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TI's new SN75LBC776 is well-suited for high-speed computer-to-digital telephone/PBX connections, digital sound and imaging, fax-data modems and serial printer ports.
GeoPort is a serial communications standard that will replace the RS-232, AppleTalk, SCSI, keyboard, mouse and printer ports. It will provide "plug-n-play," point-to-point connections between GeoPort-compatible devices.
A typical GeoPort system consists of a controller that implements the protocol, an 85C30 USART to serialize/deserialize the data and the transceiver, TI's SN75LBC776. Because the transceiver is the link to the outside world, it is most vulnerable to hazards such as electronic static discharge (ESD).
The 'LBC776 reduces these risks with high ESD protection, current limiting and tri-stated outputs on shutdown and power-up. It operates from single 5-V supply using a small (0.1µF) charge pump capacitor. The maximum quiescent current is 15 mA, this is reduced to less than 100 uA during shutdown.
The SN75LBC776 is available now from TI and authorized distributors.
For designers of AppleTalk/LocalTalk systems, TI has a new single 5-V supply peripheral transceiver with two drivers and two receivers.
The SN75LBC775 will operate up to 1Mbps in either a point-to-point or networked environment and provides 4kV of ESD protection. With TI's patented LinBiCmos process, the 'LBC775 only requires a maximum of 10mA of supply current with no load. The transceiver is backwardly compatible with previous serial standards including RS-232.
The SN75LBC775 is available now from TI and authorized distributors.
SN75LBC775 20-pin wide-body SOIC $2.10
Suggested resale pricing in U.S. dollars in 1K quantities.
February 1996, vol. 13, no. 1