LM219N - High-Speed Dual Comparator | STMicroelectronics
Référence : LM219N ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
LM219N Présentation
A voltage comparator is an analog integrated circuit that compares two input voltages and produces a digital logic state indicating which input is higher. In the broader semiconductor hierarchy, a comparator belongs to the linear and mixed-signal IC family and supports systems built around logic ICs, power management, signal conditioning, and control electronics. The LM219N’s dual-channel architecture lets one package perform two threshold decisions or operate as a window comparator.
Key verified features include low input currents, high gain, wide supply-voltage operation, and high-speed switching. The manufacturer's product page describes the LM219 family as precision high-speed dual comparators designed to operate from a single 5 V logic supply and ground. The distributor listing identifies the LM219N as having open-collector/open-emitter outputs and a 14-DIP package. Its comparator outputs can interface with TTL-compatible downstream logic when operated within the datasheet limits.
The LM219N is suited to pulse-width shaping, level detection, zero-crossing detection, industrial control, test equipment, and signal conditioning. The two independent channels provide flexibility for comparing a sensor signal against a reference or detecting upper and lower thresholds. Because it is a through-hole PDIP device, it is particularly useful for prototype boards, educational systems, legacy industrial equipment, and repair applications that require a standard 14-pin socket or plated-through-hole footprint.
Designers should verify supply polarity, input common-mode limits, output pull-up requirements, input overvoltage protection, and timing behavior against the manufacturer datasheet before applying the comparator. Open-collector outputs require an appropriate pull-up arrangement when a valid high-level output is needed. Input filtering and layout should minimize noise pickup around high-impedance comparison nodes, while bypassing supply pins close to the device helps preserve switching performance.
This page synthesizes verified manufacturer and distributor information, package details, application guidance, replacement qualification limits, and design notes. Because the supplied data does not provide complete numeric timing, temperature, output-current, or price tables, those fields are explicitly marked as data needed rather than estimated.
Alternatives de remplacement direct pour LM219N — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM219N (même facteur de forme et même empreinte) — différant par Output Type, Package, Product Type, Mounting Type, Logic Compatibility.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LM319N
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM219N Valeurs maximales et caractéristiques électriques
| Product Type | High-speed dual voltage comparator |
| Comparator Channels | 2 |
| Tension d'alimentation | Single +5 V to ±15 V |
| Type de sortie | Open-collector, open-emitter |
| Logic Compatibility | TTL |
| Boîtier | 14-pin PDIP |
| Type de montage | Through-hole |
| Input Current | Low input current |
| Voltage Gain | High gain |
| Typical Response Time | 80 ns |
Guide de configuration des broches du LM219N 14-pin pdip
Configuration des broches du LM219N (boîtier 14-pin pdip). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour LM219N.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LM219N convient pour 6 applications: TTL Logic-Level Detection, Window and Threshold Monitoring, Pulse-Width and Timing Control, Zero-Crossing Detection, Industrial Control and Alarm Systems, Test and Measurement Signal Conditioning.
TTL Logic-Level Detection
The LM219N fits TTL interface designs because the verified DigiKey listing identifies open-collector/open-emitter outputs and TTL compatibility. Use one comparator channel to convert a threshold decision into a logic-compatible signal, with a pull-up providing the high state when required. The dual-channel package can monitor two independent thresholds in a controller, alarm circuit, or digital interface. Because detailed output current and logic thresholds are not included in the supplied data, the pull-up value and operating margin must be selected from the manufacturer datasheet. Through-hole PDIP construction also makes the part convenient for prototype boards and legacy control systems.
Recommandé
Window and Threshold Monitoring
The LM219N's two independent comparator channels are useful for upper- and lower-threshold monitoring. One channel can compare a sensor or divided signal with a lower reference, while the other compares it with an upper reference. Their outputs can drive pull-ups, gates, or an alarm input to indicate whether the signal is inside or outside the permitted range. The architecture provides a compact dual-comparison solution in a 14-pin PDIP package. Exact reference accuracy, input common-mode limits, propagation delay, and output behavior must be confirmed in the complete manufacturer datasheet before setting production thresholds.
