Help identify a dual modulus PLL IC

Hi all,

It's marked D3827G002 in a 16 pin SOIC and is used in an AMPS RX chain

Pins identified so far:

PIN 1 Ref / 64 PIN 2 Ref / 64 PIN 3 Clock Data or Strobe PIN 4 Clock Data or Strobe PIN 5 Clock Data or Strobe PIN 6 5V PIN 7 REF IN (15.36MHz) PIN 8 PIN 9 PIN 10 PIN 11 PIN 12 PIN 13 GND PIN 14 From Prescaler (?) PIN 15 Modulus Select out (?) PIN 16

Date code is around 1990.

Any pointers to a data sheet or a programming guide will be most welcome.

Thanks,

Mark.