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MC145750 - QPSK Encoder

General Description

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.

Key Features

  • K (Pin 45).

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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 PDC (42 kbps). It will perform up to 800 kbps data rate. It also contains PN511 random pattern generator and timing generator with PLL. • • • • • • • • • • Root–Nyquist Digital Filtering (Coefficient = 0.5) Burst Edge Processing Circuitry (Ramp–Up and –Down) Two 10–Bit DACs for I/Q Output Operating Voltage Range: 2.7 to 5.