SY10EL1189 Datasheet | Micrel Semiconductor

FIBRE CHANNEL COAXIAL CABLE DRIVER AND LOOP RESILIENCY CIRCUIT Features s s s s s 425ps propagation delay 1.6V output swings Single +5V operation Internal 75KΩ input pull-down resistors Available in 16-pin SOIC package SY10EL1189 FINAL DESCRIPTION The SY10EL1189 is a differential receiver, differential transmitter specifically designed to drive coaxial cables. It incorporates the output cable driver capability of the SY10EL89 Coaxial Cable Driver with additional circuitry to multiplex the output cable drive source between the cable receiver or the local transmitter inputs. The multiplexer control circuitry is TTL patible for ease of operation. The SY10EL1189 is useful as a bypass element for Fibre Channel-Arbitrated Loop (FC-AL) or Serial Storage Architecture (SSA) applications, to create loop style interconnects with fault tolerant, active switches at each device node. This device is particularly useful for back From Input Cable panel applications where small size is desirable. (ECL Levels) The EL89 style drive circuitry produces swings twice as large as a standard PECL output. When driving a DR coaxial cable, proper termination is required at both ends DR of the line to minimize reflections. The 1.6V output swings allow for proper termination at both ends of the cable. Because of the larger output swings, the QT, QT outputs are terminated into the thevenin equivalent of 50Ω to QT VCC-3.0V instead of 50Ω to VCC-2.0V. .. LOGIC DIAGRAM Local Receive Data (ECL Levels) QR QR VBB 1 Local Transmit Data (ECL Levels) DT DT 0 To Output Cable (Enhanced Swing) SEL (TTL) PIN NAMES Pin DR/DR Function Differential Input from Receive Cable Buffered Differential Output from Receive Cable Differential Input to Transmit Cable Buffered Differential Output to Transmit Cable Multiplexer Control Signal (TTL) Postive Power Supply Ground Reference Voltage Output PIN CONFIGURATION QR/QR DT/DT QT/QT QR QR V CC NC V CC QT QT V CC 1 2 3 4 5 6 7 8 16 15 14...