MSM6946

Features:

•Compatible with ITU-T V.21 (MSM6926)
•Compatible with BELL 103 (MSM6946)
•CMOS silicon gate process
•Switched capacitor and advanced CMOS analog technology
•Data rate from 0 to 300 bps
•Full duplex (2-Wire)
•Originate and Answer modes
•Selectable built-in timers and external delay timers possible
•All filtering, modulation, demodulation, and DTE interface on chip
•TTL compatible digital interface
•Low power dissipation: 90 mW Typ.


Pinout




Specifications

Storage Temperature .............................65°C to +150°C
Ambient Temperature with
Power Applied.........................................55°C to +125°C
Supply Voltage on V_DDRelative to GND..........0.3V to +4.6V
DC Voltage Applied to Outputs
in Tri-State..........................................0.5V to V_DDQ + 0.5V
DC Input Voltage................................. 0.5V to V_DD + 0.5V
Current into Outputs (LOW)........................................20 mA
Static Discharge Voltage...........................................>2001V
(per MIL-STD-883, Method 3015)
Latch-up Current.....................................................>200 mA   


Description

The MSM6926 and the MSM6946 are OKI's 300 bps single chip modem series which transmit and receive serial, binary data over a switched telephone network using frequency shift keying (FSK). The MSM6926 is compatible with ITU-T V.21 series data sets, while the MSM6946 is compatible with Bell 103 series data sets.

These MSM6946 provide all the necessary modulation, demodulation, and filtering required toimplement aserial,asynchronous communication link. OKI's single chip modem series is designed for users who are not telecommunication experts and are easy to use cost effective alternative to standard discrete modem design.

CMOS LSI technology of MSM6946 provides the advantages of small size, low power, and increased reliability. The design of the integrated circuit assures compatibility with a broad base of installed low speed modems and acoustic couplers.  Applications of MSM6946  include interactive terminals, desk top computers, point of sale equipment, and credit verification systems.