SP8713IGMPAS 데이터 시트보기 (PDF) - Mitel Networks

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SP8713IGMPAS

1100MHz Very Low Current Three Modulus Divider

Mitel Networks 

SP8713

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 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-up resistor. If the battery economy facility is not used, pin 7 should

be connected to VEE.

Modulus

Control 1

(Pin 3)

L

H

H

L

Modulus

Control 2

(Pin 6)

Division

Ratio

L

65

L

64

H

72

H

72

Table 1 Truth table

1000

800

TYPICAL

600

OVERLOAD

400

TYPICAL

SENSITIVITY

200

GUARANTEED*

OPERATING WINDOW

0

200 400 600 800 1000 1200

FREQUENCY (MHZ)

* Tested as specified in table of Electrical Characteristics

Fig. 3 Typical input characteristics

RF INPUT

CLOCK

MODULUS

CONTROL

INPUTS

OUTPUT

DON'T CARE

DON'T CARE

ts

th

32 or 36

Fig. 4 Modulus control timing diagram

32, 33 or 36

3

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