VSC7126 Vitesse Semiconductor Corp., VSC7126 Datasheet

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VSC7126

Manufacturer Part Number
VSC7126
Description
Manufacturer
Vitesse Semiconductor Corp.
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
VSC7126QX
Manufacturer:
VITESSE
Quantity:
1 831
VSC7126
Datasheet
3/4/99
G52148-0, Rev. 4.3
Features
General Description
strained applications. It accepts two 10-bit 8B/10B encoded transmit characters, latches them on the rising edge
of TBC and serializes the data onto the TX+/- PECL differential outputs at a baud rate which is twenty times the
TBC frequency. It also samples serial receive data on the RX+/- PECL differential inputs, recovers the clock
and data, deserializes it onto two 10-bit receive characters, outputs a recovered clocks at one twentieth of the
incoming baud rate and detects Fibre Channel “Comma” characters. The VSC7126 contains on-chip PLL cir-
cuitry for synthesis of the baud-rate transmit clock, and extraction of the clock from the received serial stream.
These circuits are fully monolithic and require no external components.
VSC7126 Block Diagram
The VSC7126 is a full-speed Fibre Channel Transceiver optimized for Host Adapter and other space- con-
• ANSI X3T11 Fibre Channel Compatible 1.0625
• GLM Compatible (FCSI-301-Rev 1.0)
• 20 Bit TTL Interface For Transmit And Receive Data
• Monolithic Clock Synthesis And Clock Recovery -
• 53.125 MHz TTL Reference Clock
COM_DET
L_UNUSE
EN_CDET
Gbps Full-duplex Transceiver
No External Components
EWRAP
RBC(0)
RBC(1)
TXEN#
R0:19
T0:19
TBC
20
20
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
53.125 MHz
Q D
53.125 MHz
Frame
Logic
D Q
VITESSE
Multiply (x20)
VITESSE SEMICONDUCTOR CORPORATION
SEMICONDUCTOR CORPORATION
PLL Clock
to Serial
Comma
Parallel
Serial to
Detect
Parallel
20
Retimed
Recovered
Data
Clock
Q D
Synthesized
Serial Data
Clock
• Automatic Lock-to-Reference Function
• Suitable For Both Copper And Fiber
• Low Power Operation - 850 mW
• 80 Pin, 14x14 mm PQFP
• Single +3.3V Power Supply
Recovery
Optical Link Applications
Clock
D Q
2:1
1.0625 Gbits/sec Fibre
Channel Transceiver
TX+
TX-
RX+
RX-
Page 1

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VSC7126 Summary of contents

Page 1

... MHz TTL Reference Clock General Description The VSC7126 is a full-speed Fibre Channel Transceiver optimized for Host Adapter and other space- con- strained applications. It accepts two 10-bit 8B/10B encoded transmit characters, latches them on the rising edge of TBC and serializes the data onto the TX+/- PECL differential outputs at a baud rate which is twenty times the TBC frequency ...

Page 2

... PLL which does not require any external components. Serializer: The VSC7126 accepts TTL input data as two parallel 10 bit characters on the T0:19 bus which is latched into the input latch on the rising edge of TBC. This data will be serialized and transmitted on the TX PECL dif- ferential outputs at a baud rate of twenty times the frequency of the TBC input, with bit T0 transmitted first. ...

Page 3

... RBC(0). If serial input data is not present, or does not meet the required baud rate, the VSC7126 will continue to produce a recovered clock so that downstream logic may continue to function. In the absence of a signal, the RBC(0)/RBC(1) output clocks will immediately lock to the TBC reference clock ...

Page 4

... Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION K28.5 TChar TChar TChar TChar TChar PC K28.5 TChar TChar PC PC TChar TChar TChar VITESSE SEMICONDUCTOR CORPORATION Datasheet VSC7126 TChar TChar TChar K28.5 TChar TChar TChar TChar G52148-0, Rev. 4.3 3/4/99 ...

Page 5

... Datasheet VSC7126 AC Characteristics TBC T0:19 Data Valid 20 Bit Data Table 1: Transmit AC Characteristics Parameters Description T0:19 Setup time to the T 1 rising edge of TBC T0:19 hold time after the T 2 rising edge of TBC T ,T TX+/TX- rise and fall time SDR SDF Latency from rising edge T of TBC to T0 appearing on ...

