LM293N - Dual Open-Collector Comparator, 8-DIP | STMicroelectronics
N.º de pieza: LM293N ✗ Fin de vida| Cant. | Precio unitario | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
LM293N Descripción general
A voltage comparator is an analog semiconductor that compares two input voltages and produces a logic-level indication of their relationship. The LM293N contains two independent comparators, allowing one package to implement threshold detection, window comparison, free-running oscillator, or simple analog-to-logic conversion. Within the broader hierarchy, it is a comparator IC, then an analog integrated circuit, and finally a semiconductor. Its open-collector outputs can sink external current and normally require a pull-up resistor when the design expects a high-level output.
The primary documented feature is its ability to operate from a single supply over a wide range of voltages, with split-supply operation also supported. The two independent channels provide design flexibility for comparing a sensor against a reference, checking a power rail, or generating complementary decisions in control circuitry. The open-collector architecture can support wired logic and level translation, but the external pull-up, output current, propagation delay, and input common-mode limits must be checked against the actual datasheet.
LM293N is suitable for industrial control, instrumentation, power-supply supervision, sensor interfaces, and embedded threshold detection. In a single-supply circuit, place the input network so that the signal remains within the device's verified common-mode range. In a split-supply circuit, confirm the positive and negative rail limits and the permitted total voltage. Because the provided data does not state absolute maximum ratings, supply voltage, input offset, output-current capability, response time, or operating temperature, those values should not be assumed.
Design practice should include a local bypass capacitor, a defined pull-up resistor for each open-collector output, and protection for exposed sensor inputs. Avoid relying on an output high level until the pull-up network and downstream load have been analyzed. Verify input polarity, output inversion, hysteresis, and logic compatibility with the system controller. The 8-DIP package is mechanically important: use the manufacturer pinout and maintain adequate lead spacing during assembly.
This page combines the verified LM293N product identity, package information, application context, datasheet links, and engineering considerations. It intentionally does not fabricate electrical ratings, pricing, lifecycle claims, or unreported pin names; obtain the current manufacturer datasheet and distributor quotation for production decisions.
Alternativas directas para LM293N — 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 LM293N (mismo factor de forma y huella) — difiere en Package, Output Type, RoHS Status, Comparator Type, Common-Mode Input Range.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
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Ver hoja de datos →LM339N
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Ver hoja de datos →LM293N Valores máximos y características eléctricas
| Comparator Configuration | Dual independent comparator |
| Number of Channels | 2 channels |
| Tipo de salida | Open-collector |
| Supply Configuration | Single supply or split power supplies |
| Input Function | Differential voltage comparison |
| Encapsulado | 8-DIP |
| Tipo de montaje | Through-hole |
| Logic Compatibility | External pull-up required for open-collector output |
| Estado RoHS | unknown |
| REACH Status | unknown |
Guía de configuración de pines de LM293N 8-dip
Configuración de pines para LM293N (encapsulado 8-dip). 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 LM293N.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LM293N es adecuado para 6 aplicacións: Industrial Threshold Detection, Power-Supply Supervision, Sensor Interface and Conditioning, Battery and Automotive Monitoring, Relay and Actuator Decision Logic, Simple Window Comparator.
Industrial Threshold Detection
The LM293N fits industrial threshold-detection circuits because it provides two independent comparators for monitoring two sensor or supply conditions in one 8-DIP package. Each channel can compare an input signal with a reference and produce a pulled-up logic indication for a controller. The verified data confirms single- or split-supply use, but the actual common-mode range, supply limits, offset, and response time must come from the manufacturer datasheet. Add input filtering for noisy industrial signals and select a pull-up resistor based on the controller input current and required transition speed.
Recomendado
Power-Supply Supervision
LM293N can supervise a power rail when two independent comparison channels are useful for detecting an upper or lower threshold, or for combining two supervisory events into a system status input. Its single-supply operation is suitable conceptually for comparator-based monitoring, while split-supply operation supports bipolar sensing arrangements. The pull-up output should be selected to match the supervisor input. Before deployment, verify the device's absolute maximum supply voltage, input common-mode limits, input offset, output sink current, and behavior during startup or supply droop.
