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| VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Features * Typical Rise Times of 100ps * High-Speed Operation (Up to 2.5Gb/s NRZ Data) * 3V Output Voltage Compliance * Single-Ended or Differential Input Operation * Single Power Supply: +5V or -5.2V * Direct Access to Modulation and Bias FETs * On-Die MUX for Clocked or Unclocked Applications * On-Chip 50 Input Clock and Data Termination Single Supply 2.5Gb/s Voltage Driver Applications * SONET/SDH @ 622Mb/s, 1.244Gb/s, 2.488Gb/s * Full-Speed Fibre Channel (1.062Gb/s) General Description The VSC7937 is a single -5.2V supply, 2.5Gb/s voltage driver with direct access to the output modulation and bias FETs. The output stage can drive 60mA into 50 with adequate output voltage compliance. Output bias and modulation currents are set by external components allowing precision monitoring and setting of the output voltage levels. VSC7937 Block Diagram NOUT OUT INOUT DIN 50 ** DINTERM* 50 ** NDIN DQ M U X IBIAS1 IMOD IBIAS2 VIP CLK 50 ** CLKTERM* NCLK MIB2 SEL SEL MIP MIB1 50 ** VIB2 VIB1 *Terminated to Off-chip Capacitor **On Die Components G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 1 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver VSC7937 Electrical Characteristics Table 1: High-Speed Inputs and ECL Outputs VSS = -5.2V, RL = 50 at IOUT pin Symbol VIN VCM VOH VOL VIN INOUT Parameter Single-Ended Input Voltage Swing Differential Input Common-Mode Range ECL Output HIGH Voltage ECL Output LOW Voltage On-Chip Terminations Maximum Peak Current (1) Min 300 -2.3 -1200 Typ -- -- -- -- -- -- Max 1500 -1.3 Units V mV mV mA Conditions VSS = -5.2V 50 to -2.0V 50 to -2.0V VIP = VSS + 1.4V VIB1 = -5.2V VIB2 = -5.2V DIN = LOW VIP = -4.1V VIB1 = -5.2V VIB2 = -5.2V DIN = HIGH 20% to 80% VIP = -4.1V VIB1 = -5.2V VIB2 = -5.2V DIN = LOW mVp-p VCM = -2.0V -- -1600 65 -- -- 35 60 INOUT tR, tF VOUT tSU tH Maximum Peak Current Rise and Fall Times Output Voltage Set-up Time - Data to CLK Hold Time -- -- -- 20 -- -- -- -- 50 50 4 100 -3.0 -- 90 mA ps V ps ps NOTE: (1) 100mA when RL = 30 at (N) OUT pin. Table 2: DC Characteristics Symbol VSS IBIAS1, IBIAS2 VDCC VIH VIL VIB1, VIB2 VIP Parameter Power Supply Voltage Maximum Bias Current Duty-Cycle Control Voltage HIGH Level Input Voltage LOW Level Input Voltage BIAS Control Voltage Modulation Control Voltage Min -5.5 30 VSS -1.15 -- VSS VSS Typ -5.2 -- -- -0.9 -1.7 -- -- Max -4.75 -- VSS + 3V -0.8 -1.45 VSS +1.8 VSS +1.4 Units V mA V V V V V Conditions VIB1, 2 = VSS + 1.8V VIP = -5.2V VREF = 1.3V VREF = 1.3V Page 2 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Table 3: Power Dissipation Symbol ISS PD Single Supply 2.5Gb/s Voltage Driver Parameter Power Supply Current (VSS) Total Power Dissipation Min -- -- Typ ---- Max 120 700 Units mA mW Conditions VSS = -5.5V, IMOD = IBIAS = 0mA VSS = -5.5V, IMOD = IBIAS = 0 mA Table 4: Package Thermal Specifications Symbol JCC JCP Parameter Thermal Resistance from Junction to Case Thermal Resistance from Junction to Case Min -- -- Typ 25 15 Max -- -- Units C/W C/W Conditions Ceramic Package Plastic Package Table 5: MUX Select Logic Table Symbol VSS GND NC Clocked Data In Non-clocked Data In Non-clocked Data In Rating Absolute Maximum Ratings(1) Power Supply Voltage (VSS) ............................................................................................................. VCC to -6.0V Operating Junction Temperature Range (TJ)............................................................................... -55C to +125C Storage Temperature Range (TS)................................................................................................. -65C to +150C NOTE: (1) CAUTION: Stresses listed under "Absolute Maximum Ratings" may be applied to devices one at a time without causing permanent damage. Functionality at or above the values listed is not implied. Exposure to these values for extended periods may affect device reliability. Recommended Operating Conditions Positive Voltage Rail (GND) ..............................................................................................................................0V Negative Voltage Rail (VSS) .......................................................................................................................... -5.2V Operational Case Temperature Range (TC)(1) ............................................................................... -40C to +85C NOTE: (1) Lower limit of specification is ambient temperature and upper limit is case temperature G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 3 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver Figure 1: On-Chip Data and Clock Input Configuration GND DIN (CLK) DINTERM (CLKTERM) NDIN (NCLK) VSC7937 GND DATA BUFFER (CLOCK BUFFER) X * 50 * * 4.0K 6.4K X * 50 X *On-chip Components VSS VSS Figure 2: Single-Ended Operation 7937 DATA SOURCE 0.1f GND 0.1f DIN DINTERM NDIN 0.1f 0.1f GND CLOCK SOURCE 0.1f GND CLK CLKTERM NCLK 0.1f GND Figure 3: Single-Ended AC-Coupled GND 0.1f SOURCE DINTERM (CLKTERM) DIN (CLK) X 50 4.0K -2.0V 50 6.4K X X 0.1f GND NDIN (NCLK) 0.1f VSS GND Page 4 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Figure 4: Differential AC-Coupled GND 0.1f SOURCE 0.1f DIN (CLK) X DINTERM (CLKTERM) 50 4.0K -2.0V X 0.1f GND NDIN (NCLK) 50 6.4K X VSS Figure 5: Differential DC-Coupled/Differential ECL GND DIN (CLK) X SOURCE DINTERM (CLKTERM) 50 4.0K -2.0V X NDIN (NCLK) 50 6.4K X -2.0V VSS G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 5 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver Figure 6: Control Signals VIP and VIB I (MIB) 30 mA VSC7937 VIB VSS + 1.5 Volts (Typical) Typical Bias Current v.s. Bias Voltage I (MIP) 60 mA VIP VSS + 1.1 Volts (Typical) Typical Modulation Current v.s. Modulation Voltage Figure 7: Simplified Output Structure NOUT OUT X X VIP X IMOD OUTPUT DIFF PAIR IBIAS X VIB X MIP X MIB Page 6 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Bare Die Pad Descriptions Single Supply 2.5Gb/s Voltage Driver Figure 8: Pad Assignments for VSC7937 Die 1720 1620 50 50 50 120 120 150 PAD 34 PAD 33 PAD 32 PAD 31 PAD 30 PAD 29 DCC VSS VSS VSS VIP MIP PAD 1 N/C PAD 2 NDIN PAD 3 DIN PAD 4 DINT PAD 5 CLOCKT PAD 6 CLOCK PAD 7 NCLOCK PAD 8 N/C SEL PAD 9 GND PAD 10 GND PAD 11 PAD 28 PAD 27 PAD 26 MIP MIB2 MIB2 PAD 25 VIB2 PAD 24 GND PAD 23 N/C PAD 22 NOUT PAD 21 GND PAD 20 OUT PAD 19 N/C PAD 18 GND 30 1620 1720 GND GND GND VIB1 MIB1 MIB1 PAD 12 PAD 13 PAD 14 PAD 15 PAD 16 PAD 17 50 Dimensions in micrometers (m). G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 7 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver VSC7937 Package Pin Information Table 6: Pin Identifications Signal DIN, NDIN DINTERM CLK, NCLK CLKTERM NOUT OUT VSS GND VIP MIP VIB1, 2 MIB1, 2 DCC SEL Total Pins Type In Ref In Ref Out Out Pwr Pwr In In In In In In Level DC DC # Pins 2 1 2 1 1 1 Data Termination Description Data Input and Data Reference Clock Input and Clock Reference Clock Termination Modulation Current Output (complementary) Modulation Current Output (to Laser Cathode) Negative Voltage Rail Positive Voltage Rail Modulation Control Node Modulation Monitor Node Bias Control Node Bias Monitor Node Duty Cycle Control Clk/Non-clk Data