MITEL SP8715IG, SP8715MPAS, SP8715 Datasheet

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

250K

NOMINAL

VCCV

POWER

DOWN

OUTPUT

INPUT (CLOCK)

DIVIDE BY

4 / 5

DIVIDE BY

16 / 32

CONTROL

LOGIC

D TYPE

Figure 1 Block Diagram

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

Power down low 0 VCC-2.0 V

Modulus control high (note 4) 0.6V

V Divide by 64 or 128

Modulus control low (note 4) 0 0.4V

V Divide by 65 or 129

Ratio select high (note 4, 9) 0.6V

V Divide by 64 or 65

Ratio select low (note 4, 9) 0 0.4V

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.

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

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

Power down time, t

(notes 7,8) 10 µs See Figure 9

Power down recovery time, t

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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