LM393PWRG4 - Dual Open-Collector Comparator | Texas Instruments
N.º da peça: LM393PWRG4 ✓ AtivoLM393PWRG4 Visão geral
The open-collector output stage is the key feature of the LM393PWRG4. Each output can sink current when the comparator condition is met, but it requires an external pull-up resistor to establish a high voltage. This architecture works with TTL, MOS, and CMOS logic families and allows the output level to be selected by the system designer. The two channels are electrically independent, so each comparator can monitor a different signal, threshold, or protection condition within the same package.
Typical electrical characteristics include low input offset voltage, low input bias current, and supply-current drain that is independent of supply voltage. The verified manufacturer listing identifies the part as a standard general-purpose comparator with rail-to-rail input capability and open-collector outputs. The open-collector topology also enables wired-AND behavior when multiple comparator outputs are connected together, provided each output has an appropriate pull-up and the resulting current budget is respected.
Common applications include sensor-interface thresholding, battery and power-supply monitoring, window comparator circuits, overvoltage and undervoltage protection, temperature-control systems, and logic-level translation. Because the outputs are open collector, a design can select the pull-up voltage independently from the comparator supply voltage, which is useful when interfacing to a higher-voltage logic domain. The comparator inputs should remain within the specified common-mode range, and the unused channel inputs must be connected appropriately rather than left floating.
When designing around the LM393PWRG4, start by assigning each channel to a sensing function and defining the pull-up voltage and sink-current requirement. Place the pull-up resistors close to the output pins, maintain adequate copper and thermal margin around the TSSOP, and verify that the input bias currents do not disturb high-impedance sensor nodes. This page combines manufacturer characteristics, package information, application guidance, drop-in alternatives, and design notes for faster component selection.
Alternativas drop-in para LM393PWRG4 — 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 LM393PWRG4 (mesmo formato e footprint) — diferindo em Comparator Type, Number of Channels, Supply Current.
LM393APWRG4
✅ Drop-InConsulte o preço
Ver ficha técnica →LM393BPWRG4
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LMV393DR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM393PWRG4 Classificações máximas e características elétricas
| Comparator Type | Dual differential comparator |
| Number of Channels | 2 |
| Tipo de saída | Open-collector |
| Supply Configuration | Single or dual supply |
| Dual-Supply Total Voltage Range | 2 V to 36 V |
| Common-Mode Input Range | Includes ground |
| Differential Input Voltage Range | Equal to maximum-rated supply voltage |
| Input Offset Voltage | 0.37 mV maximum on improved B-version family specifications |
| Input Bias Current | 3.5 nA maximum on improved B-version family specifications |
| Corrente de alimentação | 200 µA per comparator on improved B-version family specifications |
| Response Time | 1 µs on improved B-version family specifications |
| ESD Rating HBM | 2 kV on improved B-version family specifications |
| Output Compatibility | TTL, MOS, and CMOS |
| Encapsulamento | 8-pin TSSOP |
| Tipo de montagem | Surface mount |
Configuração de pinos do LM393PWRG4
| Pino 1 | 1OUT — Open-collector output of comparator 1 |
| Pino 2 | 1IN- — Inverting input of comparator 1 |
| Pino 3 | 1IN+ — Non-inverting input of comparator 1 |
| Pino 4 | GND — Ground reference |
| Pino 5 | 2IN+ — Non-inverting input of comparator 2 |
| Pino 6 | 2IN- — Inverting input of comparator 2 |
| Pino 7 | 2OUT — Open-collector output of comparator 2 |
| Pino 8 | VCC — Positive supply voltage |
Aplicações típicas
LM393PWRG4 é adequado para 6 aplicaçãos: Battery Voltage Monitoring, Overvoltage and Undervoltage Protection, Sensor Threshold Conditioning, Temperature Control and Fan Drive, Window Comparator for Valid Range, TTL, MOS, and CMOS Logic Interfacing.
Battery Voltage Monitoring
The LM393PWRG4 is suitable for detecting upper and lower battery thresholds because it combines two independent channels, single-supply operation, and an input common-mode range that includes ground. Place one channel across an upper threshold and the other across an undervoltage threshold, then use the open-collector outputs with pull-up resistors to drive a controller or fault indicator. Because the output stage sinks current rather than sourcing it, the pull-up voltage can be selected independently of the comparator supply. Check the battery range against the absolute maximum and common-mode limits, and ensure the sensor divider does not exceed the input bias-current error budget.
