MC145162-1

The MC145162-1 is a high frequency derivative of the MC145162, for products with operating frequencies of 85 MHz or below.The MC145162-1 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 MC145162-1 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.

The MC145162-1 has the following features include:(1)operating voltage range: 2.5 to 5.5 V;(2)operating temperature range:-40 to+75°C;(3)operating power consumption: 3.0 mA@2.5 V;(4)three or four pins used for serial MCU Interface;(5)built-in mcu clock output with frequency of reference oscillator ÷3/÷4; (6)power saving mode controlled by MCU;(7)lock detect signal;(8)on-chip reference oscillator supports external crystals to 16.0 MHz;(9)reference frequency counter division range: 16 to 4095;(10)auxiliary reference frequency counter division range: 16 to 16,383;(11)transmit counter division range: 16 to 65,535;(12)receive counter division range: 16 to 65,535.

The absolute maximum ratings of the MC145162-1 are:(1)DC supply voltage:-0.5 to +6.0V;(2)storage temperature range:-65 to +150°C;(3)input voltage,all inputs:-0.5 to Vdd +0.5V(4)DC current drain per pin:10mA;(5)DC current drain Vdd or Vss pins:30mA.The MCU programming scheme is defined in two formats controlled by the ENB input. If the enable signal is high during the serial data transfer, control register/reference frequency programming is selected. If the ENB is low, programming of the transmit and receive counters is selected. During programming of the transmit and receive counters, both ADin and Din pins can input the data to the transmit and receive counters. Both counters' data is clocked into the PLL internal shift register at the leading edge of the CLK signal.It is not necessary to reprogram the reference frequency counter/control register when using the enable signal to program the transmit/receive channels.