MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 3

1/97

1.1GHz Dual Modulus

Prescaler

The MC12026 is a high frequency, low voltage dual modulus prescaler

used in phase–locked loop (PLL) applications.

The MC12026A can be used with CMOS synthesizers requiring

positive edges to trigger internal counters such as Motorola’s MC145xxx

series in a PLL to provide tuning signals up to 1.1GHz in programmable

frequency steps.

The MC12026B can be used with CMOS synthesizers requiring

negative edges to trigger internal counters.

A Divide Ratio Control (SW) permits selection of an 8/9 or 16/17 divide

ratio as desired.

The Modulus Control (MC) selects the proper divide number after SW

has been biased to select the desired divide ratio.

NOTE: The “B” Version Is Not Recommended for New Designs

and TTL

Pinout: 8–Lead Plastic (Top View)

8

1

IN

IN

7

2

NC

VCC

6

3

MC

SW

5

4

GND

OUT

MAXIMUM RATINGS

Symbol

Characteristic

Range

Unit

VCC

Power Supply Voltage, Pin 2

–0.5 to +7.0

Vdc

TA

Operating Temperature Range

–40 to +85

°C

Tstg

Storage Temperature Range

–65 to +150

°C

MC

Modulus Control Input, Pin 6

–0.5 to +6.5

Vdc

IO

Maximum Output Current, Pin 4

10.0

mA

MC12026A

MC12026B

MECL PLL COMPONENTS

÷8/9, ÷16/17

DUAL MODULUS PRESCALER

FUNCTION TABLE

SW

MC

Divide Ratio

H

H

L

L

H

L

H

L

8

9

16

17

Note: SW: H = VCC, L = OPEN

MC: H = 2.0V to VCC; L = GND to 0.8V

P SUFFIX

8–LEAD PLASTIC PACKAGE

CASE 626–05

D SUFFIX

8–LEAD PLASTIC SOIC PACKAGE

CASE 751–05