Frequency Synthesizer. MC145165 Datasheet
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage 60 MHz Universal
Programmable Dual PLL
The MC145165 is a low–voltage dual phase–locked loop (PLL) frequency
synthesizer especially designed for CT–1 cordless phone applications world-
wide. This frequency synthesizer is also for any product with a frequency
operation at 60 MHz or below.
This chip is suitable for any portable RF products which use two 1.2 V
chargeable Ni–Cd batteries. The feature of low operating voltage can reduce
the current consumption and the cost of the portable RF products by reducing
the number of batteries used.
The device features fully programmable receive, transmit, reference, and
auxiliary reference counters accessed through an MCU serial interface. This
feature allows this device to operate in any CT–1 cordless phone application.
The device consists of two independent phase detectors for transmit and
receive loops. A common reference oscillator, driving two independent
reference frequency counters, provides independent reference frequencies for
transmit and receive loops. The auxiliary reference counter allows the user to
select an additional reference frequency for receive and transmit loops if
required. All of the functions and features of the MC145165 are fully compatible
with the MC145162.
• Operating Voltage Range: 1.8 to 3.6 V
• Operating Temperature Range: – 40 to + 75°C
• Operating Power Consumption: 1.5 mA @ 1.8 V
• Maximum Operating Frequency: 60 MHz
• Minimum Input Sensitivity: 60 MHz @ 200 mV p–p, VDD = 1.8 V
• Three or Four Pins Used for Serial MCU Interface
• Built–In MCU Clock Output with Frequency of Reference Oscillator 3/ 4
• Power Saving Mode Controlled by MCU
• Lock Detect Signal
• On–Chip Reference Oscillator Supports External Crystals to 16.0 MHz
• Reference Frequency Counter Division Range: 16 to 4095
• Auxiliary Reference Frequency Counter Division Range: 16 to 16,383
• Transmit Counter Division Range: 16 to 65,535
• Receive Counter Division Range: 16 to 65,535
Order this document
NOT RECOMMENDED FOR NEW DESIGNS;
PRODUCT TO BE PHASED OUT.
The MC145162 is a drop–in replacement for supply voltages ≥ 2.5 V.
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