PDF CXA3555N Data sheet ( Hoja de datos )

Número de pieza	CXA3555N
Descripción	All Band Tuner IC with On-chip PLL
Fabricantes	Sony Corporation
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No Preview Available ! CXA3555N All Band Tuner IC with On-chip PLL Description The CXA3555N is a monolithic TV tuner IC which integrates local oscillator and mixer circuits for VHF band, local oscillator and mixer circuits for UHF band, an IF amplifier and a tuning PLL onto a single chip, enabling further miniaturization of the tuner. 30 pin SSOP (Plastic) Features • Low power consumption (5V, 63mA typ.) • Low noise figure, low distortion characteristics • High gain/low gain selectable • Supports IF double-tuned/adjacent channel trap • Balanced oscillator circuits (3 sets) with excellent oscillation stability • On-chip PLL supports I2C bus • On-chip high voltage drive transistor for charge pump • Frequency step selectable from 31.25, 50 or 62.5kHz (when using a 4MHz crystal) • Low-phase noise synthesizer • On-chip 4-output band switch (output voltage: 5V, current capacity: 5mA) • 30-pin SSOP small package Absolute Maximum Ratings • Supply voltage VCC • Operating temperature Topr • Storage temperature Tstg • Allowable power dissipation PD –0.3 to +5.5 –25 to +75 –55 to +150 V °C °C 580 mW Operating Conditions Supply voltage VCC 4.75 to 5.30 V Applications • TV tuners • VCR tuners • CATV tuners Structure Bipolar silicon monolithic IC Note: This IC has pins whose electrostatic discharge strength is weak as the operating frequency is high and the high-frequency process is used for this IC. Take care of handling the IC. Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. –1– E01326-PS 1 page Pin No. Symbol Pin voltage [V] 7 5 IFIN1 5 6 Equivalent circuit 1.6k 2.0 6 IFIN2 CXA3555N Description IF inputs. These pins must be connected to the mixer outputs via coupling capacitance. 7 VCC — 8 MIXOUT1 9 MIXOUT2 — 89 Power supply. Mixer outputs. These pins output the signal in open collector format, and they must be connected to the power supply via a load. 10 GND1 — 11 VHFIN 2.4 during VHF reception 0.0 during UHF reception 7 11 3k 12 BYP VCC (when open) 14 UHFIN1 15 UHFIN2 0.0 during VHF reception 2.3 during UHF reception 7 14 15 Analog circuit GND. 57k 15p 150k 3k 12 VHF input. The input format is unbalanced input. VHF input GND and gain switching. GND: low gain Open: high gain (However, when control byte GC is "0") 3k 3k UHF inputs. Input a balanced signal to Pins 14 and 15, or ground either of Pin 14 or 15 with a capacitor and input the signal to the other pin. –5– 5 Page Item Bus timing (I2C bus) SCL clock frequency Start waiting time Start hold time Low hold time High hold time Start setup time Data hold time Data setup time Rise time Fall time Stop setup time CXA3555N Symbol Measurement conditions Min. Typ. Max. Unit fSCL tW;STA tH;STA tLOW tHIGH tS;STA tH;DAT tS;DAT tR tF tS;STO 0 1300 600 1300 600 600 0 600 600 400 kHz ns ns ns ns ns 900 ns ns 300 ns 300 ns ns – 11 – 11 Page

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