SP5026 Datasheet | Zarlink Semiconductor

SP5026 1.0GHz 3-Wire Bus Controlled Synthesizer Data Sheet Features - - - - - - - - - - - plete 1.OGHz Single Chip System Dual Standard 62.5k Hz or 31.25 k Hz Step Size Low power Consumption (5V 40m A) Function patible with Toshiba TD6380 and TD6381- Pin patible with SP5510† Low Radiation Varactor Drive Amplifier Disable Charge Pump Disable Single Port 18/19 Bit Serial Data Entry Four Controllable Outputs ESD Protection‡ DS5776 Issue 2 December 2002 Ordering Information SP5026 DP 18-lead plastic package) SP5026S MP (16-lead miniature plastic package) Description The SP5026 is a programming variant of the SP5510, allowing the design of one tuner with either 12C bus or 3-wire bus format depending on which device is inserted. The SP5026, when used with a TV varicap tuner, forms a plete phase locked loop tuning system. The circuit consists of a divider-by-8 prescaler with its own preamplifier and at 5-bit programmable divider controlled by a serially-loaded data register. Four open-collector outputs, each independently programmable, are included. The device has two modes of operation, selected by the “mode select” input. In mode 1, the parison frequency is 7.8125k Hz and the programmable divider MSB is bypassed; mode 2 parison frequency is 3.90625k Hz. The parison frequencies are both obtained from a 4MHz crystal controlled on-chip oscillator. † See notes on pin patibility ‡ Normal ESD handling procedures should be observed Applications - - - Satellite TV when bined with SP4902 2.5GHz Prescaler Cable tuning systems VCRs Figure 1 - Block Diagram Data Sheet The parator has a charge pump output with an amplifier stage around which feedback may be applied. Only one external transistor is required for varicap line driving. Figure 2 - Pin Connections - Top View Functional Description The SP5026 contains all the elements necessary, with the exception of reference crystal, loop filter and external high voltage transistor to control...