COM2661

The COM2661 is an MOS/LSI device fabricated using SMC's patented COPLAMOS technology.It is an enhanced pin and register compatible version of the COM 2651 that meets the majority of asynchronous and synchronous data communication requirements, by interfacing parallel digital systems to asynchronous and synchronous data communication  channels while requiring a minimum of processor overhead.The COM2661 contains a baud rate generator which can be either accept an external clock or to generate internal transmit or receive clocks.Sixteen different baud ratas ran be selected under program control when operating in the internalclock mode.

Features of the COM2661 are:(1)synchronous and asynchronous full duplex or half duplex operations; (2)re-programmable ROM on-chip baud rate generator; (3)selectable 5 to 8-bit characters; (4)selectable 1 or 2 SYNC characters; (5)internal or external character synchronization; (6)transparent or non-transparent mode; (7)transparent mode DLE stuffing (Tx) and detection (Rx); (8)automatic SYNC or DLE-SYNC:insertion; (9)SYNC, DLE and DLE-SYNC stripping.The COM2661 is a Universal Synchronous/Asynchronous Receiver/Transmitter (USART)designed for microcomputer system data com-munications. The USART is used as a peripheral and is programmed by the processor to communicate in commonly used asynchronous and synchronous serial data transmission techniques including IBM Bi-Sync.

The absolute maximum ratings of the COM2661 can be summarized as:(1)positive voltage on any pin,with respect to ground:+18.0V;(2)storage temperature range:-55 to 150;(3)operating temperature range:0 to 70;(4)lead temperature:325;(5)negative voltage on any pin,with respect to ground:-0.3V.The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product characteristics. Before ordering, purchasers are advised to contact the Sensitron Semiconductor sales department for the latest version of the datasheet(s).In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment,medical equipment, and safety equipment), safety should be ensured by using semiconductor devices that feature assured safety or by means of users' fail-safe precautions or other arrangement.In no event shall Sensitron Semiconductor be liable for any damages that may result from an accident or any other cause during operation of the user's units according to the datasheet(s). Sensitron Semiconductor assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information, products or circuits described in the datasheets.