GENERAL DESCRIPTION
SP510E enables a Serial Communications Controller to implement a variety of serial port types including V.24, V.25, V.36, EIA-530, EIA-530-A, X.21, RS-232. Operating configuration is programmable in system using the mode-select pins. The V.11 and V.35 modes include internal bus termination that may be switched in or out using the TERM_OFF pin. The SP510E is ideal for space constrained applications. It requires only a single 5V supply for full operation. The VL pin determines the receiver output voltage (VOH, down to 1.65V), for interfacing with lower voltage CPUs and FPGAs. For single supply operation at 5V the VL pin will be connected to VCC. Fully compliant V.28 and V.10 driver output voltages are generated using the onboard charge pump. Special power sequencing is not required during system startup. Charge pump outputs are internally regulated to minimize power consumption. The SP510E requires only four 1µF capacitors for complete functionality. The device may be put into a low power shutdown mode when not in active use.
Exar Corporation
