MC3302P - Quad Single-Supply Comparator | onsemi
料号： MC3302P ✓ 量产中MC3302P 概述
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.
直接替换替代料： MC3302P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC3302PG
✅ 直接替换📋 参考替代料（不在目录中）
MC3302P 最大额定值与电气特性
| 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 |
| 输出类型 | Open collector |
| 封装 | PDIP-14, 14 pins |
| 安装类型 | Through-hole |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
MC3302P pdip-14, 14 pins 引脚配置指南
MC3302P（pdip-14, 14 pins 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： MC3302P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC3302P 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MC3302P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Four channels in one legacy-compatible package （对比 Single comparators such as MC3403N in another package configuration)
- Low input loading for high-impedance sensing （对比 Discrete comparator implementation)
- Small typical input offset current （对比 Comparator alternatives with unspecified offsets)
- Single-supply level detection （对比 Dual-supply comparator arrangements)
设计说明
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.
合规信息
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.
