LM339DR2GH - Quad Comparator, 3-36V | onsemi
MPN： LM339DR2GH ✗ 停產LM339DR2GH 概覽
A comparator is an analog integrated circuit that compares two input voltages and changes its output state according to their relative relationship. The LM339 belongs to the hierarchy comparator > analog comparator > analog IC > semiconductor. Unlike an operational amplifier configured for closed-loop amplification, a comparator is intended for open-loop decision-making and is typically used where a digital output represents whether one voltage is above or below another threshold.
The LM339DR2GH provides four open-collector outputs, allowing each output to be pulled up to a compatible supply voltage through an external resistor. Open-collector outputs are useful when several devices must share a wired bus, but every pulled-up node requires suitable pull-up circuitry. The stated TTL and CMOS output compatibility supports interfacing with both bipolar and field-effect logic families. The 1.3-microsecond response time provides a defined delay for switching decisions without implying zero transition time.
The 3V to 36V supply range supports single-supply systems operating across low-voltage logic and higher industrial voltage rails. Split-supply operation is also possible when the circuit requires signals around ground. Because a comparator can tolerate input voltages extending beyond its supply rails within specified limits, designers must still verify the maximum differential input voltage and common-mode input range in the manufacturer datasheet before applying unusual rail or input conditions.
Typical uses include battery threshold detection, overvoltage and undervoltage protection, window comparison, sensor conditioning, relay or solenoid drive, oscillator timing, and general analog signal conditioning. The four independent channels are especially useful when a system must compare several rails or thresholds. Each channel should have its own defined input and output arrangement, with unused channels configured according to the manufacturer's guidance rather than left as floating inputs.
Design attention should focus on output pull-up voltage and current, input common-mode limits, differential input voltage, output saturation behavior, and the logic levels connected to the open-collector nodes. Keep sensitive input traces away from switching nodes and place pull-up resistors close to the corresponding output pins. The package is a 14-pin SOIC, so check the pin-description table and footprint before assigning PCB nets.
This product page organizes the identified LM339DR2GH specifications, same-package alternatives, application guidance, and design considerations into a concise engineering reference. It also separates functional requirements from procurement details so a designer can confirm pin compatibility, operating limits, and implementation constraints before releasing a schematic or layout.
直接替換替代品，適用於 LM339DR2GH — 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： LM339DR2GH （相同外形與佔位） — 差異在於 Comparator Type, Output Type, Common-Mode Input Range, Logic Compatibility, Number of Channels.
LM339DR2G
✅ 直接替換聯絡詢價
查看資料表 →LM339DR
✅ 直接替換聯絡詢價
查看資料表 →LM393DR2GH
✅ 直接替換聯絡詢價
查看資料表 →LM339DR2GH 最大額定值與電氣特性
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| Supply Voltage Range | 3 V to 36 V |
| Response Time | 1.3 us |
| 輸出類型 | Open collector |
| Logic Compatibility | TTL and CMOS |
| Supply Configuration | Single supply; split-supply operation is also supported |
| Package Type | 14-SOIC |
| Total Pin Count | 14 pins |
| 安裝類型 | Surface mount |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
LM339DR2GH 14-soic 腳位配置指南
LM339DR2GH（14-soic 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： LM339DR2GH.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM339DR2GH 適用於 6 應用s: Battery Overvoltage Detection, Industrial Sensor Conditioning, Power-Supply Sequencing, Window Comparator Control, Relay and Solenoid Drive, Signal Crossing Detection.
Battery Overvoltage Detection
The LM339DR2GH suits battery-pack protection because four open-collector comparison channels can monitor multiple divided voltage thresholds within one 14-SOIC package. Its identified 3V-to-36V supply range supports systems operating above conventional low-voltage logic levels, while the 1.3-us response provides a defined switching interval. A practical circuit uses a precision reference, resistor dividers, and pull-ups on the open-collector outputs. Check the common-mode and differential input limits before setting thresholds, and account for resistor tolerance and reference drift when sizing the divider.
