LM339PWG4 - Quad Open-Collector Comparator | Texas Instruments
MPN: LM339PWG4 ✓ نشطLM339PWG4 نظرة عامة
A differential comparator is an analog integrated circuit that compares two input voltages and produces a binary result indicating which input is higher. The LM339 belongs to the comparator hierarchy within analog and mixed-signal semiconductors. Four independent channels allow one package to perform several threshold, level, window, or sensing functions. Its open-collector outputs require an external pull-up resistor, allowing the output voltage to be raised to a logic supply selected by the system designer.
Key features include four independent comparator channels, a wide 36 V operating supply range indicated by the manufacturer’s related part listing, and a 38 V maximum rating. The device offers a typical total supply-current drain of 0.8 mA, a low input offset of 0.37 mV, and an input bias current of 3.5 nA. Its open-collector architecture is useful for wired-AND buses, relay-driver interfaces, and systems that need a pull-up voltage different from the comparator supply.
The LM339 architecture is suited to general-purpose precision comparison rather than high-speed waveform discrimination. The manufacturer identifies LM339B, LM2901B, LM339, LM239, and LM139 as related quad differential comparators and states that the B-version is a drop-in replacement for the earlier A- and V-version families. Open-collector outputs can sink logic current but cannot actively drive a high voltage without a pull-up network.
Typical applications include sensor-threshold conditioning, battery and power-supply monitoring, industrial control interfaces, window comparators, LED status signaling, and open-collector alarm or relay-control signaling. The four-channel organization can also reduce package count when a board needs independent comparisons for multiple sensors or rails. In circuits sharing an input source, each channel can compare that source against a different threshold.
Designers should treat the output as a sinking device rather than a push-pull logic driver. Place the pull-up resistor close to the relevant output, account for rise time when driving capacitive loads, and use the pin-description table in the Texas Instruments datasheet when assigning PCB tracks. Input common-mode range, output pull-up voltage, and total supply dissipation must be checked against the intended application.
This product page combines the manufacturer’s device characteristics with engineering-focused comparisons, application guidance, pin-related cautions, and a strict same-package replacement analysis. It is designed to help engineers determine whether the 14-pin TSSOP LM339PWG4 fits a precision comparator design without assuming that a superficially similar part is electrically or mechanically interchangeable.
بدائل مباشرة لـ LM339PWG4 — 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 LM339PWG4 (نفس عامل الشكل والبصمة) — يختلف في Comparator Type, Package, Logic Compatibility, Supply Configuration, Number of Channels.
LM339PWRE4
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM339PWRG4
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM239PWRG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM2901PWRG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM339PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM339PWG4 الحدود القصوى والخصائص الكهربائية
| Comparator Channel Count | 4 channels |
| Comparator Type | 4 differential comparators |
| نوع الخرج | Open collector |
| Supply Configuration | Single or dual supply |
| Maximum Supply Voltage Rating | 38 V |
| جهد التغذية التشغيلي | 2 V to 36 V |
| Typical Supply-Current Drain | 0.8 mA |
| Typical Supply Current per Comparator | 200 uA |
| Low Input Offset Voltage | 0.37 mV |
| Low Input Bias Current | 3.5 nA |
| Input Common-Mode Range | Includes ground |
| Differential Input Voltage Range | Equal to maximum-rated supply voltage |
| Output Compatibility | TTL, MOS, and CMOS compatible |
| نطاق درجة حرارة التشغيل | 0 C to 70 C |
| ESD Rating HBM | 2 kV |
| العلبة | 14-pin TSSOP |
| نوع التركيب | Surface mount |
دليل تكوين أطراف LM339PWG4 14-pin tssop
تكوين الأطراف لـ LM339PWG4 (حزمة 14-pin tssop). 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 LM339PWG4.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
LM339PWG4 مناسب لـ 6 التطبيقs: Industrial Sensor Threshold Conditioning, Battery Voltage Monitoring, Power-Supply Fault Detection, LED Status and Level Indication, Window Comparator for Range Detection, Relay and Alarm Interface.
Industrial Sensor Threshold Conditioning
The LM339PWG4 is suitable for comparing multiple sensor outputs against independent reference levels because it contains four differential comparator channels in one 14-pin TSSOP package. Its 0.37 mV low input offset supports accurate decisions near the reference voltage, while the 3.5 nA input bias current limits disturbance of high-impedance sensing nodes. Each open-collector output can drive a digital input through a pull-up resistor. In an industrial controller, the four channels may monitor temperature, pressure, light, or current-sense outputs without requiring four separate comparator packages. The principal design checks are sensor common-mode range, input noise, pull-up voltage, response time, and the controller’s logic thresholds.
