TS339CD - Micropower Quad CMOS Comparator | STMicroelectronics
Référence : TS339CD ✗ Fin de vieTS339CD Présentation
A voltage comparator is an analog integrated circuit that compares two input voltages and produces a digital logic result indicating which input is higher. The TS339 belongs to the broader comparator hierarchy, where a quad comparator integrates four independent analog-to-digital decision channels. Its CMOS construction combines low power consumption with high input impedance, making it suitable for battery-operated sensing, control, and signal-conditioning systems. The four channels can compare sensor outputs with adjustable references or supervise multiple operating conditions.
Key characteristics include extremely low input bias current, a typical input offset current of 1 pA, and a typical input impedance of 10^12 ohms. The open-drain outputs allow the device to interface with pull-up resistors, level shifters, wired logic buses, and mixed-voltage systems. A typical response time of 1.5 µs for 5 mV overdrive supports applications requiring fast threshold decisions without the higher supply consumption commonly associated with bipolar comparator families.
The TS339 is also described as pin-to-pin and functionally compatible with the bipolar LM339 family. This compatibility makes the open-drain architecture particularly useful when an existing board uses pull-up-based logic. Each comparator can independently monitor a sensor threshold, supply rail, window comparator, or control signal. Because the outputs are open drain, multiple device outputs can share a common pull-up when the system designer confirms that the combined sink-current and timing requirements remain acceptable.
Typical uses include low-power battery monitoring, industrial threshold detection, sensor interface conditioning, overvoltage protection, and embedded control systems. The 14-pin SOIC package supports conventional surface-mount assembly and provides one channel per comparator, making channel assignment straightforward in multi-parameter monitoring systems.
When laying out the circuit, route the comparator inputs away from switching nodes and place the open-drain pull-up resistors close to the output pins. Confirm input common-mode limits, supply-voltage range, output sink-current capability, and the effect of external pull-up resistance before using the device in a new design.
This page combines the manufacturer's functional description, package information, comparator performance characteristics, verified cross-reference candidates, and practical design guidance to support component selection, schematic review, and PCB implementation.
Alternatives de remplacement direct pour TS339CD — 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 TS339CD (même facteur de forme et même empreinte) — différant par Comparator Type, Output Type, Package, Number of Comparators, Operating Temperature Range.
TS339ID
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →TLC339CD
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM339DR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →TS339CD Valeurs maximales et caractéristiques électriques
| Comparator Type | Quad voltage comparator |
| Number of Comparators | 4 |
| Technology | CMOS |
| Type de sortie | Open drain |
| Supply Current per Comparator | 9 µA typical |
| Input Offset Current | 1 pA typical |
| Input Impedance | 10^12 ohms typical |
| Response Time | 1.5 µs typical at 5 mV overdrive |
| Supply Voltage Range | ±8 V to ±16 V |
| Nombre de broches | 14 |
| Boîtier | 14-pin SOIC, 3.90 mm width |
| Type de montage | Surface mount |
| Comparator Type | General purpose |
| LM339 Compatibility | Pin-to-pin and functionally compatible with bipolar LM339 |
Guide de configuration des broches du TS339CD 14-pin soic, 3.90 mm width
Configuration des broches du TS339CD (boîtier 14-pin soic, 3.90 mm width). 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 TS339CD.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
TS339CD convient pour 6 applications: Battery-Powered Threshold Monitoring, Industrial Sensor Interface Conditioning, Supply Rail Supervision, Overvoltage Protection Circuit, Window Comparator and Fault Logic, Low-Leakage Level Detection.
Battery-Powered Threshold Monitoring
The TS339CD is well suited to battery-powered threshold monitoring because each comparator consumes 9 µA typical while providing a typical 1.5 µs response time at 5 mV overdrive. Place the device between a sensor or divided supply signal and a precision threshold reference, then use an open-drain pull-up to create a logic alert. Its 10^12 ohm typical input impedance minimizes sensor loading, while the four independent channels can monitor several voltages from one package. Account for pull-up current in the standby budget and confirm the common-mode range against the battery voltage and sensor output.
Recommandé
Industrial Sensor Interface Conditioning
The TS339CD can convert a slowly changing analog sensor signal into a discrete threshold event for an industrial controller. Its extremely low 1 pA typical input offset current and 10^12 ohm typical input impedance reduce errors when the source has high source resistance. The open-drain output supports an adjustable pull-up voltage, allowing the interface to operate alongside a different logic domain. The 1.5 µs typical response at 5 mV overdrive is useful when the threshold event must be captured quickly. Maintain separation between sensitive input traces and switching-power or relay nodes on the PCB.
