LM339DTBR2 - 4-Channel Open-Collector Comparator | onsemi
MPN： LM339DTBR2 ✓ 啟用中LM339DTBR2 概覽
A comparator is an analog semiconductor that compares one voltage with another and changes its output state when the differential input crosses a selected threshold. The LM339 family belongs to the comparator hierarchy within integrated circuits, where each independent channel can monitor an input voltage against a reference or another signal. Open-collector outputs provide wired-AND behavior when several channels pull up a common bus.
The device provides four comparison channels, a wide 2 V to 36 V single-supply operating range, and CMOS input characteristics combined with TTL-compatible outputs. The open-collector architecture allows the output pull-up voltage and current to be selected externally. This makes the LM339 adaptable to transistor-driven relays, open-drain buses, and systems that require multiple low- or high-side signaling nodes.
Each channel includes independent inverting and non-inverting inputs, allowing threshold inversion without changing the surrounding circuit. Open-collector outputs remain in a high-impedance state when the comparator does not actively pull the node low, so external pull-up resistors establish the inactive voltage. This architecture is useful when several comparator channels share a bus or when the output must interface with a supply domain different from the comparator supply.
Typical uses include industrial sensor thresholding, battery and power-supply monitoring, window-comparator functions, control-system interlocks, and general-purpose logic interfaces. The 14-TSSOP package reduces board area compared with a through-hole DIP implementation, while the four-channel integration reduces the number of discrete comparator packages required for multi-signal designs.
When designing with the LM339DTBR2, use the manufacturer pin-description table to assign every input, output, supply, and ground connection. Place pull-up resistors close to the open-collector outputs, keep input and return paths short, and ensure that the selected pull-up voltage and sink current remain within the applicable electrical limits. This page combines device specifications, verified replacement information, comparison guidance, and practical design notes for faster component selection.
直接替換替代品，適用於 LM339DTBR2 — 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： LM339DTBR2 （相同外形與佔位） — 差異在於 Comparator Type, Output Compatibility.
LM339PWR
✅ 直接替換聯絡詢價
查看資料表 →LM339DTBR2 最大額定值與電氣特性
| Comparator Type | General-purpose differential comparator |
| Number of Channels | 4 channels |
| Supply Configuration | Single supply |
| Operating Supply Voltage Range | 2 V to 36 V |
| Input Technology | CMOS |
| 輸出類型 | Open-collector |
| Output Compatibility | TTL |
| 封裝 | 14-pin TSSOP |
| 安裝類型 | Surface mount |
| Shipping Format | Tape and reel |
| Channel Count | 4 independent comparators |
| Input Polarity | Inverting and non-inverting inputs |
LM339DTBR2 14-pin tssop 腳位配置指南
LM339DTBR2（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： LM339DTBR2.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM339DTBR2 適用於 6 應用s: Industrial Sensor Threshold Detection, Power-Supply and Battery Monitoring, Open-Drain Alarm and Indicator Bus, Window and Limit Comparator, Embedded Logic Interface, Motor and Relay Control Interface.
Industrial Sensor Threshold Detection
The LM339DTBR2 is suitable for industrial sensor interfaces that compare a variable analog signal with a fixed reference. Its four independent channels can monitor four separate thresholds within one 14-TSSOP package, while the 2 V to 36 V single-supply range supports compatibility with industrial control voltages. Each open-collector output can directly pull down an alarm, status indicator, or digital-input line when its inverting and non-inverting inputs cross the selected threshold. Because the outputs are open collector, a pull-up resistor must define the inactive high level. Confirm the common-mode input range, output sink current, and thermal limits against the onsemi LM339 datasheet before deploying the device in high-noise or safety-critical sensing systems.
推薦
Power-Supply and Battery Monitoring
The LM339DTBR2 can monitor multiple power rails or battery thresholds by comparing each sensing input against a reference voltage. Four channels reduce package count in systems that require overvoltage, undervoltage, or state-of-charge indication. Its broad 2 V to 36 V operating range covers many industrial and distributed-supply environments, while open-collector outputs allow each alarm to be pulled down or combined on a wired-AND status bus. External pull-ups should be selected to produce a valid logic-high voltage without exceeding the comparator's output rating. In a battery design, validate the common-mode input range at the lowest cell voltage and account for supply current, input bias, threshold tolerance, and any required hysteresis.
推薦
Open-Drain Alarm and Indicator Bus
The LM339DTBR2 is well suited to shared alarm and indicator buses because its four open-collector outputs can each pull a common node low while otherwise presenting a high-impedance state. This enables wired-AND signaling without requiring a dedicated bus transceiver. The 14-TSSOP package supports compact surface-mount control boards, and the 2 V to 36 V supply range allows operation from a range of industrial rails. Each indicator node needs a pull-up resistor sized for the desired rise time and load current. Confirm that the pull-up voltage and the aggregate sink current remain within the LM339 electrical limits, and account for faults in which several channels assert simultaneously when sizing the shared node.
