AM79761YC-10 Advanced Micro Devices, AM79761YC-10 Datasheet

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AM79761YC-10

Manufacturer Part Number
AM79761YC-10
Description
Physical layer 10-Bit transceiver for gigabit Ethernet
Manufacturer
Advanced Micro Devices
Datasheet
Am79761
Physical Layer 10-Bit Transceiver for Gigabit Ethernet
(GigaPHY™-SD)
DISTINCTIVE CHARACTERISTICS
n Gigabit Ethernet Transceiver operates at
n Suitable for both Coaxial and Optical Link
n 10-bit TTL Interface for Transmit and Receive
n Monolithic Clock Synthesis and Clock Recovery
n Word Synchronization Function (Comma
GENERAL DESCRIPTION
The Am79761 Gigabit Ethernet Physical Layer Serial-
izer/Deserializer (GigaPHY-SD) device is a 1.25 Gbps
Ethernet Transceiver optimized for Gigabit Ethernet/
1000BASE-X applications. It implements the Physical
Medium Attachment (PMA) layer for a single port.
The GigaPHY-SD device can interface to fiber-optic
media to support 1000BASE-LX and 1000BASE-SX
applications and can interface to copper coax to sup-
port 1000BASE-CX applications.
The functions performed by the device include serializ-
ing the 8B/10B 10-bit data for transmission, deserializ-
ing received code groups, recovering the clock from the
incoming data stream, and word synchronization.
This document contains information on a product under development at Advanced Micro Devices. The information
is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed
product without notice.
1.25 Gigabits per second (Gbps)
applications
Data
requires no external components
Detect)
PRELIMINARY
n Low Power Operation - 700 mW typical
n 64-pin Standard PQFP
n 125 MHz TTL Reference Clock
n Loopback Diagnostic
n Single +3.3 V Supply
When transmitting, the GigaPHY-SD device receives
10-bit 8B/10B code groups at 125 million code groups
per second. It then serializes the parallel data stream,
adding a reference clock, and transmits it through the
PECL drivers.
When receiving, the GigaPHY-SD device receives the
PECL data stream from the network. It then recovers
the clock from the data stream, deserializes the data
stream into a 10-bit code group, and transmits it to the
Physical Coding Sublayer (PCS) logic above. Option-
ally, it detects comma characters used to align the in-
coming word.
— 14 x 14 mm (0˚ C - 70˚ C)
— 10 x 10 mm (0˚ C - 50˚ C)
Publication# 21560
Issue Date: April 1998
Rev: A Amendment/+1

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AM79761YC-10 Summary of contents

Page 1

... This document contains information on a product under development at Advanced Micro Devices. The information is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice ...

Page 2

BLOCK DIAGRAM 10 TXD[0: PLL Clock REFCLK EWRAP 10 RXD[0: RCLK RCLKN Frame Logic COM_DET EN_CDET Parallel to Serial Multiply Serial to Parallel Comma ...

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CONNECTION DIAGRAM DVSS 1 TXD0 2 TXD1 3 TXD2 4 DVDD 5 TXD3 6 TXD4 7 TXD5 8 TXD6 9 DVDD 10 TXD7 11 TXD8 12 TXD9 13 DVSS 14 DVSS 15 N/C 16 Note: N Connect LOGIC ...

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... AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the elements below. Am79761 Y C Valid Combinations Am79761YC -10 Am79761YC - -10 PACKAGE SIZE OPTION - body size - body size TEMPERATURE RANGE C = Commercial (0˚ ...

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RELATED PRODUCTS Part No. Description Am7990 Local Area Network Controller for Ethernet (LANCE) Am7992B Serial Interface Adapter (SIA) Am7996 IEEE 802.3/Ethernet/Cheapernet Transceiver Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE) Am79C98 Twisted Pair Ethernet Transceiver (TPEX) Am79C100 Twisted Pair ...

