Product Overview
LM6144BIM Quad Rail-to-Rail Operational Amplifier in a 14-Lead SOIC
Condition
New, unused stock. The photographed piece is a black plastic 14-lead surface-mount SOIC body, laser marked with the National Semiconductor script N logo, the top line reading M83XX and the lines below reading LM6144 and BIM. The gull-wing leads are straight and bright with no solder on them, and the molded pin 1 dimple sits at the left end of the marked face. It was set loose on bubble wrap for the photographs. Sold each out of deep stock, so you receive a like piece from the same holding rather than the exact chip in these photos, and top-line date-code characters can differ from unit to unit.
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Product Overview
The LM6144BIM is a National Semiconductor quad rail-to-rail input and output operational amplifier supplied in a 14-lead narrow 150 mil small-outline surface-mount package, National package code M14A, the B grade in the M package suffix. Four amplifiers share the one body on the standard 14-pin quad op-amp pinout, and rail-to-rail input and output is the whole point of the part: it lets a low-supply design use the full span between the rails instead of losing headroom at each end, which is why parts in this family landed in battery-powered instrumentation, portable sensing gear, and low-voltage signal conditioning. Published datasheet figures for the LM6144 put supply operation at 1.8V to 24V single supply, or plus or minus 0.9V to plus or minus 12V split, with a 17 MHz gain bandwidth product, a 25 V/us slew rate, and typical supply current around 650 uA per amplifier. Those are catalog numbers, not measurements taken here, and the part is sold as unused stock rather than tested stock - verify every figure against the manufacturer datasheet before you commit a board layout. This is original National Semiconductor silicon from before the Texas Instruments acquisition, commonly cataloged since as LM6144BIM/NOPB, so the script N logo on the body is the mark you match when you are sourcing an original for a legacy board.
Key Features
- Part number: LM6144BIM, marked LM6144 / BIM on the body
- Manufacturer: National Semiconductor, script N logo visible on the package
- Package: 14-lead plastic SOIC, narrow 150 mil, gull-wing leads, surface mount, National package code M14A
- Topology: quad rail-to-rail input and output operational amplifier, four amplifiers per package
- Pinout: standard 14-pin quad op-amp arrangement (published datasheet)
- Supply range: 1.8V to 24V single supply, or plus or minus 0.9V to plus or minus 12V split (published datasheet)
- Gain bandwidth product: 17 MHz (published datasheet)
- Slew rate: 25 V/us (published datasheet)
- Supply current: roughly 650 uA per amplifier typical (published datasheet)
- Top-line marking on the photographed piece: M83XX
- Condition: new and unused, sold each from deep stock, not tested here - verify against the manufacturer datasheet before use
Applications
- Instrument builder designing battery-operated test gear that has to use every millivolt between the supply rails
- Analog designer who needs four matched rail-to-rail channels in one footprint instead of four single op amps
- Marine electronics technician repairing a depth sounder or fish finder signal board
- Service tech restoring a barcode scanner analog front end that expects an original National quad part
- Prototype builder laying out a multi-channel rail-to-rail instrumentation stage on a surface-mount board
Frequently Asked Questions
What exactly is printed on the chip?
Three lines. The National Semiconductor script N logo followed by M83XX on the top line, then LM6144, then BIM. The pin 1 dimple is molded into the package at the left end of that marked face.
How many amplifier channels are in this package?
Four. The LM6144 is a quad op amp, which is why the body carries 14 leads, and it follows the standard 14-pin quad op-amp pinout given in the manufacturer datasheet. If you are dropping it onto an existing footprint, check that pinout against your board before you reflow.
Is this through-hole or surface mount?
Surface mount. It is a narrow 150 mil small-outline package with gull-wing leads meant to be reflowed or hand-soldered onto pads, not inserted into a board. If your board has a 14-pin DIP footprint, this is not a drop-in for it.
Will the piece I receive look exactly like the photos?
The package, logo, and LM6144BIM marking will match. The top-line date-code characters can vary across the holding, since stock is deep and was not all marked in the same run. If you need a specific date code, ask before ordering and we will look.
Why buy the two or three pieces I actually need instead of a bag of 50?
Because a repair needs one chip and a prototype run needs a handful, not a reel. Stock here is deep enough that you can order the exact count your board calls for and stop there, with no minimum lot and no leftover pieces sitting in a drawer for the next decade. Shipping is $8 flat rate and free once your order passes $28, so a small order of parts still lands cheaper than a forced-quantity lot, and orders leave our Idaho warehouse the same or next business day.
Four rail-to-rail amplifiers under one script N, from the years when getting the full swing out of a small supply was still a trick worth paying for. Check the pinout, give it the fourteen pads it was drawn for, and let it run your front end.
