LM339PWRE4 - Quad 36V Differential Comparator | Texas Instruments
MPN： LM339PWRE4 ✓ 啟用中LM339PWRE4 概覽
A comparator is a differential analog input device that changes its output state when one input becomes higher than the other. The LM339 belongs to the comparator hierarchy within analog integrated circuits and combines four sensing channels in one package. Its open-collector outputs require an external pull-up resistor, allowing the output voltage, rise time, and interface level to be selected by the surrounding circuit.
The LM339 family is designed for single-supply or dual-supply operation. The manufacturer identifies a differential input range equal to the maximum-rated supply voltage of plus or minus 38 V, while the common-mode input range includes ground. These characteristics allow the device to monitor signals referenced to a negative rail or systems powered from widely separated supply rails.
According to the Texas Instruments product page, the outputs are compatible with TTL, MOS, and CMOS logic. The family also uses low supply current that remains largely independent of supply voltage, making it practical for battery-powered monitoring circuits where every microampere contributes to operating time. The comparison function is particularly useful when a system requires a digital indication of an analog threshold without converting the entire measurement chain to a digital signal.
Typical uses include overvoltage and undervoltage detection, sensor threshold switching, window comparators, relay or solenoid drivers, and battery monitoring. Four independent channels can reduce component count in a multi-rail supervisor, while the open-collector architecture permits wired logic, pulled-up alarm outputs, and interfacing to multiple destinations.
When laying out a circuit, place input and pull-up components close to the device and keep sensitive comparison nodes away from switching-current paths. Check the input common-mode range, output pull-up voltage, supply sequencing, and channel response time before using the comparator with slow-moving or noisy signals.
This product page combines manufacturer specifications, package and lifecycle information, sourcing guidance, and practical comparator-design guidance to support faster component selection, PCB implementation, and replacement planning.
直接替換替代品，適用於 LM339PWRE4 — 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： LM339PWRE4 （相同外形與佔位） — 差異在於 Package, Comparator Type, Logic Compatibility, Output Type, Differential Input Voltage Range.
LM339PWR
✅ 直接替換聯絡詢價
查看資料表 →LM339PWRG4
✅ 直接替換聯絡詢價
查看資料表 →LM339PWRG3
✅ 直接替換聯絡詢價
查看資料表 →LM339APWR
✅ 直接替換📋 參考替代品（不在目錄中）
LM339B
✅ 直接替換📋 參考替代品（不在目錄中）
LM339PWRE4 最大額定值與電氣特性
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| Supply Voltage Range | 2 V to 36 V |
| Maximum Rated Differential Input Voltage | ±38 V |
| Common-Mode Input Range | Includes ground |
| Response Time | 300 ns |
| 輸出類型 | Open collector |
| Logic Compatibility | TTL, MOS, and CMOS |
| Maximum Rating | Up to 38 V |
| 封裝 | 14-pin TSSOP |
| 安裝類型 | Surface mount |
| ESD Rating HBM | 2 kV |
| RoHS 狀態 | Compliant |
| Lead-Free Finish | Yes, E4 suffix |
LM339PWRE4 14-pin tssop 腳位配置指南
LM339PWRE4（14-pin tssop 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： LM339PWRE4.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM339PWRE4 適用於 6 應用s: Battery Voltage Monitoring, Overvoltage and Undervoltage Detection, Industrial Sensor Threshold Conditioning, Window and Limit Comparator, TTL and CMOS Interface Logic, Relay and Solenoid Control.
Battery Voltage Monitoring
The LM339PWRE4 suits battery-powered systems that need threshold-based pack monitoring rather than continuous high-resolution measurement. Each open-collector comparator can compare a divided battery voltage with a reference, producing an alert when the pack crosses a defined limit. Its 2 V to 36 V operating capability accommodates multiple battery chemistries, while the common-mode input range including ground supports single-supply sensing near 0 V. The external pull-up resistor sets the alert logic level and must be included in the quiescent-current budget. The 300 ns response time is more than adequate for ordinary pack protection because battery impedance and filtering usually dominate the actual transition time.
推薦
Overvoltage and Undervoltage Detection
Use the four channels of the LM339PWRE4 to implement compact overvoltage and undervoltage supervision for one or more supply rails. Resistor dividers scale each rail to the comparator input range, while internal or external references establish trip points. The quad configuration allows a single package to perform upper-limit, lower-limit, and additional rail checks. Texas Instruments identifies a differential input rating up to plus or minus 38 V and a common-mode range that includes ground. Open-collector outputs make it straightforward to combine fault indications through pull-up resistors, although each output's sink current and pull-up voltage must remain within the device limits.
