Features: •One-chip CCITT V.23, V.22 and V.21 ITU compatible modem data pump
•Full-duplex operation at 0-300 bit/s (FSK) or 600 and 1200 bit/s (DPSK) or 0-1200 bit/s (FSK) forward channel with or without 0-75 bit/s back channel
•Interfaces directly with standard microprocessors (8048, 80C51 typical)
•Serial or parallel microprocessor bus for control
• Serial port for data transfer
• Both synchronous and asynchronous modes of operation
•Call progress, carrier, precise answer tone (2100Hz), calling tone (1300 Hz) and FSK mark detectors
•DTMF and 550 or 1800 Hz guard tone generators
•Test modes available: ALB, DL, RDL, Mark,Space, Alternating bit patterns
•Precise automatic gain control allows 45 dB dynamic range
•CMOS technology for low power consumption using 60 mW @ 5V from a single power supply
•Surface mount PLCC package availablePinout
Specifications
| PARAMETER |
RATING |
UNIT |
| VDD Supply Voltage |
7 |
V |
| Storage Temperature |
-65 to 150 |
°C |
| Soldering Temperature (10 sec.) |
260 |
°C |
| Applied Voltage |
-0.3 to VDD+0.3 |
V |
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 73K322L is a highly integrated single-chip modem IC which provides the functions needed to construct a CCITT V.23, V.22 and V.21 compatible modem, capable of 1200 or 0-300 bit/s full-duplex operation or 0-1200 bit/s half-duplex operation with or without the back channel over dial-up lines. The 73K322L is an enhancement of the 73K221L single-chip modem with performance characteristics suitable for European and Asian telephone systems.
The 73K322L produces either 550 or 1800 Hz guard tone, recognizes and generates a 2100 Hz answer tone, and supports V.21 for 300 Hz FSK operation. It also operates in V.23, 1200 bit/s FSK mode. The 73K322L 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 PLCC or DIP package. The 73K322L operates from a single +5V supply with very low power consumption.
The 73K322L includes the DPSK and FSK modulator/demodulator functions, call progress and handshake tone monitor test modes, and a tone generator capable of producing DTMF, answer, calling and 550 or 1800 Hz guard tone. This device supports V.23, V.22 (except mode v) and V.21 modes of operation, allowing both synchronous and asynchronous communications. The 73K322L is designed to appear to the systems designer as a microprocessor peripheral, and will easily interfacewith popular one-chip microprocessors (80C51 typical) for control of modem functions through its 8-bit multiplexed address/data bus or via an optional serial control bus. An ALE control line simplifies address demultiplexing. Data communications occurs through a separate serial port only.
The 73K322L is ideal for use in either free standing or integral system modem products where multi-standard data communications over the 2-wire switched telephone network 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 control microprocessor, and RS-232 level converter for a typical system. The 73K322L is part of TDK Semiconductor Corporation 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.
73K322L Data Sheet