推薦
Industrial Sensor Conditioning
The LM339DR2GH can convert sensor-derived voltages into hardware decisions when a robust threshold is more useful than a linear amplified output. Its four independent channels allow separate comparisons for temperature, pressure, light, or level signals, and the open-collector outputs can directly pull down a pull-up rail or drive a subsequent interface stage. Use resistive dividers and filtering to protect the inputs, and verify that the sensor's signal remains inside the comparator's common-mode range. The 14-SOIC package also reduces the footprint compared with four separate single comparators.
推薦
Power-Supply Sequencing
The LM339DR2GH can supervise several supply rails by comparing divided rail voltages against references and producing open-collector status signals. Its 3V-to-36V supply capability suits higher-voltage industrial supervision, while four channels provide enough independent decisions for a multi-rail monitor. Each channel needs an appropriate divider, reference, and output pull-up. Timing behavior should be considered when sequencing events depend on comparator response, and the design must remain within the documented differential and common-mode input limits during rail ramp-up.
推薦
Window Comparator Control
The LM339DR2GH is useful when a signal must remain between upper and lower bounds, because two channels can form a window detector and the other channels can monitor related parameters. Open-collector outputs allow the window state to feed a controller, relay driver, or fault indicator through suitable pull-up resistors. Set thresholds using stable references and resistor networks, and account for input offset when the guard band is narrow. Confirm operation over the full temperature range and supply tolerance before using the output for direct protection decisions.
推薦
Relay and Solenoid Drive
The LM339DR2GH can provide a low-side control decision for relays, solenoids, and indicator circuits by comparing a command voltage with a feedback threshold. The open-collector output is useful with an external driver because it can pull a control node low rather than driving a high-voltage load directly. Its four channels permit independent control of several loads, and the 14-SOIC package simplifies routing. Use a driver stage with suitable voltage and current ratings, protect switching nodes from comparator inputs, and keep the relay coil noise away from sensitive threshold networks.
推薦
Signal Crossing Detection
The LM339DR2GH can detect when two analog signals cross by feeding each channel's inputs from the signal and a threshold or another channel. This arrangement is useful for phase-oriented control, event detection, and simple zero-crossing functions. The 1.3-us response time provides a defined switching interval, while open-collector outputs can feed a timer, counter, or logic input through a pull-up. Add hysteresis to prevent repeated output toggling around a noisy crossing and respect the input limits when either signal can exceed the supply rails.
推薦
推薦產品摘要
工程參考資料，適用於 LM339DR2GH — 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 | LM339DR2G | LM339 | LM393DR2GH | LM339DT |
|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | onsemi | onsemi | Texas Instruments | onsemi | onsemi |
| Comparator Configuration | Quad differential comparator | Quad differential comparator | Quad comparator | Quad comparator | Quad comparator |
| Output Type | Open collector | Open collector | Open collector | Open collector | Open collector |
主要差異化特點
- Four-channel integration reduces package count (對比LM339DT)
- Wide supply operating range (對比LM339)
- Open-collector flexibility for wired interfaces (對比LM393DR2GH)
設計說明
Every open-collector output requires a pull-up unless another device provides the pull-up function. Choose the pull-up voltage to remain compatible with the connected TTL or CMOS input and calculate the resistor from the required sink current and output rise-time budget. Do not connect multiple open-collector outputs together unless the application intentionally uses wired-AND behavior and the resulting logic level and current budget are valid.
Place each output pull-up resistor close to the corresponding LM339DR2GH output pin to limit trace capacitance and improve transition speed. Route high-impedance input and divider nodes away from relay coils, switching-power nodes, and other sources of transient noise. Keep the analog ground return compact and connect it according to the manufacturer pin-description table, especially when the four channels share a supply and ground arrangement.
Add positive feedback or another deliberate hysteresis network when a compared signal can cross the threshold slowly or with noise; otherwise the open-collector output may chatter and repeatedly switch the connected load. Confirm that the divider and reference network do not force the comparator into an invalid common-mode condition. Validate the design across supply tolerance, temperature range, and worst-case resistor tolerance rather than relying only on the nominal threshold.
The 3V-to-36V rating describes the supply operating range, not permission to apply arbitrary input voltages. Check the common-mode input range and maximum differential input voltage before allowing inputs to exceed the supply rails. In battery, motor, or industrial systems, clamp or protect exposed nodes against transients, and account for input protection current when selecting series resistors.
合規資訊
No explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was identified for this ordering code.