Recommandé
Supply Rail Supervision
The four independent TS339CD channels can supervise separate supply rails, power rails, or voltage windows in embedded equipment. Each open-drain output can pull up to a system-defined logic level, making it convenient for wired fault-summary signals. The low 9 µA typical consumption per comparator helps avoid adding significant load to a monitored low-power rail, and the high input impedance reduces divider loading. When implementing a window detector, connect two comparators to opposite sides of a threshold band and combine their open-drain nodes if the circuit timing and sink-current requirements permit.
Recommandé
Overvoltage Protection Circuit
The TS339CD can detect when a supply or signal node crosses a defined limit and assert an open-drain fault indication. The comparator's high input impedance allows a precision divider to define the threshold without materially affecting the monitored node. A fast response helps limit the interval between threshold crossing and shutdown signaling, while the micropower operating current suits compact embedded systems. External pull-up resistors must sink the required fault-state current safely. Also check whether downstream logic needs an inverted or active-low response and choose the pull-up arrangement accordingly.
Recommandé
Window Comparator and Fault Logic
Two TS339CD channels can establish an upper and lower voltage window, while the remaining channels monitor other system conditions. The open-drain structure is particularly useful in window detectors because a common pull-up can combine comparator states into a fault bus. The device's four-channel integration reduces package count compared with four separate single comparators, and its 9 µA typical consumption per channel supports low-power designs. Verify input common-mode limits, output timing, and whether wired-open outputs may be used together under the pull-up resistance selected for the system.
Recommandé
Low-Leakage Level Detection
The TS339CD is appropriate for detecting very small voltage changes around a reference because its typical input offset current is only 1 pA and its typical input impedance reaches 10^12 ohms. These characteristics reduce errors introduced by leakage and source resistance in high-impedance detection networks. The four channels allow independent thresholds to be evaluated without using multiple packages. Use low-leakage PCB surfaces, clean connectors, and guarded routing when node leakage is significant. The external pull-up still consumes current whenever an open-drain output is low, so include that load in a battery-operated design's operating budget.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TS339CD — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TS339ID | TLC339CD | LM339DR |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments | Texas Instruments |
| Package | 14-SO | 14-SO | 14-SO | 14-SO |
| Comparator Count | 4 | 4 | 4 | 4 |
| Output Type | Open drain | Open drain | Open-drain MOS output | Open collector |
| Comparator Technology | CMOS | CMOS | CMOS | Bipolar |
Principaux différenciateurs
- Lower typical channel supply current than the bipolar LM339DR alternative (vs LM339DR)
- Micropower operation with a 1 pA typical input offset current (vs TLC339CD)
- Closest same-family documented replacement (vs TS339ID)
Notes de conception
Place each open-drain pull-up resistor close to its associated TS339CD output pin. Keep the pull-up return path short and route the four comparator input nets away from switching nodes, inductors, high-current relay traces, and clock edges. High input impedance reduces DC loading, but it does not prevent capacitive pickup on a PCB. Guard grounded traces around sensitive non-inverting inputs when the source impedance is high.
Include the open-drain pull-up current in the power budget. Estimated: a logic-high state with no output switching adds only the comparator's typical 9 µA per channel, but a continuously low output adds the pull-up current, calculated as Vpull-up divided by Rpull-up. Choose the pull-up value to satisfy receiver rise-time requirements without imposing unnecessary continuous load on the monitored rail.
Do not treat every open-drain output as interchangeable without checking the output logic and timing. The TS339CD output is low when the non-inverting input is below the inverting input, assuming normal comparator operation, but the external pull-up establishes the opposite logic level. Also verify that signals remain inside the input common-mode range and that the selected supply configuration provides adequate headroom.
Avoid directly paralleling open-drain outputs unless the circuit designer has confirmed the combined sink-current limit and acceptable transition behavior. The outputs can support a wired fault bus in suitable designs, but the pull-up resistor must tolerate the worst-case sink current from every simultaneously active channel. Confirm that the receiver interprets the resulting active-low or active-high fault state correctly.
Informations de conformité
No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified for TS339CD. The device is an obsolete general-purpose comparator rather than an automotive-qualified product.
