LM219N - High-Speed Dual Comparator | STMicroelectronics
料号： LM219N ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
LM219N 概述
A voltage comparator is an analog integrated circuit that compares two input voltages and produces a digital logic state indicating which input is higher. In the broader semiconductor hierarchy, a comparator belongs to the linear and mixed-signal IC family and supports systems built around logic ICs, power management, signal conditioning, and control electronics. The LM219N’s dual-channel architecture lets one package perform two threshold decisions or operate as a window comparator.
Key verified features include low input currents, high gain, wide supply-voltage operation, and high-speed switching. The manufacturer's product page describes the LM219 family as precision high-speed dual comparators designed to operate from a single 5 V logic supply and ground. The distributor listing identifies the LM219N as having open-collector/open-emitter outputs and a 14-DIP package. Its comparator outputs can interface with TTL-compatible downstream logic when operated within the datasheet limits.
The LM219N is suited to pulse-width shaping, level detection, zero-crossing detection, industrial control, test equipment, and signal conditioning. The two independent channels provide flexibility for comparing a sensor signal against a reference or detecting upper and lower thresholds. Because it is a through-hole PDIP device, it is particularly useful for prototype boards, educational systems, legacy industrial equipment, and repair applications that require a standard 14-pin socket or plated-through-hole footprint.
Designers should verify supply polarity, input common-mode limits, output pull-up requirements, input overvoltage protection, and timing behavior against the manufacturer datasheet before applying the comparator. Open-collector outputs require an appropriate pull-up arrangement when a valid high-level output is needed. Input filtering and layout should minimize noise pickup around high-impedance comparison nodes, while bypassing supply pins close to the device helps preserve switching performance.
This page synthesizes verified manufacturer and distributor information, package details, application guidance, replacement qualification limits, and design notes. Because the supplied data does not provide complete numeric timing, temperature, output-current, or price tables, those fields are explicitly marked as data needed rather than estimated.
直接替换替代料： LM219N ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM219N （相同外形与封装尺寸） ——差异在于 Output Type, Package, Product Type, Mounting Type, Logic Compatibility.
快速对比工具——选择替代料号进行并排对比：
LM319N
✅ 直接替换📋 参考替代料（不在目录中）
LM219N 最大额定值与电气特性
| Product Type | High-speed dual voltage comparator |
| Comparator Channels | 2 |
| 电源电压 | Single +5 V to ±15 V |
| 输出类型 | Open-collector, open-emitter |
| Logic Compatibility | TTL |
| 封装 | 14-pin PDIP |
| 安装类型 | Through-hole |
| Input Current | Low input current |
| Voltage Gain | High gain |
| Typical Response Time | 80 ns |
LM219N 14-pin pdip 引脚配置指南
LM219N（14-pin pdip 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： LM219N.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM219N 适用于 6 应用s: TTL Logic-Level Detection, Window and Threshold Monitoring, Pulse-Width and Timing Control, Zero-Crossing Detection, Industrial Control and Alarm Systems, Test and Measurement Signal Conditioning.
TTL Logic-Level Detection
The LM219N fits TTL interface designs because the verified DigiKey listing identifies open-collector/open-emitter outputs and TTL compatibility. Use one comparator channel to convert a threshold decision into a logic-compatible signal, with a pull-up providing the high state when required. The dual-channel package can monitor two independent thresholds in a controller, alarm circuit, or digital interface. Because detailed output current and logic thresholds are not included in the supplied data, the pull-up value and operating margin must be selected from the manufacturer datasheet. Through-hole PDIP construction also makes the part convenient for prototype boards and legacy control systems.
推荐
Window and Threshold Monitoring
The LM219N's two independent comparator channels are useful for upper- and lower-threshold monitoring. One channel can compare a sensor or divided signal with a lower reference, while the other compares it with an upper reference. Their outputs can drive pull-ups, gates, or an alarm input to indicate whether the signal is inside or outside the permitted range. The architecture provides a compact dual-comparison solution in a 14-pin PDIP package. Exact reference accuracy, input common-mode limits, propagation delay, and output behavior must be confirmed in the complete manufacturer datasheet before setting production thresholds.
