LM529CN - High-Speed Differential Comparator | Texas Instruments
MPN: LM529CN ✓ نشطLM529CN نظرة عامة
A high-speed differential comparator is an analog integrated circuit that compares two input voltages and produces a logic-level indication of their relative relationship. In the broader signal-chain hierarchy, the LM529CN belongs to the comparator class within interface and signal-conditioning ICs. Its differential inputs are useful when a system must make a fast decision based on the difference between two changing voltages rather than a single voltage referenced to ground.
The principal application feature is the LM529CN's controlled delay behavior across a broad input-overdrive range. The stated 3 ns variation for 5 mV to 500 mV overdrive indicates that output timing is relatively consistent even when the input signal exceeds the comparator's switching threshold by a substantial amount. This makes the part relevant to pulse-width detection, threshold crossing, waveform conversion, timing control, and digital-interface conditioning where predictable response time is valuable.
The LM529CN uses a differential comparator architecture and is specified for TTL output compatibility. In a practical circuit, the two input nodes should be connected to the signals being compared, while the output can drive a downstream TTL input through appropriate routing and termination. Power-supply decoupling should be placed close to the device, and unused inputs should be held at a defined potential rather than left floating. Because the device is a legacy-style 14-pin PDIP, its through-hole package can also simplify prototype construction and rework.
Typical uses include pulse-width measurement, zero-cross or level detection, industrial control logic, communications signal conditioning, and timing circuits. The 5 V supply requirement makes the LM529CN especially suitable for systems that already use TTL logic rails. Care should be taken to maintain valid input common-mode and output-drive conditions, observe the specified supply voltage, and account for the device's operating-temperature range during system qualification.
This product page combines the Texas Instruments comparator identity, package information, operating limits, cross-reference candidates, practical design notes, and application guidance to support faster component selection and PCB planning.
بدائل مباشرة لـ LM529CN — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
LM361N/NOPB
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
NE529A
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM529CN الحدود القصوى والخصائص الكهربائية
| Product Type | High-speed differential comparator |
| Manufacturer | Texas Instruments |
| جهد التغذية | 5 V |
| Comparator Type | Differential |
| Output Logic Compatibility | TTL |
| Propagation Delay Variation | 3 ns for 5 mV to 500 mV overdrive |
| Input Overdrive Range | 5 mV to 500 mV |
| نطاق درجة حرارة التشغيل | 0 °C to 70 °C |
| العلبة | 14-pin PDIP |
| Package Body Width | 0.300 inch (7.62 mm) |
| نوع التركيب | Through-hole |
| عدد الدبابيس | 14 |
| Lead Finish | Tin lead |
دليل تكوين أطراف LM529CN 0.300 inch (7.62 mm)
تكوين الأطراف لـ LM529CN (حزمة 0.300 inch (7.62 mm)). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ LM529CN.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
LM529CN مناسب لـ 6 التطبيقs: Pulse-Width Detection, Industrial Control Logic, Communications Signal Conditioning, Zero-Cross Detection, Waveform-to-Logic Conversion, Timing and Trigger Circuits.
Pulse-Width Detection
The LM529CN is well suited to detecting the crossing of a pulse through a reference level because it is a 5 V differential comparator with a 3 ns propagation-delay variation over 5 mV to 500 mV overdrive. Place the pulse on one input and the threshold on the other, with the TTL-compatible output feeding a timer or logic gate. Add controlled hysteresis when the source is noisy so that small fluctuations around the reference do not create repeated output transitions.
موصى به
Industrial Control Logic
In industrial control logic, the LM529CN can compare a control or sensor signal against a fixed reference and convert the relationship into a TTL-compatible decision. Its differential input arrangement helps reject common-mode offsets when both signals share similar voltage levels, while the 5 V supply aligns with conventional control logic. The specified 0 °C to 70 °C range must be respected, and input levels should remain within the comparator's supported common-mode region.
موصى به
Communications Signal Conditioning
The LM529CN can act as a high-speed threshold decision element in communications equipment where a received waveform must be converted into a digital level. The 3 ns delay variation across 5 mV to 500 mV overdrive provides useful timing consistency when the input amplitude changes. Place the receiver signal and threshold on the differential inputs, route the TTL output into the following logic, and keep sensitive input traces short and separated from switching nodes.
موصى به
Zero-Cross Detection
For zero-cross or level-cross detection, the LM529CN compares an oscillating input with a reference voltage and provides a fast logic transition when the two inputs exchange order. The high-speed differential architecture is useful when the timing of the crossing must be repeatable across different input overdrive levels. For noisy waveforms, use a filtered reference and deliberate hysteresis rather than placing the threshold directly at a high-slope signal crossing.
موصى به
Waveform-to-Logic Conversion
The LM529CN is appropriate for converting analog events into TTL-compatible logic in legacy instrumentation and timing systems. Its differential inputs allow an event signal to be compared with an adjustable threshold, while the specified 3 ns overdrive-related delay variation supports consistent digital timing. Keep the comparator close to the receiver stage, bypass its 5 V supply locally, and account for fan-out and output rise-time requirements of the downstream TTL load.
موصى به
Timing and Trigger Circuits
The LM529CN can generate a trigger when two timing signals cross, making it useful for pulse-width, phase, and event-timing circuits. Its differential inputs permit comparison of two derived timing signals without forcing either source into a ground-referenced arrangement. The 5 V TTL-compatible output can feed a counter or flip-flop, while the controlled delay variation helps maintain repeatable timing when the overdrive changes. Validate the complete absolute-delay curve for the selected supply and load conditions.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM529CN — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM361N/NOPB | NE529A |
|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Comparator Type | Differential | Differential | Differential |
| Mounting Type | Through-hole | Through-hole | Through-hole |
أبرز الفروقات
- Specified delay consistency across a broad overdrive range (مقابلLM361N/NOPB)
- Direct 5 V TTL-oriented interface (مقابلNE529A)
- Same 14-pin PDIP mechanical format for legacy through-hole designs (مقابلLM361N/NOPB)
ملاحظات التصميم
Keep the two comparator inputs and their reference source close together and away from high-current switching paths. Because the LM529CN uses a differential input, route the paired signals as a compact, geometry-matched pair where practical. Place the local 5 V bypass capacitor at the supply and ground pins with short ground returns. Use the datasheet pin-description table to finalize connections because the complete verified pin map was not available for this listing.
Add intentional hysteresis around the threshold when the compared signal contains noise or slow transitions. Small feedback from the output to the appropriate input can create a controlled switching margin, but the feedback amount must not exceed the output swing and input limits. For high-frequency or long-trace applications, terminate the output appropriately and keep the threshold reference low-impedance with a local bypass capacitor.
Do not treat the 3 ns propagation-delay variation as the absolute propagation delay. The variation applies across 5 mV to 500 mV overdrive, while the total delay also depends on the selected device conditions, output loading, and supply level. Likewise, package equivalence alone does not prove that a substitute is electrically identical. Compare supply tolerances, input common-mode range, output levels, timing, and temperature limits before approving LM361N/NOPB or NE529A.
معلومات الامتثال
The retrieved product information identifies a tin-lead finish. RoHS, REACH, halogen-free, and conflict-minerals status were not established by the retrieved information.
