LM339D - 4-Comparator Open-Collector IC | Texas Instruments
N.º de pieza: LM339D ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
LM339D Descripción general
A voltage comparator is an analog comparator that evaluates two input voltages and changes its output state according to their relationship. The LM339 belongs to the comparator, analog IC, and signal-conditioning hierarchy. Unlike an op-amp configured for linear amplification, a comparator is intended for open-loop decision making. Its open-collector output requires an external pull-up resistor and can be wired with multiple comparator outputs when the electrical conditions permit.
The four independent channels allow one package to perform several threshold decisions. Open-collector outputs can interface with TTL, MOS, and CMOS-compatible circuits according to the family documentation, while the wide supply capability supports industrial and automotive-style environments. The low input bias current is useful when the comparator senses high-impedance sources, although input offset, common-mode range, output saturation, and supply limits must still be checked in the complete design.
The LM339 family is supported by TI’s application guidance for TL331, LM339, and LM393 devices, which emphasizes correct use of open-collector outputs, pull-up networks, input protection, and supply bypassing. The package and pin arrangement should be verified against the selected manufacturer’s datasheet before layout release, especially when replacing a part sourced from another manufacturer.
Typical applications include sensor threshold detection, battery or power-system monitoring, window comparator circuits, logic-level translation, relay or solenoid drive interfaces, and industrial control inputs. An external pull-up resistor is normally placed from each output to the downstream logic supply so that the open-collector transistor can pull the line low and release it high.
The main design consideration is that an open-collector output is not a push-pull logic output. Choose the pull-up voltage and resistor for the receiving device, verify output sink current, and account for the positive logic level at the receiver input. Place bypass capacitors close to the supply pins and keep sensitive input traces away from output and switching-current paths.
This product page consolidates verified distributor identity, manufacturer family specifications, package information, sourcing links, and engineering-oriented usage guidance. Exact pricing, stock, alternative parameter tables, and manufacturer-specific pin details remain dependent on the cited source pages and are not inferred where the supplied evidence is incomplete.
Alternativas directas para LM339D — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LM339D (mismo factor de forma y huella) — difiere en Package, Comparator Type, Logic Compatibility, Mounting Type, Response Time.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LM339BD
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM339N
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.38 / unidad
Ver hoja de datos →LM339DR
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.15 / unidad
Ver hoja de datos →LM339DT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LM339D
✓ En stock
Consulte el precio
Ver hoja de datos →LM339D Valores máximos y características eléctricas
| Comparator Count | 4 |
| Product Type | General-purpose differential voltage comparator |
| Tipo de salida | Open-collector |
| Supply Operation | Single or split supply |
| Maximum Rated Supply Voltage | Up to 38 V |
| Input Offset Voltage | 0.37 mV |
| Input Bias Current | 3.5 nA |
| Corriente de alimentación | 200 µA per comparator |
| Response Time | 1 µsec |
| ESD Rating HBM | 2 kV |
| Encapsulado | 14-pin SOIC |
| Logic Compatibility | TTL, MOS, and CMOS-compatible output |
Guía de configuración de pines de LM339D 14-pin soic
Configuración de pines para LM339D (encapsulado 14-pin soic). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para LM339D.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LM339D es adecuado para 6 aplicacións: Sensor Threshold Detection, Power-System Monitoring, Window and Limit Comparison, Industrial Logic Interfacing, Relay and Solenoid Control, Memory and Level Control.
Sensor Threshold Detection
LM339D fits low-level sensing when a sensor output must be translated into a digital decision. Its verified family data lists 3.5 nA input bias current, which helps avoid loading high-impedance sensor nodes, and 0.37 mV input offset voltage, which supports threshold placement near the signal level. Each of the four channels can compare a sensor input against a reference, while the open-collector output can pull up to the logic system’s supply. Add input clamping and verify the common-mode range before connecting the sensor.
Recomendado
Power-System Monitoring
LM339D can supervise battery, supply, or system rails by comparing divided voltages against references and producing open-collector fault signals. The family’s single or split supply capability and maximum rated voltage of up to 38 V provide flexibility in industrial monitoring designs, while 200 µA supply current per comparator supports low-power systems. The designer must confirm the exact input voltage limits and use resistor-divider values that keep signals inside the permitted operating range.
Recomendado
Window and Limit Comparison
LM339D is suitable for window detection because the device contains four independent differential comparators rather than a single shared input stage. Two channels can establish upper and lower thresholds around a signal, and the remaining channels can provide additional limit checks or fault flags. The open-collector outputs can be pulled up to a common fault bus when their logic states are compatible. Verify input common-mode limits and propagation behavior when the thresholds must respond accurately.
Recomendado
Industrial Logic Interfacing
LM339D can interface low-voltage or analog control signals with TTL, MOS, and CMOS-compatible logic through its open-collector outputs. The output transistor provides a controlled low state, while an external pull-up resistor establishes the high level required by the receiver. This architecture is useful for wired-OR fault signals and level-driven industrial interfaces, but the pull-up voltage and resistor must be selected to satisfy sink-current, rise-time, and receiver-input-current requirements.
Recomendado
Relay and Solenoid Control
LM339D can generate a low-side control signal for a relay driver, solenoid driver, or discrete transistor stage after comparing a control voltage with a reference. The open-collector output is naturally suited to pulling up a transistor base or gate resistor network, provided the pull-up rail and transistor arrangement are designed for the required current. Add flyback protection for inductive loads and verify the comparator’s output saturation and absolute maximum limits under worst-case supply conditions.
Recomendado
Memory and Level Control
LM339D is identified by its manufacturer-family documentation for memory applications and general level detection. Four channels can monitor address, threshold, or control signals and produce open-collector enables or alarms. The device’s low input bias current is useful when the sensing source has high impedance, but system timing depends on the external pull-up resistance, wiring capacitance, and the family response time of approximately 1 µsec. Validate the complete timing budget in the target logic system.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM339D — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM339BD | LM339N | LM339DR | LM339DT | STMicroelectronics LM339D |
|---|---|---|---|---|---|---|
| Comparator Count | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector | Open-collector |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-SO |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
Diferenciadores clave
- Four independent comparator channels in one package (frente a LM2904D)
- Open-collector output enables wired logic and level adaptation (frente a LM339BD)
- Single or split supply support for flexible threshold circuits (frente a STMicroelectronics LM339D)
Notas de diseño
Do not treat the open-collector output as a push-pull logic output. Fit a pull-up resistor from each output to the voltage required by the receiving logic, and verify the resistor against output sink current, receiver input current, and required rise time. The LM339 family can interface with TTL, MOS, and CMOS-compatible circuits, but the correct pull-up voltage and load must be confirmed for the specific receiver.
Place supply bypass capacitors close to the comparator supply pins and return the capacitor ground through a short, low-impedance path. The verified family information identifies single or split supply operation, so the bypass arrangement should be checked against the selected wiring topology. If using split supplies, verify input common-mode and output voltage limits before enabling the circuit; the available evidence does not provide every operating-limit value.
Keep the four comparator input nets away from output pull-up loops and unrelated switching paths. Input bias current and offset voltage determine the error seen by high-impedance sensing nodes, while long traces add coupling and capacitance. Use short comparator traces, a local ground reference, and defined test points. Because exact pin names and package mapping were not included in the supplied evidence, verify the selected manufacturer pinout before PCB release.
Información de cumplimiento
The supplied verified data does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for LM339D. Compliance should be confirmed using the selected manufacturer’s current documentation.