推荐
Pulse-Width and Timing Control
The LM219N is suitable for pulse-width, pulse-timing, and edge-detection circuits because the manufacturer describes the LM219 family as high-speed and low-input-current comparators. A reference voltage can be compared with a shaped pulse or ramp to produce a control signal. The open-collector output allows the circuit to drive a pull-up and support wired logic, while the dual package can compare complementary edges or generate complementary control events. The supplied data does not provide the complete LM219N timing limits, so pulse-width accuracy and maximum operating frequency should be calculated from the verified propagation-delay and output-transition characteristics.
推荐
Zero-Crossing Detection
The LM219N can support zero-crossing and sign-change detection when a bipolar or offset signal is compared with a reference near its crossing point. The low-input-current characteristic helps reduce loading of the signal source, and the open-collector output can feed a pull-up or external driver for downstream digital timing. A dual package allows the second channel to monitor a second crossing, provide hysteresis support, or supervise a second signal. Input common-mode range, slew behavior, and response timing are not supplied in the verified search excerpts and must be checked against the manufacturer datasheet for the chosen supply and signal amplitude.
推荐
Industrial Control and Alarm Systems
The LM219N can be used in industrial alarm and control circuits for overvoltage, undervoltage, or sensor-limit detection. Its dual-comparator organization reduces the number of packages needed when two limits must be checked, and the PDIP package supports through-hole maintenance designs. Open-collector outputs are useful for driving pull-ups, relay-driver stages, or logic inputs, provided the load and supply limits are verified. The verified material confirms the function and package but does not provide isolation ratings, surge limits, or industrial temperature specifications, so those requirements must be validated separately before use in safety-related equipment.
推荐
Test and Measurement Signal Conditioning
The LM219N is applicable in test equipment where an analog level must be converted into a digital event with predictable logic behavior. One channel can compare a measured node with a programmable or fixed threshold, while the other can provide a complementary or independent measurement. The open-collector/open-emitter output can drive instrument logic through a suitable pull-up, and the dual channel helps reduce board area. Because the supplied search data does not provide input-offset, noise, bandwidth, or common-mode values for LM219N, laboratory designs should verify those parameters and temperature behavior directly from the manufacturer datasheet.
推荐
推荐产品汇总
工程参考数据： LM219N ——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 | LM319N |
|---|---|---|
| Package | 14-pin PDIP | 14-DIP |
| Brand | STMicroelectronics | Texas Instruments |
| Comparator Type | High-speed dual comparator | Dual high-speed comparator |
| Number of Channels | 2 | 2 |
| Supply Range | Single +5 V to ±15 V | Single +5 V to ±15 V |
| Output Type | Open-collector, open-emitter | Open-collector |
| Logic Compatibility | TTL | RTL, DTL and TTL according to supplied comparison data |
关键差异点
- Verified STMicroelectronics LM219 family positioning （对比 LM319N)
- Through-hole package （对比 LM219D)
- Dual-channel integration （对比 Single-channel comparator implementations)
设计说明
The verified LM219 family information supports operation from a single +5 V supply through ±15 V supplies. Check the exact input common-mode range, output voltage limits, and supply-current limits for the operating condition before selecting resistors or downstream devices. Because the open-collector output may need a pull-up, calculate the pull-up current using the receiving input's high-level threshold, supply voltage, and output leakage rather than assuming the default logic voltage.
Place the comparator close to the signal source and keep high-impedance input traces short, with a ground reference nearby to reduce noise pickup. Route supply and pull-up connections directly to the relevant pins and place bypass capacitance close to the supply pins according to the manufacturer layout guidance. Through-hole construction is useful for prototypes, but lead spacing and pin numbering must match the 14-pin PDIP footprint exactly.
Do not treat an open-collector output as a actively driven push-pull logic output. Add the required pull-up, confirm its logic polarity, and verify that the load current remains within the comparator's allowed output conditions. Also avoid assuming LM319N is a guaranteed LM219N replacement: the supplied cross-reference data describes similarity, but complete pinout, input-range, offset, and timing compatibility still require datasheet review.
合规信息
The supplied verified search results do not provide LM219N-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is treated as not_applicable because the verified data describes a general-purpose comparator and does not claim automotive qualification; confirm any project-specific requirement with the manufacturer.