LM293H - Dual Differential Comparator | Texas Instruments
N.º da peça: LM293H ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
LM293H Visão geral
A differential comparator is a semiconductor device that compares two input voltages and produces a logic-level indication of their relationship. The dual-channel architecture provides two independent comparators in one package, reducing component count in threshold detection, overvoltage indication, current sensing, and control systems. Its open-collector outputs require an external pull-up resistor when the output must settle to a valid high level. The LM293 family is associated with wide supply capability, single-supply operation, and compatibility with common logic families.
The LM293H is identified in the verified distributor data as an 8-pin TO-99-8 device with two channels. The manufacturer family information describes the LM293 as an industrial-grade dual differential comparator. The verified search data specifically lists low power, low offset voltage, rail-to-rail input labeling, open-collector output, and a wide supply operating range. Detailed electrical limits, propagation-delay curves, input common-mode limits, output sink-current limits, and temperature limits must be confirmed in the manufacturer datasheet before final design release.
Typical uses include battery-powered monitoring, industrial sensor interfaces, overvoltage detection, temperature threshold circuits, and dual-rail control logic. In a practical design, each comparator can monitor a signal against a reference voltage while the open-collector output drives a pull-up and the downstream logic input. Care is required when inputs approach supply rails, when output pull-up speed affects timing, or when unused comparator channels are left unconnected.
This page combines verified manufacturer and distributor links, package identification, application guidance, and structured comparison information. It intentionally avoids filling unavailable electrical values with guesses; consult the current manufacturer datasheet for authoritative limits, ordering details, and lifecycle information.
Alternativas drop-in para LM293H — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LM293H/NOPB
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM2903H
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM393H
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM2902H
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM339H
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM293H Classificações máximas e características elétricas
| Comparator Type | Dual differential comparator |
| Number of Channels | 2 independent channels |
| Tipo de saída | Open-collector |
| Supply Operating Range | 2.0 V to 36 V |
| Single or Dual Supply | Single or dual supply |
| Common-Mode Input Range | Rail-to-rail |
| Differential Input Voltage Range | Equal to maximum-rated supply voltage, ±38 V |
| Low Offset Voltage | As low as 2.0 mV maximum |
| Logic Compatibility | TTL, MOS, and CMOS |
| Encapsulamento | TO-99-8 |
| Contagem de pinos | 8 pins |
| Tipo de montagem | Through-hole |
| Industrial Grade | Industrial grade |
| Manufacturer | Texas Instruments |
Guia de Configuração de Pinos do LM293H to-99-8
Configuração de pinos para LM293H (pacote to-99-8). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para LM293H.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
LM293H é adequado para 6 aplicaçãos: Battery Voltage Monitoring, Overvoltage and Undervoltage Detection, Industrial Sensor Thresholding, Temperature Limit Signaling, Current-Sense Limit Detection, Embedded Control and Logic Interfacing.
Battery Voltage Monitoring
The LM293H is suitable for monitoring a battery-derived signal against a reference threshold because it provides two independent differential-comparison channels and open-collector outputs. In a typical implementation, one channel compares a divided battery voltage with a reference and the other performs a second threshold or direction check. The verified supply range of 2.0 V to 36 V supports battery-system architectures, but the exact divider values, comparator offset, input limits, and hysteresis must be selected from the complete manufacturer datasheet.
Recomendado
Overvoltage and Undervoltage Detection
The LM293H can provide separate high and low rail-threshold indications by assigning its two differential channels to different divided signals and references. The open-collector outputs can pull up logic rails or warning inputs when a threshold is exceeded. With a verified 2.0 V to 36 V operating range and low offset voltage listed as low as 2.0 mV maximum, it fits threshold-oriented industrial and embedded designs, subject to confirmed common-mode, supply, and temperature limits.
