MC145750 Datasheet (Motorola)

MC145750, QPSK Encoder

POWER SUPPLY VSS Digital Ground (Pins 6, 44) These are the negative power supply input pins to the digital portion of the device and are connected to ground (0 V).

VDD Positive Power Supply Input (Pins 7, 43) These are the positive power supply input pins to the digital portion of the device.

Typic

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145750/D MC145750 Product Preview QPSK Encoder The MC145750 is a silicon gate HCMOS device designed to encode π/4 shift QPSK baseband signals.

The device contains two 10 bit DACs for the I/Q signal, Root Nyquist digital filtering, and burst rising and falling edge processing for digital RF communication equipment.

Primary applications for this device are in products that will be used in PHS (384 kbps) and

MC145750 Features

* K (Pin 45). MOTOROLA MC145750 5 ERST/PDN External Reset/Power Down Input (Pin 48) When a logic L is applied to this pin, it forces a complete power down. When at start up, VDD goes high, it is recommended that a logic L, then a logic H be applied to this pin to start up and reset all digital port