推薦
Window and Limit Comparator
The LM339DTBR2 can implement upper and lower window limits by assigning two channels to a measured signal and its reference. Its independent inverting and non-inverting inputs make threshold polarity configurable, while open-collector outputs can independently drive a relay driver, logic gate, or fault input. The quad-channel integration is useful when the monitored quantity has both high and low acceptable limits and when two additional channels handle auxiliary conditions. A 14-TSSOP layout reduces component count compared with four separate comparator packages. Add positive feedback or external hysteresis where required to prevent chatter around the threshold, and verify the input offset, common-mode range, and propagation behavior in the onsemi LM339 datasheet for the actual operating conditions.
推薦
Embedded Logic Interface
The LM339DTBR2 provides a practical interface between analog conditions and microcontroller or programmable-logic inputs. Four channels can convert temperature, position, voltage, or timing signals into active-low digital events, and the TTL-compatible output levels support direct interfacing with many 5 V digital systems. The open-collector architecture is particularly useful when the system also needs to drive a relay, optocoupler, or shared fault line rather than only a CMOS input. Place the device near the protected analog circuitry, route its ground with the sensed-signal return, and use a pull-up matched to the receiving logic. Verify the logic thresholds, output sink current, and supply arrangement for the specific host controller to avoid an input-overdrive or contention condition.
推薦
Motor and Relay Control Interface
The LM339DTBR2 can serve as the decision stage between sensing circuitry and a relay, solenoid, or motor-control interface. A comparator channel determines whether a measured signal has crossed its limit, and the open-collector output provides a current-sinking output suitable for an appropriately designed transistor or driver stage. Using four channels allows multiple interlocks or direction and limit conditions to be evaluated in one package. The 2 V to 36 V operating range supports control systems with a range of industrial supply voltages, but the output itself must not be assumed to drive a relay coil directly. Verify coil voltage, transistor dissipation, flyback protection, isolation needs, and logic polarity before finalizing the interface.
推薦
推薦產品摘要
工程參考資料，適用於 LM339DTBR2 — 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 | LM339PW | LM339PWG4 |
|---|---|---|---|---|
| Brand | onsemi | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Comparator Channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Operating Supply Voltage Range | 2 V to 36 V | 2 V to 36 V | 2 V to 36 V | 2 V to 36 V |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector |
| Output Logic Compatibility | TTL | TTL | TTL | TTL |
主要差異化特點
- Four comparator channels in one 14-TSSOP package (對比LM339PWR)
- Wide single-supply operating range (對比LM339PW)
- Open-collector interface with TTL-compatible levels (對比LM339PWG4)
設計說明
Place each output pull-up resistor close to the corresponding LM339DTBR2 output so that switching transients and capacitive charging currents remain localized. Route the device ground directly to the circuit ground reference, and keep the inverting and non-inverting input traces short and away from high-current switching nodes. Although the package uses four independent channels, shared supply inductance can couple disturbance across channels; use a solid ground plane and place the normal input, output, and bypass capacitors according to the manufacturer application guidance.
Do not treat the open-collector output as a push-pull CMOS output. Each active-low output requires an external pull-up resistor, and its high state is present only while the output transistor is off. Select the resistor to balance output rise time against sink current, then confirm that multiple simultaneously asserted channels can share the same pull-up node without exceeding the device's specified sink-current limit. Also maintain the input common-mode range; the 2 V to 36 V supply capability does not imply that every input voltage is valid.
For threshold switching near the input offset or noise floor, use clean reference generation and consider positive feedback for hysteresis. Decouple the supply locally, connect the comparator ground to the same reference used by the sensed signal, and keep pull-up return current out of sensitive input paths. Slow pull-up edges can increase switching time and susceptibility to injected noise, while overly small resistors increase sink current and dynamic power. Validate the chosen values against propagation delay, load capacitance, and the application's noise margin.
Plan the LM339DTBR2 supply path for both low-voltage logic compatibility and industrial-level transients. The device supports a 2 V to 36 V operating range, but board-level protection, regulation, and decoupling must prevent the supply from exceeding the absolute maximum rating. If the comparator controls a relay, solenoid, or motor, use a separate transistor or driver stage rather than increasing the pull-up current beyond the comparator's output rating. Add appropriate flyback protection to inductive loads and account for its switching noise in the layout.
合規資訊
Compliance attributes could not be confirmed from the cited product and comparison pages. Confirm RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification status with onsemi for the exact LM339DTBR2 order code before production release.
