LM393PWRG3 - Dual Open-Collector Comparator | Texas Instruments
MPN: LM393PWRG3 ✓ Hoạt độngLM393PWRG3 Tóm tắt
A comparator is an analog semiconductor that compares two voltages and produces a logic-level indication of their relative relationship. The LM393 family belongs to the wider comparator hierarchy, which falls under linear and analog integrated circuits used for signal conditioning, threshold detection, supervision, and protection. Unlike an operational amplifier, the LM393 uses open-collector outputs that require an external pull-up resistor when driving a digital or mixed-signal circuit.
The principal features of the LM393PWRG3 are its two independent comparator channels, 36 V maximum supply capability, differential input structure, open-collector outputs, and approximately 0.3 microsecond response time. The open-collector architecture permits a wired-AND arrangement when multiple comparator outputs share a pull-up node. Its output is compatible with TTL, MOS, and CMOS systems according to the Texas Instruments LM393 family documentation.
The comparator channels operate independently, allowing one device to implement two threshold checks, two window-limit functions, or a pair of sensor comparisons. A single 2 V to 36 V supply can be used, and dual-supply operation is also possible when the supply arrangement and voltage relationships satisfy the family requirements. Designers must account for the open-collector output's pull-up network, input common-mode behavior, supply bypass capacitance, and output-sinking limits when laying out the circuit.
Typical uses include overvoltage and undervoltage detection, battery and power-supply monitoring, sensor threshold conditioning, motor or actuator protection, industrial control interfaces, and logic-level qualification. The same 8-pin TSSOP footprint also supports compact analog and embedded-control designs where two comparator functions are needed without allocating space for separate single-channel devices.
For robust implementation, place the supply bypass capacitor close to VCC and connect the ground reference directly to the exposed ground pathway. Select the external pull-up resistor to balance rise time, power consumption, and the output's current-sinking capability. Confirm input levels, output timing, supply range, and operating temperature against the manufacturer datasheet before releasing a production design.
This page combines the exact ordering information, functional characteristics, package details, application guidance, and drop-in comparison information needed to evaluate the LM393PWRG3. It also highlights practical differences among documented alternatives so engineers can select the appropriate comparator without overlooking pull-up requirements or channel-specific constraints.
Bộ thay thế dễ dàng lắp đặt cho LM393PWRG3 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM393PWRG3 (cùng hình factor và footprint) — khác nhau ở Comparator Type, Supply Current.
LM393PWRG4
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Xem tài liệu →LM393PWRG3 Tỷ lệ tối đa & tính chất điện
| Comparator Type | General-purpose differential comparator |
| Number of Elements | 2 |
| Supply Voltage Range | 2 V to 36 V |
| Differential Supply Voltage Range | ±1 V to ±18 V |
| Kiểu đầu ra | Open-collector |
| Input Type | Differential |
| Common-Mode Input Capability | Rail-to-rail |
| Điện áp cung cấp | 2.5 mA |
| Propagation Delay | 0.3 us |
| Tested Supply Voltage | 30 V |
| Tested Supply Voltage for Non-V Devices | 32 V |
| Output Compatibility | TTL, MOS, and CMOS |
| Supply Configuration | Single or dual supply |
| Hộp | 8-pin TSSOP |
| Package Width | 0.173 in (4.40 mm) |
| Kiểu lắp đặt | Surface mount |
| Shipping Option | Tape and reel |
Cấu hình chân LM393PWRG3
| Chân 1 | OUT1 — Open-collector output of comparator 1 |
| Chân 2 | IN1- — Inverting input of comparator 1 |
| Chân 3 | IN1+ — Noninverting input of comparator 1 |
| Chân 4 | GND — Ground connection |
| Chân 5 | IN2+ — Noninverting input of comparator 2 |
| Chân 6 | IN2- — Inverting input of comparator 2 |
| Chân 7 | OUT2 — Open-collector output of comparator 2 |
| Chân 8 | VCC — Positive supply connection |
Ứng dụng tiêu biểu
LM393PWRG3 phù hợp cho 6 Áp dụngs: Industrial 24 V Overvoltage Monitoring, Battery Pack Threshold Detection, Sensor Signal Conditioning, Power-Supply Sequencing, Motor and Actuator Protection, Logic-Level Qualification.
Industrial 24 V Overvoltage Monitoring
The LM393PWRG3 is suitable for monitoring a nominal 24 V industrial rail because its documented single-supply range is 2 V to 36 V. One channel can compare a scaled supply voltage with a reference and pull its open-collector output low when the upper threshold is exceeded. The second channel can implement an undervoltage or window-limit condition. Because industrial wiring can experience transients, add appropriately rated protection and confirm that every input remains within the manufacturer's absolute-maximum limits. The external pull-up resistor should be selected for the logic rail and the required protection response time.