Page 6

... VITESSE SEMICONDUCTOR CORPORATION Datasheet VSC7126 Data Valid Units Conditions Measured between the 1.4V ns. point of RBC(0) and a valid level of R0:19 or COM_DET. All outputs ns. driving 10pF load. Nominal delay is 20 bit ps. times. Tested on sample basis ...

Page 7

... Datasheet VSC7126 TBC Table 3: Reference Clock Requirements Parameters Description FR Frequency Range FO Frequency Offset T ,T Pulse Width, Low / High TBC duty cycle T ,T TBC rise and fall time RCR RCF Total jitter tolerance REFCLK G52148-0, Rev. 4.3 3/4/99 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 ...

Page 8

... VITESSE SEMICONDUCTOR CORPORATION Datasheet VSC7126 Units Conditions — - 2200 – 2 2200 – 2 3200 mV 5 ...

Page 9

... Datasheet VSC7126 Figure 7: Parametric Measurement Information Serial Input Rise and Fall Time T r Receiver Input Eye Diagram Jitter Tolerance Mask Serial Output Load G52148-0, Rev. 4.3 3/4/99 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION TTL Input and Output Rise and Fall Time ...

Page 10

... VITESSE SEMICONDUCTOR CORPORATION Datasheet VSC7126 Trigger Digitizing Scope Trigger Digitizing Scope Deterministic jitter (DJ) mea- surements performed according to Fibre Channel 4.3 Annex A, Test Methods, Section A.4.3. Measure time of all the 50% points of all ten transitions ...

Page 11

... Datasheet VSC7126 Input Structures INPUT INPUT INPUT G52148-0, Rev. 4.3 3/4/99 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION Figure 9: Input Structures V +3 Current Limit R R GND TBC and TTL Inputs +3.3 V All Resistors 3.3K GND High Speed Differential Input ...

Page 12

... PLL. Transmitter Serial Outputs. These pins output the serialized transmit data when EWRAP is LOW. When EWRAP is HIGH, TX+ is HIGH and TX- is LOW. VITESSE SEMICONDUCTOR CORPORATION Datasheet VSC7126 INPUTS - TTL INPUT - TTL OUTPUTS - Differential PECL (AC Coupling recommended) G52148-0, Rev. 4.3 ...

Page 13

... Datasheet VSC7126 Pin # Name 65,63,59,57, 55,52,50,48, 45,43,64,62, R0:19 58,56,54,51, 49,47,44,42 34 EWRAP 70 RX+ 69 RX- 39 RBC(0) 38 RBC(1) 27 EN_CDET 37 COMDET 35 TXEN# 66 LUNUSE 26 TEST1 28 TEST2 29 TEST3 1,21,30,68,72 VSS 40,41,60,61 VSST 74 VSSA 7,13,25,32,33, VDD 67,71,75 36,46,53 VDDT 76,80 VDDP 73 VDDA 78 N/C G52148-0, Rev. 4.3 3/4/99 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION Description Receive Data Bus, Bits 0 thru 19 20-bit received character ...

Page 14

... Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION 80-pin PQFP Package Drawing 0.30 RAD. TYP 0.20 RAD. TYP. A 0.25 0° - 8° 0.17 MAX. J VITESSE SEMICONDUCTOR CORPORATION Datasheet VSC7126 Item 14 mm Tolerance A 2.35 MAX D 2.00 +0.10/-0.05 E 0.30 ±.05 F 17.20 ±.25 G 14.00 ±.10 H 17.20 ± ...

Page 15

... Datasheet VSC7126 Package Thermal Characteristics The VSC7126 is packaged PQFP with an integrated heat spreader. These packages use indus- try-standard EIAJ footprints, but have been enhanced to improve thermal dissipation. The construction of the packages is as shown in Figure 11. Figure 11: Package Cross Section - 14 mm package ...

Page 16

... Channel Transceiver Ordering Information The order number for this product is formed by a combination of the device number, and package type. Device Type VSC7126: 1.0625 Gbps Transceiver Package Style QX: 80-pin PQFP Notice Vitesse Semiconductor Corporation reserves the right to make changes in its products, specifications or other information at any time without prior notice ...

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