LM339DR2GH - Quad Comparator, 3-36V | onsemi
MPN: LM339DR2GH ✗ انتهى عمره الإنتاجيLM339DR2GH نظرة عامة
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.
بدائل مباشرة لـ LM339DR2GH — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع LM339DR2GH (نفس عامل الشكل والبصمة) — يختلف في Comparator Type, Output Type, Common-Mode Input Range, Logic Compatibility, Number of Channels.
LM339DR2G
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM339DR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM393DR2GH
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM339DT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM339DR2GH الحدود القصوى والخصائص الكهربائية
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| Supply Voltage Range | 3 V to 36 V |
| Response Time | 1.3 us |
| نوع الخرج | 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 |
| نوع التركيب | Surface mount |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
دليل تكوين أطراف LM339DR2GH 14-soic
تكوين الأطراف لـ LM339DR2GH (حزمة 14-soic). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ LM339DR2GH.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
LM339DR2GH مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM339DR2GH — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Four-channel integration reduces package count (مقابلLM339DT)
- Wide supply operating range (مقابلLM339)
- Open-collector flexibility for wired interfaces (مقابلLM393DR2GH)
ملاحظات التصميم
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.
معلومات الامتثال
No explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was identified for this ordering code.
