Shortage Alert – ST LM324AWPT Quad Op-Amp in Short Supply. Start Your LM324 Series Alternative Validation Early.

Recently, STMicroelectronics’ official eStore showed the LM324AWPT as out of stock. The manufacturer’s standard lead time is now 14 weeks. At the same time, a recent Findchips report noted a clear rise in public market activity for the LM324 series. The LM324QT, in particular, saw design and procurement activity grow by 1,681.33% year over year. Several other LM32 series variants also posted triple-digit, or even four-digit growth.

The LM324AWPT is a low-power, general-purpose quad operational amplifier from ST. It comes in a TSSOP-14 package. Engineers often use it in industrial controls, small appliances, power monitoring, sensor signal conditioning, low-speed analog front ends, and general-purpose control boards. The unit price is not high. But when this part runs out, it can hold up production for the entire PCB.

1. Why Would a Basic Op-Amp Like the LM324 Also Face Shortages?

On the supply side, the LM324 is a mature analog device. It usually depends on stable, mature process nodes and assembly/test capacity. However, today, foundries are reallocating mature capacity across multiple product families. Analog chips, power management ICs, and power devices are all feeling the impact. Some capacity is being prioritized for stronger-demand applications, such as AI servers, power modules, industrial equipment, and automotive electronics. Low-cost, general-purpose analog parts often get lower production priority.

On the demand side, the LM324 series has a very wide range of uses. It is not a dedicated chip for one industry. Instead, it is used in countless sensors, power monitors, comparator amplifiers, signal buffers, and low-speed analog sampling circuits. When multiple industries restock at the same time, the combined demand grows quickly. The concentrated increase in procurement activity shown in the Findchips report suggests that the market is now restocking, seeking alternatives, or rebuilding safety stock.

2. What Does This Mean for Procurement and Engineering?

For procurement professionals, the LM324AWPT shortage is not just “one less part number.” Many established BOMs already have the LM324 series qualified and validated through long-term use. Switching to another part on short notice involves engineering tests, customer approvals, and quality traceability.

For engineers, the replacement decision is not as simple as “any LM324 quad op-amp will do.” The LM324AWPT has several key specifications. It supports a 3V to 30V single supply range. It also supports a ±1.5V to ±15V dual supply range. Its gain-bandwidth product is 1.3MHz. Its input common-mode range includes ground. Each amplifier draws about 375µA of supply current. The input bias current is 20nA. When evaluating alternatives, engineers need to check package dimensions, pin assignments, input commonmode range, output swing, offset voltage, temperature grade, stability, and PCB footprint. For industrial or long-lifecycle projects, they should also check batch consistency, original packaging, date codes, COC, and traceability documents.

3. Procurement Response Strategies

Step one – Screen your BOM for LM324 series part numbers right away.

Start by checking LM324AWPT, LM324WPT, LM324D, LM324DT, LM324QT, and other related variants. Confirm your usage over the next three months. Check your current stock, open orders, and customer certification requirements. If your project is scheduled for production in Q3 or Q4, we recommend locking in at least 8 to 12 weeks of safety stock now.

Step two – Start alternative validation early.

The LM324A-SR from 3PEAK can be considered as a candidate alternative. But before making any change, the engineering team should complete sample testing. This includes quiescent current, input offset, output swing, temperature drift, noise, load driving capability, and actual circuit stability. For parts already in mass production, do not switch without full validation.

Step three – Pay attention to quality traceability when purchasing.  

During a shortage, spot market batches come from many different sources. Before placing an order, check labels, packaging, lot numbers, date codes, and test capabilities. For critical projects, start with a small pilot purchase for functional and incoming inspection, then arrange bulk stocking after verification.

Step four – Set up a dynamic early-warning mechanism.

We recommend monitoring LM324 series stock, lead times, and quoted prices every week. If the primary part shows no stock for two consecutive weeks, or if the quoted price rises noticeably, trigger the alternative review and stocking process immediately.

Step five – Broaden your sourcing channels.

When authorized channels have limited stock or uncertain lead times, procurement teams can also evaluate independent distributors as a supplement for routine purchasing and emergency stocking. WIN SOURCE helps companies quickly confirm global spot availability, date-code ranges, and delivery timelines. When the original part number is out of stock, we can help match candidate alternatives, reducing the backandforth between procurement and engineering. During a shortage, WIN SOURCE also supports customers with a complete cycle: stock confirmation, alternative matching, quality traceability, and delivery fulfillment.

The shortage of LM324AWPT gives procurement teams a practical reminder. The components that disrupt delivery are not always the most expensive chips in the BOM. They are often basic analog parts that have stayed stable for years and are easy to overlook.

Independent distributors can serve as a supplementary supply chain resource. They can help companies check market inventory, delivery timelines, and possible alternative options more quickly. In urgent sourcing cases, they can also support quality traceability review and stocking assessment.

For projects that still use the LM324 series, early action is essential. Procurement teams should confirm inventory, lead times, and alternative options as soon as possible. This approach can help reduce the risk of production delays or line stoppages.

© 2026 Win Source Electronics. All rights reserved. This content is protected by copyright and may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Win Source Electronics.