FIBRE CHANNEL COAXIAL CABLE DRIVER AND LOOP RESILIENCY CIRCUIT FEATURES ■ ■ ■ ■ ■ DESCRIPTION 425ps propagation delay 1.6V output swings Single +5V operation Internal 75KΩ input pull-down resistors Available in 16-pin SOIC package 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 compatible 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 panel applications where small size is desirable. The EL89 style drive circuitry produces swings twice as large as a standard PECL output. When driving a coaxial cable, proper termination is required at both ends 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 VCC-3.0V instead of 50Ω to VCC-2.0V. LOGIC DIAGRAM From Input Cable (ECL Levels) Local Receive Data (ECL Levels) QR DR QR DR VBB Local Transmit Data (ECL Levels) PRELIMINARY SY10EL1189 1 QT 0 QT DT DT To Output Cable (Enhanced Swing) SEL (TTL) PIN NAMES Pin PIN CONFIGURATION QR 1 16 V CC QR 2 15 DR V CC 3 14 DR NC 4 13 GND V CC 5 12 V BB QT 6 11 DT QT 7 10 DT V CC 8 9 SEL Top View SOIC Function DR/DR Differential Input from Receive Cable QR/QR Buffered Differential Output from Receive Cable DT/DT Differential Input to Transmit Cable QT/QT Buffered Differential Output to Transmit Cable SEL Multiplexer Control Signal (TTL) VCC Postive Power Supply GND Ground VBB Reference Voltage Output TRUTH TABLE SEL Function L DR ➝ QT H DT ➝ QT Rev.: C 1 Amendment: /2 Issue Date: January 2000 PRELIMINARY SY10EL1189 Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating Value Unit VCC Power Supply Voltage (Referenced to GND) 0 to +7.0 V VIN Input Voltage (Referenced to GND) 0 to VCC V IOUT Output Current 50 100 mA TA Operating Temperature Range –40 to +85 °C Tstore Storage Temperature Range –50 to +150 °C VCC Operating Voltage Range(2) 4.5 to 5.5 V — Continuous — Surge NOTES: 1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM RATlNG conditions for extended periods may affect device reliability. 2. Parametric values specified at 4.75 to 5.25V. DC ELECTRICAL CHARACTERISTICS(1) VCC = 5.0V, GND = 0V TA = –40°C Symbol VOL Parameter Output LOW Voltage(2,3) TA = 0°C TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit 3.05 3.23 3.35 3.05 3.24 3.37 3.05 3.24 3.37 3.05 3.25 3.41 V 3.92 4.05 4.11 3.98 4.09 4.16 4.02 4.11 4.19 4.09 4.16 4.28 V (QR, QR) VOH Output HIGH Voltage(2,3) (QR, QR) VOL Output LOW Voltage(2,4) (QT, QT) 1.94 2.22 2.50 1.83 2.12 2.41 1.80 2.10 2.39 1.77 2.06 2.35 V VOH Output HIGH Voltage(2,4) (QT, QT) 3.71 3.89 4.08 3.79 3.98 4.17 3.83 4.02 4.20 3.90 4.09 4.28 V ICC Quiescent Supply Current(5) 20 25 42 22 26 47 23 27 47 25 28 47 mA VIL Input LOW Voltage(2) (DR,DR & DT,DT) 3.05 — 3.50 3.05 — 3.52 3.05 — 3.52 3.05 — 3.56 V VIH Input HIGH Voltage(2) (DR,DR & DT,DT) 3.77 — 4.11 3.83 — 4.16 3.87 — 4.19 3.94 — 4.28 V IIL Input LOW Current (DR,DR & DT,DT) — — 150 — — 150 — — 150 — — 150 µA IIH Input HIGH Current (DR,DR & DT,DT) 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA VIL Input LOW Voltage SEL — — 0.8 — — 0.8 — — 0.8 — — 0.8 V VIH Input HIGH Voltage SEL 2.0 — — 2.0 — — 2.0 — — 2.0 — — V IIL Input LOW Current SEL VIN = 500mV — — 600 — — 600 — — 600 — — 600 µA Input HIGH Current SEL VIN = 2.7V VIN = VCC — — — — 20 100 — — — — 20 100 — — — — 20 100 — — — — 20 100 µA 3.57 3.63 3.70 3.62 3.67 3.73 3.65 3.70 3.75 3.69 3.75 3.81 V IIH VBB Output Reference Voltage(2) NOTES: 1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is mounted in a test socket or mounted on a printed circuit board and transverse air greater than 500lfm is maintained. 2. 3. 4. 5. 2 Values will track 1:1 with the VCC supply. Outputs loaded with 50Ω to +3.0V. Outputs loaded with 50Ω to +2.0V. Outputs open circuited. PRELIMINARY SY10EL1189 Micrel AC ELECTRICAL CHARACTERISTICS(1) VCC = 4.75 to 5.25V TA =–40°C Symbol Parameter TA = 0°C to 85˚C Min. Typ. Max. Min. Typ. Max. Unit Condition tPLH tPHL Propagation Delay to Output DR ➝ QR (Diff) (SE) DR ➝ QT (Diff) (SE) DT ➝ QT (Diff) (SE) 175 150 250 225 225 200 300 300 425 425 400 400 450 500 650 700 650 725 225 175 300 250 275 225 325 325 450 450 425 425 500 550 650 700 650 725 ps Note 2 Note 3 tPLH tPHL Propagation Delay SEL ➝ QT, QT 450 600 850 500 650 800 ps 1.5V to 50% Pt tr tf Rise/Fall Time (20% to 80%) QR, QR 100 275 400 125 275 400 ps tr tf Rise/Fall Time (20% to 80%) QT, QT 150 300 550 150 300 550 ps tskew Within Device Skew(4) VPP VCMR — 15 — — 15 — ps Minimum Input Swing(5) 200 — — 200 — — mV Common Mode Range(6) 3.00 — 4.35 3.00 — 4.35 V NOTES: 1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is mounted in a test socket or mounted on a printed circuit board and transverse air greater than 500lfm is maintained. 2. The differential propagation delay is defined as the delay from the crossing points of the differential input signals to the crossing point of the differential output signals. 3. The single-ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal. 4. Duty cycle skew is the difference between tPLH and tPHL propagation delay through a device. 5. Minimum input swing for which AC parameters are guaranteed. 6. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified range and the peak-to-peak voltage lies between VPP Min. and 1.0V. PRODUCT ORDERING CODE Ordering Code Package Type Operating Range SY10EL1189ZC Z16-2 Commercial SY10EL1189ZCTR Z16-2 Commercial 3 PRELIMINARY SY10EL1189 Micrel 16 LEAD SOIC .150" WIDE (Z16-2) Rev. 02 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated 4