器件名称:
ST491ACDR
功能描述:
LOW POWER HIGH SPEED RS-485/RS-422 TRANSCEIVER
文件大小:
269.86KB 共12页
简 介:
ST491A LOW POWER HIGH SPEED RS-485/RS-422 TRANSCEIVER s s s s s s s s LOW SUPPLY CURRENT: 5mA MAX DESIGNED FOR RS485 INTERFACE APPLICATIONS -7 TO 12 COMMON MODE INPUT VOLTAGE RANGE 70mV TYPICAL INPUT HYSTERESIS DESIGNED FOR 25Mbps OPERATION OPERATE FROM SINGLE 5 SUPPLY ±4kV ESD PROTECTION CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD PROTECTION DIP SOP DESCRIPTION The ST491A is a low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST491A draws 5mA (typ.) of supply current when unloaded and operates from a single 5V supply. ORDERING CODES Type ST491ACN ST491ABN ST491ACD ST491ABD ST491ACDR ST491ABDR Temperature Range 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C Package Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that place the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic high output if both inputs are open circuit. Comments 25parts per tube / 40tube per 25parts per tube / 40tube per 50parts per tube / 20tube per 50parts per tube / 20tube per 2500 parts per reel 2500 parts per reel box box box box DIP-14 DIP-14 SO-14 (Tube) SO-14 (Tube) SO-14 (Tape & Reel) SO-14 (Tape & Reel) July 2003 1/12 ST491A PIN CONFIGURATION PIN DESCRIPTION PlN N° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SYMBOL NC RO RE DE DI GND ……
