SP5054SKGMPAS Datasheet

IC型號：
SP5054SKGMPAS
PDF描述：
2.6GHz 3-Wire BUS Controlled Synthesiser
文件大?。?/label>
278.25KB
PDF頁數(shù)：
9頁
芯片廠家：
MITEL

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SP5054

2.6GHz 3-Wire BUS Controlled Synthesiser

DS3048 - 3.4 May 1996

The SP5054 is a single-chip frequency synthesiser designed

for satellite TV tuning systems. It is a programming variant of

the SP5055, allowing the design of one tuner with either I

C bus

or 3-wire bus format, depending on which device is inserted.

The SP5054, when used with a satellite varactor tuner, forms

a complete phase locked loop tuning system.

The circuit consists of a divide-by-16 prescaler with its own

preamplifier and a 14/15-bit programmable divider controlled

by a serially-loaded data register. Four independently

programmable open-collector outputs are included. The device

has four modes of operation, selected by the Mode Select

input; these modes are summarised in Table1.

The comparison frequencies are obtained by the division of

the output of a 4MHz crystal controlled on-chip oscillator. The

phase comparator has a charge pump output with an output

amplifier stage around which feedback may be applied. Only

one external transistor is required for varactor line driving.

FEATURES

Complete 2路6GHz Single Chip System

62路5kHz, 100kHz and 125kHz Step Size

Low Power Consumption (325mW Typ.)

Programming Compatible with Toshiba TD6380,

TD6381 and TD6382

Pin Compatible with SP5055

Low Radiation

Varactor Drive Amplifier Disable

Charge Pump Disable

Single Port 18/19 Bit Serial Data Entry

Four Controllable Outputs

ESD Protection 鈥?/div>

See notes on pin compatibility

鈥?Normal ESD handling precautions should be observed

Fig. 1 Pin connections 鈥?top view

APPLICATIONS

Satellite TV

High IF Cable Tuning Systems

ORDERING INFORMATION

SP5054 KG DPAS

(18-lead plastic package)

SP5054S KG MPAS

(16-lead miniature plastic package)

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