LM339NSRG4 - Quad Open-Collector Comparator | Texas Instruments
N.º de pieza: LM339NSRG4 ✓ ActivoLM339NSRG4 Descripción general
A voltage comparator is an analog interface IC that evaluates two input voltages and changes its output state when the difference between them crosses a defined threshold. The LM339 belongs to the broader comparator and signal-conditioning hierarchy, where its four channels can implement threshold detection, zero-crossing detection, window comparison, saturation sensing, and basic control decisions. Its multi-channel architecture also allows one package to monitor several independent conditions without requiring four separate comparator devices.
Key characteristics include operation from a single supply or from dual supplies, a tested supply rating of 30 V for LM339 versions and up to 32 V for non-V devices, low supply-current drain that is independent of supply voltage, and a typical supply-current drain of 0.8 mA. The open-collector output architecture requires an external pull-up, providing flexibility in output voltage and bus-level compatibility. The four channels share supply pins but otherwise retain independent input and output connections.
The LM339 architecture is suited to low-cost analog decision circuits because its inputs respond to a wide common-mode range while the open-collector outputs remain electrically flexible. Because bipolar comparators can draw input bias current, source impedance should be limited where offset errors matter. Open-collector outputs can also expose the output node to more than one driver, so wired-AND logic requires careful pull-up selection and a review of output sink-current limits before several comparators share a node.
Typical uses include industrial sensor interfaces, overvoltage and undervoltage monitors, temperature-threshold circuits, motor-control interfaces, power-supply supervision, and general industrial control systems. It is particularly useful when several independent comparisons must be performed within a limited board area and a 14-pin surface-mount footprint is preferred over through-hole DIP packaging.
When designing around the LM339NSRG4, include a pull-up resistor on every open-collector output, keep input common-mode voltage within the device operating limits, and account for input bias current when using high-impedance sensors. Place bypass capacitance close to the supply pins and route sensitive comparison inputs away from switching nodes and high-current return paths.
This page organizes the LM339NSRG4’s key electrical characteristics, application guidance, pin-level information, and carefully qualified replacement options. It is intended to help engineers confirm footprint compatibility, assess threshold accuracy and response time, and plan the external components required by an open-collector comparator design.
Alternativas directas para LM339NSRG4 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
LM339DBR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM339NSLE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM339NSRG4 Valores máximos y características eléctricas
| Comparator Type | Quad differential voltage comparator |
| Number of Channels | 4 channels |
| Supply Configuration | Single supply or dual supply |
| Tested Maximum Supply Voltage | 30 V |
| Maximum Supply Voltage for Non-V Devices | 32 V |
| Typical Supply-Current Drain | 0.8 mA |
| Supply-Current Drain Dependence | Independent of supply voltage |
| Maximum Input Offset Voltage | 9 mV |
| Typical Response Time | 1300 ns |
| Tipo de salida | Open-collector |
| Encapsulado | 14-pin SOIC, PDSO14 |
| Número de pines | 14 pins |
| Tipo de montaje | Surface mount |
| Application Category | General-purpose comparator |
Configuración de pines de LM339NSRG4
| Pin 1 | OUT 1 — Open-collector output for comparator channel 1 |
| Pin 2 | IN 1- — Inverting input for comparator channel 1 |
| Pin 3 | IN 1+ — Noninverting input for comparator channel 1 |
| Pin 4 | GND — Ground connection |
| Pin 5 | IN 2+ — Noninverting input for comparator channel 2 |
| Pin 6 | IN 2- — Inverting input for comparator channel 2 |
| Pin 7 | OUT 2 — Open-collector output for comparator channel 2 |
| Pin 8 | OUT 3 — Open-collector output for comparator channel 3 |
| Pin 9 | IN 3- — Inverting input for comparator channel 3 |
| Pin 10 | IN 3+ — Noninverting input for comparator channel 3 |
| Pin 11 | GND — Ground connection |
| Pin 12 | IN 4+ — Noninverting input for comparator channel 4 |
| Pin 13 | IN 4- — Inverting input for comparator channel 4 |
| Pin 14 | OUT 4 — Open-collector output for comparator channel 4 |
Aplicaciones típicas
LM339NSRG4 es adecuado para 6 aplicacións: Industrial Overvoltage and Undervoltage Monitoring, Temperature Sensor Threshold Detection, Motor Drive and Control Interfaces, Power-Supply Rail Supervision, Window and Limit Comparators, Sensor Signal Conditioning.
Industrial Overvoltage and Undervoltage Monitoring
The LM339NSRG4 fits multi-rail supervision because four independent differential channels can compare separate monitored voltages with individual reference thresholds in one 14-pin SOIC package. Its 9 mV maximum input offset voltage supports reasonably precise threshold decisions, while the 1300 ns typical response time is adequate for ordinary protection circuits. Open-collector outputs can pull up a supervisor, alarm input, relay-control stage, or fault latch. The design must include a pull-up on every output and must keep the sensed voltages within the comparator’s specified common-mode range. Resistor-divider tolerances and input bias current should also be included in the threshold-error budget.