Recomendado
Sensor Interface and Conditioning
The two independent LM293N channels are useful when a sensor needs separate high-limit and low-limit decisions, allowing a controller to receive a simple pulled-up status rather than processing the analog signal directly. Place the sensor and reference network close enough to control noise, then confirm that the sensor voltage remains inside the comparator's verified common-mode range. Hysteresis or positive feedback can help prevent chatter when the signal crosses the threshold, but resistor values and timing must be calculated from the actual datasheet characteristics and system noise requirements.
Recomendado
Battery and Automotive Monitoring
LM293N can support battery or vehicle monitoring functions when its supply and input ratings match the system voltage and transient environment. The dual-channel architecture can compare two battery thresholds or combine a voltage condition with another status signal. Automotive use requires checking transient immunity, temperature grade, and manufacturer qualification rather than assuming that a generic 8-DIP comparator is suitable. The provided data does not state automotive qualification or absolute maximum ratings, so those items must be verified before a vehicle design is released.
Recomendado
Relay and Actuator Decision Logic
LM293N can drive decision logic for relays, solenoid controls, or actuator enable signals when the downstream interface accepts an open-collector pull-up and the comparator's verified sink-current capability is adequate. The output should not be assumed to source actuator current directly; use a suitable driver stage and protection network. Keep sensitive comparator traces away from relay-coil wiring, add flyback protection where required, and verify that the output-low voltage remains valid at the maximum coil or load current.
Recomendado
Simple Window Comparator
Both LM293N channels can be combined to form a window or range detector, with one channel establishing the lower threshold and the other establishing the upper threshold. The controller can then determine whether the monitored voltage lies within the permitted interval. This application benefits from the package's two independent channels, but logic inversion and output states must be checked carefully. Add hysteresis around each threshold and test startup, tolerance, and input-noise behavior. The verified data does not provide offset or delay values, so threshold accuracy and response timing require datasheet-based calculations.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM293N — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM393N | LM2903N | LM2902N | LM2904N | LM339N |
|---|---|---|---|---|---|---|
| Comparator Configuration | Dual independent comparator | Dual comparator; exact family details require datasheet | Dual comparator; exact family details require datasheet | Dual comparator; exact family details require datasheet | Dual amplifier; comparator equivalence not verified | Quad comparator family; channel count differs |
| Package | 8-DIP | 8-DIP | 8-DIP | 8-DIP | 8-DIP | 8-DIP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
Diferenciadores clave
- Two independent comparator channels in one 8-DIP package (frente a LM339N)
- Single- or split-supply operating concept (frente a LM2903N)
- Open-collector interface for pulled-up logic (frente a LM2902N)
Notas de diseño
Because the verified data does not provide supply-voltage or current ratings, treat the supply limits as datasheet-controlled constraints rather than design assumptions. Confirm the maximum total supply voltage, input common-mode range, quiescent current, and output sink current before selecting rails or pull-up resistors. Add local supply bypassing near the device and check the capacitor voltage rating against the highest transient seen on the PCB.
Route the comparator input and reference nets away from switching nodes, relay-coil wiring, and high-current return paths. Keep the device ground connection short and connect the input bias or filter components close to the relevant pins. Because the supplied pinout is unavailable, use the manufacturer diagram for physical placement rather than inferring pin numbering from the DIP outline.
Do not leave the open-collector output without a defined pull-up unless the next stage intentionally uses wired-open logic. The resistor must satisfy the downstream input's current and capacitance requirements while keeping the output-low voltage within its specified limit. Also avoid assuming that a related LM393N or LM2903N is a drop-in replacement; verify pinout, supply range, common-mode range, offset, timing, and output current.
Información de cumplimiento
The supplied verified product and distributor pages do not provide reliable compliance statements for this exact ordering code.