MAX3646ETG+T Maxim Integrated Products, MAX3646ETG+T Datasheet - Page 9

• Manufacturer Part Number: MAX3646ETG+T
• Description: IC LSR DRVR 622MBPS 3.63V 24TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Driver (Fiber Optic)r

Specifications of MAX3646ETG+T

• Data Rate: 622Mbps
• Number Of Channels: 1
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 47mA
• Current - Modulation: 85mA
• Current - Bias: 100mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-TQFN Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 5. Simplified Safety Circuit
Table 1. Typical Fault Conditions
1
2
3
4
If any of the I/O pins are shorted to GND or V
exceeds the programmed threshold.
End-of-life (EOL) condition of the laser diode. The bias current and/or the photocurrent exceed the programmed threshold.
Laser cathode is grounded and photocurrent exceeds the programming threshold.
No feedback for the APC loop (broken interconnection, defective monitor photodiode), and the bias current exceeds the
programmed threshold.
R
R
PC_MON
BC_MON
TX_DISABLE
Laser Driver with Extinction Ratio Control
PC_MON
BC_MON
V
_______________________________________________________________________________________
CC
I
I
BIAS
MD
82
1
POR AND COUNTER
V
V
60ms DELAY
60ms DELAY
CC
CC
COUNTER
MOD CURRENT
APC CURRENT
EXCESSIVE
EXCESSIVE
SETPOINT
SETPOINT
V
V
REF
REF
155Mbps to 622Mbps SFF/SFP
CC
(single-point failure; see Table 2), and the bias current or the photocurrent
R
S
LATCH
RS
100ns DELAY
Q
I
ENABLE
I
ENABLE
MOD
BIAS
SHUTDOWN
TX_FAULT
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