Recomendado
Overvoltage and Undervoltage Protection
The dual differential architecture of the LM393PWRG4 supports independent overvoltage and undervoltage decisions in power systems. Each channel compares a divided feedback voltage with a reference, while the open-collector outputs can be wired together or connected to separate fault inputs. The pull-up network sets the logic-high level and determines the available sink current, so it should be selected against the downstream input load. Keep the feedback divider close to the comparator pins to reduce noise pickup, and account for input offset voltage when defining the protection thresholds.
Recomendado
Sensor Threshold Conditioning
The LM393PWRG4 can convert an analog sensor signal into a logic decision when the signal remains within the specified common-mode range. The two independent channels allow two thresholds or two sensor inputs to be handled in one package, reducing board area compared with separate single comparators. Open-collector outputs are useful with pull-ups that match the system logic, and the low input bias current helps when the sensing divider has high source impedance. For slow or noisy sensors, add filtering and avoid placing long high-impedance traces beside the input pins.
Recomendado
Temperature Control and Fan Drive
In temperature-control systems, the LM393PWRG4 can compare a thermistor-derived voltage with a setpoint and provide a logic output for a controller or driver stage. One channel can handle a heating threshold and the other a cooling threshold, simplifying the layout. Because the output is open collector, a transistor or MOSFET can be driven using a pull-up network, while the comparator itself handles the sensing decision. Select the external transistor and pull-up resistor for the required load current, and ensure the temperature sensor divider does not create excessive error from input bias current.
Recomendado
Window Comparator for Valid Range
The LM393PWRG4 can implement a window comparator by assigning one channel to the lower limit and the other to the upper limit of an acceptable input range. Each channel compares its input against a reference and drives an open-collector output. Pull-up resistors allow the logic-high voltage to match the system, while combining the outputs can provide a valid-range indication. The threshold accuracy depends on the reference network and the comparator’s input offset voltage, so use matched resistors and test the actual switching points across temperature and supply variation.
Recomendado
TTL, MOS, and CMOS Logic Interfacing
The open-collector output architecture makes the LM393PWRG4 useful for logic-level interfacing where the required output-high voltage differs from the comparator supply voltage. External pull-up resistors can connect the outputs to TTL, MOS, or CMOS domains, and multiple outputs can be combined in a wired-AND arrangement when their current ratings permit. The manufacturer identifies compatibility with TTL, MOS, and CMOS outputs. Confirm the logic family’s input thresholds, the allowable output sink current, and the maximum signal transition rate before finalizing the pull-up value.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM393PWRG4 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM393APWRG4 | LM393BPWRG4 | LMV393DR |
|---|---|---|---|---|
| Comparator Configuration | Dual differential comparator | Dual differential comparator | Dual differential comparator | Dual differential comparator family |
| Package | 8-TSSOP | 8-TSSOP - same package | 8-TSSOP - same package | SOIC-8 - not same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
Principais diferenciais
- Two independent comparator channels in one package (vs LMV393DR)
- Open-collector output flexibility (vs LM393APWRG4)
- Wide dual-supply operating capability (vs LMV393DR)
Notas de projeto
Treat each open-collector output as a current sink, not as a push-pull logic driver. Select the pull-up resistor from the required high-level voltage, input load current, output leakage, and transition-speed requirements. Keep the pull-up close to the output pin, and ensure the maximum output sink current is not exceeded when multiple open-collector outputs are wired together.
Place input, output, and supply connections to minimize loop area and keep sensitive high-impedance input traces away from noisy switching nodes. Connect the unused comparator inputs to a defined common-mode voltage rather than leaving them floating. Maintain a low-impedance ground return and follow the manufacturer’s TSSOP land pattern for the LM393PWRG4 package.
Do not interpret the open-collector output as driving a valid high state without a pull-up. Also do not allow either input to exceed the absolute maximum ratings, including when the supply is absent. Verify the common-mode input range at the lowest and highest expected rail voltages, since a comparator can be within its supply voltage while still operating outside its valid input range.
For slow sensor thresholds, add appropriate filtering at the input to prevent switching noise from repeatedly changing the output. For faster systems, keep feedback and input traces short, use a suitable pull-up value, and account for parasitic capacitance at the open-collector node. The manufacturer’s improved family response-time figure is 1 µs, so do not assume suitability for signals faster than the verified specification.
Informações de conformidade
The verified source material identifies the LM393 family, package, electrical characteristics, and cross-reference candidates but does not state a specific compliance declaration for LM393PWRG4.
