SLK2501

OC48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER

SLLS502A – OCTOBER 2001 – REVISED NOVEMBER 2001

13

POST OFFICE BOX 655303

detailed description (continued)

power-on reset

Upon application of minimum valid power, the SLK2501 generates a power-on reset. During the power-on reset

the PRXDATA[0:3] signal pins goes to 3-state. RXCLKP and RXCLKN are held low. The length of the power-on

reset cycle is dependent upon the REFCLKP and REFCLKN frequency but is less than 1-ms in duration.

–0.3 to 3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range: TTL input terminals

–0.3 to 4 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LVDS terminals

–0.3 to 3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Any other terminal except above

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

See Dissipation Rating Table

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrostatic discharge

HBM: 2 kv

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1.6 mm (1/16 inch) from case for 10 seconds

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

DISSIPATION RATING TABLE

PACKAGE

TA ≤25°C

POWER RATING

DERATING FACTOR§

ABOVE TA = 25°C

TA = 85°C

POWER RATING

PZP‡

3.4 W

33.78 mW/

°C

1.3 W

PZP¶

2.27 W

22.78 mW/

°C

0.911 W

‡ 2 oz trace and copper pad with solder.

§ This is the inverse of the traditional junction-to-ambient thermal resistance (RθJA).

¶ 2 oz trace and copper pad without solder.

recommended operating conditions

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

Supply voltage, VDD

2.3

2.5

2.7

V

Power dissipation, PD

Frequency = 2.488 Gb/sec,

PRBS pattern

700

900

mW

Shutdown current

Enable = 0,

Vdda, Vdd pins,

Vdd = max

20

µA

Operating free-air temperature, TA

–40

85

°C

start up sequence

To ensure proper start up, follow one of the following steps when powering up the SLK2501.

1.

Keep ENABLE (pin 44) low until power supplies and reference clock have become stable.

2.

Drive ENABLE (pin 44) low for at least 30 ns after power supplies and reference clock have become stable.

The following step is recommended with either of the above two sequences.

3.

Drive RESET low for at least 10 ns after link has become stable to center the TXFIFO.