input voltage against a reference voltage and produces a digital logic result. The MC3302DG belongs to the comparator hierarchy within analog mixed-signal ICs, where its four channels provide compact threshold monitoring, signal conditioning and system-level decision logic. Compared with a general-purpose operational amplifier used as a comparator, this device is purpose-built for logic-level output behavior.
Key features include four comparators in one package, single-supply operation from 3 V to 36 V, typical low input bias current of 25 nA, typical input offset current of plus or minus 5 nA, and open-collector outputs suitable for CMOS and TTL-compatible interfacing. The commercial temperature range is -40 C to +85 C, making the part suitable for industrial and commercial equipment when its electrical ratings are respected.
The low input bias current helps reduce errors in high-impedance sensing circuits, while the low input offset current supports sensing nodes where small current differences determine the comparison result. Its open-collector output architecture gives the designer control over pull-up voltage and can support wired logic, but each output requires an appropriate pull-up arrangement to operate as a conventional logic signal.
Typical applications include battery threshold detection, power-supply monitoring, memory-cell sensing, industrial control interfaces, sensor conditioning and general digital threshold logic. The 14-SOIC package offers enough pin spacing for hand assembly and inspection while supporting compact PCB layouts in industrial control, instrumentation and embedded systems.
When designing around the MC3302DG, account for the open-collector output, choose suitable pull-up resistors, maintain the input common-mode range across temperature, and verify output-state timing in the complete system. Because several channels share a package, power-supply noise and ground-return paths can affect more than one comparator, so careful decoupling and routing remain important.
This product page combines the manufacturer part identity, verified distributor data, package information, application guidance, design notes and documented drop-in alternatives to support faster component selection and PCB-level replacement planning.
Drop-in alternatives for MC3302DG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC3302DG (same form factor and footprint) — differing in Comparator Type, Input Offset Current, Mounting Type, Number of Channels, Output Type.
MC3302DR2G
✅ Drop-In📋 Reference alternative (not in catalog)
MC3302P
✅ Drop-InContact for price
View Datasheet →MC3302PWR
✅ Drop-In📋 Reference alternative (not in catalog)
MC3302DG Maximum Ratings & Electrical Characteristics
| Comparator Type | Single-supply quad comparator |
| Number of Channels | 4 |
| Supply Voltage Range | 3 V to 36 V |
| Output Type | Open-collector, CMOS and TTL compatible |
| Input Bias Current | 25 nA typical |
| Input Offset Current | plus or minus 5 nA typical |
| Output Current | 16 mA typical at 5 V |
| Operating Temperature Range | -40 C to +85 C |
| Package | 14-SOIC, 0.154 inch width, 3.90 mm width |
| Mounting Type | Surface mount |
| Number of Elements | 4 |
| Product Family | MC3302 |
| Supply Type | Single supply |
| Logic Level Compatibility | CMOS and TTL |
MC3302DG Pin Configuration
| Pin 1 | 1OUT — Comparator 1 open-collector output |
| Pin 2 | 1IN- — Comparator 1 inverting input |
| Pin 3 | 1IN+ — Comparator 1 non-inverting input |
| Pin 4 | VCC — Positive supply voltage |
| Pin 5 | 2IN+ — Comparator 2 non-inverting input |
| Pin 6 | 2IN- — Comparator 2 inverting input |
| Pin 7 | 2OUT — Comparator 2 open-collector output |
| Pin 8 | 3OUT — Comparator 3 open-collector output |
| Pin 9 | 3IN- — Comparator 3 inverting input |
| Pin 10 | 3IN+ — Comparator 3 non-inverting input |
| Pin 11 | VEE — Ground or negative supply connection |
| Pin 12 | 4IN+ — Comparator 4 non-inverting input |
| Pin 13 | 4IN- — Comparator 4 inverting input |
| Pin 14 | 4OUT — Comparator 4 open-collector output |
Typical Applications
MC3302DG is suitable for 6 applications: Battery Threshold Monitoring, Industrial Control Threshold Logic, Memory Interface Sensing, Sensor Signal Conditioning, Power Supply Supervision, Digital Logic Interface.
Battery Threshold Monitoring
The MC3302DG fits battery systems that require several digital threshold decisions from one analog monitoring device. Its four comparator channels can monitor pack voltage, charger state and auxiliary rails, while the 3 V to 36 V single-supply range covers both low-voltage portable systems and higher-energy industrial packs. The typical 25 nA input bias current helps limit loading on high-impedance sensing nodes. Use each open-collector output with a suitable pull-up resistor to create a logic-high indication, and select resistor values that balance current consumption against switching speed. Verify the input common-mode range across the complete battery discharge profile and temperature range.
