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VSC7937RA Datasheet Preview

VSC7937RA Datasheet

Single Supply 2.5Gb/s Voltage Driver

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VSC7937RA pdf
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7937
Single Supply 2.5Gb/s Voltage Driver
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 50Input Clock and Data Termination
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 50with 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
DINTERM*
NDIN
CLK
CLKTERM*
NCLK
50 **
50 **
50 **
50 **
*Terminated to Off-chip Capacitor
**On Die Components
DQ
M
U
X
VIP
VIB2
SELSEL
IBIAS2
IMOD
IBIAS1
MIB2
MIP MIB1
VIB1
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: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1



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VSC7937RA Datasheet Preview

VSC7937RA Datasheet

Single Supply 2.5Gb/s Voltage Driver

No Preview Available !

VSC7937RA pdf
VITESSE
SEMICONDUCTOR CORPORATION
Single Supply 2.5Gb/s Voltage Driver
Preliminary Data Sheet
VSC7937
Electrical Characteristics
Table 1: High-Speed Inputs and ECL Outputs
VSS = -5.2V, RL = 50at IOUT pin
Symbol
Parameter
VIN Single-Ended Input Voltage Swing
VCM Differential Input Common-Mode Range
VOH ECL Output HIGH Voltage
VOL ECL Output LOW Voltage
VIN On-Chip Terminations
INOUT
Maximum Peak Current(1)
INOUT
Maximum Peak Current
tR, tF Rise and Fall Times
VOUT
Output Voltage
tSU Set-up Time - Data to CLK
tH Hold Time
NOTE: (1) 100mA when RL = 30at (N) OUT pin.
Table 2: DC Characteristics
Symbol
Parameter
VSS
IBIAS1,
IBIAS2
Power Supply Voltage
Maximum Bias Current
VDCC
Duty-Cycle Control Voltage
VIH HIGH Level Input Voltage
VIL LOW Level Input Voltage
VIB1, VIB2 BIAS Control Voltage
VIP Modulation Control Voltage
Min Typ Max Units
Conditions
300 1500 mVp-p VCM = -2.0V
-2.3 -1.3
V VSS = -5.2V
-1200 — — mV 50to -2.0V
— — -1600 mV 50to -2.0V
35 65
VIP = VSS + 1.4V
60
mA
VIB1 = -5.2V
VIB2 = -5.2V
DIN = LOW
VIP = -4.1V
——
4
mA
VIB1 = -5.2V
VIB2 = -5.2V
DIN = HIGH
— — 100 ps 20% to 80%
VIP = -4.1V
-3.0
V
VIB1 = -5.2V
VIB2 = -5.2V
DIN = LOW
20 50 ps
50 90 ps
Min Typ Max Units
Conditions
-5.5 -5.2 -4.75 V
30
mA
VIB1, 2 = VSS + 1.8V
VIP = -5.2V
VSS
VSS +
3V
V
-1.15 -0.9 -0.8
-1.7 -1.45
VSS
VSS
+1.8
V VREF = 1.3V
V VREF = 1.3V
V
VSS
VSS
+1.4
V
Page 2
© 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


Part Number VSC7937RA
Description Single Supply 2.5Gb/s Voltage Driver
Maker ETC
Total Page 14 Pages
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