LM339NE3 - 36V Quad Open-Collector Comparator | Texas Instruments
MPN： LM339NE3 ✓ 啟用中LM339NE3 概覽
A comparator is an analog interface IC that compares two input voltages and produces a logic-level indication of their relationship. The LM339 belongs to the broader comparator hierarchy and operates as a general-purpose signal-conditioning component between sensor, reference, and digital-control stages. Its common-mode input range includes ground, allowing the device to monitor signals referenced to a negative rail in dual-supply systems.
Four independent comparators are integrated into one package, reducing component count on boards that require multiple threshold or window-detection functions. The open-collector output architecture can sink logic-level current while normally leaving the output transistor off, which supports wired-AND behavior when several outputs share a pull-up resistor. The output stage is compatible with TTL, MOS, and CMOS logic according to the manufacturer product information.
The low 200 µA supply current per comparator supports low-power monitoring systems, while the 1 µs response time provides useful speed for supply sequencing, overvoltage detection, and fast control loops. Input offset voltage determines how close the two inputs must be before the output changes state, while input bias current affects the impedance presented to the sensing circuit. The common-mode range and differential input limits must both be checked in high-voltage systems.
Typical uses include battery monitoring, power-supply sequencing, overvoltage and undervoltage detection, window comparators, sensor thresholding, relay-control logic, and industrial control systems. The open-collector outputs are particularly useful when multiple detector channels must indicate one combined fault condition. A suitable pull-up resistor is required for normal digital-logic operation because the outputs do not actively drive a high voltage.
For reliable PCB design, keep input traces away from switching-power nodes, place the pull-up resistor close to the open-collector output, and decouple the supply connection locally. Designers should verify input and output limits under worst-case supply, temperature, and common-mode conditions. The DIP package is suitable for through-hole assembly, prototyping, and applications that favor easy inspection or manual replacement.
This product page combines the manufacturer electrical characteristics, package information, application guidance, drop-in alternatives, and practical design notes to support component selection, PCB implementation, and lifecycle-aware purchasing decisions.
直接替換替代品，適用於 LM339NE3 — 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： LM339NE3 （相同外形與佔位） — 差異在於 Comparator Type, Package, Logic Compatibility, Number of Channels, Mounting Type.
LM239N
✅ 直接替換聯絡詢價
查看資料表 →LM2901N
✅ 直接替換聯絡詢價
查看資料表 →LM339NE3 最大額定值與電氣特性
| Comparator Type | Differential, general-purpose |
| Number of Elements | 4 comparators |
| Single-Supply Voltage Range | 2 V to 36 V |
| Dual-Supply Voltage Range | ±1 V to ±18 V |
| 輸出類型 | Open-collector |
| Low Input Offset Voltage | 0.37 mV |
| Low Input Bias Current | 3.5 nA |
| 供應電流 | 200 µA per comparator |
| Response Time | 1 µs |
| ESD Rating | 2 kV HBM |
| Maximum Rated Supply Voltage | 38 V |
| Common-Mode Input Range | Includes ground |
| Differential Input Voltage Range | ±38 V |
| Logic Compatibility | TTL, MOS, and CMOS |
| 封裝 | 14-PDIP, 0.300 inch pitch, 7.62 mm |
| 安裝類型 | Through-hole |
| Packaging | Tube |
LM339NE3 14-pdip, 0.300 inch pitch, 7.62 mm 腳位配置指南
LM339NE3（14-pdip, 0.300 inch pitch, 7.62 mm 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： LM339NE3.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM339NE3 適用於 6 應用s: Battery Voltage Monitoring, Industrial Overvoltage Protection, Power-Supply Sequencing, Sensor Threshold Detection, Window Comparator, Relay and Latch Control.
Battery Voltage Monitoring
The LM339NE3 fits battery-pack monitoring because each comparator can compare a divided cell voltage against a precise reference or another divided rail. Its 0.37 mV low input offset helps reduce threshold error, while 3.5 nA input bias current limits loading on high-impedance dividers. The 1 µs response time supports rapid overvoltage or undervoltage detection. In a multi-cell pack, four channels can monitor individual thresholds or implement window comparisons. Because the outputs are open collector, separate pull-up resistors can establish local logic levels, and multiple fault outputs can share a bus when the combined sink current remains within limits. The sensing nodes must stay within the common-mode and differential input ranges.
Industrial Overvoltage Protection
The LM339NE3 is appropriate for industrial overvoltage and undervoltage protection because it combines four differential channels with a 2 V to 36 V single-supply range. Each channel can compare a scaled power rail with a reference and produce a fault signal when the threshold is crossed. Its 1 µs response time helps minimize the interval between fault detection and control action, while the low 200 µA supply current per comparator limits overhead in distributed monitoring circuits. The open-collector outputs can drive discrete protection hardware or a common fault input with a suitable pull-up arrangement. Engineers must verify the common-mode voltage, input transients, output sink current, and isolation requirements under industrial fault conditions.