Recommended
Industrial Control Threshold Logic
The MC3302DG is appropriate for industrial control boards that compare sensor-derived or supply-derived voltages against independent limits. Its four channels reduce the number of discrete comparator ICs needed when detecting overvoltage, undervoltage, ready signals or interlock conditions. The open-collector outputs support wired logic and allow the pull-up supply to match the receiving circuit, while the commercial temperature range of -40 C to +85 C covers typical controlled environments. For reliable operation, decouple the supply close to the device, keep comparator inputs away from high-current switching paths and include hysteresis where the monitored signal changes slowly.
Recommended
Memory Interface Sensing
The MC3302DG is explicitly positioned for memory applications where several analog thresholds must become digital control signals. Its four comparison channels can monitor memory-related voltages or compare sensed nodes against local references, while typical input bias current of 25 nA is useful for high-impedance signal detection. The device's open-collector outputs can drive pull-up networks or interface logic stages. Because memory timing can be sensitive to input-node capacitance, keep sensing traces short, avoid unnecessary test pads and confirm that the pull-up network does not slow valid transitions beyond the system timing budget.
Recommended
Sensor Signal Conditioning
The MC3302DG can convert a slowly varying sensor voltage into a clean threshold event for a digital controller. Its low typical input bias current of 25 nA reduces the input-referred error when the source impedance is high, and the four channels allow several alarm or set-point decisions to be handled together. Place a pull-up resistor on each open-collector output and select a logic-compatible pull-up voltage. If the sensor signal crosses the threshold slowly, add controlled positive feedback or another defined hysteresis network so that noise near the threshold does not produce repeated state changes.
Recommended
Power Supply Supervision
The MC3302DG is suitable for multi-rail power supervision where the controller must recognize good, high or low supply conditions. Four independent channels can compare multiple regulated rails against references, and the 3 V to 36 V operating range provides broad input-voltage coverage. Because the outputs are open collector, they can be pulled up to the voltage expected by supervisory logic or an external status latch. Route each comparison input away from switching nodes, maintain a low-impedance ground connection and place the supply bypass capacitor near the package pins to limit channel-to-channel disturbance.
Recommended
Digital Logic Interface
The MC3302DG can serve as an interface between an analog control point and CMOS or TTL-compatible digital logic. Its open-collector output permits a defined pull-up to the receiving logic rail, while the 16 mA typical output current at 5 V provides a useful reference for load planning. Use the device when the system needs a wired-output threshold function rather than a push-pull rail-to-rail driver. Account for the pull-up resistor's rise time, keep the output trace away from noisy sources and ensure the output remains compatible with the voltage and current requirements of the receiving gate.
Recommended
Recommended Products Summary
Engineering reference data for MC3302DG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC3302DR2G | MC3302P | MC3302PWR |
|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | onsemi | onsemi | onsemi | onsemi |
| Comparator Configuration | Quad comparator | Quad comparator | Quad comparator | Quad comparator |
| Number of Channels | 4 | 4 | 4 | 4 |
Key Differentiators
- Four threshold channels in one 14-SOIC package (vs MC3302DR2G)
- Wide single-supply operating range (vs MC3302DR2G)
- Low input loading for threshold sensing (vs MC3302P)
Design Notes
Place the supply bypass capacitor close to the VCC and VEE pins, and keep comparator inputs away from switching-regulator outputs and high-current return paths. Because all four channels share one package, inadequate decoupling can couple disturbance between threshold decisions. Use a short ground reference for every input and output pull-up to minimize ground-loop voltage offsets.
Every open-collector output requires an external pull-up resistor; without one, the output cannot establish a valid logic-high state. Select a resistor value that satisfies the receiving gate's input current while limiting the output transistor's sink current. Confirm that the pull-up supply remains within the comparator's output ratings and that no downstream device forces the output above its permitted range.
Add hysteresis when the monitored input crosses the reference slowly or contains noise near the decision threshold. Positive feedback around the appropriate input can create a controlled gap between rising and falling switching points. Keep the feedback resistor close to the device and verify that the added hysteresis does not alter the intended system threshold.
Compliance Information
Compliance status was not stated in the exact product data for MC3302DG. Verify the current onsemi product declaration and material compliance documentation before qualification.
