MC145170 PLL Integrated Circuits
The new MC1451701 is pinforpin compatible with the MC145170. The MC1451701 is recommended for new designs.
The MC1451701 is a singlechip synthesizer capable of direct usage in the MF, HF, and VHF bands. A special architecture makes this PLL the easiest to program in the industry. Either a bit or byteoriented format may be used. Due to the patented BitGrabberE registers, no address/steering bits are required for random access of the three registers. Thus, tuning can be accomplished via a 2byte serial transfer to the 16bit N register.
The device features fully programmable R and N counters, an amplifier at the f in pin, onchip support of an external crystal, a programmable reference output, and both single and doubleended phase detectors with linear transfer functions (no dead zones). A configuration (C) register allows the part to be configured to meet various applications. A patented feature allows the C register to shut off unused outputs, thereby minimizing noise and interference. In order to reduce lock times and prevent erroneous data from being loaded into the counters, a patented jamload feature is included. Whenever a new divide ratio is loaded into the N register, both the N and R counters are jamloaded with their respective values and begin counting down together. The phase detectors are also initialized during the jam load.
&127; Operating Voltage Range: 2.5 to 5.5 V
&127; Maximum Operating Frequency:
185 MHz @ V in = 500 mV pp, 4.5 V Minimum Supply
100 MHz @ V in = 500 mV pp, 3.0 V Minimum Supply
&127; Operating Supply Current: 0.6 mA @ 3 V, 30 MHz
&127; Operating Supply Current: 1.5 mA @ 3 V, 100 MHz
&127; Operating Supply Current: 3.0 mA @ 5 V, 50 MHz
&127; Operating Supply Current: 5.8 mA @ 5 V, 185 MHz
&127; Operating Temperature Range: 40 to 85°C
&127; R Counter Division Range: 1 and 5 to 32,767
&127; N Counter Division Range: 40 to 65,535
&127; Direct Interface to Motorola SPI and National MICROWIREE Serial Data Ports
&127; Chip Complexity: 4800 FETs or 1200 Equivalent Gates
Explanation of pin function terms
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