FOA2322A Datasheet, PDF (25/37 Pages) Infineon Technologies AG – 3.2 Gbi t /s Laser Driver IC for Telecom and Datacom Applications

FOA2322A
Electrical Characteristics
Bias current is disabled by setting Bias Enable low, modulation current is disabled by
setting Modulation Enable low.
LEN do not effect LF. This means LF can not be reset by LEN.
2.9
Input Signal Monitoring and Hardware Alarm
(Consideration in absence of Laser Fault)
Table 5
Function of ISM Circuit and Hardware Alarm Indicator (HWA)
Data Level
(after delay
of ISM)
V_CC < Reset
Threshold of V_CC
/Circuit in Reset
state
ISM Laser LDOFF HWA (low Modulation Bias
Enable¹⁾
active)
Enable¹⁾
Enable¹⁾
Constant High No
0
1
0
0
0
Constant Low No
0
1
0
0
0
Constant High Yes
0
1
0
0
0
Constant Low Yes
0
1
0
0
0
Duty Cycle ok Yes
Duty Cycle ok No
1
1
0
0
0
1
0²⁾
1
1
1
1) _{Internal signal}
2) _{Sink current enabled = Low}
Preliminary Data Sheet
21
2001-05