Recommandé
Pulse-Width and Timing Control
The LM219N is suitable for pulse-width, pulse-timing, and edge-detection circuits because the manufacturer describes the LM219 family as high-speed and low-input-current comparators. A reference voltage can be compared with a shaped pulse or ramp to produce a control signal. The open-collector output allows the circuit to drive a pull-up and support wired logic, while the dual package can compare complementary edges or generate complementary control events. The supplied data does not provide the complete LM219N timing limits, so pulse-width accuracy and maximum operating frequency should be calculated from the verified propagation-delay and output-transition characteristics.
Recommandé
Zero-Crossing Detection
The LM219N can support zero-crossing and sign-change detection when a bipolar or offset signal is compared with a reference near its crossing point. The low-input-current characteristic helps reduce loading of the signal source, and the open-collector output can feed a pull-up or external driver for downstream digital timing. A dual package allows the second channel to monitor a second crossing, provide hysteresis support, or supervise a second signal. Input common-mode range, slew behavior, and response timing are not supplied in the verified search excerpts and must be checked against the manufacturer datasheet for the chosen supply and signal amplitude.
Recommandé
Industrial Control and Alarm Systems
The LM219N can be used in industrial alarm and control circuits for overvoltage, undervoltage, or sensor-limit detection. Its dual-comparator organization reduces the number of packages needed when two limits must be checked, and the PDIP package supports through-hole maintenance designs. Open-collector outputs are useful for driving pull-ups, relay-driver stages, or logic inputs, provided the load and supply limits are verified. The verified material confirms the function and package but does not provide isolation ratings, surge limits, or industrial temperature specifications, so those requirements must be validated separately before use in safety-related equipment.
Recommandé
Test and Measurement Signal Conditioning
The LM219N is applicable in test equipment where an analog level must be converted into a digital event with predictable logic behavior. One channel can compare a measured node with a programmable or fixed threshold, while the other can provide a complementary or independent measurement. The open-collector/open-emitter output can drive instrument logic through a suitable pull-up, and the dual channel helps reduce board area. Because the supplied search data does not provide input-offset, noise, bandwidth, or common-mode values for LM219N, laboratory designs should verify those parameters and temperature behavior directly from the manufacturer datasheet.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM219N — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM319N |
|---|---|---|
| Package | 14-pin PDIP | 14-DIP |
| Brand | STMicroelectronics | Texas Instruments |
| Comparator Type | High-speed dual comparator | Dual high-speed comparator |
| Number of Channels | 2 | 2 |
| Supply Range | Single +5 V to ±15 V | Single +5 V to ±15 V |
| Output Type | Open-collector, open-emitter | Open-collector |
| Logic Compatibility | TTL | RTL, DTL and TTL according to supplied comparison data |
Principaux différenciateurs
- Verified STMicroelectronics LM219 family positioning (vs LM319N)
- Through-hole package (vs LM219D)
- Dual-channel integration (vs Single-channel comparator implementations)
Notes de conception
The verified LM219 family information supports operation from a single +5 V supply through ±15 V supplies. Check the exact input common-mode range, output voltage limits, and supply-current limits for the operating condition before selecting resistors or downstream devices. Because the open-collector output may need a pull-up, calculate the pull-up current using the receiving input's high-level threshold, supply voltage, and output leakage rather than assuming the default logic voltage.
Place the comparator close to the signal source and keep high-impedance input traces short, with a ground reference nearby to reduce noise pickup. Route supply and pull-up connections directly to the relevant pins and place bypass capacitance close to the supply pins according to the manufacturer layout guidance. Through-hole construction is useful for prototypes, but lead spacing and pin numbering must match the 14-pin PDIP footprint exactly.
Do not treat an open-collector output as a actively driven push-pull logic output. Add the required pull-up, confirm its logic polarity, and verify that the load current remains within the comparator's allowed output conditions. Also avoid assuming LM319N is a guaranteed LM219N replacement: the supplied cross-reference data describes similarity, but complete pinout, input-range, offset, and timing compatibility still require datasheet review.
Informations de conformité
The supplied verified search results do not provide LM219N-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is treated as not_applicable because the verified data describes a general-purpose comparator and does not claim automotive qualification; confirm any project-specific requirement with the manufacturer.