VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Features Applications • Typical Rise Times of 100ps • SONET/SDH @ 622Mb/s, 1.244Gb/s, 2.488Gb/s • High-Speed Operation (Up to 2.5Gb/s NRZ Data) • Full-Speed Fibre Channel (1.062Gb/s) • 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 50Ω Input Clock and Data Termination 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 50Ω 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 D Q 50 Ω** M U X IBIAS1 DINTERM* 50 Ω** IBIAS2 NDIN IMOD VIP CLK 50 Ω** CLKTERM* VIB2 50 Ω** VIB1 NCLK MIB2 MIP MIB1 SELSEL *Terminated to Off-chip Capacitor **On Die Components G52200-0, Rev 3.0 03/05/01 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 1 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Electrical Characteristics Table 1: High-Speed Inputs and ECL Outputs VSS = -5.2V, RL = 50Ω at IOUT pin Symbol Parameter VIN Single-Ended Input Voltage Swing Min Typ Max Units 300 — — — — — 1500 mVp-p VCM = -2.0V VCM Differential Input Common-Mode Range VOH ECL Output HIGH Voltage -1200 VOL ECL Output LOW Voltage — VIN On-Chip Terminations 35 INOUT Maximum Peak Current (1) -2.3 60 — Conditions -1.3 V VSS = -5.2V — mV 50Ω to -2.0V -1600 mV 50Ω to -2.0V 65 Ω — mA VIP = VSS + 1.4V VIB1 = -5.2V VIB2 = -5.2V DIN = LOW VIP = -4.1V VIB1 = -5.2V VIB2 = -5.2V DIN = HIGH INOUT Maximum Peak Current — — 4 mA tR, tF Rise and Fall Times — — 100 ps 20% to 80% VIP = -4.1V VIB1 = -5.2V VIB2 = -5.2V DIN = LOW VOUT Output Voltage — — -3.0 V tSU Set-up Time - Data to CLK 20 50 — ps tH Hold Time — 50 90 ps Min Typ Max Units NOTE: (1) 100mA when RL = 30Ω at (N) OUT pin. Table 2: DC Characteristics Symbol Parameter Conditions VSS Power Supply Voltage -5.5 -5.2 -4.75 V IBIAS1, IBIAS2 Maximum Bias Current 30 — — mA VDCC Duty-Cycle Control Voltage VSS — VSS + 3V V VIH HIGH Level Input Voltage -1.15 -0.9 -0.8 V VREF = 1.3V VIL LOW Level Input Voltage — -1.7 -1.45 V VREF = 1.3V V V VIB1, VIB2 BIAS Control Voltage VSS — VSS +1.8 VIP Modulation Control Voltage VSS — VSS +1.4 Page 2 VIB1, 2 = VSS + 1.8V VIP = -5.2V © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] 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 Table 3: Power Dissipation Symbol Parameter Min Typ Max Units Conditions ISS Power Supply Current (VSS) — —- 120 mA VSS = -5.5V, IMOD = IBIAS = 0mA PD Total Power Dissipation — — 700 mW VSS = -5.5V, IMOD = IBIAS = 0 mA Min Typ Max Units Conditions — — 25 — — °C/W Ceramic Package °C/W Plastic Package Table 4: Package Thermal Specifications Symbol Parameter θJCC Thermal Resistance from Junction to Case θJCP Thermal Resistance from Junction to Case 15 Table 5: MUX Select Logic Table Symbol Rating VSS Clocked Data In GND Non-clocked Data In NC Non-clocked Data In Absolute Maximum Ratings(1) Power Supply Voltage (VSS) ............................................................................................................. VCC to -6.0V Operating Junction Temperature Range (TJ)............................................................................... -55°C to +125°C Storage Temperature Range (TS)................................................................................................. -65°C to +150°C 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) ............................................................................... -40°C to +85°C NOTE: (1) Lower limit of specification is ambient temperature and upper limit is case temperature G52200-0, Rev 3.0 03/05/01 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 3 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Figure 1: On-Chip Data and Clock Input Configuration GND DIN (CLK) DINTERM (CLKTERM) NDIN (NCLK) GND DATA BUFFER (CLOCK BUFFER) X 50 * 4.0K * 50 * 6.4K * X X *On-chip Components VSS VSS Figure 2: Single-Ended Operation 7937 0.1µf DATA SOURCE DIN DINTERM NDIN 0.1µf 0.1µf GND CLOCK SOURCE 0.1µf GND CLK CLKTERM NCLK 0.1µf 0.1µf GND GND Figure 3: Single-Ended AC-Coupled GND 0.1µf DIN (CLK) X SOURCE DINTERM (CLKTERM) 0.1µf NDIN (NCLK) 50 4.0K 50 6.4K X -2.0V X 0.1µf GND VSS GND Page 4 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] 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 0.1µf DIN (CLK) X SOURCE 0.1µf DINTERM (CLKTERM) 50 -2.0V X NDIN (NCLK) 0.1µf 4.0K 50 6.4K X GND VSS Figure 5: Differential DC-Coupled/Differential ECL GND DIN (CLK) X SOURCE DINTERM (CLKTERM) 