LM393F-E2 - Dual Ground-Sense Comparator | ROHM
MPN: LM393F-E2 ✓ فعالLM393F-E2 جائزہ
A comparator is a semiconductor that evaluates two input voltages and changes its output state according to their relationship. The dual ground-sense comparator belongs to the comparator IC, analog signal-conditioning, and power-management IC hierarchy. Its open-collector architecture requires an external pull-up resistor, making it useful for wired logic levels, system fault signaling, and interfaces where active-low signaling is preferred.
The LM393F-E2 supports a wide 3 V to 32 V operating supply range and features low supply current. These characteristics suit industrial control, instrumentation, power-supply supervision, and general-purpose signal conditioning. Because the outputs are open collector, multiple comparators can share a pull-up node when the design requires wired logic behavior, provided timing, sink-current, and fault-state requirements are checked.
The two channels are intended for general-purpose comparison rather than rail-to-rail precision operation. Input common-mode limits, offset voltage, propagation delay, output-current capability, and electrical characteristics vary with supply voltage and temperature. These operating dependencies should be considered when selecting comparator gain, resistor values, and switching thresholds. The SOP outline also requires attention to copper area, thermal dissipation, and clean routing of the high-impedance comparison inputs.
Typical uses include monitoring a divided battery voltage, detecting overvoltage or undervoltage conditions, checking a sensor signal against a reference, and generating an active-low fault indication. The same topology also works for industrial control thresholds and simple automotive or appliance protection circuits when the operating temperature and qualification requirements are suitable.
Use the pin-description table in the ROHM manufacturer datasheet when assigning PCB tracks and pull-up components. Pay particular attention to the common supply pins and output pull-up topology; incorrect output-state assumptions or unsuitable pull-up values can create excessive sink current, slow transitions, or an unintended system fault indication.
This page combines package-specific pin information, comparison data, drop-in replacement analysis, application guidance, and practical design notes for engineers evaluating the LM393F-E2 in analog threshold-detection and power-management systems.
کے لیے ڈراپ اِن متبادل LM393F-E2 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں LM393F-E2 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Comparator Type, Package, Output Type, Number of Channels, Total Pin Count.
LM2903M
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ڈیٹا شیٹ دیکھیں →LM393F-E2 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Comparator Type | Dual ground-sense comparator |
| Number of Channels | 2 channels |
| Operating Supply Voltage Range | 3 V to 32 V |
| آؤٹ پٹ کی قسم | Open collector |
| پیکیج | 8-SOP |
| ماؤنٹنگ ٹائپ | Surface mount |
| Total Pin Count | 8 pins |
| Input Type | Differential, 2 inputs per comparator channel |
LM393F-E2 پن کنفیگریشن
| پن 1 | OUT1 — Comparator channel 1 open-collector output |
| پن 2 | IN1- — Comparator channel 1 inverting input |
| پن 3 | IN1+ — Comparator channel 1 non-inverting input |
| پن 4 | GND — Ground connection |
| پن 5 | IN2+ — Comparator channel 2 non-inverting input |
| پن 6 | IN2- — Comparator channel 2 inverting input |
| پن 7 | OUT2 — Comparator channel 2 open-collector output |
| پن 8 | VCC — Positive supply connection |
عام استعمالات
LM393F-E2 کے لیے موزوں ہے 6 ایپلیکیشنs: Battery Voltage Monitoring, Overvoltage and Undervoltage Protection, Industrial Sensor Signal Conditioning, Power Supply Fault Indication, Temperature and Analog Limit Detection, Appliance and Equipment Protection.
Battery Voltage Monitoring
The LM393F-E2 fits battery threshold monitoring because its two independent channels can supervise separate divided supply voltages while operating across a 3 V to 32 V range. A resistor divider scales the battery voltage into the allowable input window, and each open-collector output changes state when its threshold is crossed. An external pull-up creates a clear active-low fault signal for an MCU, while the second channel can monitor a redundant or secondary rail. Confirm the common-mode range, output sink current, and actual battery transient at the selected operating point before finalizing the divider and pull-up values.
تجویز کردہ
Overvoltage and Undervoltage Protection
The LM393F-E2 can implement separate overvoltage and undervoltage protection channels in an industrial power supply. Each comparator evaluates a divided feedback voltage against a reference, and the open-collector outputs can pull down a shared fault line when either limit is violated. The wide 3 V to 32 V supply range accommodates many protected DC systems, while low supply current supports compact control boards. Design the reference network for adequate noise margin, use a pull-up that does not exceed the output sink-current limit, and verify the input common-mode range over temperature and supply tolerance.
