April 2005 CLC002 SMPTE 292M / 259M Serial Digital Cable Driver General Description Features The CLC002 SMPTE 292M / 259M serial digital cable driver is a monolithic, high-speed cable driver designed for use in SMPTE 292M / 259M serial digital video and ITU-T G.703 serial digital data transmission applications. The CLC002 drives 75Ω transmission lines (Belden 8281, Belden 1694A or equivalent) at data rates up to 1.485 Gbps. n SMPTE 292M, SMPTE 344M and SMPTE 259M compliant n Data rates to 1.485 Gbps n Differential input n 75Ω differential output n Selectable slew rate n Adjustable output amplitude n Single 3.3V supply operation n Replaces the GS1528 and GS1528A The CLC002 provides two selectable slew rates for SMPTE 259M and SMPTE 292M compliance. The output voltage swing is adjustable from 800 mVP-P to 1.0 VP-P using an external resistor. Applications n SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital interfaces n Sonet/SDH and ATM interfaces n Digital routers and distribution amplifiers n Buffer applications Typical Application 20087602 © 2005 National Semiconductor Corporation DS200876 www.national.com CLC002 SMPTE 292M / 259M Serial Digital Cable Driver PRELIMINARY CLC002 Absolute Maximum Ratings (Note 1) Supply Voltage: Input Voltage (all inputs) Recommended Operating Conditions −0.5V to 3.6V −0.3V to VCC+0.3V Output Current ESD Rating (HBM) 3.3V ± 5% Supply Voltage (VCC – VEE): 28mA Operating Free Air Temperature (TA) 0˚C to +70˚C 2kV DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Symbol Parameter VCMIN Input Common Mode Voltage VSDI Input Voltage Swing IIN Input Current Conditions Reference SDI, SDI Differential VCMOUT Output Common Mode Voltage VSDO Output Voltage Swing SD/HD Input Max Units 1.6 + VSDI/2 Min VCC – VSDI/2 V 100 2000 mVP−P SDO, SDO Typ 3.5 µA VCC – VSDO V Single-ended, 75Ω load, RREF = 750Ω 1% 720 800 880 mVP-P Single-ended, 75Ω load, RREF = TBD 900 1000 1100 mVP-P 0.8 V Min for SD SD/HD 2.4 V Max for HD ICC Supply Current 48 mA AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter DRSDI Input Data Rate tjit Additive Jitter Conditions Reference Min 1.485 Gbps SDO, SDO 270 Mbps tr,tf Output Rise Time, Fall Time Typ SDI, SDI SD/HD = 0, 20% – 80% SD/HD = 1, 20% – 80% 400 Output Overshoot RLSDO Output Return Loss Units Mbps 15 psP-P 25 psP-P TBD 220 ps TBD 800 ps 30 ps Mismatch in Rise/Fall Time tOS Max 1485 Note 4 8 15 18-20 % dB Note 1: "Absolute Maximum Ratings" are those parameter values beyond which the life and operation of the device cannot be guaranteed. The stating herein of these maximums shall not be construed to imply that the device can or should be operated at or beyond these values. The table of "Electrical Characteristics" specifies acceptable device operating conditions. Note 2: Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated referenced to VEE = 0 Volts. Note 3: Typical values are stated for VCC = +3.3V and TA = +25˚C. Note 4: Specification is guaranteed by design. www.national.com 2 CLC002 Connection Diagram 20087601 8-Pin SOIC Order Number CLC002MA See NS Package Number M08A Pin Descriptions Pin # Name Description 1 SDI Serial data true input. 2 SDI Serial data complement input. 3 VEE Negative power supply (ground). 4 RREF Output driver level control. Connect a resistor to VCC to set output voltage swing. 5 VCC Positive power supply (+3.3V). 6 SD/HD Output slew rate control. Output rise/fall time complies with SMPTE 292M when low and SMPTE 259M when high. 7 SDO Serial data complement output. 8 SDO Serial data true output. OUTPUT SLEW RATE CONTROL The CLC002 output rise and fall times are selectable for either SMPTE 259M or SMPTE 292M compliance via pin 6, SD/HD. For slower rise and fall times, or SMPTE 259M compliance, SD/HD is set high. For faster rise and fall times, or SMPTE 292M compliance, SD/HD is set low. Device Operation INPUT INTERFACING The CLC002 accepts either differential or single-ended input. OUTPUT INTERFACING The CLC002 uses current mode outputs. Single-ended output levels range from 800 mVP-P to 1.0 VP-P ± 10% into 75Ω AC-coupled coaxial cable. Output level is controlled by the value of RREF connected between pin 4 and VCC. REPLACING THE GENNUM GS1528 The CLC002 is form-fit-function compatible with the Gennum GS1528. 3 www.national.com CLC002 SMPTE 292M / 259M Serial Digital Cable Driver Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin SOIC Order Number CLC002MA NS Package Number M08A National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. 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