MC3302P - Quad Single-Supply Comparator | onsemi
MPN： MC3302P ✓ 啟用中MC3302P 概覽
A comparator is an analog integrated circuit that compares two input voltages and produces a logic-level output indicating which input is higher. The MC3302P belongs to the comparator hierarchy, which also includes voltage comparators and differential amplifiers used in control and signal-conditioning systems. As a single-supply device, it is intended for systems where the comparator must operate from one supply rail while detecting small voltage differences within that rail.
The MC3302P's four channels provide practical space savings compared with four discrete comparators. Its typical 25 nA input bias current minimizes loading on high-impedance sensing nodes, while the typical ±5.0 nA input offset current supports accurate threshold decisions near the reference voltage. The device is suited to console, automotive, and industrial applications where level detection and low-level sensing must be implemented with a familiar 14-pin through-hole footprint.
Each channel compares an inverting and a non-inverting input and provides an open-collector output, allowing the outputs to be pulled up as required by the host logic and to support wired logic when several outputs are combined. The open-collector architecture provides design flexibility but requires an external pull-up resistor. The output transistor can sink current when the comparator condition is met, while the pull-up establishes the inactive high voltage.
Typical uses include battery threshold detection, sensor signal conditioning, window or level comparison, memory-control interfaces, and industrial control modules. Because this is a legacy-style PDIP device, it is especially relevant to maintenance of existing equipment rather than new space-constrained designs. Designers should confirm the exact pinout and output truth table against the manufacturer documentation before modifying an existing board.
The principal design consideration is supply bypassing. Place the required decoupling capacitor close to the device supply pins and return each comparator input directly to its pin rather than routing it through shared analog traces. Account for input offset and bias currents when setting very small thresholds, and use a pull-up resistor compatible with the required output rise time and available sink current.
This product record combines verified manufacturer and distributor information with package, application, design, and replacement guidance. It also distinguishes exact technical data from values that require confirmation, helping engineers source MC3302P parts without treating unsupported compatibility or price claims as verified facts.
直接替換替代品，適用於 MC3302P — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
MC3302PG
✅ 直接替換📋 參考替代品（不在目錄中）
MC3302P 最大額定值與電氣特性
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| Supply Configuration | Single supply |
| Maximum Supply Voltage | 30 V |
| Differential Input Voltage Range | ±15 V |
| Input Bias Current | 25 nA typical |
| Input Offset Current | ±5.0 nA typical |
| 輸出類型 | Open collector |
| 封裝 | PDIP-14, 14 pins |
| 安裝類型 | Through-hole |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
MC3302P pdip-14, 14 pins 腳位配置指南
MC3302P（pdip-14, 14 pins 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MC3302P.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC3302P 適用於 6 應用s: Battery Threshold Detection, Industrial Level Sensing, Automotive Electrical Monitoring, Memory Control Interface, Consumer Equipment Condition Monitoring, Legacy Equipment Repair.
Battery Threshold Detection
The MC3302P is suitable for monitoring a battery or supply rail near a defined threshold because it combines four single-supply comparator channels with a typical 25 nA input bias current. Place a resistor divider across the monitored voltage and apply the divided signal to one input while the other receives a precision reference. The open-collector output can directly drive a low-current status input when its voltage requirements are compatible. For low-current sensing, the 25 nA typical bias current is small relative to the divider current, while the ±5.0 nA typical offset can shift the comparison point. The primary tradeoff is that the comparator is specified for legacy through-hole industrial and automotive maintenance rather than compact battery-powered products.
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Industrial Level Sensing
The MC3302P fits industrial level-detection circuits that compare a sensor-derived voltage against a reference and produce a logic transition when a threshold is crossed. Its four channels can implement separate tank, reservoir, flow, or alarm comparisons while retaining a common supply arrangement. The typical 25 nA input bias current minimizes disturbance of high-impedance probes, and the ±5.0 nA typical input offset current provides a useful starting point for threshold-error analysis. Because the output is open collector, a pull-up resistor can establish the interface voltage for a relay driver, optocoupler, PLC input, or status indicator. Field designs should include input filtering and protection because long sensor cables can introduce noise and ESD events.
