LM211N - Wide-Supply Voltage Comparator | STMicroelectronics
MPN： LM211N ✗ 停產LM211N 概覽
A voltage comparator is an analog integrated circuit that compares two input voltages and produces a logic-oriented output indicating which input is higher. In the broader semiconductor hierarchy, the LM211N belongs to the comparator class within analog and mixed-signal ICs. Its open-collector output architecture is useful when the next stage needs a pull-up supply or when multiple devices must share a wired bus.
The verified manufacturer-related results identify the LM111, LM211, and LM311 family as single high-speed voltage comparators designed for a wide range of supply voltages. The TI family description specifically highlights operation from ±15 V operational-amplifier supplies and 5 V logic supplies, while the ST result identifies low input currents and wide supply-voltage operation. The LM211N’s general-purpose comparator function supports threshold detection, sensing, switching, and control tasks.
The STMicroelectronics result describes the device as usable with standard ±15 V operational-amplifier supplies and single +5 V logic supplies. Its output is compatible with many TTL and MOS circuits, and it is capable of driving lamps or relays according to the verified TI family description. The exact STMicroelectronics LM211N electrical limits, timing values, input-offset figures, output-current limits, and temperature-grade details were not included in the supplied source snippets and are marked for data completion.
Typical applications include 5 V logic interfacing, relay or lamp drive, threshold crossing detection, industrial control, instrumentation, and systems where a comparator must operate across positive or split analog supplies. Because this product is an analog-to-logic decision element rather than a power device, SOA data is not applicable. The 8-DIP package is through-hole and is suited to legacy industrial, educational, prototype, and repair assemblies.
The principal design consideration is confirming the complete pinout, supply limits, input common-mode range, output pull-up arrangement, and timing limits from the manufacturer datasheet before replacing another LM211-family device. The supplied web results confirm the functional family and package category, but do not provide enough numeric detail to claim a fully qualified cross-brand drop-in replacement. Compare the DIP footprint, pin numbering, open-collector output, input arrangement, supply range, and propagation delay before substitution.
This page consolidates verified distributor and manufacturer-family information, identifies the LM211N’s comparator role and package category, and records missing technical values rather than guessing them. For a production replacement, use the official LM211N datasheet and validate every device-specific limit on the intended PCB.
直接替換替代品，適用於 LM211N — 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。
此系列的變體
與下列產品可直接替換的同系列型號： LM211N （相同外形與佔位） — 差異在於 Logic Compatibility, Mounting Type, Package, Product Type.
LM211PW
✅ 直接替換聯絡詢價
查看資料表 →LM311N
✅ 直接替換📋 參考替代品（不在目錄中）
LM211N
✅ 直接替換聯絡詢價
查看資料表 →LM211N 最大額定值與電氣特性
| Product Type | Single general-purpose voltage comparator |
| Logic Compatibility | DTL, MOS, open-collector, open-emitter, RTL, and TTL compatible output |
| Supply Range | Single +5 V through ±15 V supplies |
| Output Architecture | Open-collector output |
| Output Level Compatibility | Compatible with most TTL and MOS circuits |
| Input Current | Low input currents |
| 封裝 | 8-pin DIP |
| 安裝類型 | Through-hole |
LM211N 8-pin dip 腳位配置指南
LM211N（8-pin dip 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： LM211N.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM211N 適用於 6 應用s: 5 V Logic Threshold Detection, Relay Drive Interface, Lamp and Indicator Control, Analog Control and Alarm Interface, Laboratory and Educational Comparator Circuits, Legacy Industrial Control Boards.
5 V Logic Threshold Detection
The LM211N fits 5 V threshold-detection circuits because the verified family information explicitly supports single +5 V logic supplies and outputs compatible with many TTL and MOS circuits. Use it to compare a sensor or divided analog signal against a reference, then feed the decision into a digital control stage. Its open-collector output allows the interface voltage to be selected with an external pull-up, although the final resistor and output timing must be checked against the manufacturer limits. The design is useful when a legacy DIP-level logic system needs a flexible pull-up rail rather than a fixed active push-pull output.