Recomendado
Industrial Sensor Thresholding
The LM293H can compare a conditioned sensor signal with a reference to produce a digital alarm or control event. Its two independent channels allow two sensor thresholds or a differential decision to be implemented in one 8-pin through-hole package. Open-collector outputs are useful with pulled-up industrial logic, while the low-power general-purpose architecture helps avoid unnecessary conversion stages. Input common-mode range, hysteresis, propagation delay, and output-current requirements must be verified before production.
Recomendado
Temperature Limit Signaling
The LM293H can generate high or low digital signals when a temperature-derived voltage crosses an upper or lower limit. One channel may indicate an over-temperature condition and the other an under-temperature or ready condition. The open-collector architecture simplifies connection to alert inputs, relay drivers, or pulled-up microcontroller logic. Because the supplied data does not provide guaranteed propagation delay or temperature-specific limits, the sensor characteristic, resistor network, hysteresis, and system timing must be checked against the current datasheet.
Recomendado
Current-Sense Limit Detection
The LM293H can compare the amplified output of a current-sense stage with a reference to identify overload or short-circuit conditions. A pair of channels can support directional, upper-limit, and lower-limit decisions while keeping the logic output open-collector. The device family is identified as low-power and general-purpose, but the design must verify input common-mode behavior around the current-sense amplifier output and confirm output timing for protection requirements. External filtering and pull-up selection remain application-specific.
Recomendado
Embedded Control and Logic Interfacing
The LM293H can translate analog threshold decisions into pulled-up digital signals for embedded control systems. Its two channels permit independent comparisons without requiring two separate comparator packages, and the TO-99-8 through-hole format suits legacy or through-hole industrial boards. The open-collector output must be paired with a suitable pull-up resistor and logic voltage. Exact pin functions, input limits, output sink current, and propagation delay should be verified against the manufacturer datasheet.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM293H — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM293H/NOPB | LM2903H | LM393H | LM2902H | LM339H |
|---|---|---|---|---|---|---|
| Package | TO-99-8 | TO-99-8 | TO-99-8 | TO-99-8 | TO-99-8 | TO-99-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
Principais diferenciais
- Verified dual differential-comparator configuration (vs LM393H)
- Wide supply capability for single- or dual-supply designs (vs LM2903H)
- Rail-to-rail common-mode labeling (vs LM2902H)
- TTL, MOS, and CMOS interface compatibility (vs LM339H)
Notas de projeto
Do not assume that an open-collector output can provide a valid high state without a pull-up resistor. Choose the pull-up voltage to match the driven TTL, MOS, or CMOS interface, and verify that the resistor value satisfies both the comparator sink-current limit and the required logic rise time. The verified data identifies open-collector outputs but does not provide the sink-current limits, so consult the current TI datasheet before finalizing the network.
For threshold measurements, keep the comparator input traces short and connect the reference and signal grounds according to the system’s return-current strategy. Add local filtering where sensor noise could shift the crossing point, and use hysteresis or positive feedback when a noisy or slowly changing input would otherwise cause repeated output transitions. The supplied data does not quantify propagation delay or input bias current, so timing calculations require the manufacturer limits.
Although the LM293H is described as a low-power comparator, the exact maximum supply current, output dissipation, and operating temperature range are not included in the verified search data. Calculate worst-case dissipation from the actual supply voltage, load, output state, and pull-up current, then confirm the permitted operating temperature and any package thermal limitations in the manufacturer documentation. Do not use an estimated thermal value as a production specification.
The TO-99-8 package is a through-hole metal-can style package rather than a surface-mount land pattern. Confirm mechanical hole spacing, lead diameter, pin orientation, and insertion clearance against the current package drawing before PCB layout. Keep the comparator close to the sensed input and reference components when trace noise or propagation timing matters, and provide adequate clearance from nearby high-voltage nodes.
Informações de conformidade
The supplied verified data identifies LM293 as an industrial-grade dual comparator but does not provide RoHS, REACH, halogen-free, lead-free, or conflict-minerals declarations. No compliance status should be inferred from the family description.