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Automotive Electrical Monitoring
The MC3302P can be used in legacy automotive electrical-monitoring designs that require multiple threshold comparisons on a 14-pin PDIP board. Four channels may monitor supply condition, sensor limits, or discrete warning signals while operating from a single supply. The verified family data identifies consumer, automotive, and industrial applications and rates the device for differential input voltages up to ±15 V and supply operation up to 30 V. The typical 25 nA input bias current helps preserve high-impedance sensor signals. However, the supplied excerpts do not establish the exact operating-temperature range or AEC-Q100 status, so this use requires confirmation from the applicable manufacturer document before qualification or volume production.
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Memory Control Interface
The MC3302P is specifically identified for memory applications and can implement threshold comparisons around memory-control signals. Each channel compares a logic or memory-derived voltage with a reference and provides an open-collector result that can be pulled up to the appropriate interface voltage. The single-supply architecture allows all four channels to operate from one rail, reducing the number of separate components in legacy control boards. The typical ±5.0 nA input offset current is relevant when a small logic-level decision must be repeatable. Designers should still account for input propagation delay, pull-up capacitance, and system timing because those detailed timing values were not present in the supplied verified excerpts and must be taken from the manufacturer datasheet.
推薦
Consumer Equipment Condition Monitoring
The MC3302P is appropriate for legacy consumer equipment that performs multiple level checks using a quad comparator. Examples include detecting an out-of-range control voltage, comparing a sensor signal, or generating an alert when a supply-derived signal crosses a limit. The typical 25 nA input bias current limits loading on high-impedance dividers, while four channels reduce the component count compared with separate single comparators. The open-collector outputs support flexible pull-up selection for TTL, CMOS, relay, or indicator interfaces. In cost-sensitive maintenance designs, the PDIP package is advantageous because it permits direct replacement on an existing through-hole board. Production qualification should not rely on an inferred temperature grade or automotive approval, neither of which was confirmed by the supplied data.
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Legacy Equipment Repair
The MC3302P is particularly valuable for repairing legacy industrial and consumer equipment built around a 14-pin PDIP quad comparator. Its single-supply operation, four-channel organization, and open-collector outputs align with older circuit architectures that use pull-up resistors and external logic interfaces. A direct replacement allows an engineer to retain the original PCB layout and connector arrangement rather than redesigning around a surface-mount package. During repair, verify the device markings, pin orientation, supply voltage, and pull-up network because archival inventory can include parts from different manufacturers. The ±5.0 nA typical input offset current should be considered when diagnosing a comparison point that differs slightly from the original design value.
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推薦產品摘要
工程參考資料，適用於 MC3302P — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC3302PG | MC3302P |
|---|---|---|---|
| Package | PDIP-14 | PDIP-14 | PDIP-14 |
| Brand | onsemi | onsemi | STMicroelectronics |
| Comparator Channels | 4 | 4 | 4 |
| Mounting Type | Through-hole | Through-hole | Through-hole |
主要差異化特點
- Four channels in one legacy-compatible package (對比Single comparators such as MC3403N in another package configuration)
- Low input loading for high-impedance sensing (對比Discrete comparator implementation)
- Small typical input offset current (對比Comparator alternatives with unspecified offsets)
- Single-supply level detection (對比Dual-supply comparator arrangements)
設計說明
Place the supply-decoupling capacitor immediately adjacent to the device supply pin and route the return directly to the ground plane. The verified material confirms operation up to 30 V but does not provide the required capacitance or supply-current limits, so those values must be taken from the manufacturer datasheet. Use a capacitor voltage rating appropriate for the actual rail and fault condition. Do not infer the bypass requirement from the older comparator family without checking the applicable MC3302 document.
Keep each inverting and non-inverting input route short, isolate it from switching nodes, and avoid sharing a narrow input trace among multiple channels. The typical 25 nA input bias current makes even moderate source impedances relevant, while the ±5.0 nA typical input offset can shift a precision threshold. Use a low-value reference divider or buffer where the required accuracy cannot tolerate divider loading. A solid ground reference under the DIP package also helps reduce output-return disturbance.
Do not omit the open-collector output pull-up resistor. Select it using the required logic-high voltage, maximum output sink current, allowable rise time, and the capacitance of the connected trace or load. Multiple open-collector outputs may be wired together only when the application permits wired logic and the resulting pull-up network remains valid. Verify the input and output truth table for the exact manufacturer source before replacing an archived Motorola device.
合規資訊
The supplied verified excerpts describe automotive and industrial applications but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields remain unknown rather than being inferred from the application descriptions.
