MITEL SP8713 Datasheet

CC

Q

CC

O

O

C

C

Q

C

RF INPUT

V

MODULUS CONTROL 1

OUTPUT

1100MHz Very Low Current Three Modulus Divider

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

■ Operation to 1100MHz

■ Very Low Power

■ Single Supply Operation 2.7V to 5.25V

■ Power Down Facility for Battery Economy

■ Latched Modulus Control Inputs

■ Push Pull Output Drive

■ ESD Protection on All Pins

†

SP8713

DS3934 - 4.0 November 1997

1 8

CC

2 7

SP8713

3 6
4 5

Fig. 1 Pin connections - top view

RF INPUT

POWER DOWN

MODULUS CONTROL 2

V

EE

SP8713

MP8

APPLICATIONS

■ Cellular Telephones

■ Cordless Telephones

■ Mobile Radio

†

ESD precautions must be observed

6

1

M

3

2

M

RF
INPUT
(CLOCK)

1

8

V

D

D

D TYPE

D TYPE

K

D TYPE

ORDERING INFORMATION

SP8713 IG MPAS Industrial Temperature Range
SP8713 IG MPAC As above supplied on Tape and Reel

CONTROL

LOGIC

DIVIDE BY

4 / 5

DIVIDE BY

Miniature Plastic DIL Package

V

2

250K
NOMINAL

BIAS

16

7

P
DOWN

5

4

V

EE

UTPUT

WER

V

EE

Fig. 2 Block diagram

1

SP8713

ABSOLUTE MAXIMUM RATINGS

Supply voltage (VEE=0V) (note 1) -0.5V to 7V

Control and RF inputs,

RF output (V

RF input current (note 1) 10mA

Operating temperature -40°C to +85°C

Storage temperature range -55°C to +150°C

Maximum junction temperature +150°C

NOTE 1. Duration <2 minutes.

ELECTRICAL CHARACTERISTICS

Guaranteed over the following conditions (unless otherwise stated):

VCC=+2.7V to +5.25V (with respect to VEE), Output load (pin 4) = 10pF, T

=0V) (note 1)-0.5V to VCC+0.5V

EE

= -40°C to +85°C (note 2)

amb

Characteristic Units Conditions

Value

Min. Typ. Max.

Supply current (note 3) 4.1 4.7 mA Power down input low
Supply current (note 3) 8 50 µA Power down input high
Power down high VCC-0.5 V

CC

V
Power down low 0 VCC-2.0 V
Modulus control 1 high (note 4) 0.6V

CC

Modulus control 1 low (note 4) 0 0.4V
Modulus control 2 high (note 4) 0.6V

CC

Modulus control 2 select low (note 4) 0 0.4V

V

CC

CC

V

CC

CC

V Divide by 64 or 72

V Divide by 65 or 72

V Divide by 72

V Divide by 64 or 65
Max. sinewave input frequency 1100 MHz See Figure 5
Min. sinewave input frequency 200 MHz See Figure 5
Min. RF input voltage 50 mV RMS RF input 200MHz to

1100MHz. See Figure 5

Max. RF input voltage 200 mV RMS RF input 200MHz to

1100MHz. See Figure 5

Output level (pin 4) 500 600 mV p-p
Modulus set-up time, t
Modulus hold time, t
Power down time, t

h

pd

(notes 5,6,8) 20 ns RF input = 1GHz

s

(notes 6,8) 1 ns RF input = 1GHz
(notes 7,8) 10 µs See Figure 9

Power down recovery time, tpu(notes 7,8) 6 µs See Figure 9

NOTES

2. All electrical testing is performed at +85°C.

3. Typical values are measured at +25°C and V

= +5V.

CC

4. Modulus Control and Ratio Select are high impedance inputs which can be driven directly by standard CMOS outputs.

5. Modulus control is latched at the end of the previous cycle.

6. See Figure 4.

7. See Figure 8.

8. These parameters are not tested but are guranteed by design.

2

SP8713

O

S

O

OPERATING NOTES

The RF inputs are biased internally and are normally coupled to the signal source with suitable capacitors.
The output stage has a novel design and is intended to drive a CMOS synthesiser input. External pull-down resistors or

circuits are not required. The SP8713 is

The device will operate down to DC frequencies for non-sinusoidal signals provided that the input slew rate is better than

100V/µs.

POWER DOWN (pin 7) is connected internally to a pull-up resistor. If the battery economy facility is not used, pin 7 should

be connected to V

EE

.

not suitable for driving TTL or similar devices.

1000

Modulus Modulus Division

Control 1 Control 2 Ratio

(Pin 3) (Pin 6)

LL65
HL64
HH72

LH72

Table 1 Truth table

RF INPUT

CLOCK

DULU

M
CONTROL

INPUTS

800

600

400

RF INPUT VOLTAGE (mV RMS)

200

0

200 400 600 800 1000 1200

GUARANTEED*

OPERATING WINDOW

OVERLOAD

SENSITIVITY

FREQUENCY (MHZ)

* Tested as specified in table of Electrical Characteristics

Fig. 3 Typical input characteristics

DON'T CAREDON'T CARE

TYPICAL

TYPICAL

UTPUT

t

s

t

h

32 or 36 32, 33 or 36

Fig. 4 Modulus control timing diagram

3