LM339FV-E2 - Quad Open-Collector Comparator | ROHM
Référence : LM339FV-E2 ✗ Fin de vieLM339FV-E2 Présentation
A comparator is an analog integrated circuit that evaluates two input voltages and produces a logic-level indication of their relationship. The LM339 belongs to the broader comparator and analog interface hierarchy, where it bridges precision input sensing and digital control logic. Its open-collector outputs can support wired logic, level translation, and relay-driving functions when paired with suitable external pull-up circuitry.
Four comparison channels provide a practical advantage over dual comparators where board area is constrained. The 3 V to 32 V supply range allows operation from low-voltage analog systems through conventional industrial control rails. A 1 us response time supports fast threshold decisions, while low supply current and a 250 nA input-output bias-current specification help limit loading on high-impedance sensing networks.
Each comparator channel compares a non-inverting and an inverting input and uses an open-collector output structure. The open-collector transistor can pull the output toward ground but cannot actively drive it high, so a pull-up resistor is normally required. This architecture provides flexibility for interfacing with 3.3 V, 5 V, or other logic rails while also permitting multiple open-collector outputs to share a common bus when the system design permits wired-AND behavior.
Typical uses include industrial threshold detection, power-supply sequencing, sensor signal conditioning, battery monitoring, window comparison, and general control logic. The quad-channel organization is particularly useful in monitoring systems that must evaluate several temperature, voltage, current, or sensor thresholds independently. Tape-and-reel packaging supports automated surface-mount assembly, although the narrow SSOP-B package still warrants careful inspection and soldering practices.
Designers should account for the open-collector output when calculating pull-up resistor values and checking the sink-current capability of every attached node. Input common-mode limits, output saturation behavior, supply decoupling, and channel-to-channel timing should be reviewed against the manufacturer datasheet. For new designs, the manufacturer classifies LM339FV-E2 as not recommended for new designs, so a currently supported comparator should be considered when a lifecycle-compliant component is required.
This product page combines the exact ROHM ordering information with engineering-focused comparisons, application guidance, design cautions, and sourcing instructions. It distinguishes the LM339FV-E2 from dual-channel comparator alternatives while keeping the focus on verified package, supply-voltage, output-type, timing, and lifecycle characteristics.
Alternatives de remplacement direct pour LM339FV-E2 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesLM339FV-E2 Valeurs maximales et caractéristiques électriques
| Comparator Type | Quad general-purpose ground-sense comparator |
| Number of Channels | 4 channels |
| Type de sortie | Open collector |
| Operating Supply Voltage Range | 3 V to 32 V |
| Response Time | 1 us |
| Input Offset Current | 250 nA |
| Boîtier | SSOP-B14 |
| Type de montage | Surface mount |
| Packing Type | Taping |
| Statut du cycle de vie | Not Recommended for New Designs |
| Nombre de broches | 14 pins |
| Comparator Inputs Per Channel | 2 voltage inputs |
| Courant d'alimentation | Low supply current |
| Ground-Sense Operation | Supported |
Guide de configuration des broches du LM339FV-E2 ssop-b14
Configuration des broches du LM339FV-E2 (boîtier ssop-b14). 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 LM339FV-E2.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LM339FV-E2 convient pour 6 applications: Industrial Threshold Detection, Power-Supply Sequence Control, Battery Voltage Monitoring, Sensor Signal Conditioning, Window Comparison, LED and Relay Control.
Industrial Threshold Detection
The LM339FV-E2 fits industrial threshold-detection boards because four channels can monitor separate voltage limits without requiring four single-channel devices. Its 3 V to 32 V operating range suits conventional control environments, while the 1 us response time supports prompt switching decisions. Each open-collector output can drive a digital input or relay-driver stage through an appropriate pull-up and current-limiting network. Protect externally wired sensor nodes with suitable filtering and transient protection, and confirm that each signal remains within the datasheet’s input common-mode limits.
Recommandé
Power-Supply Sequence Control
The LM339FV-E2 can supervise several supply rails and generate discrete sequence or power-good signals. Its four independent channels allow different thresholds to be evaluated, while the 3 V to 32 V supply range supports controller circuitry operating from conventional industrial rails. Use each open-collector output with a pull-up tied to the appropriate logic rail. The 1 us response time provides rapid threshold recognition, although feedback-loop stability and the time required for rails to settle must be included in the sequence design.
