SLK2501 Datasheet, PDF (13/20 Pages) Texas Instruments – OC-48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER

SLK2501
OCĆ48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER
SLLS502A – OCTOBER 2001 – REVISED NOVEMBER 2001
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.
absolute maximum ratings over operating free-air temperature (unless otherwise noted)^†
Supply voltage, V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to V_DD + 0.3 V
Package power dissipation, P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Storage temperature, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
Electrostatic discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HBM: 2 kv
Characterized free-air operating temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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
PZP^‡
TA ≤25°C
POWER RATING
3.4 W
DERATING FACTOR^§
ABOVE TA = 25°C
33.78 mW/°C
PZP^¶
2.27 W
22.78 mW/°C
‡ _{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.}
TA = 85°C
POWER RATING
1.3 W
0.911 W
recommended operating conditions
PARAMETER
Supply voltage, VDD
Power dissipation, PD
Shutdown current
Operating free-air temperature, TA
TEST CONDITIONS
Frequency = 2.488 Gb/sec, PRBS pattern
Enable = 0, Vdda, Vdd pins, Vdd = max
MIN NOM MAX UNIT
2.3 2.5 2.7 V
700 900 mW
20
µA
–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.
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