MITEL SP8715IG, SP8715MPAS, SP8715 Datasheet
1
SP8715
SP8715
1100MHz Very Low Current Multi-Modulus Divider
Description
The SP8715 is a switchable divide by 64/65, 128/129
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 3.6mA (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
● Operation to 1100MHz
● Very Low Power
● Single Supply Operation 2.7V to 5.25V
● Power Down Facility for Battery Economy
● Latched Modulus Control Input
● Push Pull Output Drive
● ESD Protection on All Pins
†
DS3830 Issue 4.2 September 1999
Applications
● Cellular Telephones
● Cordless Telephones
● Mobile Radio
†
ESD precautions must be observed
Odering Information
SP8715/IG/MPAS Industrial Temperature Range
Miniature Plastic SOIC Package
SP8715/IG/MPAC As Above supplied on Tape
and Reel
BIAS
V
CC
2
7
5
250K
NOMINAL
4
CK
D
Q
6
3
VCCV
EE
1
8
V
EE
POWER
DOWN
OUTPUT
MC
RS
RF
INPUT
(CLOCK)
DIVIDE BY
4 / 5
DIVIDE BY
16 / 32
CONTROL
LOGIC
D TYPE
Figure 1 Block Diagram
2
SP8715
Figure 2 Pin Connections
MP8
Absolute Maximum Ratings
Supply voltage (VEE=0V) (note 1) -0.5V to 7V
Control and RF inputs,
RF output (VEE =0V) (note 1)-0.5V to VCC+0.5V
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
amb
= -40°C to +85°C (note 2)
Characteristic Units Conditions
Supply current (note 3) 3.6 4.2 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 high (note 4) 0.6V
CC
V
CC
V Divide by 64 or 128
Modulus control low (note 4) 0 0.4V
CC
V Divide by 65 or 129
Ratio select high (note 4, 9) 0.6V
CC
V
CC
V Divide by 64 or 65
Ratio select low (note 4, 9) 0 0.4V
CC
V Divide by 128 or 129
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
Value
Min. Typ. Max.
3
SP8715
Electrical Characteristics (Continued)
Guaranteed over the following conditions (unless otherwise stated):
VCC=+2.7V to +5.25V (with respect to VEE), Output load (pin 4) = 10pF, T
amb
= -40°C to +85°C (note 2)
Characteristic Units Conditions
Output level (pin 4) 500 600 mV p-p
Modulus set-up time, ts(notes 5,6,8) 20 ns RF input = 1GHz
Modulus hold time, t
h
(notes 6,8) 1 ns RF input = 1GHz
Power down time, t
pd
(notes 7,8) 10 µs See Figure 9
Power down recovery time, t
pu
6 µs See Figure 9
(notes 7,8)
NOTES
2. All electrical testing is performed at +85°C.
3. Typical values are measured at +25°C and VCC = +5V.
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 guaranteee by design.
9. The ratio select pin is not intended to be switched dynamically.
Value
Min. Typ. Max.
OPERATING NOTES
The RF inputs are biased internally and are normally
coupled to the signal source with suitable capaitors.
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 SP8715 is
not suitable for driving TTL or similar devices.
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-down resistor. If the battery economy facility is not
used, pin 7 should be either left unconnected or
connected to VEE.
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