50 -2.0V X NDIN (NCLK) 4.0K 50 6.4K X -2.0V G52200-0, Rev 3.0 03/05/01 VSS © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 5 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Figure 6: Control Signals VIP and VIB I (MIB) 30 mA 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 VIP X OUTPUT DIFF PAIR X IMOD Page 6 X VIB IBIAS X X MIP MIB © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] 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 Bare Die Pad Descriptions Figure 8: Pad Assignments for VSC7937 Die 1720 1620 50 120 120 150 30 PAD 34 PAD 33 PAD 32 PAD 31 PAD 30 PAD 29 DCC VSS VSS VSS VIP MIP PAD 28 PAD 27 PAD 26 MIP MIB2 MIB2 PAD 1 N/C PAD 25 VIB2 PAD 2 NDIN PAD 24 GND PAD 3 DIN PAD 23 N/C PAD 4 DINT PAD 22 NOUT PAD 5 CLOCKT PAD 21 GND PAD 6 CLOCK PAD 20 OUT PAD 7 NCLOCK PAD 19 N/C PAD 8 N/C PAD 18 GND SEL PAD 9 GND PAD 10 GND PAD 11 50 50 1620 1720 GND GND GND VIB1 MIB1 MIB1 PAD 12 PAD 13 PAD 14 PAD 15 PAD 16 PAD 17 50 Dimensions in micrometers (µm). G52200-0, Rev 3.0 03/05/01 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 7 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Package Pin Information Table 6: Pin Identifications Signal Type DIN, NDIN In DINTERM Ref Level # Pins DC Description 2 Data Input and Data Reference 1 Data Termination 2 Clock Input and Clock Reference 1 Clock Termination CLK, NCLK In CLKTERM Ref NOUT Out 1 Modulation Current Output (complementary) OUT Out 1 Modulation Current Output (to Laser Cathode) DC VSS Pwr Pwr 2 Negative Voltage Rail GND Pwr Pwr 6/14(1) Positive Voltage Rail VIP In DC 1 Modulation Control Node MIP In DC 1 Modulation Monitor Node VIB1, 2 In DC 2 Bias Control Node MIB1, 2 In DC 2 Bias Monitor Node DCC In DC 1 Duty Cycle Control SEL In DC 1 Total Pins 24/32 Clk/Non-clk Data Select (1) NOTE: (1) Applicable to 32-pin TQFP package only Page 8 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] 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 DCC VSS VSS VIP MIP MIB2 Figure 9: Pin Diagram—24-Pin Ceramic Package 24 23 22 21 20 19 18 GND DINTERM 3 16 NOUT CLKTERM 4 15 GND CLK 5 14 OUT NCLK 6 GND G52200-0, Rev 3.0 03/05/01 7 8 9 10 11 13 12 MIB1 17 VIB1 2 GND DIN GND VIB2 GND 1 SEL NDIN © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 9 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver GND MIB2 MIP VIP VSS VSS DCC GND Figure 10: Pin Diagram—32-Pin Plastic Package GND GND NDIN VIB2 DIN GND NOUT DINT Page 10 GND GND MIB1 GND VIB1 GND GND NCLK GND OUT GND CLK SEL GND GND CLKT © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] 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—24-Pin Ceramic Package (Formed Leads) Top View A 24 23 22 21 20 19 INDEX E 18 1 2 17 3 16 4 15 5 14 6 13 Key mm In A 9.5 0.374 B 7.7 0.303 C 2.0 0.079 D 1.27 0.050 E 0.30 0.012 F 1.7 0.067 G 0.6 0.024 H 11.5 0.453 I 0.125 0.005 J 8.51 0.335 A 7 8 9 10 D 11 12 Side View B G I F J H C NOTES: Drawing not to scale. Package #: 101-000-0 Issue #:1 G52200-0, Rev 3.0 03/05/01 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 11 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Package Information—24-Pin Ceramic Package (Straight Leads) Top View Key mm In A 9.5 0.374 B 7.7 0.303 A 24 23 22 21 20 19 INDEX E 18 1 2 17 3 16 4 15 5 14 6 13 C 5.8 .230 D 1.27 0.050 E 0.30 0.012 F 1.7 0.067 G 0.6 0.024 H 9.53 0.375 I 0.125 0.005 J 8.51 0.335 A 7 8 9 10 D 11 12 Side View B I G C H F C NOTES: Drawing not to scale. Package #: 101-000-0 Issue #:1 Page 12 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] 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 Note: G52200-0, Rev 3.0 03/05/01 Dimension mm Tolerance A 1.60 MAX A1 .10 ±.05 A2 1.40 ±.05 D 9.00 ±.20 D1 7.00 ±.10 E 9.00 ±.20 E1 7.00 ±.10 L .60 +.15/-.10 e .80 BASIC b .35 ±.05 θ 0º - 7º ddd .20 MAX ccc .10 MAX Package lid and bottom heat spreader are electrically connected to GND within the package. © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com Page 13 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7937 Single Supply 2.5Gb/s Voltage Driver Ordering Information The order number for this product is formed by a combination of the device number, and package style. VSC7937 XX Device Type VSC7937: 2.5Gb/s Voltage/EML Driver 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 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com G52200-0, Rev 3.0 03/05/01