Advance Information

PLL Frequency Synthesizer with Serial Interface

CMOS

Thenew MC145170–1 is pin–for–pin compatible with the MC145170. A comparisonof the two parts is shown in the table below. The MC145170–1 is recommended for new designs. The MC145170–1 is a single–chip synthesizer capable of direct usage in the MF, HF, and VHF bands. A special architecture makes this PLL the easiest to programin the industry. Either a bit–or byte–oriented format may be used. Due to the patented BitGrabber?registers, no address/steering bits are required for random accessof the three registers. Thus, tuning can be accomplished via a 2–byte serial transfer to the 16–bit N register.

Operating Voltage Range: 2.7 to 5.5 V

Maximum Operating Frequency:

185 MHz @ Vin= 500 mVpp, 4.5 V Minimum Supply

100 MHz @ Vin= 500 mVpp, 3.0 V Minimum Supply

Operating Supply Current:

0.6 mA @ 3.0 V, 30 MHz

1.5 mA @ 3.0 V, 100 MHz

3.0 mA @ 5.0 V, 50 MHz

5.8 mA @ 5.0 V, 185 MHz

Operating Temperature Range: -40 to 85°C

R Counter Division Range: 1 and 5 to 32,767

N Counter Division Range: 40 to 65,535

Direct Interface to Motorola SPI and National MICROWIRE Serial DataPorts

Chip Complexity: 4800 FETs or 1200 Equivalent Gates

See Application Notes AN1207/D and AN1671/D