Device

Operating

Temperature Range

Package

MC12018

SEMICONDUCTOR

TECHNICAL DATA

MECL PLL COMPONENTS

÷128/129 DUAL MODULUS

PRESCALER

ORDERING INFORMATION

MC12018D

MC12018P

TA = – 40° to +85°C

SO–8

Plastic

P SUFFIX

PLASTIC PACKAGE

CASE 626

PIN CONNECTIONS

Order this document by MC12018/D

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

8

1

1

8

VCC

(Top View)

8

IN

NE

PE

Gnd

Vreg

SGnd

SIN

7

6

5

1

2

3

4

520 MHz Dual Modulus Prescaler

The MC12018 is a dual modulus prescaler which divides by 128 and 129.

An internal regulator is provided to allow this device to be used over a wide

range of power supply voltages. The devices may be operated by applying a

supply voltage of 5.0 Vdc

±10% at Pin 7, or by applying an unregulated

voltage source from 5.5 Vdc to 9.5 Vdc to Pin 8.

8

SIMPLIFIED BLOCK DIAGRAM

0.1

µF

VCC

Voltage

Regulator

÷N / N+1

7

0.1

µF

Vreg

4

Gnd

6

0.001

µF

Signal

Gnd

5

0.001

µF

Signal

Input

2

3 POS

Edge

NEG

Edge

Control

Input

1

1. Vreg at Pin 7 is not guaranteed to be between 4.5 and

5.5 V when VCC is being applied to Pin 8

2. Pin 7 is not to be used as a source of regulated output

voltage

3. 10 k

Ω pulldown recommended with negative edge

output (Pin 2)

10 k

© Motorola, Inc. 1997

Rev 2