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SP505 Datasheet WAN Multi-Mode Serial Transceiver

Manufacturer: Exar (now MaxLinear)

General Description

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.

Overview

SP505 WAN Multi-Mode Serial Transceiver • +5V Only Operation 80 CTS 79 SCT 78 DSR 77 SCT(b) 76 SCT(a) 75 GND 74 VCC 73 VCC 72 GND 71 RD(b) 70 RD(a) 69 DM(b) 68 DM(a) 67 CS(b) 66 CS(a) 65 TT(b) 64 GND 63 TT(a) 62 VCC 61 SD(a) • Seven (7) Drivers and Seven (7) Receivers • Driver and Receiver Tri-state Control • Internal Transceiver Termination Resistors for V.11 and V.35 Protocols • Loopback Self-Test Mode • Software Selectable Protocol Selection • Interface Modes Supported: • RS-232 (V.28) • X.21/RS-422 (V.11) • EIA-530 (V.10 & V.11) • EIA-530A (V.10 & V.11) • RS-449 (V.10 & V.11) • V.35 (V.35 & V.28) • V.36 (V.10 & V.11) • RS-485 (un-terminated V.

Key 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. Tri-state ability for the driver and receiver outputs is controlled by supplying a 4-bit word i.