Identify component SEM TI39 CF51

The "Whatsit?" game makes a fun a puzzle, but what we've got isn't much to go on. Package, at a minimum, plus markings is sometimes enough to narrow it down.

Package, function (e.g. "switcher"), markings, and at least a few pin functions is often enough to nail it.

Cheers, James Arthur

rter. It's not that. It's a Samsung chip but I don't know what. It is surro unded by inductors.

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There's a picture in the link. In Step 16 they show the Oculus Rift circuit board. In the upper left hand corner inside a black outline is the IC. It is a 16 pin square package. I don't think it is a standard package. Maybe i t is a PLCC variant. It is surrounded by 3 inductors, 10 capacitors and a f errite. The text on the right says its a Texas Instruments SEM TI 39 CF5I S ingle Schmitt-Trigger Inverter. I thought it was funny they identified a si ngle inverter as a major component in the Oculus Rift so I took a closer lo ok. There is no TI marking, SEM is a Samsung marking. I don't need to know. I was just curious.

verter. It's not that. It's a Samsung chip but I don't know what. It is sur rounded by inductors.

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it board. In the upper left hand corner inside a black outline is the IC. I t is a 16 pin square package. I don't think it is a standard package. Maybe it is a PLCC variant. It is surrounded by 3 inductors, 10 capacitors and a ferrite. The text on the right says its a Texas Instruments SEM TI 39 CF5I Single Schmitt-Trigger Inverter. I thought it was funny they identified a single inverter as a major component in the Oculus Rift so I took a closer look. There is no TI marking, SEM is a Samsung marking. I don't need to kno w. I was just curious.

Ah, I missed the hi-res pic.

Three inductors and big filter caps--looks like a triple switcher of some sort. PLCC-16?

Cheers, James Arthur

inverter. It's not that. It's a Samsung chip but I don't know what. It is s urrounded by inductors.

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cuit board. In the upper left hand corner inside a black outline is the IC. It is a 16 pin square package. I don't think it is a standard package. May be it is a PLCC variant. It is surrounded by 3 inductors, 10 capacitors and a ferrite. The text on the right says its a Texas Instruments SEM TI 39 CF

5I Single Schmitt-Trigger Inverter. I thought it was funny they identified a single inverter as a major component in the Oculus Rift so I took a close r look. There is no TI marking, SEM is a Samsung marking. I don't need to k now. I was just curious.

Some kind of switcher. My guess is that it is a flavor of lamp controller l ike this replacement one for the Galaxy Note II N7100. This chip is marked TI29. The new one is TI39.

The data sheet they link to

and the package type and number of pins are totally wrong for what is in the picture. Looks like somebody goofed on that one.

Looks kind of like a switcher or some kind of high frequency (ish) part ?

boB

major component in the Oculus Rift so I took a closer look. There is no TI marking, SEM is a Samsung marking. I don't need to know. I was just curious.

Looks like a basic Schmitt trigger inverter to me?

If you have a Schmitt input, hysteresis, a simple feed back with controlled input capacitance (loading) will create a pulse generator and if you want, you can control the duty cycle.

Jamie

Check out the picture in the teardown. The part is definitely not an sn74lvc1g14 like is shown in the datasheet.

boB