Datasheet

HOT PLUG WITH TX_DISABLE LOW
MAX3740A toc19
20ms/div
TX_DISABLE
V
CC
LASER
OUTPUT
FAULT
LOW
t_INIT = 60ms
3.3V
LOW
OV
MAX3740A
3.2Gbps SFP VCSEL Driver with Diagnostic
Monitors
_______________________________________________________________________________________ 7
STARTUP WITH SLOW RAMPING SUPPLY
MAX3740A toc20
20ms/div
TX_DISABLE
V
CC
LASER
OUTPUT
FAULT
LOW
t_INIT = 62ms
3.3V
LOW
OV
TX_DISABLE NEGATE TIME
MAX3740A toc21
20μs/div
TX_DISABLE
V
CC
LASER
OUTPUT
FAULT
HIGH
t_ON = 54μs
3.3V
LOW
LOW
TRANSMITTER DISABLE
MAX3740A toc22
1μs/div
TX_DISABLE
V
CC
LASER
OUTPUT
FAULT
LOW
t_OFF = 1.86μs
3.3V
LOW
HIGH
RESPONSE TO FAULT
MAX3740A toc23
200ns/div
TX_DISABLE
V
PWRMON
LASER
OUTPUT
FAULT
LOW
t_FAULT = 245ns
LOW
HIGH
EXTERNALLY
FORCED
FAULT
FAULT RECOVERY TIME
MAX3740A toc24
40μs/div
TX_DISABLE
V
PWRMON
LASER
OUTPUT
FAULT
LOW
t_INIT = 54μs
HIGH
EXTERNAL
FAULT
REMOVED
LOW
LOW
HIGH
FREQUENT ASSERTION OF TX_DISABLE
MAX3740A toc25
200μs/div
TX_DISABLE
V
PWRMON
LASER
OUTPUT
FAULT
EXTERNALLY
FORCED FAULT
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, R
TC
= 0Ω, PEAKSET open, measured electrically with a 50Ω load AC-coupled to OUT+, T
A
= +25°C, unless otherwise
noted.)