73K302L

Features:

•One-chip Bell 212A, 103 and 202S/T standard compatible modem data pump
• Full-duplex operation at 0-300 bit/s (FSK), 1200 bit/s (DPSK) or 0-1200 bit/s (FSK) forward channel with or without 0-150 bit/s back channel
•Full-duplex 4-wire operation in Bell 202 mode
•Pin and software compatible with other TDK Semiconductor Corporation K-Series 1-chip modems
• Interfaces directly with standard microprocessors (8048, 80C51 typical)
•Serial port for data transfer
•Both synchronous and asynchronous modes of operation
•Call progress, carrier, precise answer tone (2225 Hz), soft carrier turn-off (SCT), and FSK mark detectors
• DTMF, answer, and SCT tone generators
•Test modes available:  ALB, DL, RDL, Mark, Space,Alternating bit patterns
•CMOS technology for low power consumption using 60 mW @ 5V from a single power supply


Pinout




Specifications

PARAMETER	RATING
VDD Supply Voltage	7V
Storage Temperature	-65 to 150°C
Soldering Temperature (10 sec.)	260°C
Applied Voltage	-0.3 to VDD+0.3V
Note: All inputs and outputs are protected from static charge using built-in, industry standard protection devices and all outputs are short-circuit protected.

Description

 The 73K302L is a highly integrated single-chip modem IC which provides the functions needed to construct a Bell 202, 212A and 103 compatible modem. The 73K302L is an enhancement of the 73K212L single-chip modem with Bell 202 mode features added. The 73K302L is capable of 1200 or 0-300 bit/s full-duplex operation over dial-up lines.4-wire full-duplex capability and a low speed back channel are also provided in Bell 202 mode. The 73K302L recognizes and generates a 900 Hz soft carrier turn-off tone, and allows 103 for 300 bit/s FSK operation. The 73K302L integrates analog, digital, and switched-capacitor array functions on a single substrate, offering excellent performance and a high level of functional integration in a single 28-pin DIP or PLCC package. The 73K302L operates from a single +5V supply with very low consumption.

  The 73K302L includes the DPSK and FSK modulator/demodulator functions, call progress and handshake tone monitors, test modes, and a tone generator capable of producing DTMF, answer, and 900 Hz soft carrier turn-off tone. This device supports Bell 202, 212A and 103 modes of operation, allowing both synchronous and asynchronous communications.  The 73K302L is designed to appear to the systems designer as a microprocessor peripheral, and will easily interface with popular one-chip microprocessors (80C51 typical) for control of modem functions through its 8-bit multiplexed address/data bus or via an optional serial command bus. An ALE control line simplifies address demultiplexing. Data communications occurs through a separate serial port only.

  The 73K302L is ideal for use in either free standing or integral system modem products where multi-standard data communications is desired.  Its high functionality, low power consumption and efficient packaging simplify design requirements and increase system reliability. A complete modem requires only the addition of the phone line interface,a modem controller, and RS232 level converter for a typical system.

  Tri-mode capability in one-chip allows full-duplex Bell 212 and 103 operation or assymetrical Bell 202S operation over the 2-wire switched telephone network.  202T mode full-duplex operation of the 73K302L at 1200 bit/s is also possible when operating on 4-wire leased lines.

  A soft carrier turn-off feature facilitates fast line turn around when using the 202S mode for half-duplex applications.

  The 73K302L is part of TDK Semiconduct K- Series family of pin and function compatible single-chip modem products. These devices allow systems to be configured for higher speeds and Bell or CCITT operation with only a single component change.