MC145745 Datasheet (Motorola) - V.21/V.23 Telemeter Modem

MC145745, V.21/V.23 Telemeter Modem

Pin Location 1, 14 2 3 Symbol GND Vref CDA Type * * * Description Ground * These are the ground pins of the digital and the analog circuits.

The 0 V potential of the device is determined by the input voltage at these pins.

Reference Analog Ground * This pin p

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145745/D MC145745 Product Preview V.21/V.23 Telemeter Modem The MC145745 is a selectable modem chip compatible with ITU V.21 (300 baud full duplex asynchronous) and V.23 mode 2 (1200 baud half duplex asynchronous).

The built in differential line driver has the capability of driving 0 dBm into a 600 Ω load with a 5 V single power supply.

This device also includes a DTMF generator, DTMF receiver, call progress tone

MC145745 Features

* A low consumption device, the MC145745 integrates various functions in a small package. This modem IC is best suited for telemeter and other applications of this type.

* Conforms to ITU V.21 and V.23 Recommendat