Product Summary

The MC145220F is a low–voltage, single–chip frequency synthesizer with serial interface capable of direct usage up to 1.1 GHz. The MC145220F simultaneously supports two loops. The two on–chip dual–modulus prescalers may be independently programmed to divide by either 32/33 or 64/65. The MC145220F consists of two dual–modulus prescalers, two 6–stage A counters, two 12–stage N counters, two fully programmable 13–stage R (reference) counters, and two lock detectors. Four phase/frequency detectors are included: two with current source/sink outputs and two with double–ended outputs.

Parametrics

MC145220F absolute maximum ratings: (1)V+, V+ DC Supply Voltage: –0.5 to + 6.0 V; (2)Vin DC Input Voltage: –0.5 to V+ + 0.5 V; (3)Vout DC Output Voltage: –0.5 to V+ + 0.5 V; (4)Iin DC Input Current, per Pin: ± 10 mA; (5)Iout DC Output Current, per Pin: ± 20 mA; (6)I DC Supply Current, V+, V+, GND, and GND Pins: 30 mA; (7)PD Power Dissipation, per Package: 300 mW; (8)Tstg Storage Temperature: – 65 to + 150℃; (9)TL Lead Temperature, 1 mm from Case for 10 Seconds: 260℃.

Features

MC145220F features: (1)Operating Frequency: 40 to 1100 MHz; (2)Operating Supply Voltage Range: 2.7 to 5.5 V; (3)Supply Current: Both PLLs Operating 12 mA Nominal: One PLL Operating, One on Standby -6.5 mA Nominal; Both PLLs on Standby-30 mA Maximum; (4)Phase Detector Output Current: Up to 2 mA @ 5 V; Up to 1 mA @ 3 V; (5)Operating Temperature Range: -40 to 85℃; (6)Independent R Counters Allow Use of Different Step Sizes for Each Loop; (7)Double-uffered R Register Reference and Loop Divide Ratios; (8)Updated Simultaneously; (9)R Counter Division Range: 1 and 10 to 8,191; (10)Dual-Modulus Capability Provides Total Division of the VCO Frequency up to 262,143; (11)Direct Interface to Motorola SPI Data Port.

Diagrams

MC145220F block diagram

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