TI revamps – Texas Instruments has revised the NE5532 op-amp—keeping the same part number—yet the update changes the manufacturing process and key specifications enough to make it incompatible with the original Signetics NE5532. The shift includes higher unity gain bandwid
The NE5532 has long been the kind of component engineers treat like infrastructure: a low-noise dual op-amp first introduced in 1979 by Signetics. later copied and refined across decades. It’s become a “jellybean” standard—multi-sourced. familiar. and usually interchangeable—so when Texas Instruments changes it in ways that break that promise. the reaction among builders isn’t subtle.
EEVblog’s [Dave] dug into Texas Instruments’ revised documentation and found that TI “completely overhaul[s]” the IC while keeping the same part number. The timing and the intent feel especially contradictory because. for a multi-sourced component like the NE5532. many designers rely on stable behavior rather than chasing subtle differences across suppliers.
The changes first show up in revision K of the TI datasheet. [Dave] describes an “entirely different manufacturing process” and a major specification shift—presented without changing the NE5532 part number, and even incompatible with the original Signetics NE5532.
On paper, some numbers improve. TI’s revision K datasheet shows a higher unity gain bandwidth by 2 MHz. But the same update also brings a much slower slew rate, tipping the overall performance trade-off away from what many users associate with the classic NE5532.
The power and protection rails also move in a direction that raises immediate practical concerns. The supply voltage is reduced from 22V to 18V, and ESD protection is halved from 2kV to 1kV. Even if TI’s new process node makes the device “slightly more efficient. ” the combination of lower operating voltage and weaker ESD resilience is the kind of trade-off that can matter in real circuits—especially older designs that were built around the original limits.
What makes the situation harder to digest is that TI’s multi-sourced position normally comes with a safety net: product change notifications. [Dave] notes that the NE5532 is multi-sourced and that choosing manufacturers like TI can mean receiving a PCN when anything changes. In the PCN tied to this op-amp. the change to the process node is noted—along with other changes—but no reasoning is provided.
Beyond the NE5532, the ripple effect reaches other “jellybean” parts. [Dave] says that. when he reviews the datasheets of similar NE5532 op-amps from other manufacturers. they still reflect the older 1980s specifications. One exception is the NE5532DR from Shenzhen HuaXuanYang Electronics. which also uses an 18V supply rail “for some reason. ” and reportedly includes a similar internal transistor configuration that reduces the ESD resistance.
But TI’s overhaul didn’t stop with the NE5532. [Dave] also says TI took an “ax” to the OPA134 op-amp by removing its offset trim feature and listing the pins as ‘NC’. with a warning not to connect those pins and with other specifications reportedly worsened. The result is similar: parts that look like the familiar jellybean equivalents stop behaving like true drop-in replacements.
The changes reportedly continue with the LMH6518. [Dave] argues that TI’s updates “might even kill oscilloscopes as they are commonly found in those,” suggesting the implications aren’t just about making a circuit not work—it’s about breaking equipment people expect to function.
Not every part follows the same approach, though. The LM317M also got an overhaul. but TI is said to have given it a new part name: LM317MQ. At first glance, [Dave] reports no major degradations in specifications and instead some actual improvements. That makes it even more puzzling that TI didn’t apply the same part-number change strategy to the other ICs—especially when the behavior shifts are severe enough to be called incompatible.
If you’re maintaining or repairing older devices, the lesson is blunt. Until TI clarifies what it intends for these revisions. [Dave] recommends sourcing these jellybean parts from a manufacturer other than TI—particularly when the goal is to replace ICs in older equipment and preserve the original performance and protection characteristics.
Texas Instruments NE5532 op-amp datasheet revision K ESD protection slew rate unity gain bandwidth OPA134 LMH6518 LM317M PCN compatibility electronics manufacturing
So they changed it but kept the same number… sounds like warranty bait to me.
I don’t even know what NE5532 is but lowering the voltage from 22 to 18 and then halving ESD protection?? That seems like a downgrade for no reason. People are gonna blow them up.
Wait is this the op-amp used in guitar pedals or like headphone amps? If your circuit was built with the old one then “incompatible” is kinda scary. Also they say unity gain bandwidth is higher but then slew rate is slower so like… which is it? Sounds like marketing confusion.
Companies do this all the time, just quietly swap the stuff. Next they’ll say it’s basically the same and then your whole project won’t work. I saw something about revision K and assumed it was a firmware update or something for the board, not the chip. Also why would they reduce ESD from 2kV to 1kV?? That feels insane unless they expect everyone to use kid gloves.