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GD16521

Features: ` Differential CML data and clock inputs with internal 50 load termination.` Selectable on chip retiming-FF.` Output modulation current pulse duty width adjustable (Compensates for LD emission delay)` Modulation/Bias current monitor output.` Modulation/Bias current shutdown input.` Singl...

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SeekIC No. : 004352653 Detail

GD16521: Features: ` Differential CML data and clock inputs with internal 50 load termination.` Selectable on chip retiming-FF.` Output modulation current pulse duty width adjustable (Compensates for LD emis...

GD16521 Data Sheet

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Part Number:
GD16521
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Differential CML data and clock inputs with internal 50  load termination.
` Selectable on chip retiming-FF.
` Output modulation current pulse duty width adjustable
   (Compensates for LD emission delay)
` Modulation/Bias current monitor output.
` Modulation/Bias current shutdown input.
` Single supply operation: +3.3 V.
` Power dissipation: 410 mW (typ.).
` Available as:
48 lead 7 * 7 mm TQFP power enhanced plastic package
die


Application

` Tele Communication:
    SDH STM-16 modules
    SONET OC-48 modules
` Data Communication.
` Electro Absorption laser driver.
` Direct Modulation laser driver.


Pinout

Connection Diagram


Specifications

Symbol:
 Characteristic:
Conditions:
MIN.:
TYP.:
MAX.:
UNIT:
Vcc
 Power Supply
-0.5
6
V
VO
 Applied Voltage (All Outputs)
-0.5
6
V
VI
 Applied Voltage (All Inputs)
-0.5
VCC + 0.5
V
II CML IN
 Input Current
-15
15
mA
TO
 Operating Temperature
Junction
-40
+125
TS
 Storage Temperature
-65
+150
V I/O ESD
 Static Discharge (CML, LVTTL, ANL and PWR)
Note 1, 2
500
V



Description

The GD16521 is a high performance low power 2.5 Gbit/s Laser Driver with optional on chip re-timing of data.

The GD16521 is designed to meet and exceed ITU-T STM-16 and SONET OC-48 fiberoptic communication systems requirements.

The GD16521 is designed to sink a Modulation Current into the IM pin and a Pre-Bias Current into the IB pin. The Modulation Current is adjustable up to 50 mA and the Pre-Bias Current is adjustable up to 100 mA. The device features two control loops for stabilizing the laser diode operating conditions. An automatic optical power control loop maintains a constant average optical power out of the laser diode, independent of changes in the threshold current of the laser diode. A modulation current control loop maintains a constant modulation current for the laser diode, or alternatively maintains a constant extinction ratio of the laser diode.

Re-timing of the data signal connected to the pins SDIP/SDIN of GD16521 is made by means of a DFF-clocked by an external clock signal at the data rate fed to the pins SCIP/ SCIN.

The GD16521 requires a single +3.3 V supply.

The circuit of GD16521 is available as:
- 48 lead 7 × 7 mm TQFP power enhanced plastic package
- die.




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