1

SP8714

Fig. 2 Block diagram

The SP8714 is a switchable divide by 32/33, 64/65

programmable divider which is guaranteed to operate up to

2100MHz. It will operate from a supply of 2.7V to 5.25V and

requires typically 6.8mA (including the output current). It also

features a power down facility for battery economy.

The RF inputs are internally biased and should be capacitively

coupled to the signal source. The output is designed to interface

with CMOS synthesisers.

FEATURES

s Operation to 2100MHz

s Very Low Power

s Single Supply Operation 2.7V to 5.25V

s Power Down Facility for Battery Economy

s Latched Modulus Control Input

s Push Pull Output Drive

APPLICATIONS

s Cellular Telephones

s Cordless Telephones

Fig. 1 Pin connections - top view

ORDERING INFORMATION

SP8714 IG MPAS

Industrial Temperature Range

Miniature Plastic DIL Package

SP8714 IG MPAC

As above supplied on Tape and Reel

BIAS

V

CC

2

7

5

250K

NOMINAL

4

CK

D

Q

6

3

V

CC

V

EE

1

8

V

EE

POWER

DOWN

OUTPUT

MC

RS

RF

INPUT

(CLOCK)

DIVIDE BY

4 / 5

DIVIDE BY

8 / 16

CONTROL

LOGIC

D TYPE

MP8

1

8

2

7

3

6

4

5

RF INPUT

POWER DOWN

MODULUS CONTROL

VEE

SP8714

RF INPUT

V

RATIO SELECT

OUTPUT

CC

DS3562 - 5.0 July 1996

SP8714

2100MHz Very Low Current Multi-Modulus Divider