TS374CD - Low-Power Quad CMOS Comparator | STMicroelectronics
부품 번호: TS374CD ✗ 단종TS374CD 개요
A voltage comparator is an analog semiconductor that compares two input voltages and changes its output state when the difference crosses a defined threshold. The TS374CD belongs to the comparator hierarchy within analog and interface ICs. Each channel has differential inputs, high input impedance, and an open-drain output that can pull a logic node low. When used with a pull-up resistor, the open-drain architecture supports wired logic, level translation, and direct interfacing with multiple open-drain devices.
The principal device characteristics include four independent channels, a typical input impedance of 10^12 ohms, a typical input bias current of 1 pA at 5 V, and a maximum quiescent current of 250 microamperes. The fast typical response time of 200 ns is useful for signal crossing, threshold detection, and control-loop applications where the comparator must react quickly after an input differential changes polarity. Open-drain outputs provide flexible system integration without driving the output high actively.
The TS374CD uses four independent precision voltage comparators implemented with STMicroelectronics silicon linear MOS technology. This process is intended to provide a favorable balance between consumption and operating speed. The very high input impedance reduces loading on the signals being measured, while the low typical bias current is beneficial when the comparator monitors high-impedance sensors or threshold networks. Because the output is open drain, its rising voltage is established by an external pull-up resistor rather than an internal active pull-up.
Typical applications include sensor-threshold detection, overvoltage and undervoltage monitoring, window comparison, zero-cross detection, industrial control logic, and general-purpose analog signal conditioning. Four channels can also be used as independent comparator elements in a compact design, reducing package count compared with discrete or single-channel implementations. A pull-up resistor should be selected according to the target logic family, bus capacitance, and required rise time.
When designing with the TS374CD, account for open-drain behavior and provide a suitable pull-up on every output used by downstream logic. Review input common-mode limits, supply range, output sink current, and propagation timing in the manufacturer datasheet before setting thresholds. Because this ordering code is listed as obsolete, confirm lifecycle status and obtain an approved replacement or a supported availability plan before beginning a new production design.
This product page organizes the TS374CD’s comparator architecture, electrical characteristics, practical applications, verified equivalent information, and design considerations. It also highlights the lifecycle constraint and distinguishes a documented cross-brand alternative from components that may use the same 14-pin footprint but differ in output behavior, supply limits, or logic compatibility.
드롭인 대체품: TS374CD — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
TLC374CD
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TS374CD 최대 정격 & 전기적 특성
| Comparator Type | Low-power differential CMOS voltage comparator |
| Number of Channels | 4 independent channels |
| Supply Configuration | Single or dual supply |
| 출력 유형 | Open-drain CMOS, MOS, and TTL compatible |
| Input Bias Current | 1 pA typical at 5 V |
| Input Impedance | 10^12 ohms typical |
| Response Time | 200 ns typical |
| Maximum Quiescent Current | 250 microamperes |
| 동작 온도 범위 | 0 C to +70 C |
| 패키지 | 14-SOIC, 0.154 inch body width, 3.90 mm nominal width |
| 실장 유형 | Surface mount |
| Manufacturing Technology | Silicon linear MOS process |
TS374CD 14-soic, 0.154 inch body width, 3.90 mm nominal width 핀 구성 가이드
TS374CD(14-soic, 0.154 inch body width, 3.90 mm nominal width 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: TS374CD.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
TS374CD 적합 용도: 6 애플리케이션s: Industrial Sensor Threshold Detection, Overvoltage and Undervoltage Monitoring, Zero-Cross and Signal-Crossing Detection, Portable and Battery-Powered Monitoring, Battery Pack Safety Detection, Open-Drain Control and Alarm Interface.
Industrial Sensor Threshold Detection
The TS374CD is appropriate for detecting when a sensor-derived voltage crosses a reference or control threshold. Its four independent channels allow four signals to be monitored without using four separate packages, while the typical 10^12-ohm input impedance and 1 pA input bias current at 5 V reduce loading on high-impedance sensing nodes. The 200 ns typical response time supports prompt transition detection. Each open-drain output can drive a pulled-up alarm, status, or interlock signal. Before implementation, verify that the sensor voltage stays within the input common-mode range and that the pull-up voltage is compatible with the downstream CMOS, MOS, or TTL input.