تجویز کردہ
Industrial Sensor Signal Conditioning
The LM393F-E2 is useful for converting a slowly varying sensor signal into a digital threshold event. The first channel can compare a divided sensor output with a reference, while the second provides another limit or alarm. Its open-collector output can directly drive a pull-up and digital input, and its two-channel organization reduces the number of comparator packages required on a control board. Account for input offset, common-mode limits, and propagation delay in the system timing. Keep the high-impedance input traces short, isolate them from switching nodes, and select resistor values that balance noise immunity against input loading.
تجویز کردہ
Power Supply Fault Indication
The LM393F-E2 can supervise a regulated power rail and produce an active-low fault indication without an additional output driver. A divider maps the rail voltage to the comparator input, and an external pull-up returns the output to a defined high state during normal operation. The second channel can monitor a second rail or a sequenced supply condition. Its 3 V to 32 V operating range supports broad supply supervision, and the open-collector architecture simplifies wired fault signaling. Verify the threshold accuracy over temperature and supply variation, ensure the pull-up voltage remains within the output ratings, and account for response delay when the protected system requires a rapid shutdown.
تجویز کردہ
Temperature and Analog Limit Detection
The LM393F-E2 can perform a simple limit check on an analog temperature or process-control signal. A sensor front end scales the measured value into the comparator input range, and the two channels establish upper and lower limits. The open-collector outputs provide active-low limit flags that can be combined at a common pull-up node. This arrangement is useful when the system does not require an analog output and only needs threshold information. Select the divider and reference so the crossing point includes sensor and resistor tolerances, keep both inputs within the common-mode range, and avoid excessive output capacitance because it can slow the open-collector transition during fault events.
تجویز کردہ
Appliance and Equipment Protection
The LM393F-E2 supports compact protection logic in appliances and general-purpose equipment by detecting abnormal voltage or sensor conditions. One channel can monitor a critical supply while the other checks a door, level, or actuator-related signal. Its open-collector output can pull down a relay-driver, indicator, or controller input, and the 3 V to 32 V supply range suits many low-voltage control boards. Before deployment, verify the operating-temperature grade, input thresholds, and output sink current for the intended enclosure. Place the pull-up resistor near the receiving logic so that the fault signal remains defined during reset or wiring faults.
تجویز کردہ
کے لیے انجینئرنگ ریفرنس ڈیٹا LM393F-E2 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | LM2903M |
|---|---|---|
| Package | 8-SOP | 8-SOP |
| Brand | ROHM Semiconductor | ROHM Semiconductor |
| Comparator Channels | 2 channels | 2 channels |
| Operating Supply Voltage Range | 3 V to 32 V | 3 V to 32 V |
| Output Type | Open collector | Open collector |
| Comparator Function | Ground sense | Ground sense |
اہم امتیازی خصوصیات
- Two independent comparator channels in one package (بمقابلہLM2903M)
- Open-collector output enables active-low fault signaling (بمقابلہLM2903M)
- Compact integration for dual-threshold designs (بمقابلہLM2903M)
ڈیزائن نوٹس
Do not treat the open-collector output as a push-pull logic output. Each output requires an external pull-up resistor, and the pull-up voltage, resistor value, output capacitance, and required sink current must be checked together. A pull-up that is too low can overload the output transistor, while one that is too high combined with a long PCB trace can produce slow transitions and susceptibility to noise.
Route the inverting and non-inverting inputs as short, quiet nets and keep them away from switching nodes, power inductors, and high-current return paths. Connect the supply and ground pins with short traces and place local bypassing close to the device. Because the inputs are sensitive to small voltage differences, long parallel runs near digital or switching signals can change the comparator decision point.
Size the external pull-up and threshold-divider networks against the output sink-current and input-bias limits. If the pull-up also supplies an LED, relay input, or digital-load current, include that load in the worst-case output-current calculation. Confirm that the divided signal remains inside the comparator input common-mode range at the minimum and maximum supply voltages.
The SOP package requires adequate copper and thermal-path design when supply dissipation is significant. Keep the ground connection short and provide a continuous ground plane where practical. Review the manufacturer thermal information for the exact mounting method, because junction temperature depends on package construction, copper area, airflow, and the difference between supply voltage and output-node voltage.
تعمیل کی معلومات
Compliance status was not identified in the available manufacturer and distributor information and requires confirmation from the current ROHM product documentation or a written supplier declaration.
