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DESCRIPTION

TLK2218

SLLS734 – FEBRUARY 2007

8-PORT GIGABIT ETHERNET TRANSCEIVER

• Internal Series Termination on LVCMOS

Outputs to Drive 50-

Ω Lines

• Eight 1.0- to 1.3-Gigabits Per Second (Gbps)

Synchronizable Transceivers

• Source Centered Timing on Parallel Inputs

and Outputs

• Haft-Rate Operation (0.5 to 0.65 Gbps)

• Comprehensive Suite of Built-In Testability

• Low Power Consumption <1.3 W Typical at

Features (PRBS Generation and Verification,

1.25 Gbps

Serial Loopback, and Far-End Loopback)

• IEEE 802.3z Gigabit Ethernet Compliant

• IEEE 802.3 Clause 22 Management Data

• Differential VML Transmit Outputs With No

Interface (MDIO) Support

External Components Necessary. PECL

• IEEE 1149.1 JTAG Support

Compatible Levels

• Hot-Plug Protection on Serial I/O

• Programmable High-Speed Output

Preemphasis Levels

• No External Filter Components Required for

PLLs

• Selectable Parallel Interface Modes:

• Small Footprint 19×19-mm, 289-Terminal,

–

Nibble-Wide Double Data Rate (DDR)

1,0-mm Ball-Pitch BGA

Clocking Interface

• Advanced Low-Power 0.18-µm CMOS

–

Multiplexed Channel DDR Clock Interface

Technology

• Selectable Clock Tolerance Compensation

• Commercial Temperature Rating (0°C to 70°C)

• Selectable On-Chip 8b/10b IEEE 802.3z

Compliant Encoder and Decoder

• JEDEC-Compliant 1.8-V LVCMOS (Extendable

• Point-to-Point Baseband Data Transmission

to 2.5 V)

• 3.6-V Tolerant Inputs on Parallel I/O

The TLK2218 is the third generation of Gigabit Ethernet transceivers from Texas Instruments combining high

port density and ultra-low power in a small form-factor footprint. The TLK2218 provides for high-speed

full-duplex point-to-point data transmissions based on the IEEE 802.3z 1000-Mbps Ethernet specification. The

TLK2218 supports data rates from 1.0 Gbps through 1.3 Gbps in full rate mode, or 0.5 Gbps through 0.65 GbPs

in half rate mode.

The primary application of this device is to provide building blocks for developing point-to-point baseband data

transmission over controlled impedance media of 50

Ω. The transmission media can be printed circuit board

traces, copper cables or fiber-optical interface modules. The ultimate rate and distance of data transfer is

dependent upon the attenuation characteristics of the media and the noise coupling to the environment.

The TLK2218 performs the data encoding, decoding, serialization, deserialization, clock extraction and clock

tolerance compensation functions for a physical layer interface device. Each channel operates at up to 1.3Gbps

providing up to 8.32Gbps of aggregate data bandwidth over copper or optical-media interfaces.

The TLK2218 supports two selectable reduced-pin-count double-data-rate (DDR) timing interfaces, nibble mode

and multiplexed channel mode, to a protocol device.

In the nibble interface mode, the parallel interface accepts nibble-wide unencoded or 8b/10b encoded data

aligned to both the rising and falling edges of the transmit clock.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.