B553AC PDF datasheet can download.
This product has Prescaler Divide by 16 or 17 functions.
This is one of the Prescaler Divide types. This part name is UPB553AC.
The package is DIP 8 Pin Type
Manufacturers of the product is NEC.
Image and pinout :
Some of the text files within the PDF file
B553AC is a VHF two-modulus prescaler intended for use in measurement instrumentation and PLL.
A prescaler is a device that divides the input frequency by a desired ratio. The divide ratio of the prescaler can be set according to the user’s desired value.
Using a prescaler IC with a division ratio of 16, the input frequency can be divided by 1/16, and using a prescaler IC with a division ratio of 17, the input frequency can be divided by 1/17.
[ … ]
Please refer to the file for details.