Power-Supply Sequencing
The LM339NE3 can supervise multiple supply rails in a power-sequencing circuit by comparing divided rail voltages against references derived from earlier stages. The four integrated channels reduce the number of discrete components needed for rail-order control, and the 1 µs response time allows sequencing decisions to follow supply ramps closely. Its common-mode range including ground is useful for the first rail in a negative or ground-referenced monitoring chain. The open-collector outputs support wired-AND fault collection or individual enable requests when paired with pull-up resistors. Timing capacitors and threshold networks must be selected from the manufacturer application guidance, and designers should test startup, fault, and discharge behavior across supply tolerances.
Sensor Threshold Detection
The LM339NE3 suits low-frequency sensor thresholding where a signal must be converted into a logic decision without the noise of an amplifying analog chain. Its 0.37 mV offset and 3.5 nA bias current can improve threshold accuracy in high-impedance sensor circuits, while four channels allow multiple temperature, pressure, or level thresholds on one board. The 1 µs response time is sufficient for many industrial and consumer monitoring loops that are not limited by high-speed propagation. Use the common-mode range to determine whether resistive dividers or level shifting are needed, and place the sensing paths away from switching nodes. The output pull-up voltage and sink current should match the logic family connected to each open-collector pin.
Window Comparator
The LM339NE3 can implement two-channel window-comparison functions using pairs of differential comparators referenced to upper and lower thresholds. This arrangement is useful for detecting when a measured voltage is neither too low nor too high. The low input offset voltage helps narrow the decision band around the reference thresholds, and the four available channels leave flexibility for two complete windows. Open-collector outputs can be combined through a shared pull-up to indicate an out-of-range condition, although the logic truth table must account for the inverted nature of comparator outputs. Reference accuracy, divider tolerance, input offset, propagation delay, and supply drift determine the practical window width, so each element should be included in worst-case error analysis.
Relay and Latch Control
The LM339NE3 can control relay drivers, alarm latches, and discrete logic stages by converting an analog threshold into an open-collector output. The output can sink the current required by a compatible driver stage while an external pull-up determines the inactive logic level. Four independent channels support multiple threshold events, and the 1 µs response time provides prompt action for protection and interlock circuits. For relay systems, the pull-up and driver transistor must be sized for coil-interface requirements, while the comparator supply should be decoupled near the device. Confirm the output sink rating, input signal limits, and isolation strategy before using the LM339NE3 where the controlled voltage or current exceeds the device's stated conditions.
工程參考資料，適用於 LM339NE3 — 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 | LM239N | LM2901N | LM339N | LM339N |
|---|---|---|---|---|---|
| Package | 14-PDIP (0.300 inch, 7.62 mm) | 14-PDIP (0.300 inch, 7.62 mm) | 14-PDIP (0.300 inch, 7.62 mm) | 14-PDIP (0.300 inch, 7.62 mm) | 14-PDIP (0.300 inch, 7.62 mm) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | Raytheon Semiconductor |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector |
主要差異化特點
- Four independent threshold-detection channels in one through-hole package (對比LM239N)
- Low 3.5 nA input bias current supports high-impedance sensing (對比LM339N)
- Fast 1 µs response for protection and sequencing loops (對比LM2901N)
設計說明
Place each open-collector pull-up resistor close to the corresponding LM339NE3 output to minimize trace inductance and coupling into adjacent sensing lines. Connect the device supply and ground pins to a low-impedance plane or short routed path, and place local bypass capacitance at the supply pins. Keep comparator input traces away from relay coils, switching inductors, and power-converter nodes. The through-hole package provides ample routing space, but input paths should still avoid parallel runs with high-current outputs.
Do not treat the open-collector output as a push-pull logic output. A pull-up resistor is required to establish the high voltage, and its value must satisfy the input current of the connected CMOS, MOS, or TTL load without exceeding the comparator's output sink capability. Also verify that every input remains within both the common-mode and differential limits. The input common-mode range includes ground, but that feature does not remove the need to check the positive input limit.
For low-level threshold detection, include the effects of input offset voltage, divider resistance, bias current, noise, and reference tolerance rather than relying on the nominal 0.37 mV offset alone. Keep the two inputs of a comparator on similar impedance levels when possible to reduce propagation-delay shifts caused by unequal bias-current effects. For switching applications, use hysteresis to prevent output chatter when the sensed signal crosses the threshold slowly.
Budget four channels at the manufacturer's stated 200 µA per comparator before adding input-divider and pull-up currents. A practical calculation is Estimated: 4 channels × 200 µA = 800 µA device supply current before external network loading. Select the pull-up to balance low supply current against rise-time requirements, and confirm that the pull-up voltage remains within the output and logic-system limits.
合規資訊
The manufacturer product information lists the LM339 family but does not explicitly state the compliance fields shown here. Confirm environmental declarations and automotive qualification status for the exact ordering code before production release.