Được đề xuất
Battery Pack Threshold Detection
The two independent channels in the LM393PWRG3 can monitor separate battery-pack thresholds, such as an undervoltage event and an overcharge event, without using two single comparator packages. Its 2 V to 36 V supply range accommodates many low-voltage battery systems, while the approximately 0.3 microsecond propagation delay provides quick fault signaling. Connect the open-collector outputs to separate pull-ups and the system controller's suitable interrupt or status inputs. Account for battery chemistry, resistor tolerances, input offset, and transient energy when choosing the divider and protection components.
Được đề xuất
Sensor Signal Conditioning
The LM393PWRG3 can convert a conditioned sensor voltage into a digital threshold event when the signal crosses a programmed reference. One channel may compare an amplified sensor signal with a setpoint, while the other can monitor a complementary sensor or establish a second fault level. Its differential inputs support comparisons between related voltages rather than requiring every signal to be referenced directly to ground. Keep sensor traces away from switching nodes, provide a stable reference, and account for input offset and noise around the threshold to avoid repeated output toggling.
Được đề xuất
Power-Supply Sequencing
The two independent LM393PWRG3 channels can supervise two rails and generate discrete fault or sequence-control signals for a power-management circuit. Each open-collector output can be pulled up to the logic rail used by a controller, allowing wired-AND fault reporting when the outputs share a pull-up node. The approximately 0.3 microsecond propagation delay is suitable for ordinary supply-state qualification, although slower power ramps and hysteresis requirements must be evaluated separately. Use resistor dividers and capacitor timing networks that preserve adequate noise margin throughout startup.
Được đề xuất
Motor and Actuator Protection
The LM393PWRG3 can implement fast, discrete protection for a motor, solenoid, or actuator by comparing a scaled drive voltage or current-sense signal against a limit. Its approximately 0.3 microsecond propagation delay helps minimize the interval between threshold detection and a shutdown signal. The open-collector output can pull down an interlock line through a suitable pull-up network, allowing the result to combine with other fault conditions. Protection still depends on external sensing accuracy, filtering, isolation from switching transients, and shutdown timing that meets the mechanical system's requirements.
Được đề xuất
Logic-Level Qualification
The LM393PWRG3 can qualify a noisy or analog control node before it enters a digital logic system. A divided input is compared with a reference, and the open-collector output changes state only when the input crosses the defined threshold. Adding positive feedback creates hysteresis and prevents chatter when the input slowly moves around the threshold. Choose the pull-up voltage to match the receiving logic, keep the threshold network close to the comparator, and isolate it from high-current switching paths. The output's open-collector form requires a pull-up even when driving a CMOS or TTL input.
Được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM393PWRG3 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM393PWRG4 |
|---|---|---|
| Package | 8-TSSOP | 8-TSSOP |
| Brand | Texas Instruments | Texas Instruments |
| Comparator Elements | 2 | 2 |
| Supply Voltage Range | 2 V to 36 V | 2 V to 36 V |
| Output Type | Open-collector | Open-collector |
| Input Type | Differential | Differential |
| Common-Mode Input Capability | Rail-to-rail | Rail-to-rail |
| Propagation Delay | 0.3 us | 0.3 us |
| Supply Current | 2.5 mA | 2.5 mA |
Bảo phân biệt quan trọng
- Two independent general-purpose channels in one package (vsLM393PWRG4)
- Broad single-supply operating range (vsLM393PWRG4)
- Open-collector outputs support wired fault logic (vsLM393PWRG4)
Ghi chú thiết kế
Place a local supply-bypass capacitor at the LM393PWRG3 VCC pin and route it directly to the device ground reference. The open-collector outputs each need an external pull-up resistor; select that resistance using the receiving logic's high-level voltage, the comparator's allowed output-sink current, and the required rise time. A smaller pull-up produces faster edges but increases supply current during output-low intervals, while a larger pull-up reduces power consumption but can slow edges and increase susceptibility to capacitive loading.
Keep the comparator inputs, reference network, and feedback components away from inductors, switching nodes, and high-current return paths. Use a compact ground connection and avoid routing the input traces beneath or alongside power-conversion circuits. When creating hysteresis with positive feedback, keep the feedback resistor close to the relevant input and account for input offset and noise. Review the manufacturer datasheet pin description and application diagrams before finalizing the TSSOP footprint and exposed or adjacent ground routing.
Do not assume an open-collector output can provide a valid logic-high voltage without a pull-up. Also avoid using the LM393PWRG3 outside its documented 2 V to 36 V supply range or absolute-maximum input limits. Differential input voltage, common-mode input range, output current, and temperature conditions must all be checked for the actual operating state. For industrial or automotive-like environments, add external transient protection rather than relying on the comparator itself to absorb surge energy.
Thông tin tuân thủ
The available product information identifies the G3 ordering option but does not explicitly state the requested compliance attributes.