推薦
Industrial Sensor Threshold Conditioning
The LM339PWRE4 can convert a conditioned analog sensor signal into a binary process-control event. A Wheatstone bridge, resistive sensor, or analog front end can drive the differential inputs, and the comparator switches when the signal crosses a set threshold. Differential sensing helps reject common-mode voltage present on long industrial wiring. With a 300 ns listed response time, the device is suitable for relatively slow threshold events such as level, proximity, or equipment-state detection. For noisy sensor nodes, add hysteresis around the reference and filter the sensor node rather than relying on the comparator alone to reject every transient.
推薦
Window and Limit Comparator
The LM339PWRE4 supports window-comparator designs in which two thresholds define an acceptable input band. One channel can indicate that the signal is below the lower limit, another can indicate that it is above the upper limit, and the external logic can combine those states into a valid-window output. The quad-device architecture provides spare channels for additional rails or fault signals. Open-collector outputs allow the two states to be wired together into a single collector node when required. Design the divider and reference network so both inputs remain inside the common-mode operating region, and include positive feedback when the application requires hysteresis to prevent chatter around a threshold.
推薦
TTL and CMOS Interface Logic
The LM339PWRE4 is useful when a sensing circuit must communicate with TTL, MOS, or CMOS logic. The open-collector output can be pulled up to the receiving logic rail, allowing one collector node to drive several compatible inputs. Texas Instruments specifically identifies TTL, MOS, and CMOS output compatibility for the LM339 family. Because an open collector can pull the node low but cannot actively drive it high, the pull-up voltage must match the intended logic domain and remain within the device's permitted output conditions. This architecture is especially helpful in systems that combine an analog threshold function with wired alarm, fault, or system-status signals.
推薦
Relay and Solenoid Control
The LM339PWRE4 can serve as the decision element in relay-driver or solenoid-control circuits. A comparator channel detects when a control signal crosses a threshold, while a separate transistor stage handles the higher current and inductive load. The open-collector output can directly initiate a transistor base or gate drive when the voltage and current requirements match. This isolates the comparator from the load and avoids asking the LM339 output to sink the full coil current. Include a flyback diode for inductive loads, maintain separation between the sensitive input node and switching current, and account for relay-coil transients when selecting the transistor and grounding strategy.
推薦
推薦產品摘要
工程參考資料，適用於 LM339PWRE4 — 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 | LM339PWR | LM339PWRG4 | LM339PWRG3 | LM339APWR | LM339B |
|---|---|---|---|---|---|---|
| Package | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP configuration |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Comparator Configuration | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator |
| Output Type | Open collector | Open collector | Open collector | Open collector | Open collector | Open collector |
主要差異化特點
- Four comparator channels in one package (對比TLV2402ID)
- Single- and dual-supply operation (對比LM339PWR)
- Wide differential input capability (對比LM339PWRG4)
- RoHS-compliant E4 lead-free configuration (對比LM339PWRG3)
設計說明
Select the pull-up supply and resistor for the open-collector output rather than treating the high output as actively driven. Estimate: pull-up current is Vpull-up divided by Rpull-up, and the comparator dissipation also rises while the output transistor sinks current. For a 5 V pull-up and 10 kΩ resistor, the logic-node current is 0.5 mA when low. Confirm that the selected resistor, pull-up rail, and output sink-current limit all meet the application requirements.
Place the input resistors, reference components, and output pull-up resistors close to their associated LM339PWRE4 pins. Keep the two inputs of a channel short and avoid routing them beside relay-coil, motor, or switching-power-supply paths. A common-mode signal may be present on both inputs, so physical proximity between the paired inputs helps preserve differential noise rejection. Use a ground plane and return switching currents directly to their source without crossing the comparator input area.
Do not substitute the open-collector LM339 for a push-pull comparator without checking the downstream circuit. The open-collector node requires a pull-up and can rise slowly when capacitance is high, while an active push-pull output provides faster edges. Also verify the common-mode range near ground, the maximum differential input voltage, and the total rail span in dual-supply designs. For noisy thresholds, add controlled hysteresis instead of depending on input offset or noise performance alone.
Use a Schmitt-trigger action when the compared signal can change slowly or contain noise near the threshold. Positive feedback from the output to the non-inverting input creates hysteresis and prevents repeated output transitions, but it changes the effective trip point. Keep the hysteresis resistor sufficiently large to avoid loading the output node, and calculate the two switching thresholds from the resistor divider and reference voltage before finalizing the layout.
合規資訊
The LM339PWRE4 E4 suffix is identified as RoHS-compliant and lead-free with a NiPdAu finish. The E4 variant is not described as having the stricter G-series halogen-free certification.
