LM339PWRE4 - Quad 36V Differential Comparator | Texas Instruments
MPN: LM339PWRE4 ✓ Hoạt độngLM339PWRE4 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho LM339PWRE4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM339PWRE4 (cùng hình factor và footprint) — khác nhau ở Package, Comparator Type, Logic Compatibility, Output Type, Differential Input Voltage Range.
LM339PWR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM339PWRG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM339PWRG3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM339APWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM339B
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM339PWRE4 Tỷ lệ tối đa & tính chất điện
| 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 |
| Kiểu đầu ra | Open collector |
| Logic Compatibility | TTL, MOS, and CMOS |
| Maximum Rating | Up to 38 V |
| Hộp | 14-pin TSSOP |
| Kiểu lắp đặt | Surface mount |
| ESD Rating HBM | 2 kV |
| Trạng thái RoHS | Compliant |
| Lead-Free Finish | Yes, E4 suffix |
Hướng dẫn cấu hình chân LM339PWRE4 14-pin tssop
Cấu hình chân cho LM339PWRE4 (14-pin tssop gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM339PWRE4.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM339PWRE4 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM339PWRE4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Four comparator channels in one package (vsTLV2402ID)
- Single- and dual-supply operation (vsLM339PWR)
- Wide differential input capability (vsLM339PWRG4)
- RoHS-compliant E4 lead-free configuration (vsLM339PWRG3)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