Recommandé
Battery Voltage Monitoring
The LM339FV-E2 is applicable to battery-management monitoring when individual cell or pack voltages must be compared against fixed thresholds. Four channels can reduce the number of external comparator ICs, and the 1 us response time is suitable for fast threshold transitions. The open-collector outputs can be pulled up to a logic rail or combined with a wired-AND arrangement where appropriate. Because battery systems can contain large transients, include resistor dividers, filtering, and protection that keep every input within the manufacturer’s absolute-maximum and common-mode limits.
Recommandé
Sensor Signal Conditioning
The LM339FV-E2 can convert conditioned analog sensor outputs into logic-compatible decisions. Its low 250 nA input-output bias current specification is useful when the signal source has high impedance, and the four-channel arrangement supports multiple alarm or limit functions. Place input conditioning close to the comparator pins, maintain the required bypassing, and use an open-collector pull-up that matches the downstream logic voltage. The device should be used only when the sensor’s voltage range fits the comparator input-common-mode specifications for the selected supply voltage.
Recommandé
Window Comparison
The LM339FV-E2 can implement upper and lower window checks by assigning separate comparator channels to the two limits. This arrangement is useful in level supervision, battery pack qualification, and signal-range validation. A 1 us response time allows quick detection when a monitored signal crosses either boundary, while the open-collector outputs provide flexible interface options through pull-up resistors. Design the hysteresis carefully because comparator offset and propagation delay can otherwise cause repeated output transitions near a threshold.
Recommandé
LED and Relay Control
The LM339FV-E2 can produce control decisions for LEDs, relays, and other discrete loads in low-voltage automation equipment. The open-collector output can sink current to a driver stage, but it cannot source a positive voltage without a pull-up. This arrangement allows the load supply and logic supply to be selected separately. Confirm output-current limits, ensure inductive loads have appropriate flyback protection, and use the 3 V to 32 V supply range as part of the overall system budget rather than driving the load directly from an unsuitable rail.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM339FV-E2 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | ROHM Semiconductor |
| Package | SSOP-B14 |
| Comparator Channels | 4 channels |
| Output Type | Open collector |
| Operating Supply Voltage | 3 V to 32 V |
| Response Time | 1 us |
| Input-Output Bias Current | 250 nA |
| Lifecycle Status | Not Recommended for New Designs |
| Packing Type | Taping |
Principaux différenciateurs
- Four independent comparison channels in one IC (vs LM2904P3)
- Legacy 14-pin integration level (vs LM2904P3)
- Broad operating supply range (vs TLV2402ID)
Notes de conception
Do not connect a downstream circuit directly to an open-collector output without confirming the logic level and pull-up arrangement. The output transistor pulls the node toward ground but cannot source a high level. Choose the pull-up rail, calculate its current at the lowest valid output voltage, and verify the sink-current capability at the intended temperature. Using a pull-up intended for another family can alter the valid high level or exceed an output rating.
Place the required supply-decoupling capacitor close to the device’s supply pins and keep its ground return short. Decoupling helps prevent comparator input or output disturbance from propagating through the supply network. Because the LM339FV-E2 contains four channels, review whether the selected capacitor value and PCB return geometry support the intended switching activity. Validate transient and supply-startup behavior against the manufacturer’s recommended application conditions.
Keep high-impedance input traces short, shield them from switching nodes and relay wiring, and connect each comparator’s reference input close to the signal-conditioning network. Open-collector pull-up traces can pick up noise when routed over long switching paths. Preserve a continuous ground reference for the four channels and place input protection components where their surge current will be diverted away from the comparator pins.
Do not assume that the 3 V to 32 V supply rating automatically makes every input signal acceptable. The sensed voltages must also satisfy the datasheet’s input common-mode range for the chosen supply. Add resistor dividers or level translation where required, especially for negative or high-voltage sensing nodes. Avoid using the legacy lifecycle status as evidence of present suitability for a new production program; request a lifecycle assessment before design release.
Informations de conformité
The manufacturer product page confirms the ordering code, SSOP-B14 package, taping packing, and not-recommended-for-new-designs status. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not identified in the referenced material, so those fields remain unknown. AEC-Q100 is not applicable because this is a general-purpose comparator rather than an automotive-qualified device designation.
