M02066_17 Datasheet, PDF (7/20 Pages) M/A-COM Technology Solutions, Inc. – 3.3 Volt Laser Driver IC for Applications to 3 Gbps

Pin Description
Table 2-1. Pin Descriptions (BCC+24) (Continued)
Pin No.
Name
Function
22
D_IN
Negative data input (PECL). Self biased
23
CLK
Positive clock input (PECL). Self biased. Connect to V_cc if not used
24
CLK
Negative clock input (PECL). Self biased. Can be disconnected if not used
NOTE:
The center pad must be connected to ground through an array of vias for good electrical and thermal performance.
Table 2-2. Pin Descriptions (TQFP 32)
Pin No.
Name
Function
1, 4, 7, 16,
18, 21, 25,
32
2
3
5
6
8
9
10
11
12
13
14
15
17
19
20
22
23
24
26
V_CC Power supply
D_IN
D_IN
CLK
CLK
CEN
ENA
GND
BIAS_MON
MOD_MON
FAIL
OCA
GND
BIAS
OUT+
OUT-
GND_A
GND_A
PD
C_MPC
Positive data input (PECL). Self biased
Negative data input (PECL). Self biased
Positive clock input (PECL). Self biased. Connect to V_cc if not used
Negative clock input (PECL). Self biased. Can be disconnected if not used
Clock enable input (TTL/CMOS). Set HIGH or not connected to use CLK inputs, LOW when not using CLK
inputs
Bias and modulation output enable (TTL/CMOS). HIGH for normal operation
Ground
Bias monitor and temperature- dependent bias current limit. Connect a resistor between this pin and V_CC to
monitor
Modulation current monitor. Connect a resistor between this pin and V_CC to monitor
Mean power control failure indicator (TTL/CMOS). Goes LOW when control loop is no longer able to maintain
constant current at I_PIN
Over-current alarm (TTL/CMOS). Goes LOW when I_BIAS exceeds the preset bias current limit
Ground
Laser bias current output
Positive modulation current output. Sinks current when D_IN is HIGH
Negative modulation current output. Sinks current when D_IN is HIGH
Ground for output stage (inductor to ground)
Ground for output stage (inductor to ground)
Monitor photo diode input. This input is connected to the monitor photodiode anode for automatic power
control.
Mean power control dominant pole capacitor
02066-DSH-001-D
Mindspeed Technologies^®
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Preliminary Information / Mindspeed Proprietary and Confidential