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PIN DESIGNATION Listed by Pin Number Pin No. Pin Name Pin No. 1 DVSS 2 TXD0 3 TXD1 4 TXD2 5 DVDD 6 TXD3 7 TXD4 8 TXD5 9 TXD6 10 DVDD 11 TXD7 12 TXD8 13 TXD9 14 DVSS ...

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PIN DESCRIPTION TX+, TX- Serial Transmit Data PECL Output These pins are the 1000BASE-X port differential driv- ers which transmit the serial stream to the network. These pins are connected to the copper or fiber optic connectors. When EWRAP is ...

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AVDD Analog Power These pins supply power to the analog blocks of the device. They must be connected source and require careful decoupling to ensure proper device performance. DVSS Ground These pins are the ground ...

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FUNCTIONAL DESCRIPTION Overview The GigaPHY-SD device provides the PMA functionality for 1000BASE-X systems. The GigiaPHY-SD communi- cates with the PCS through the 10-bit code groups and communicates with the Physical Medium Dependent (PMD) layer to transmit and receive data from ...

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Word Alignment The Am79761 device provides 7-bit comma character recognition and data word alignment. Word synchroni- zation is enabled by asserting EN_CDET HIGH. When synchronization is enabled, the Am79761 device con- stantly examines the serial data for the presence of ...

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RCLK RCLKN COM_DET RXD[0:9] Potentially Corrupted Figure 19. Receiving Two Consecutive K28.5 + TCharacter Transmission Words K28.5 TChar TChar TChar Am79761 K28.5 TChar 21560A-5 11 ...

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ABSOLUTE MAXIMUM RATINGS Storage Temperature . . . . . . . . . . . .- +150 C Ambient Temperature Under Bias . .- +125 C Power Supply Voltage ( ...

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VDD Current INPUT Limit VSS REFCLK and TTL Inputs A Figure 20. Input Structures D VDD INPUT INPUT D VSS High Speed Differential Input (RX ...

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KEY TO SWITCHING WAVEFORMS WAVEFORM AC CHARACTERISTICS REFCLK TXD[0:9] Data Valid 10 Bit Data Symbol Parameter Description TXD[0:9] Setup time to the rising T 1 edge of REFCLK TXD[0:9] hold time after the rising T 2 edge of REFCLK T ...

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AC CHARACTERISTICS (Continued) RCLK RCLKN RXD[0:9] Data Valid Symbol Parameter Description Data or COM_DET Valid prior RCLK/RCLKN rise Data or COM_DET Valid after T 2 RCLK or RCLKN rise Deviation of RCLK rising edge to RCLKN rising ...

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REFERENCE CLOCK REQUIREMENTS REFCLK Symbol Parameter Description FR Frequency Range FO Frequency Offset DC REFCLK duty cycle T ,T REFCLK rise and fall time RCR RCF ...

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MEASUREMENTS Serial Input Rise and Fall Time T r Receiver Input Eye Diagram Jitter Tolerance Task Mask Serial Output Load Z = 75W 0 Figure 24. Parametric Measurement Information ...

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MEASUREMENTS (Continued) BERT Pattern Generator CLK = 1.25 GHz DATA = 00000 0000011111 11111 -K28.7 0011111000 Random jitter (RJ) measurements performed according to Fibre Channel 4.3 Annex A, Test Methods, Section A.4.4. Measure standard deviation of all 50% crossing points. ...

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THERMAL CONSIDERATIONS The Am79761 is packaged in a 14- 10-mm conventional PQFP with an internal heat spreader. These Plastic Molding Compound Lead Symbol Thermal resistance from junction to case jc Thermal resistance from case to ambient in still ...

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... Trademarks Copyright © 1998 Advanced Micro Devices, Inc. All rights reserved. AMD, the AMD logo, and combinations thereof are trademarks of Advanced Micro Devices, Inc. GigaPHY is a trademark of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. ...

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