LM339PWRG4 - Quad Differential Comparator | Texas Instruments
MPN: LM339PWRG4 ✓ نشطLM339PWRG4 نظرة عامة
A differential comparator is an analog integrated circuit that evaluates the relationship between two input voltages and produces a binary result. When the voltage applied to the non-inverting input exceeds the voltage applied to the inverting input, the corresponding output changes state according to the device's output circuit. The LM339 belongs to the comparator hierarchy within interface ICs and combines four channels in one package, reducing component count in multi-threshold, window-detection, and control systems.
The principal advantages of the LM339PWRG4 are its four-channel integration, low supply-current drain, low input-bias current, and open-collector outputs. According to the manufacturer datasheet, the supply-current drain is typically 0.8 mA and is independent of supply voltage. Each output can sink useful logic current while remaining compatible with TTL, MOS, and CMOS systems. A pull-up resistor is required when the output is used as a wired logic node.
The comparator's architecture supports single or dual supplies, with a wide operating-voltage range and a maximum-rated supply of 30 V for non-V devices. The common-mode input range includes ground, allowing the device to monitor signals near 0 V. The differential input-voltage range can equal the maximum-rated supply voltage. These characteristics are useful in power-supply control, battery monitoring, industrial sensing, and analog signal conditioning where input levels may exceed conventional logic supply ranges.
Typical uses include overvoltage and undervoltage monitoring, current-limit detection, sensor threshold comparison, open-collector alarm signaling, and multi-level battery supervision. Because each of the four channels can compare a separate signal pair, systems can implement several protection functions while sharing the same device. Input and output behavior must be checked against the operating supply, source impedance, pull-up network, and required switching speed.
The primary design consideration is the open-collector output. Add a suitable pull-up resistor to the positive supply or another valid logic rail, and confirm that its maximum current and switching speed suit the connected logic family. Avoid floating outputs, account for input offset and common-mode limits, and design signal paths so that nearby switching nodes do not disturb a comparison threshold. The 14-TSSOP package also requires a thermal pad-free layout with adequate solder-joint fillets and board-edge clearance.
This page consolidates manufacturer specifications, pin-package details, sourcing guidance, comparison parameters, and practical application notes for engineers evaluating the LM339PWRG4. It also distinguishes direct replacements from options that require electrical or package verification, helping prevent a superficially similar part from causing unexpected logic-level or output-stage incompatibilities.
بدائل مباشرة لـ LM339PWRG4 — 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 LM339PWRG4 (نفس عامل الشكل والبصمة) — يختلف في Package, Comparator Type, Output Type, Differential Input Voltage Range, Logic Compatibility.
LM339APWR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM2904PW
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM339PWRG4 الحدود القصوى والخصائص الكهربائية
| Comparator Type | General-purpose differential comparator |
| Number of Channels | 4 channels |
| Supply Configuration | Single supply or dual supply |
| Maximum-Rated Supply Voltage | 30 V for non-V devices |
| Tested Supply Voltage | 32 V for non-V devices |
| Typical Supply-Current Drain | 0.8 mA |
| Common-Mode Input Voltage Range | Includes ground |
| Differential Input Voltage Range | Equal to maximum-rated supply voltage |
| نوع الخرج | Open collector |
| Logic Compatibility | Compatible with TTL, MOS, and CMOS |
| Output Saturation Voltage | Low; exact value not stated |
| العلبة | 14-TSSOP, 4.40 mm width |
| عدد الأطراف | 14 pins |
| نوع التركيب | Surface mount |
دليل تكوين أطراف LM339PWRG4 14-tssop, 4.40 mm width
تكوين الأطراف لـ LM339PWRG4 (حزمة 14-tssop, 4.40 mm width). 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 LM339PWRG4.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
LM339PWRG4 مناسب لـ 6 التطبيقs: Battery Threshold Monitoring, Overvoltage and Undervoltage Protection, Industrial Sensor Interfacing, Window Voltage Comparator, Current-Limit Detection, Open-Collector Alarm Signaling.
Battery Threshold Monitoring
The LM339PWRG4 fits battery-pack supervision because four channels can monitor several voltage thresholds while the common-mode input range includes ground. Each differential channel can compare a divided battery voltage with a reference and pull its open-collector output low when the limit is reached. The 0.8 mA typical supply-current drain helps conserve battery energy, although pull-up resistors, divider current, and external logic add to the total load. Design the divider ratios around the comparator's offset and input-bias behavior, and keep all four channels within their common-mode and differential-input limits.
