TS393IN - 2-Channel 9 uA CMOS Comparator | STMicroelectronics
N.º da peça: TS393IN ✓ AtivoTS393IN Visão geral
A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when the non-inverting input rises above the inverting input, or conversely. Within the broader semiconductor hierarchy, the TS393IN belongs to the comparator and amplifier IC class, supporting signal conditioning, threshold detection, sensing, and control applications. Its CMOS construction combines low bias current with high input impedance, helping preserve weak sensor signals.
Key features include extremely high input impedance of 10^12 ohms typical, low typical consumption of 9 uA per comparator, and a response time of 2.5 us typical. The device is compatible with bipolar LM393 applications while offering CMOS input behavior. Two independent channels allow simultaneous comparisons or the implementation of window-comparator and independent threshold-detection functions within one package.
The open-drain outputs require an external pull-up resistor when the output must reach a defined logic-high voltage. This arrangement supports wired-open-drain logic, level translation, and system designs in which several devices share a bus, provided the pull-up voltage and sink-current limits are checked. Each comparator can also operate in the standard comparator configuration, with one input serving as the threshold and the other accepting the sensed signal.
Typical uses include battery-powered sensor interfaces, low-voltage threshold detection, industrial control logic, monitoring systems, and compact embedded equipment. The TS393IN is particularly useful when the signal source has high source impedance and conventional bipolar comparators would load the input. Its low power consumption also benefits longer-running battery systems, although total system current should include pull-up resistors and external circuitry.
For PCB layout, place the pull-up resistors close to the open-drain output nets and keep sensitive input traces away from switching nodes and high-current return paths. Confirm the absolute maximum supply voltage, input common-mode range, output sink current, and input protection limits against the manufacturer datasheet before applying either input beyond the recommended operating range.
This product page combines the TS393IN electrical characteristics, pin assignment, package information, practical comparator design guidance, application examples, and drop-in replacement analysis to support faster component selection and board-level implementation.
Alternativas drop-in para TS393IN — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TS393IN (mesmo formato e footprint) — diferindo em Comparator Type, Output Type, Package, RoHS Status, Number of Comparators.
TS393CN
✅ Drop-InConsulte o preço
Ver ficha técnica →LM2903N
✅ Drop-InConsulte o preço
Ver ficha técnica →LM393N
✅ Drop-InConsulte o preço
Ver ficha técnica →LM393P
✅ Drop-InConsulte o preço
Ver ficha técnica →TS393IN Classificações máximas e características elétricas
| Comparator Channels | 2 channels |
| Supply Current per Comparator | 9 uA typical |
| Response Time | 2.5 us typical |
| Input Impedance | 10^12 ohms typical |
| Logic Family | CMOS |
| Tipo de saída | Open drain |
| Comparator Type | General-purpose voltage comparator |
| Encapsulamento | 8-pin DIP |
| Contagem de pinos | 8 pins |
| Tipo de montagem | Through-hole |
Configuração de pinos do TS393IN
| Pino 1 | OUT1 — Comparator 1 open-drain output |
| Pino 2 | IN1- — Comparator 1 inverting input |
| Pino 3 | IN1+ — Comparator 1 non-inverting input |
| Pino 4 | GND — Ground |
| Pino 5 | IN2+ — Comparator 2 non-inverting input |
| Pino 6 | IN2- — Comparator 2 inverting input |
| Pino 7 | OUT2 — Comparator 2 open-drain output |
| Pino 8 | VCC — Positive power supply |
Aplicações típicas
TS393IN é adequado para 6 aplicaçãos: Battery-Powered Sensor Threshold Detection, Industrial Process Limit Monitoring, Low-Voltage Logic Monitoring, Window and Overvoltage Detection, Audio and Communication Signal Conditioning, Automated Equipment Event Flagging.
Battery-Powered Sensor Threshold Detection
The TS393IN fits battery-operated sensing systems that must detect when a slow or high-impedance sensor signal crosses a defined threshold. Its typical input impedance of 10^12 ohms minimizes loading, while the 9 uA typical consumption per comparator preserves battery life better than a conventional bipolar LM393. Place one channel across the sensor and reference node, add a pull-up resistor to each open-drain output, and connect the result to a microcontroller wake-up or interrupt input. The 2.5 us typical response is sufficient for many temperature, light, and capacitive sensing events, although threshold accuracy should be evaluated against the sensor’s noise, drift, and operating speed.
Recomendado
Industrial Process Limit Monitoring
The TS393IN can monitor a control signal against an adjustable reference in industrial equipment with strict power budgets. Its two independent channels allow simultaneous upper- and lower-limit checks, or separate comparisons for a process variable and a fault signal. Each open-drain output can pull a wired logic node low, allowing multiple alarm sources to share a common pull-up arrangement. The low 9 uA typical consumption per channel is valuable in distributed sensing, while the high typical input impedance reduces loading on source impedances above the megohm range. Before deployment, verify the input common-mode range, supply voltage, pull-up current, and behavior during startup or sensor disconnection.
