LM393FVJ-E2 - Dual Open-Collector Comparator | ROHM
Référence : LM393FVJ-E2 ✗ Fin de vieLM393FVJ-E2 Présentation
A comparator is a semiconductor interface that converts the relationship between two voltages into a logic-level indication. The LM393 belongs to the broader open-collector comparator family, providing a straightforward alternative to logic gates when an analog threshold must be evaluated. Its two independent channels make it useful for monitoring two conditions, while its open-collector outputs allow multiple comparators to share a pull-up resistor and participate in wired-AND or wired-OR arrangements.
The principal features of the LM393FVJ-E2 include wide operating supply voltage, ground-sensed input and output, open-collector outputs, low offset voltage, and a broad operating temperature range. According to the ROHM product documentation, the 3.0 V to 36.0 V supply capability permits operation from low-voltage systems through higher industrial rails. The open-collector architecture also gives the designer control over the output pull-up voltage, which is useful when interfacing the comparator with a supply different from its own.
Each internal channel consists of a differential input stage followed by an open-collector output stage. The inverting and non-inverting inputs determine the output state according to the applied voltage relationship. Because the output transistor is open collector, an external pull-up resistor is required. The output can remain in a high-impedance state while the transistor is off, and the pull-up establishes the high output voltage without requiring an active push-pull output stage.
Typical applications include general-purpose threshold detection, current monitoring, battery monitoring, window comparators, relay-control interfaces, and multivibrator circuits. In a battery monitor, the two input channels can independently evaluate charge and discharge thresholds. In an industrial control system, the open-collector output can interface with a suitably rated relay driver or other pull-up-equipped peripheral.
Designers should select an external pull-up resistor that satisfies the required sink current, output rise time, and downstream-device input limits. The pull-up should connect only to a compatible positive supply, and the circuit must account for the open-collector output remaining off during reset or fault conditions. Confirming the input common-mode range and output-current limits at the intended supply voltage is essential for reliable operation.
This page organizes the ROHM product details, verified distributor records, lifecycle status, application guidance, and replacement assessment into one engineering-focused reference. It also identifies which technical attributes require confirmation from the manufacturer datasheet before a board is released to production.
Alternatives de remplacement direct pour LM393FVJ-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 alternativesLM393FVJ-E2 Valeurs maximales et caractéristiques électriques
| Product Type | Dual general-purpose comparator |
| Comparator Channel Count | 2 channels |
| Operating Supply Voltage Range | 3.0 V to 36.0 V |
| Type de sortie | Open collector |
| Input Type | Differential comparator input |
| Ground-Sensed Input | Supported |
| Ground-Sensed Output | Supported |
| Plage de température de fonctionnement | -40°C to 125°C |
| Boîtier | 8-pin TSSOP-B8J |
| Type de montage | Surface mount |
| Packing Type | Taping |
| Statut du cycle de vie | Not Recommended for New Designs |
| Low Offset Voltage | Supported |
Guide de configuration des broches du LM393FVJ-E2 8-pin tssop-b8j
Configuration des broches du LM393FVJ-E2 (boîtier 8-pin tssop-b8j). 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 LM393FVJ-E2.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LM393FVJ-E2 convient pour 6 applications: Battery Voltage Monitoring, Current Monitoring, Industrial Window Comparison, Relay and Alarm Interface, Ground-Sense Detection, General-Purpose Logic Interfacing.
Battery Voltage Monitoring
The LM393FVJ-E2 is appropriate for a dual-threshold battery monitor because its two comparator channels can independently detect upper and lower voltage conditions. A resistor divider scales the battery voltage, while each channel compares that signal with a reference threshold. Its 3.0 V to 36.0 V operating supply range supports varied battery systems, and the open-collector outputs can drive pull-up-equipped alarm or status logic. The divider ratio, reference accuracy, input common-mode limits, and hysteresis must be evaluated over the full battery range.
Recommandé
Current Monitoring
The dual open-collector comparators in the LM393FVJ-E2 can monitor a current-sense voltage against one or two thresholds. One channel can indicate an overload condition, while another can detect a lower operating range. A differential input arrangement may use both channels for upper and lower limits, provided the sense voltage stays within the permitted input range. Because the outputs are open collector, external pull-up resistors are required and can be selected to match the logic supply and required switching speed.
Recommandé
Industrial Window Comparison
The LM393FVJ-E2 is well suited to a window comparator that detects when a measured voltage is either below a lower threshold or above an upper threshold. Two independent channels provide separate threshold decisions, while open-collector outputs can be combined through a common pull-up network. Its broad 3.0 V to 36.0 V supply range supports industrial control environments, but designers must verify the input common-mode range and include suitable filtering when the monitored signal contains switching noise.
Recommandé
Relay and Alarm Interface
The LM393FVJ-E2 can convert an analog condition into an open-collector alarm or relay-control signal. A pull-up resistor establishes the inactive logic level, while a comparator channel sinks current when the monitored voltage crosses its threshold. This architecture is useful in legacy control systems where a pulled-low output can drive an input stage, optointerface, or suitably rated driver. The design must account for the required pull-up current, output sink capability, isolation rules, and any inductive loads connected beyond the comparator.
Recommandé
Ground-Sense Detection
Ground-sense detection benefits from the LM393FVJ-E2 because the ROHM device is identified as supporting ground-sensed input and output. The comparator can evaluate a signal relative to the system ground, making it suitable for detecting ground-level conditions in selected monitoring circuits. Two channels can support simultaneous positive and negative threshold checks. The actual usable input range must be confirmed from the manufacturer datasheet because a ground-sensed output does not mean every input voltage can be compared over the entire 3.0 V to 36.0 V supply range.
Recommandé
General-Purpose Logic Interfacing
The LM393FVJ-E2 can interface analog-derived logic conditions with systems that use open-collector signaling. Its two channels provide independent comparisons, and the outputs can be tied to a shared pull-up when wired-AND behavior is required. This makes the device useful in legacy alarm, sequencing, and monitoring circuits where open-collector outputs simplify connection to pull-up-equipped logic. The output pull-up voltage, maximum sink current, and transition requirements should be selected together to preserve reliable signal timing.
Recommandé
Données de référence d'ingénierie pour LM393FVJ-E2 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Notes de conception
An external pull-up resistor is mandatory for each open-collector output. Select the resistor so the maximum output sink current remains within the device rating while the pull-up produces adequate logic rise time. The resistor value also controls power dissipation in the pulled-low state and noise susceptibility. Refer to the manufacturer pin and electrical-characteristic tables before assigning the pull-up supply or calculating its maximum current.
Place the pull-up resistor close to the open-collector output and the receiving input to minimize the trace area that can act as an antenna. Keep sensitive comparator inputs away from switching nodes and high-current return paths. If the input source is remote, minimize input-loop area and consider guarding or filtering near the device, while preserving the stability and response behavior specified by the manufacturer.
The 3.0 V to 36.0 V range describes the operating supply envelope, not permission to use any intermediate rail without checking the electrical limits. Verify input common-mode range, output sink current, offset voltage, and supply-current behavior at the selected voltage. Decouple the supply close to the device and account for transients on industrial or automotive-style power rails before using the comparator near its upper operating limit.
Informations de conformité
ROHM lists LM393FVJ-E2 as Not Recommended for New Designs in an 8-pin TSSOP-B8J package with taping packing. RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status were not stated in the cited records and require confirmation from the manufacturer or its material-compliance documentation.
