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DESCRIPTION (CONTINUED)

TLK2218

SLLS734 – FEBRUARY 2007

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

In the multiplexed channel mode, the parallel interface accepts 8-bit-wide unencoded or 10-bit-wide 8b/10b

encoded data with channels A, C, E, and G aligned to the falling edge of the source synchronous transmit clock

and channels B, D, F, and H aligned to the rising edge of the transmit clock. The receive path interface is done

in the same manner.

The TLK2218 aligns the recovered data clock frequency to the reference clock on each channel by means of a

clock tolerance compensation circuit and internal FIFO that inserts or drops 20-bit IDLE codes as needed in the

interpacket gap (IPG). In synchronous mode, the received data for all channels is aligned to a single receive

data clock that is a buffered version of the reference clock.

The TLK2218 supports a selectable IEEE 802.3z compliant 8b/10b encoder/decoder in all its modes of

operation.

The TLK2218 automatically locks onto incoming data without the need to pre-lock.

The TLK2218 provides a comprehensive series of built-in tests for self-test purposes including loopback and

PRBS generation and verification. An IEEE 1149.1 JTAG port is also supported to aid in board-manufacturing

testing.

The TLK2218 is housed in a small form-factor 19

×19-mm, 289-terminal BGA with 1,0-mm ball pitch.

The TLK2218 is characterized to support the commercial temperature range of 0

°C to 70°C.

The TLK2218 consumes 1.3 W when operating at nominal conditions.

The TLK2218 is designed to be hot-plug capable. A power-on reset puts the serial side output signal terminals

TX+/TX– in the high-impedance state during power up.

ORDERING INFORMATION

289-BGA (ZPV)

0

°C to 70°C

TLK2218ZPV

(1)

For the most current package and ordering information, see the

Package Option Addendum at the end of this document, or see the

TI Web site at www.ti.com.

2

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