추천
Overvoltage and Undervoltage Monitoring
The TS374CD can monitor a supply or signal node against a reference and indicate whether the voltage is above or below a selected threshold. Two independent channels are enough for basic overvoltage and undervoltage detection, while the remaining channels can support additional rails or conditions. Its low maximum quiescent current of 250 microamperes is beneficial in continuously supervised systems, and the open-drain outputs permit wired-alarm implementation with external pull-up resistors. Reference accuracy depends on the threshold network and the comparator’s offset characteristics, so precision-critical installations should use the manufacturer’s timing and offset limits during design verification.
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Zero-Cross and Signal-Crossing Detection
The TS374CD is suited to detecting the crossing point of a changing analog signal when one input is biased near a reference and the other receives the signal. The 200 ns typical response time allows the output to change promptly after the differential polarity reverses. Because each output is open drain, a pull-up resistor can establish the logic-high level required by a counter, timer, or controller without requiring a dedicated active-high driver. High input impedance helps preserve weak source signals, while low typical input bias current supports high-impedance signal networks. Validate input common-mode limits and output timing under the expected input slew rate and overdrive conditions.
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Portable and Battery-Powered Monitoring
The TS374CD fits portable equipment that must monitor several analog conditions while keeping standby consumption low. The device combines four independent comparator channels with a maximum quiescent current of 250 microamperes, allowing one package to replace multiple single-channel comparators in space-constrained systems. Open-drain outputs can be pulled up to a suitable low-voltage rail, making the part compatible with compact CMOS control logic. Designers should still include a pull-up on every used output and account for the resistor’s continuous current draw when the output remains low. Confirm the allowed supply and common-mode ranges for the exact TS374 ordering code before finalizing a low-voltage design.
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Battery Pack Safety Detection
The TS374CD can compare battery-cell, pack, or charger-sense voltages against thresholds and provide fault indications when operating conditions leave the expected range. Four independent channels make it practical to monitor several battery parameters without multiplying the number of comparator packages. The low-power operating characteristic is helpful in battery systems, and open-drain outputs can be combined with pull-ups for a wired fault summary or charger-enable signal. The circuit still requires correctly scaled sensing networks, protection from transient voltages, and verification that every monitored voltage remains inside the comparator’s common-mode limits. Do not treat the comparator alone as a complete battery-protection solution.
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Open-Drain Control and Alarm Interface
The TS374CD’s open-drain outputs are useful when an alarm or control line must interface with CMOS, MOS, or TTL logic or with another open-drain device. An external pull-up resistor provides the high state, allowing the system designer to select a voltage appropriate to the receiving circuit and to interface several wired-open outputs when appropriate. The four-channel architecture supports independent fault, ready, limit, and direction signals in compact equipment. Timing must be checked with the actual pull-up value and wiring capacitance because the rising edge depends on the resistor and load rather than an internal active pull-up. Confirm sink-current requirements and logic-level thresholds before implementation.
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추천 제품 요약
엔지니어링 참조 데이터: TS374CD — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TLC374CD |
|---|---|---|
| Brand | STMicroelectronics | Texas Instruments |
| Package | 14-SOIC | 14-SOIC |
| Comparator Channels | 4 independent channels | 4 channels |
| Comparator Type | Low-power differential CMOS voltage comparator | Differential CMOS comparator |
| Output Type | Open-drain CMOS, MOS, and TTL compatible | Open-drain CMOS, MOS, and TTL compatible |
주요 차별점
- Four independent comparator channels in one package (vs TLC374CD)
- Low-power open-drain interface (vs TLC374CD)
- Single- or dual-supply flexibility (vs TLC374CD)
설계 노트
Do not treat an open-drain output as a push-pull logic output. Each connected output requires an external pull-up resistor to the supply used by the receiving logic. Select the resistor using the required rise time, bus capacitance, input leakage, and allowable sink current. Leaving the pull-up disconnected can leave the node floating, while an excessively small resistor can overload the comparator during the low output state.
Keep the comparator inputs, threshold-setting resistors, and reference source compact and away from high-current switching paths to reduce coupled noise and input glitches. Place the pull-up resistor close to the receiving logic or comparator output when rise time is important. Ground-return paths should be short, and the supply bypass network should follow the manufacturer’s recommended application layout. Sensitive threshold nodes should avoid long parallel traces that can act as antenna-like capacitance.
Estimated: with all four channels operating and a 5 V supply, the maximum quiescent current of 250 microamperes corresponds to a maximum quiescent power of 1.25 mW using P = 5 V × 250 microamperes. This is a design estimate based on the specified current and does not include output pull-up dissipation. Add pull-up current to the total budget whenever an output remains continuously low.
규정 준수 정보
No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified for the exact TS374CD ordering code. AEC-Q100 qualification is not indicated for this 0 C to +70 C commercial-temperature ordering code.
