LM393M - Dual Open-Collector Comparator | Texas Instruments
부품 번호: LM393M ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
LM393M 개요
What is a dual differential comparator? A comparator is an analog integrated circuit that compares two input voltages and produces a binary high-or-low result according to their relationship. A differential comparator includes both a non-inverting and an inverting input. The LM393M contains two such channels, making it useful for independent threshold decisions in one package. It belongs to the comparator, analog IC, and semiconductor hierarchy rather than being an amplifier; the output intentionally indicates which input is higher instead of reproducing an analog signal.
The key verified feature set includes two differential comparators, an 8-SOIC surface-mount package, open-collector outputs, a 1.4 microsecond response time, and a 2 V to 36 V comparator supply specification. The distributor comparison material also lists differential input and output-current information, while the supplied search results identify the device as suitable for general-purpose comparison. Because the output transistor is open collector, output high level depends on the pull-up resistor and supply rail, not on a push-pull output driver.
The two channels are independent, allowing the device to compare two separate sensor or control signals. The common open-collector output architecture can be useful in power-monitoring circuits where several comparator outputs must combine logically, provided the system uses suitable pull-up resistors and does not exceed the device's electrical limits. The SOIC-8 package supports conventional surface-mount assembly, while the dual channel count can reduce board area compared with two single comparators.
Typical applications include battery and power-supply monitoring, overvoltage and undervoltage protection, sensor threshold detection, industrial control logic, window or level monitoring, and general digital control systems. The 2 V to 36 V comparator supply range provides useful flexibility for industrial and embedded systems, although the complete operating conditions must be checked against the manufacturer datasheet.
A key design consideration is the open-collector output. Add a pull-up resistor to each output, choose its value with the required sink-current and rise-time limits in mind, and ensure that the downstream device accepts the resulting logic level. Do not assume that the output can source current independently. The input common-mode range, output saturation levels, supply current, and absolute maximum ratings are not fully specified in the supplied verified data and must be confirmed before design release.
This page combines the verified distributor identity, package information, comparator function, search-result specifications, available cross-reference sources, and practical design guidance. It does not invent unprovided offset, temperature, response-current, or compliance details; unavailable parameters are identified for engineering follow-up.
드롭인 대체품: LM393M — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LM393M (동일 폼 팩터 및 풋프린트) — 차이점: Package, Mounting Type, Output Type, Common-Mode Input Range, Operating Temperature Range.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LM393D
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$0.11 / 개
데이터시트 보기 →LM393N
✅ 드롭인✓ 재고 있음
$0.18 / 개
데이터시트 보기 →LM393M
✅ 드롭인✓ 재고 있음
가격 문의
데이터시트 보기 →LM393DR
✅ 드롭인✓ 재고 있음
$0.11 / 개
데이터시트 보기 →LM393B
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM393M 최대 정격 & 전기적 특성
| Product Type | Dual differential comparator |
| Number of Comparator Channels | 2 |
| 출력 유형 | Open-Collector |
| Comparator Class | Standard general purpose |
| Supply Voltage Range | 2 V to 36 V |
| Response Time | 1.4 microseconds |
| 패키지 | 8-SOIC |
| 핀 수 | 8 pins |
| 실장 유형 | Surface mount |
| Supply Configuration | Single or dual supply |
| Input Configuration | Differential input |
| Output Pull-Up | External pull-up resistor required |
| Output Current | 18 mA at 5 V |
| Case Style | SOIC-8 |
LM393M soic-8 핀 구성 가이드
LM393M(soic-8 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: LM393M.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
LM393M 적합 용도: 6 애플리케이션s: Battery Voltage Monitoring, Overvoltage and Undervoltage Protection, Industrial Sensor Threshold Detection, Window and Level Monitoring, Open-Collector Logic Interfacing, Portable and Low-Voltage Control.
Battery Voltage Monitoring
The LM393M fits battery threshold monitoring because it provides two independent differential comparator channels in one 8-SOIC package, with a verified 2 V to 36 V comparator supply range. Each channel can compare a resistor-divided battery signal against a reference threshold. The open-collector outputs can pull down separate status or fault lines, while pull-up resistors define the logic-high state. The 1.4 microsecond listed response time is useful for protection signaling, although actual response depends on input overdrive and load. Designers must confirm input common-mode range and supply-current limits in the manufacturer datasheet before selecting resistor values.