推薦
Relay Drive Interface
The LM211N can serve as the decision element in relay-control circuitry because the verified LM211-family description identifies relay-driving capability. The comparator output may drive a transistor stage that switches a relay coil, allowing low-current logic to control a higher-current load. Add a flyback diode across an inductive coil and verify transistor voltage and current ratings; if the open-collector output cannot sink the required current directly, use it to drive an external NPN or MOSFET. The DIP package also makes this practical for repairable industrial control boards.
推薦
Lamp and Indicator Control
The LM211N can be used to switch lamps or indicators when the verified comparator-family output is configured with the appropriate pull-up and load driver. The comparator provides a threshold decision, while the external transistor or resistor network handles current and voltage isolation. For LED indicators, select the pull-up rail and resistor for the receiving device; for higher-current lamps, add appropriate switching margin and thermal design. This pattern is useful in legacy automation panels where a 5 V control signal must operate a larger indicator or lamp circuit.
推薦
Analog Control and Alarm Interface
The LM211N is appropriate for analog control and alarm circuits because a voltage comparator converts the relationship between two input voltages into a discrete logic decision. The verified family description supports wide supply-voltage operation and low input currents, which helps when the monitored signal is referenced to an analog supply rather than only to 5 V logic. Use suitable input conditioning and an output pull-up, and verify the input common-mode range before operation. The result is a useful limit, over-temperature, or sensor-event signal for a controller.
推薦
Laboratory and Educational Comparator Circuits
The LM211N’s 8-DIP through-hole package makes it convenient for laboratory breadboards, educational comparator demonstrations, and low-volume prototype assemblies. The verified distributor listing identifies the DIP package and general-purpose comparator function, allowing students or engineers to observe comparator behavior without a specialized surface-mount footprint. Connect the inputs carefully, include an output pull-up for the open-collector stage, and consult the official pinout before wiring. A shared ±15 V or single +5 V supply can simplify bench experiments, subject to the device-specific limits.
推薦
Legacy Industrial Control Boards
The LM211N is well suited to repair and modernization of legacy industrial control boards that use DIP comparators and open-collector logic interfaces. Its through-hole 8-DIP format supports socketed or hand-soldered replacement, while the wide supply family description covers common ±15 V and +5 V system rails. Before installing it, confirm pin numbering, strobe behavior, output polarity, input common-mode limits, and required output pull-up. For safety-related or high-energy circuits, use the manufacturer’s complete electrical and temperature limits rather than relying on family-level information.
推薦
推薦產品摘要
工程參考資料，適用於 LM211N — 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 | LM211P | LM311N | LM211N |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Comparator Type | Single general-purpose voltage comparator | Single high-speed voltage comparator | Single high-speed voltage comparator | Single high-speed voltage comparator |
| Supply Compatibility | +5 V through ±15 V family range | +5 V through ±15 V family range | +5 V through ±15 V family range | +5 V through ±15 V family range |
主要差異化特點
- General-purpose single-comparator format (對比LM311N)
- Through-hole DIP integration (對比LM211P)
- Logic-family compatibility (對比Texas Instruments LM211N)
設計說明
Do not assume that a family-compatible comparator is automatically a drop-in replacement. The supplied search results establish an 8-DIP LM211N and related family variants, but they do not provide the complete pin table or all electrical limits. Before substitution, compare supply pins, input polarity, output pin, strobe connection, package lead spacing, output architecture, propagation delay, input common-mode range, and temperature grade.
The LM211N’s open-collector output requires an intentional pull-up strategy. Select the pull-up rail to match the receiving TTL or MOS interface, then calculate the resistor using the confirmed output sink-current and logic-level limits. The supplied sources do not include those numerical limits, so do not finalize the resistor value from generic rules alone. Confirm output transistor behavior during startup and fault states.
For a through-hole legacy board, preserve the original DIP footprint and pin numbering, and keep the comparator input traces away from high-current switching nodes. Use a local bypass capacitor on the supply pins if the circuit’s stability and datasheet recommendations call for it. Because the provided sources omit the exact pinout and decoupling guidance, route according to the official manufacturer datasheet and validate the assembled board with the intended source and load combinations.
合規資訊
Compliance status was not present in the supplied verified snippets. AEC-Q100 is not applicable unless the specific device is explicitly qualified for automotive use; the supplied data does not provide such qualification.
