MC1451621

Features:

• Operating Voltage Range: 2.5 to 5.5 V
• Operating Temperature Range: 40 to + 75°C
• Operating Power Consumption: 3.0 mA @ 2.5 V
• Maximum Operating Frequency:
MC145162 - 60 MHz @ 200 mV pp, VDD = 2.5 V
MC1451621 - 85 MHz @ 250 mV pp, VDD = 2.5 V
• Three or Four Pins Used for Serial MCU Interface
• BuiltIn MCU Clock Output with Frequency of Reference Oscillator
3/
4
• Power Saving Mode Controlled by MCU
• Lock Detect Signal
• OnChip 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


Pinout




Specifications

Symbol	Rating	Value	Unit
VDD	DC Supply Voltage	0.5 to + 6.0	V
Vin	Input Voltage, All Inputs	0.5 to VDD + 0.5	V
Iin , Iout	DC Current Drain Per Pin	10	mA
IDD , ISS	DC Current Drain VDDor VSS Pins	30	mA
Tstg	Storage Temperature Range	65 to + 150	°C

Description

The MC145162 is a dual phaselocked loop (PLL) frequency synthesizer especially designed for CT1 cordless phone applications worldwide. This frequency synthesizer of MC1451621 is also for any product with a frequency operation at 60 MHz or below.

The MC1451621 is a high frequency derivative of the MC145162, for products with operating frequencies of 85 MHz or below. The MC1451621 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 CT1 cordless phone application.

The MC1451621 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 MC1451621 allows the user to select an additional reference frequency for receive and transmit loops if required.