موصى به
Battery Voltage Monitoring
The LM339PWG4 can implement threshold alarms for battery-powered equipment by comparing a scaled battery voltage with precision references. Its differential inputs allow the monitored voltage and reference to be applied to separate pins, and the common-mode range includes ground for single-supply battery systems. The 0.8 mA typical total supply-current drain is useful when conserving energy during monitoring, although actual system consumption depends on the operating mode and pull-up network. Open-collector outputs can indicate an undervoltage, overvoltage, or charging condition to a controller. Designers should verify the comparator’s allowed input range at the highest battery voltage and include hysteresis to prevent repeated switching near a threshold.
موصى به
Power-Supply Fault Detection
The LM339PWG4 supports multi-rail power supervision by comparing divided feedback voltages from different supply rails against references. Four independent channels reduce component count in systems that must report several rail faults, while the low input offset helps minimize false trips near carefully chosen thresholds. Its open-collector output can be pulled up to the voltage required by a supervisor, controller, or fault LED network. Because the LM339 is a general-purpose comparator rather than a delay-based supervisor, the design must add any required timing or hysteresis behavior externally. Validate the input common-mode limits, supply tolerance, output timing, and the behavior during power-up and power-down before using it as a protection element.
موصى به
LED Status and Level Indication
The LM339PWG4 can convert an analog level into an LED on or off indication by comparing the signal with a reference and using the open-collector output to sink LED current. The four-channel arrangement supports separate red, amber, green, and fault indicators or multiple threshold points on one measured signal. Since the output sinks rather than sources current, the LED and current-limiting resistor are normally connected from a positive rail to the output, while a separate pull-up may establish a valid logic-high state. The low 0.37 mV offset can help produce precise transition points, but LED brightness, resistor tolerance, comparator delay, and noise near the threshold still influence the visible result.
موصى به
Window Comparator for Range Detection
Two LM339PWG4 channels can form a window comparator that identifies whether a monitored voltage lies between an upper and lower threshold. One channel detects the upper crossing and another detects the lower crossing, with their outputs combined by the system logic. The 14-pin package leaves other channels available for independent measurements. The 0.37 mV input offset and 3.5 nA input bias current are favorable for precision threshold networks, while the common-mode range including ground supports single-supply sensing. In practice, resistor tolerances dominate absolute threshold accuracy, so use low-tolerance divider resistors and add positive feedback for hysteresis where chatter would be unacceptable.
موصى به
Relay and Alarm Interface
The LM339PWG4 can operate an alarm, relay, or latch interface by using its open-collector output to sink current rather than driving a high voltage directly. For a relay-coil circuit, the coil is connected to a positive supply and the comparator output sinks its current, while a flyback diode clamps the inductive transient when the output turns off. The comparator’s low offset helps set the trip point, but relay minimum operate voltage, coil current, contact requirements, and output sink capability must be checked separately. A pull-up resistor can provide a separate fault signal to a controller, allowing the same output node to indicate an active condition.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM339PWG4 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM339PWRE4 | LM339PWRG4 | LM239PWRG4 | LM2901PWRG4 | LM339PT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | ROHM Semiconductor |
| Package | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP |
| Comparator Count | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
أبرز الفروقات
- Four independent general-purpose comparator channels (مقابلLM339PT)
- Commercial-temperature option within the TI LM339 family (مقابلLM239PWRG4)
- Direct same-package sourcing path within the Texas Instruments family (مقابلLM339PWRE4)
- Low-offset precision from the same four-channel package (مقابلLM2901PWRG4)
ملاحظات التصميم
Treat every LM339PWG4 output as an open-collector sink, not as a push-pull logic driver. Add a pull-up resistor to the intended logic rail and calculate its maximum current from the lowest possible sink current, supply tolerance, and short-circuit behavior. If the output drives a cable, relay, or long PCB trace, include protection against transient current and account for the slower rising edge created by the pull-up resistance and total capacitance.
Place input, feedback, reference, and bypass components close to their associated LM339PWG4 pins. Keep comparator input traces away from relay-coil wiring, switching-node copper, and other high-current paths to reduce noise coupling. Ground the comparator using a continuous return path, and avoid routing open-collector outputs beneath sensitive analog inputs. Use the pin-description table in the Texas Instruments datasheet when defining the PCB footprint and net assignments.
Add positive feedback around the selected channel when the input may cross the threshold slowly, because noise near the comparison point can cause output chatter. The effective threshold depends on the feedback network as well as the reference divider, so recalculate it using the worst-case resistor tolerance and the 0.37 mV input-offset value. For fast-changing inputs, check comparator response time in the manufacturer datasheet and confirm that the output transition meets the receiving circuit’s timing requirement.
Single-supply operation is attractive when the measured signal remains inside the comparator’s input common-mode range, which includes ground. Verify the maximum input voltage, supply limits, and output pull-up rail under every operating mode. Estimated: the total quiescent supply demand is approximately 200 uA per active comparator, or about 800 uA for four channels; actual consumption also includes resistor networks and external pull-up current.
معلومات الامتثال
The product listing identifies a 14-pin TSSOP package, but no explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified. AEC-Q100 status is recorded as not applicable because the device is not identified as an automotive-qualified variant.