Recomendado
Low-Voltage Logic Monitoring
The TS393IN is useful for supervising a low-voltage logic rail or detecting a valid control level in compact embedded systems. Its 9 uA typical consumption per comparator limits the penalty of continuous supervision, while the CMOS input stage provides a typical impedance of 10^12 ohms. The open-drain output can directly interrupt a host controller when a monitored voltage moves outside the expected range. Select the pull-up voltage to match the receiving logic and verify that the resulting logic-high level and rise time meet the interface timing requirement. Where the monitored signal can exceed the comparator input limits during power sequencing, add external clamping or protection rather than relying on internal protection.
Recomendado
Window and Overvoltage Detection
Two TS393IN channels can implement a window detector by comparing an input signal against an upper and a lower reference. The circuit requires stable reference sources, input routing, and one pull-up per open-drain output; an external logic gate can combine the two outputs into an in-range indication. The 2.5 us typical response allows quick recognition of excursions, and the 9 uA typical supply current per channel helps preserve power in portable instruments. Reference accuracy, input offset, and resistor tolerances will set the practical window limits, so use the manufacturer datasheet and measured system tolerances when defining acceptable operating boundaries.
Recomendado
Audio and Communication Signal Conditioning
The TS393IN can serve as a high-impedance threshold comparator in audio, communications, and signal-conditioning equipment where the objective is to convert an analog level into a digital event rather than amplify it. Its 10^12-ohm typical input impedance is well suited to weak sources, and the 2.5 us typical response handles many envelope, trigger, and activity-detection tasks. Route the compared signal to the appropriate non-inverting and inverting inputs, and use the open-drain output with a pull-up to create a clean logic indication. Keep the input traces short and away from noisy switching nodes, and verify the signal bandwidth and common-mode limits when the source can swing rapidly.
Recomendado
Automated Equipment Event Flagging
The TS393IN can create fault flags in automated test and measurement equipment by comparing a status or control voltage with a threshold. Its two channels provide independent fault detection within a single DIP-8 package, reducing component count where multiple digital status decisions are needed. The low typical consumption of 9 uA per comparator is advantageous when many channels remain active in test fixtures or distributed acquisition modules. Because the outputs are open drain, several fault sources can share a pull-up node if their logic polarity and sink-current requirements are compatible. Define fail-safe states, power-on behavior, and reset requirements before using the comparator output as a safety or interlock signal.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TS393IN — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TS393CN | LM2903N | LM393N | LM393P |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments | Texas Instruments |
| Package | DIP-8 | DIP-8 - same | DIP-8 - same | DIP-8 - same | DIP-8 - same |
| Comparator Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Input Stage | CMOS | CMOS | Bipolar | Bipolar | Bipolar |
| Output Type | Open drain | Open drain | Open collector | Open collector | Open collector |
| Typical Supply Current per Comparator | 9 uA | 9 uA | Approximately 50 uA | Approximately 50 uA | Approximately 50 uA |
Principais diferenciais
- Lower typical comparator consumption (vs LM393N)
- Higher typical input impedance (vs LM393P)
- Fast micropower CMOS operation (vs LM2903N)
Notas de projeto
The TS393IN consumes 9 uA per comparator typically, but the external pull-up resistors can dominate the total current. Estimated: with a 10 kohm pull-up at 5 V, each actively low output can add up to 0.5 mA of pull-up current while the output remains low. Select the largest pull-up resistance that still satisfies the receiver's rise-time and noise-immunity requirements, and include these loads in the power budget.
Route the two non-inverting inputs, two inverting inputs, and supply pins directly from their sources to the DIP-8 pins, keeping the analog input traces short and isolated from switching-node copper. Place each output pull-up resistor close to the corresponding output pin and the connected receiver to minimize the high-impedance trace length. A ground plane should remain continuous beneath the device, while analog return currents should avoid sharing paths with high-current loads.
Do not treat the open-drain output as a actively driven logic output. Use a pull-up resistor to the voltage required by the receiving logic, and verify the comparator's sink-current rating. Also check that both input voltages remain inside the specified common-mode range during startup, shutdown, and fault conditions. The 10^12-ohm typical input impedance minimizes loading but does not protect the inputs from excessive voltage or sustained ESD exposure.
For slowly changing thresholds, input offset, reference noise, and switching chatter can matter more than the 2.5 us typical response time. Use a clean reference source and add hysteresis through positive feedback when repeated switching around the threshold would be undesirable. Keep the feedback resistor path compact, and evaluate the hysteresis with realistic source impedance and supply variation rather than relying only on nominal resistor values.
Informações de conformidade
Compliance declarations were not identified in the manufacturer page information for TS393IN. Check the current STMicroelectronics product documentation and material declaration before releasing a regulated design.
