I am having trouble identifying one of the two ICs on my dog's ultrasonic collar tag. The lettering on the 16-pin SOIC package was obscured by some sealant which I had to scrape away, leaving the markings quite faint, so it's possible I'm misreading them (and thus far I have found it impossible to get them to show up at all in a picture).

I can make out a TI logo, and there are three lines of markings which appear to read:

```
CM060B
49K _G4_  <-- That's an underlined G4
A995

```

The usual Google technique leads to lots of "In Stock!" and "Register to receive a quote" pages, but no datasheets.

Anyone know what this might be?

EDIT: The second IC on the tag is a quad two-input NAND gate. There is also some sort of crystal or oscillator in a tall, thin metal can (about the dimensions of a resistor but with both leads at the bottom); this appears to be the source of a very steady 40kHz sine wave. See [What is this component on my dog's door opening collar?](https://electronics.stackexchange.com/questions/72856/what-is-this-component-on-my-dogs-door-opening-collar) for a wide shot of the PCB with the glue still covering the IC in question.