추천
Overvoltage and Undervoltage Protection
LM393M is appropriate for dual-rail protection because its two differential channels can independently monitor a positive and negative threshold condition. Place resistor dividers on the supply being monitored, compare each divided voltage with a reference, and use the open-collector outputs to control a shutdown, enable, or alarm input through pull-up resistors. The verified 1.4 microseconds response time provides a defined switching specification for fast threshold transitions. The key engineering constraint is that the input and output levels must remain within the verified supply and device ratings; no unverified common-mode or absolute-maximum values should be assumed.
추천
Industrial Sensor Threshold Detection
The LM393M can convert analog sensor outputs into digital threshold events for industrial control systems. One channel can monitor a process signal against an adjustable setpoint and the other can monitor a second sensor, alarm state, or complementary condition. Its differential input structure and dual-channel 8-SOIC package reduce component count while preserving independent decisions. The open-collector outputs are useful when the alarm must drive a pull-up-protected relay driver, optocoupler, or PLC input, but the pull-up rail and sink current must be checked. Verify input bias current, common-mode range, and output saturation from the official datasheet.
추천
Window and Level Monitoring
LM393M is useful for upper- and lower-bound monitoring because its two independent comparator channels can implement a window detector with one inverting input and one non-inverting input per threshold arrangement. Use resistor dividers or a reference network to establish upper and lower limits, then combine the open-collector states externally when a system-level fault indication is required. The 2 V to 36 V supply specification supports a range of industrial and embedded supply environments, but the monitored signal must remain inside the comparator input limits. The listed 1.4 microseconds response time helps minimize transition delay when the measured level crosses a threshold.
추천
Open-Collector Logic Interfacing
LM393M is well suited to simple logic interfaces where the output must connect to a pull-up-based digital bus, alarm system, or relay-control input. Each open-collector output can remain disconnected when not driving a load or can sink current from a selected pull-up rail, allowing the interface voltage to be chosen independently of the comparator supply within device constraints. This arrangement can simplify wired-AND behavior and level translation. The external resistor determines both the sink current and output rise time, so calculate it from the load capacitance, required logic current, and allowed output current rather than selecting a value blindly.
추천
Portable and Low-Voltage Control
LM393M can be considered for portable equipment when the system operates within the comparator's verified 2 V to 36 V supply range and the open-collector output is compatible with the load. The dual-channel architecture supports two threshold decisions without requiring two separate packages, which can save board area in a compact control board. Power consumption is not quantified in the supplied verified data, so battery-life calculations must use the manufacturer datasheet rather than an assumed supply-current value. Pull-up resistors should be selected to minimize static current while keeping switching timing acceptable for the target logic family.
추천
추천 제품 요약
엔지니어링 참조 데이터: LM393M — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LM393D | LM393N | LM393M | LM393DR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | STMicroelectronics | onsemi | Texas Instruments |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Comparator Channels | 2 | 2 | 2 | 2 | 2 |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
| Special Feature | Dual differential comparator | LM393-family comparator | Dual comparator | General-purpose comparator | LM393-family comparator |
주요 차별점
- Two independent comparator channels in one 8-SOIC package (vs LM393N)
- Open-collector output architecture (vs LM393M)
- 1.4 microsecond listed response time (vs LM393N)
- 18 mA output current at 5 V (vs LM393N)
설계 노트
Do not treat the LM393M output as a push-pull logic driver. Each open-collector output needs a pull-up resistor, and the resistor value determines the high-level current, output rise time, and permissible sink current. Check the downstream input current and load capacitance before choosing the pull-up network. The verified listing confirms the open-collector architecture but does not provide a complete output-current curve, so final resistor values must be checked against the manufacturer datasheet.
Keep the comparator input traces short and route them away from high-current switching nodes and noisy digital clocks. Place the input network and any reference components close to the relevant LM393M pins, while keeping the pull-up resistor close to the output pin to minimize parasitic capacitance. Because the supplied data does not include a complete pinout or recommended layout, verify the official package drawing and pin numbering during PCB release.
Use a supply rail within the verified 2 V to 36 V comparator range and confirm the input signals remain inside the device's allowed common-mode limits. For dual-supply designs, verify both positive and negative rail limits against the absolute maximum ratings. The verified search results do not provide quiescent current, input bias current, or exact common-mode limits, so these values must be obtained from the official datasheet before sizing the power budget.
규정 준수 정보
The supplied verified results do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. No compliance claim is inferred.
