MC12013P datasheet(13/15 Pages) MOTOROLA

13 / 15 page

Enable = 1

Enable = 0

–

MECL

MTTL

Trans–

lator

Figure 8. Divide By 10/11 (MC12013)

APPLICATIONS INFORMATION

The primary application of these devices is as a

high–speed variable modulus prescaler in the divide by N

section of a phase–locked loop synthesizer used as the

local oscillator of two–way radios.

Proper VHF termination techniques should be followed

when the clock is separated from the prescaler by any

appreciable distance.

In their basic form, these devices will divide by 5/6, 8/9,

or 10/11. Division by 5, 8, or 10 occurs when any one or all

of the five gate inputs E1 through E5 are high. Division by

6, 9, or 11 occurs when all inputs E1 through E5 are low.

(Unconnected MTTL inputs are normally high, uncon-

nected MECL inputs are normally low). With the addition

of extra parts, many different division configurations may

be obtained (20/21, 40/41, 50/51, 100/101, etc.) A few of

the many configurations are shown below, only for the

MC12013.

MC12009 MC12011 MC12013

MOTOROLA RF/IF DEVICE DATA

MC12013P Datasheet(PDF) 13 Page - Motorola, Inc