Select Pwr Pwr DC DC DC DC DC DC 2 6/14(1) 1 1 2 2 1 1 24/32 (1) NOTE: (1) Applicable to 32-pin TQFP package only Page 8 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Figure 9: Pin Diagram--24-Pin Ceramic Package MIB2 DCC VSS VSS NDIN DIN DINTERM CLKTERM CLK NCLK 24 1 2 3 4 5 6 7 23 22 21 20 MIP VIP 19 18 17 16 15 14 VIB2 GND NOUT GND OUT GND 8 9 10 11 13 12 SEL GND GND GND VIB1 MIB1 G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 9 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver Figure 10: Pin Diagram--32-Pin Plastic Package VSC7937 MIB2 GND GND DCC VSS VSS MIP VIP GND NDIN DIN DINT CLKT CLK NCLK GND GND VIB2 GND NOUT GND OUT GND GND GND GND VIB1 GND GND Page 10 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com MIB1 GND SEL G52200-0, Rev 3.0 03/05/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Package Information--24-Pin Ceramic Package (Formed Leads) Top View A 24 23 22 21 20 19 Key A B C D E F E mm 9.5 7.7 2.0 1.27 0.30 1.7 0.6 11.5 0.125 8.51 In 0.374 0.303 0.079 0.050 0.012 0.067 0.024 0.453 0.005 0.335 INDEX G 18 17 16 15 14 13 1 2 3 A 4 5 6 H I J 7 8 9 10 11 D 12 Side View B I J H C G F NOTES: Drawing not to scale. Package #: 101-000-0 Issue #:1 G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 11 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver VSC7937 Package Information--24-Pin Ceramic Package (Straight Leads) Top View A 24 23 22 21 20 19 Key A B C D E F E mm 9.5 7.7 5.8 1.27 0.30 1.7 0.6 9.53 0.125 8.51 In 0.374 0.303 .230 0.050 0.012 0.067 0.024 0.375 0.005 0.335 INDEX G 18 17 16 15 14 13 1 2 3 A 4 5 6 H I J 7 8 9 10 11 D 12 Side View B I G F C H C NOTES: Drawing not to scale. Package #: 101-000-0 Issue #:1 Page 12 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Package Information--32 Pin Plastic TQFP Package Dimension A A1 A2 D D1 E E1 L e b ddd ccc mm 1.60 .10 1.40 9.00 7.00 9.00 7.00 .60 .80 .35 0 - 7 .20 .10 Tolerance MAX .05 .05 .20 .10 .20 .10 +.15/-.10 BASIC .05 MAX MAX Note: Package lid and bottom heat spreader are electrically connected to GND within the package. G52200-0, Rev 3.0 03/05/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 13 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet Single Supply 2.5Gb/s Voltage Driver VSC7937 Ordering Information The order number for this product is formed by a combination of the device number, and package style. VSC7937 Device Type VSC7937: 2.5Gb/s Voltage/EML Driver XX Package Style KJ: (Ceramic - Straight Leads) KJL: (Ceramic- Formed Leads) KJRL: (Ceramic - Reversed Formed Leads}* RA: (32 Pin QFP Gull Wing Plastic Package} X : (Bare Die) *Optional Reversed Formed Leads: Package leads have the same profile and dimensions, but heat spreader is away from board. Please contact the factory for additional information. Notice Vitesse Semiconductor Corporation ("Vitesse") provides this document for informational purposes only. This document contains pre-production information about Vitesse products in their concept, development and/or testing phase. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is subject to change without notice at any time. Nothing contained in this document shall be construed as extending any warranty or promise, express or implied, that any Vitesse product will be available as described or will be suitable for or will accomplish any particular task. Vitesse products are not intended for use in life support appliances, devices or systems. Use of a Vitesse product in such applications without written consent is prohibited. Page 14 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01 |
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