LM393ADRE4 - Dual 36V Open-Collector Comparator | Texas Instruments
MPN: LM393ADRE4 ✓ NakahandaLM393ADRE4 Ulas
A comparator is an analog integrated circuit that evaluates two voltages and produces a digital logic state indicating which input is higher. The LM393A belongs to the broader comparator hierarchy within analog and mixed-signal semiconductors. Its open-collector architecture makes it particularly useful when a circuit needs a wired logic function, level translation, system reset, or an externally defined pull-up voltage rather than a fixed active push-pull output.
The principal features of the LM393ADRE4 are its dual-channel configuration, wide 2 V to 36 V operating range, rail-to-rail input capability, and open-collector outputs. The 300 ns propagation delay makes it suitable for general-purpose threshold detection, signal conditioning, and monitoring functions. The 8-SOIC body is specified at 0.154 inch, or 3.90 mm, width, supporting conventional surface-mount PCB assembly and existing SOIC-8 layouts.
Each channel compares a non-inverting input against an inverting input. The output transistor is pulled low when the non-inverting input is higher than the inverting input and releases to a high impedance when the opposite condition applies. Because the output is open collector, the output high voltage is not internally fixed; it is established by an external pull-up resistor and the available supply. This feature allows several open-collector outputs to share a bus, but it also requires correct pull-up selection and compatible system levels.
Typical uses include overvoltage and undervoltage monitoring, battery threshold detection, sensor signal conditioning, window comparison, relay or LED drive, and general logic interfacing. The wide supply range is useful in industrial control systems where the comparator may operate from a rail substantially higher than a 5 V logic system. When dual supplies are used, the total supply difference must remain within the device operating limits.
PCB implementation should follow the manufacturer pinout and place the comparator input and output tracks away from switching nodes and high-current paths. Keep the open-collector pull-up resistor close to the output node to limit rise time and susceptibility to capacitive coupling. Confirm input common-mode limits, output pull-up voltage, and logic-family compatibility before replacing a device in an existing design.
This page consolidates the LM393ADRE4 ordering information, technical characteristics, replacement guidance, and application-focused design considerations into one engineering reference. It also distinguishes genuine same-footprint replacements from options that require package, voltage, or logic-architecture changes, helping designers select a compatible device without relying on package naming alone.
Mga alternatibo na pwedeng ilagay na LM393ADRE4 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok LM393ADRE4 (parehas na form factor at footprint) — pagkakaiba sa Output Type, Input Common-Mode Range, Operating Temperature Range, Package, Propagation Delay.
LM393AD
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM393ADR
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2903BIDR
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LMV393
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
LM393ADRE4 Mga Pinakamataas na Rating at Electrical Characteristics
| Comparator Type | Dual differential comparator |
| Number of Channels | 2 channels |
| Supply Voltage Range | 2 V to 36 V |
| Propagation Delay | 300 ns |
| Type ng Output | Open collector |
| Input Common-Mode Range | Rail-to-rail |
| Package Type | 8-SOIC |
| Bilang ng Pins | 8 pins |
| Package Width | 0.154 inch (3.90 mm) |
| Uri ng Pagpapasok | Surface mount |
| Product Grade | Industrial grade |
Gabay sa Pin Configuration ng LM393ADRE4 0.154 inch (3.90 mm)
Pin configuration para sa LM393ADRE4 (0.154 inch (3.90 mm) package). Ang analog component na ito ay may input, output, at power supply pins. Sumangguni sa datasheet ng manufacturer para sa offset null, compensation, at enable pin configurations. Perpekto para sa signal conditioning at amplifier circuits.
Wala ng detalyadong pinout data na magagamit para sa LM393ADRE4.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
LM393ADRE4 ay nararapat para sa 6 aplikasyons: Industrial Voltage Monitoring, Battery Threshold Detection, Sensor Signal Conditioning, Window Comparator Control, Relay and LED Status Interface, Logic Level Translation.
Industrial Voltage Monitoring
The LM393ADRE4 fits industrial voltage-monitoring functions because its two independent channels can compare divided supply voltages against a reference, and its 2 V to 36 V operating range covers many control rails. Place one channel in an overvoltage detector and the other in an undervoltage detector, using open-collector outputs for relay, alarm, or reset signaling. The 300 ns response is rapid for threshold events. Because the outputs are open collector, external pull-up resistors set the logic voltage, while the long 8-SOIC body supports conventional industrial PCB assembly.