موصى به
Overvoltage and Undervoltage Protection
The LM339PWRG4 supports independent overvoltage and undervoltage detection by assigning separate comparator channels to different divided input rails. Its open-collector outputs can pull discrete fault lines low, providing a simple interface to TTL, MOS, or CMOS control logic. The common-mode input range includes ground, which helps when supervising a signal referenced to 0 V. Protection accuracy still depends on resistor tolerances and the comparator's input offset. The pull-up network must also tolerate the intended fault-state current while maintaining a valid logic level.
موصى به
Industrial Sensor Interfacing
The LM339PWRG4 is useful when industrial sensors produce analog voltages that must be converted into discrete control events. Four channels can compare separate sensor outputs with locally generated thresholds, while the wide supply and common-mode capabilities provide more headroom than ordinary low-voltage logic comparators. The open-collector output can operate a relay driver, optocoupler, or digital input when loaded correctly. In an industrial enclosure, add input filtering and surge protection, maintain a low-impedance reference, and verify the operating-temperature and isolation requirements of the complete sensing channel.
موصى به
Window Voltage Comparator
Two LM339PWRG4 channels can implement an upper and lower window comparator, producing a fault indication whenever a monitored voltage falls outside its acceptable range. The remaining channels can supervise another supply or provide additional trip points. Open-collector outputs allow the window signals to be combined with wired logic and pulled up to a suitable logic rail. Component tolerances and input offset establish the practical trip points, so use precision divider resistors and test end-of-range conditions across temperature. Confirm that the pull-up voltage and output sink current remain acceptable for the connected logic family.
موصى به
Current-Limit Detection
The LM339PWRG4 can detect a current-limit condition by comparing the voltage across a sense resistor with a reference voltage. One channel handles the overcurrent trip, while other channels monitor supply rails or provide additional system thresholds. Its open-collector output can assert a shutdown signal directly when the load path does not require level translation. The sense-node voltage must remain inside the common-mode range, and the differential input must not exceed its rating. Account for sense-resistor tolerance, comparator offset, propagation delay, and pull-up current when setting the effective trip point.
موصى به
Open-Collector Alarm Signaling
The LM339PWRG4 fits distributed alarm and interlock systems because each open-collector output can pull a shared wired signal low without driving the line high actively. Four channels can report separate fault states or participate in a priority-encoded alarm structure. A pull-up resistor establishes the normal high level, while the comparator handles the low-state assertion. Because the output is not push-pull, multiple open-collector nodes can be combined where the logic design permits. Choose the pull-up voltage to remain within the input limits of the receiving TTL, MOS, or CMOS device and account for the aggregate sink current.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM339PWRG4 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM339APWR | LM2904PW |
|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Comparator Configuration | Quad differential comparator | Quad differential comparator | Quad differential comparator |
| Number of Channels | 4 channels | 4 channels | 4 channels |
| Output Type | Open collector | Open collector | Open collector |
أبرز الفروقات
- Four independent comparisons in one surface-mount package (مقابلLM2904PW)
- Direct same-package family replacement path (مقابلLM339APWR)
- Ground-referenced input capability (مقابلLM2904PW)
ملاحظات التصميم
Do not treat an open-collector output as a push-pull logic output. Every output that drives a digital input must have a pull-up resistor to a valid positive supply, and the resistor must satisfy the receiving logic family's input-current, rise-time, and capacitive-loading requirements. Leaving the output without a pull-up can create a floating node and unpredictable digital behavior. Also verify that the pull-up voltage remains within the comparator's output and supply ratings.
Calculate the complete static load rather than considering only the comparator's 0.8 mA typical supply-current drain. Pull-up resistors can dominate the current budget when the output is asserted low, especially with a high pull-up voltage or low resistor value. Include input-bias current, divider networks, indicator loads, and attached logic in the supply design. Ensure that every channel remains inside the allowed differential-input and common-mode limits at startup, during fault conditions, and across the full supply range.
Place input resistors and any input-bypass components close to the corresponding TSSOP pins to minimize pickup from switching nodes. Route the ground reference directly to the device and keep high-current return paths away from the input and output pins. Use adequate copper and thermal-relief geometry for the 14-pin TSSOP footprint, verify the manufacturer land pattern, and inspect solder-joint fillets after assembly. Maintain spacing between adjacent comparator inputs when their thresholds differ widely.
Treat the comparator as a threshold element rather than a precision amplifier. Input offset, resistor tolerance, input-bias current, and propagation delay can shift the effective switching point. For slow signals, add hysteresis with positive feedback to prevent output chatter around the threshold. For faster signals, verify propagation-delay behavior against signal slew rate and bus timing, and keep pull-up capacitance low enough for the required rising edge.
معلومات الامتثال
The comparison material references RoHS and REACH status, but no explicit compliance conclusion was present. The LM339PWRG4 is not identified as an AEC-Q100-qualified automotive variant.
