SP5024 Datasheet | Zarlink Semiconductor

Obsolescence Notice This product is obsolete. This information is available for your convenience only. .. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink./obsolete_products/ 3-Wire Bus Controlled Synthesiser DS2452 - 2.1 December 1992 The SP5024 is a programming variant of the SP5510 allowing the design of one tuner with either I 2C bus or 3-wire bus format depending on which device is inserted. The SP5024, when used with a TV varicap tuner, forms a plete phase locked loop tuning system. The circuit consists of a divide-by-8 prescaler with its own preamplifier and a 15 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 selected input'. In mode 1 the parison frequency is 7.8125k Hz and the programmable divider MSB is bypassed; mode 2 parison frequency is 6.25k Hz. The parison frequencies are both obtained from a 4MHz crystal controlled on-chip oscillator. The parator has a charge pump output with an output amplifier stage around which feedback may be applied. Only one external transistor is required for varicap line driving. CHARGE PUMP CRYSTAL MODE SELECT DATA CLOCK PORT P4 PORT P3 PORT P2 PORT P1 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 DRIVE OUTPUT VEE RF INPUT RF INPUT VCC NC NC LOCK ENABLE Features s plete 1.3GHz Single Chip System s Dual Standard 50k Hz or 62.5k Hz Step Size s Low Power Consumption (5V 40m A) s Programming patible with Toshiba TD6380 and TD6381 - s Pin patible with SP5510 - s Low Radiation s Varactor Drive Amplifier Disable s Charge Pump Disable s Single Port 18/19 Bit Serial Data Entry s Four Controllable Outputs s ESD Protection † DP18 CHARGE PUMP CRYSTAL MODE SELECT DATA CLOCK PORT P4 PORT P3 PORT P2 DRIVE OUTPUT VEE RF INPUT RF INPUT VCC LOCK...