TS393CD - Dual Micropower Comparator | STMicroelectronics
Référence : TS393CD ✓ ActifTS393CD Présentation
A voltage comparator is an analog integrated circuit that evaluates two input voltages and changes its output state when their relationship crosses a defined threshold. The TS393 belongs to the comparator hierarchy, where it combines analog signal comparison with digital open-drain output signaling. Two independent channels in one package conserve board area in low-power sensing, monitoring, and control systems.
The principal advantages are low power consumption, high input impedance, and a response time suited to general-purpose decision circuits. Each comparator consumes 9 µA typically, while the datasheet describes this as approximately 20 times lower consumption than a bipolar LM393. The open-drain outputs permit wired logic, wired-OR operation, and level translation when an external pull-up resistor is used. The 2.7 V to 16 V supply range supports low-voltage systems while retaining operating temperature coverage from -40 °C to 125 °C.
The TS393CD uses CMOS input stages to achieve a typical input impedance of 10^12 ohms. This makes the device suitable for high-impedance sensors and divider networks because the input stage draws very little current. Its maximum input offset voltage of 6.5 mV defines the practical input-referred threshold uncertainty around the comparison point. Although the response time is not as short as that of a dedicated high-speed comparator, 2.5 µs is suitable for envelope detection, threshold supervision, and slow digital control loops.
Typical uses include battery-powered sensor conditioning, window or level detection, overvoltage and undervoltage supervision, temperature threshold systems, and industrial control inputs. The two channels can monitor two independent quantities, or they can be used together when a more complex decision or hysteresis arrangement is required. Open-drain outputs are especially useful when multiple comparators must share a common bus.
The principal design consideration is the open-drain output. Every output requires a pull-up resistor to the appropriate logic supply, and the selected resistor must satisfy the output's sink-current and rise-time requirements. The input common-mode range, output saturation levels, and pull-up voltage must also be checked against the circuit operating conditions before deployment.
This product page combines manufacturer specifications, package and pin information, application guidance, and a focused replacement comparison. It highlights where the TS393CD differs from related open-drain comparator choices and explains the electrical checks required before approving a substitute in an existing PCB design.
Alternatives de remplacement direct pour TS393CD — 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 TS393CD (même facteur de forme et même empreinte) — différant par Comparator Type, Input Bias Current, Input Offset Voltage, Number of Channels, Output Type.
TS393IDT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM239DR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →TS393CD Valeurs maximales et caractéristiques électriques
| Comparator Type | Dual general-purpose voltage comparator |
| Number of Channels | 2 channels |
| Courant d'alimentation | 9 µA typical per comparator |
| Supply Voltage Range | 2.7 V to 16 V |
| Input Impedance | 10^12 ohms typical |
| Response Time | 2.5 µs typical |
| Input Offset Voltage | 6.5 mV maximum |
| Input Bias Current | 0.0006 µA |
| Type de sortie | CMOS open-drain |
| Output Function | General-purpose comparator |
| Plage de température de fonctionnement | -40 °C to 125 °C |
| Boîtier | 8-pin SOIC |
| Type de montage | Surface mount |
| Logic Compatibility | Compatible with bipolar LM393 |
| Related Output Architecture | Push-pull output available in TS3702 family |
Configuration des broches de TS393CD
| Broche 1 | OUT1 — Comparator 1 open-drain output |
| Broche 2 | IN-1 — Comparator 1 inverting input |
| Broche 3 | IN+1 — Comparator 1 non-inverting input |
| Broche 4 | V- — Negative supply or ground connection |
| Broche 5 | IN+2 — Comparator 2 non-inverting input |
| Broche 6 | IN-2 — Comparator 2 inverting input |
| Broche 7 | OUT2 — Comparator 2 open-drain output |
| Broche 8 | V+ — Positive supply connection |
Applications typiques
TS393CD convient pour 6 applications: Battery-Powered Threshold Detection, Industrial Sensor Interfacing, Battery Overvoltage Monitoring, Temperature Limit Detection, Window Comparator Logic, Open-Drain Fault Bus.
Battery-Powered Threshold Detection
The TS393CD fits battery-powered threshold detection because each comparator consumes 9 µA typically while presenting a 10^12 ohm typical input impedance. Place the device across a divided battery or sensor signal, configure the threshold at IN+ and IN−, and add the required pull-up resistor to each open-drain output. The low input current minimizes divider error, while the 6.5 mV maximum input offset voltage must be considered when the monitored difference is small. For duty-cycled systems, switching the supply off between measurements can reduce energy use further.
