MC44827 Datasheet - Motorola

MC44827 - LOW-POWER PLL TUNING CIRCUIT

Pin 1 2 3 4 5 6 7 8 9 10,11,12,13 14 15 16 Symbol DA CL XTAL Amp In VTUN VCC2 VCC1 HF In Gnd B0 to B3 VCC3 Lock EN 3 *wire bus data input 3 *wire bus clock input Crystal oscillator (3.2 MHz or 4 MHz) Negative operational amplifier input and phase comparator output Operational amplifier

MC44827 Features

* as MC44817/17B but has improved sensitivity performance and reduced power dissipation. The low frequency preamplifier has been removed and the operational amplifier pull

* up resistor has been increased to 60 kΩ. The MC44827/27B are controlled via a 3

* wire bus. The MC44827/27B have the

MC44827_Motorola.pdf