SP505AN

The SP505AN is one member of the SP505 series.The SP505 is a monolithic device that supports eight (8) popular serial interface standards for DTE to DCE connectivity. The SP505 is fabricated using a low power BiCMOS process technology, and incorporates a Sipex patented (5,306,954) charge pump allowing +5V only operation.Seven (7) drivers and seven (7) receivers can be configured via software for any of the above interface modes at any time.

Features of the SP505AN are:(1)+5V only operation; (2)seven (7) drivers and seven (7) receivers; (3)driver and receiver tri-state control; (4)internal transceiver termination resistors for V.11 and V.35 protocols; (5)loopback self-test mode; (6)software selectable protocol selection; (7)improved ESD tolerance for analog I/Os.Additional features with the SP505 include internal loopback that can be initiated in either single-ended or differential modes. While in loopback mode, driver outputs are internally connected to receiver inputs creating an internal signal path convenient for diagnostic testing.This eliminates the need for an external loopback plug.The SP505 also includes a latch enable pin with the driver and receiver address decoder.

The absolute maximum ratings of the SP505AN can be summarized as:(1)Vcc:7 V;(2)input voltages:-0.3V to (V +0.5V);(3)storage temperature:-65 to 150;(4)output voltages:-0.3V to (V +0.5V);(5)power dissipation:2000mW.These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.Due to the relatively large package size of the 80-pin quad flat-pack, storage in a low humidity environment is preferred.  Large high density plastic packages are moisture sensitive and should be stored in Dry Vapor Barrier Bags.The SP505 contains internal loopback capabilities for self-diagnostic tests.  Loopback is enabled through the decoder.  To initiate single-ended mode loopback, the decoder word is 1010.To initiate differential mode loopback, the decoder word is 1011.  The minimum transmission rates into the SP505 under loopback conditions are 120kbps for single-ended mode and 5Mbps for differential mode.The driver outputs are tristated and the receiver inputs are disabled during loopback.