Inirekomenda
Battery Threshold Detection
The LM393ADRE4 can monitor a divided battery voltage against a reference because its inputs support rail-to-rail comparison and the device operates from 2 V to 36 V. One channel can detect an upper discharge threshold while the other detects a lower threshold, creating a battery window without requiring two separate packages. Its open-collector outputs can pull up a system-enable or charger-status line. Account for offset voltage and resistor tolerance, and choose the pull-up voltage so the output remains compatible with the monitored system.
Inirekomenda
Sensor Signal Conditioning
The LM393ADRE4 is useful for converting a slowly varying sensor signal into a sharp logic decision. A resistive divider can bias the sensor signal onto the non-inverting input, while a reference enters the inverting input; the open-collector output then identifies when the threshold is crossed. The 300 ns propagation delay is more than sufficient for many temperature, light, and level sensors. Rail-to-rail input comparison helps simplify single-supply interfacing, but the circuit must provide suitable reference accuracy and an output pull-up.
Inirekomenda
Window Comparator Control
The LM393ADRE4 naturally supports a window-comparator arrangement because it contains two independent differential channels. Use the first output to indicate that a signal is below the lower threshold and the second to indicate that it is above the upper threshold; combining the open-collector outputs can then produce an in-window or out-of-window function. The dual 8-SOIC package reduces board area compared with two discrete comparator packages. Resistor matching and input offset determine threshold accuracy, so use suitable precision resistors and account for comparator delay in fast transitions.
Inirekomenda
Relay and LED Status Interface
The LM393ADRE4 can drive relay coils, indicator LEDs, or digital input stages through its open-collector outputs. A comparator decision determines whether current flows through the load and pull-up network, while the external resistor defines the high-state voltage. This is useful when the sensed threshold and the driven interface operate at different logic levels. Keep inductive loads properly suppressed and account for the open collector's need for a pull-up. The 300 ns switching time is well suited to ordinary control and status functions.
Inirekomenda
Logic Level Translation
The LM393ADRE4 can translate between logic domains because its open-collector output does not require a fixed internal high voltage. Pull the output to the destination logic supply so the high level is defined by that rail, while the comparator input side operates from a supply as high as 36 V. This arrangement is useful when a higher-voltage signal must control a lower-voltage digital system. Confirm that input thresholds, output pull-up current, rise time, and downstream tolerances are suitable, and avoid configurations requiring a push-pull output or an opposite-polarity output stage.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for LM393ADRE4 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | LM393AD | LM393ADR | LM2903 | LMV393 |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Comparator Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Supply Voltage Range | 2 V to 36 V | 2 V to 36 V | 2 V to 36 V | 2 V to 36 V | 2.7 V to 16 V |
| Product Positioning | Industrial grade | Industrial grade | Industrial grade | Automotive and industrial | Low-power CMOS |
Pangunahing mga Pagkakaiba
- Higher supported supply range than the CMOS LMV393 alternative (kumpara saLMV393)
- Direct same-family choice with the same listed key electrical ratings (kumpara saLM393AD)
- Stronger qualification positioning for automotive and industrial systems (kumpara saLM393ADRE4)
Talaan ng Disenyo
Calculate the open-collector pull-up network against both the output's sink-current limit and the destination logic input's leakage requirement. A lower pull-up value produces a faster rising edge but increases current when the output transistor is on; a higher value reduces power but slows the edge and increases susceptibility to capacitive coupling. The LM393ADRE4 operates from 2 V to 36 V, so the pull-up rail must also remain compatible with the destination device.
Place the pull-up resistor close to the comparator output to minimize the trace area exposed to capacitive coupling and switching noise. Keep the two input nets away from relay-coil wiring, switching-node copper, and other high dv/dt paths. Use the manufacturer pin-description table when assigning the two channels; the comparator inputs are high impedance, but long parallel input traces can still pick up noise and alter the switching threshold.
Do not treat the open-collector output as actively driven high. Without an external pull-up, the output can remain floating or rise only through stray capacitance, producing inconsistent logic behavior. Also verify the exact replacement suffix and package before substitution: the LM393 family, LM2903, and LMV393 share familiar dual-comparator functions, but their operating ranges, qualification, and implementation details differ.
For slow sensor signals, add hysteresis with positive feedback to prevent output chatter near the threshold. Use the 300 ns propagation delay as a useful timing reference for switching transitions, but include comparator offset and noise margin in the system design. Where an output drives more than one device, calculate the total pull-up current and bus capacitance so the rising edge remains within the receiving circuit's timing requirement.
Impormasyon ng Pagsunod sa Kautusan
The manufacturer identifies LM393A as an industrial-grade dual differential comparator family, but no specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status for LM393ADRE4 is stated in the referenced product information.