Recomendado
Temperature Sensor Threshold Detection
The LM339NSRG4 can compare a resistive temperature-sensor signal against one or more reference levels for independent high- and low-temperature alarms. Each comparator channel provides a differential input pair, while the open-collector output can directly drive a pulled-up alarm or digital status line. The 9 mV maximum offset voltage helps keep the decision boundary predictable when divider and sensor resistances are selected carefully. Bias the sensor network to the comparator’s common-mode range, limit input source impedance where offset errors are significant, and verify the 1300 ns response time against the required thermal-update interval.
Recomendado
Motor Drive and Control Interfaces
The LM339NSRG4 is suitable for motor-control subsystems that require several inexpensive threshold decisions before actuating a gate driver, relay, or protection circuit. Its four channels can monitor current-sense, speed, position, or enable conditions, and the open-collector outputs support wired fault signals with external pull-up resistors. The typical response time of 1300 ns is appropriate for many slow supervisory functions but may require additional analysis for high-switching-frequency motor loops. Sense-node design must prevent the comparator inputs from exceeding the allowed common-mode range, especially during fast transitions.
Recomendado
Power-Supply Rail Supervision
The LM339NSRG4 can supervise multiple power rails because four differential comparator sections fit within one 14-pin SOIC package. Each channel can evaluate a divided rail voltage against a reference and report a fault through an open-collector output. Its tested 30 V supply capability supports monitoring of higher-voltage systems when the common-mode and input ratings are respected. Designers should account for divider tolerance, comparator offset, input bias current, and pull-up timing. This arrangement reduces component count compared with using four single comparators, while preserving independent fault outputs for enable, reset, and alarm signaling.
Recomendado
Window and Limit Comparators
The LM339NSRG4 can implement upper-limit, lower-limit, and window decisions by assigning separate comparator channels to threshold references and sensed signals. A 9 mV maximum offset voltage is important when the application requires repeatable limit crossings, while the 1300 ns typical response time provides prompt state changes for many control systems. Open-collector outputs can be pulled up to the logic voltage used by a controller and, where supported, combined for a wired-AND fault indication. Verify input common-mode limits, output sink-current requirements, and pull-up rise time before using several outputs on the same node.
Recomendado
Sensor Signal Conditioning
The LM339NSRG4 can convert analog sensor conditions into digital decisions when a reference level and hysteresis are more appropriate than amplification. Four channels support multiple discrete sensor inputs, such as limit switches, level probes, or resistive dividers, without adding four separate packages. The open-collector stage permits flexible pull-up voltage and interfacing to logic, while the 9 mV maximum offset voltage helps preserve threshold precision. Designers should keep high-impedance input traces short, use a defined reference network, and account for input bias current so leakage or sensor resistance does not shift the comparison point.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM339NSRG4 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM339DBR | LM339NSLE |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC (PDSO14) | 14-pin SOIC | 14-pin SOIC |
| Comparator Type | Quad differential comparator | Quad differential comparator | Quad differential comparator |
| Number of Channels | 4 channels | 4 channels | 4 channels |
| Output Type | Open-collector | Open-collector | Open-collector |
| Supply Configuration | Single supply or dual supply | Single supply or dual supply | Single supply or dual supply |
Diferenciadores clave
- Four independent differential channels in one compact package (frente a LM339DBR)
- Documented 9 mV maximum offset and 1300 ns typical response time (frente a LM339NSLE)
- Open-collector outputs support flexible pull-up voltage and wired logic (frente a TS339)
Notas de diseño
Fit an external pull-up resistor on every LM339NSRG4 output because the open-collector stage can sink current but cannot source the high state. Select the resistor to satisfy the required rise time, bus capacitance, and available output sink current. If multiple outputs are wired together, confirm that the aggregate sink current remains within the device limit and that the pull-up voltage is appropriate for every connected node.
Account for input bias current and source impedance when the LM339NSRG4 monitors a high-impedance sensor. The 9 mV maximum offset voltage can be comparable to the threshold error introduced by a large sensor resistance and divider network. Use reasonably low source impedances, keep the input and reference traces short, and route them away from switching-node copper and high-current return paths.
The LM339NSRG4 can operate from a single supply or dual supplies, but the selected rail voltages must satisfy both the 30 V tested supply capability and the input common-mode limits. The typical supply-current drain is 0.8 mA and is independent of supply voltage according to the manufacturer datasheet. Place supply bypass capacitance close to the device and include the comparator’s input bias current and output pull-up current in the total power budget.
Assign the two GND pins according to the pin-description table in the manufacturer datasheet and connect them to a low-impedance ground plane. Keep the input pairs compact and symmetrical where possible to reduce sensitivity to differential noise. Because the part is intended for surface mounting, verify pad geometry and tape-and-reel orientation against the exact ordering suffix before releasing the PCB or placing a replacement order.
Información de cumplimiento
No definitive LM339NSRG4 compliance declarations were identified in the cited part snippets. The comparison reference mentions RoHS and REACH status for LM339ADR versus LM339NSRG4, but the accessible result does not provide the underlying declarations, so no compliance conclusion is inferred.
