1

SP8713

Fig. 2 Block diagram

The SP8713 is a switchable divide by 64/65/72

programmable divider which is guaranteed to operate up to

1100MHz. It will operate from a supply of 2.7V to 5.25V and

requires typically 4.1mA (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, such as the NJ88C50.

FEATURES

s Operation to 1100MHz

s Very Low Power

s Single Supply Operation 2.7V to 5.25V

s Power Down Facility for Battery Economy

s Latched Modulus Control Inputs

s Push Pull Output Drive

APPLICATIONS

s Cellular Telephones

s Cordless Telephones

s Mobile Radio

Fig. 1 Pin connections - top view

ORDERING INFORMATION

SP8713 IG MPAS Industrial Temperature Range

Miniature Plastic DIL Package

SP8713 IG MPAC As above supplied on Tape and Reel

BIAS

V

CC

2

7

5

4

D

Q

6

3

V

CC

V

EE

1

8

V

EE

POWER

DOWN

OUTPUT

MC1

MC2

RF

INPUT

(CLOCK)

DIVIDE BY

4 / 5

DIVIDE BY

16

CONTROL

LOGIC

D TYPE

D

Q

D TYPE

CK

D TYPE

250K

NOMINAL

MP8

1

8

2

7

3

6

4

5

RF INPUT

POWER DOWN

MODULUS CONTROL 2

VEE

SP8713

RF INPUT

V

MODULUS CONTROL 1

OUTPUT

CC

SP8713

1100MHz Very Low Current Three Modulus Divider

DS3934 - 4.0 November 1997