Recommandé
Industrial Sensor Interfacing
The TS393CD is suitable for monitoring slowly changing industrial sensor signals when low input loading and low supply current are priorities. Its 10^12 ohm typical input impedance allows a resistive divider or high-impedance sensor to drive the comparator inputs with minimal disturbance, and the 2.5 µs typical response is appropriate for supervisory rather than waveform-critical functions. Place a pull-up on the open-drain output so a fault or threshold event can drive a controller input. Verify the sensor's common-mode voltage against the comparator's operating limits and include offset tolerance in the threshold design.
Recommandé
Battery Overvoltage Monitoring
The TS393CD can supervise a battery pack by comparing a scaled pack voltage against a reference threshold. The 2.7 V to 16 V operating range accommodates low-voltage systems, and 9 µA typical consumption per comparator minimizes continuous monitoring overhead. An open-drain output provides a useful fault indication because it can remain high impedance during normal operation and pull the fault node low only when an event is detected. The pull-up voltage must remain compatible with the supervisor receiver, and the resistor divider should account for its tolerance and the comparator's 6.5 mV maximum offset.
Recommandé
Temperature Limit Detection
The TS393CD supports temperature-limit detection when a sensor produces an analog voltage proportional to temperature. Its high typical input impedance of 10^12 ohms reduces loading on the sensing network, while the 2.5 µs typical response time is more than sufficient for a thermal protection loop. Connect the sensor signal to one input and a reference or divided threshold to the other, then use a pull-up resistor with the open-drain output. Design the threshold margin to exceed comparator offset, reference tolerance, sensor error, and intended temperature hysteresis.
Recommandé
Window Comparator Logic
Two TS393CD channels can implement upper and lower bounds for a monitored signal, creating a window-comparison function from one 8-pin SOIC package. Each open-drain output can represent a limit event, and the two outputs may be combined with external logic or separate pull-ups. The 10^12 ohm typical input impedance is useful when the monitored voltage comes from a high-impedance divider. Because the two channels are not guaranteed to have perfectly matched thresholds, include offset tolerance when setting narrow window limits and validate both outputs across supply, temperature, and input overdrive conditions.
Recommandé
Open-Drain Fault Bus
The TS393CD open-drain outputs are useful in a fault bus where several monitoring channels must report a fault without driving a logic rail directly. Each output can pull a common pulled-up bus low, while the high-impedance state indicates that its monitored condition remains normal. This arrangement reduces the number of controller inputs and supports wired fault signaling. Confirm that the combined sink current remains within the output rating, select the pull-up for the required logic level and bus rise time, and account for propagation delay when coordinating multiple events.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TS393CD — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TS393IDT | LM239DR |
|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Comparator Channels | 2 | 2 | 2 |
| Output Type | CMOS open-drain | CMOS open-drain | Open-drain |
Principaux différenciateurs
- Lower typical channel supply current for micropower designs (vs LM239DR)
- Very high input impedance for divider and sensor interfaces (vs LM239DR)
- Two independent open-drain channels in one compact package (vs TS393IDT)
Notes de conception
Do not treat the open-drain output as a push-pull logic output. Each output requires a pull-up resistor, and that resistor determines the high voltage, power consumption, and output rise time. Verify that the pull-up rail is within the output ratings, that the resistor can support the required sink current, and that multiple open-drain outputs connected to one node remain within the combined current limit.
Place input and output components close to their corresponding pins and keep the comparator input traces away from noisy switching nodes. A 10^12 ohm typical input impedance reduces DC loading, but very high impedance nodes can still be affected by leakage, contamination, and nearby interference. Use guarded routing where appropriate, keep the threshold node physically compact, and confirm that input overdrive and common-mode conditions remain within the device limits.
Budget the continuous supply current as two comparator channels at 9 µA typical each, plus the current drawn through each pull-up resistor during a low output state. The pull-up resistance and logic voltage can dominate the total power in a low-duty-cycle design. Select the largest pull-up value that still meets the receiver's rise-time requirement, then validate the resulting discharge current and power consumption.
Account for the 6.5 mV maximum input offset voltage when defining a threshold close to the monitored value. Include reference tolerance, resistor-divider error, input bias effects, temperature drift, and intended hysteresis in the error budget. For window detection, evaluate both comparator channels independently because their offset and transition characteristics determine the actual upper and lower limits.
Informations de conformité
The TS393CD is a general-purpose dual comparator rather than an automotive-qualified device. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status should be confirmed from the current STMicroelectronics product documentation or regional declaration before a regulated production release.
