M02069-12

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8

3.3 or 5 Volt VCSEL/FP Laser Driver IC for Applications to 4.3 Gbps

Rev V2

DIS negate (turn-on) time during burst-

mode operation

Using integrated switch at SVCC (3.3V operation)

(4)

300

500

ns

DIS assert (turn-off) time during burst-

mode operation

Using integrated switch at SVCC (3.3V

200

500

ns

Notes:

1. With CAPC = 2.2nF

2. User-adjustable. Specifications reflect timing with no external RESET capacitor.

3. With < 1nF capacitor from RESET pin to ground.

4. Imod > 12mA

Figure 1-1.

Safety Logic Timing Characteristics

Table 1-5.

Safety Logic Timing

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units.

Hot Plug (DIS Low)

V

CC3

and

V

CC5

status

FAIL

DIS

LASER

OUTPUT

(low)

(low)

V

“OK”

t_on < 1ms,

(300 us typ.)

Slow Rise on Vcc=3.3V at Power-up (DIS Low)

V

CC3

FAIL

DIS

LASER

OUTPUT

(low)

(low)

3.3V

t_on < 1ms,

(300 us typ.)

V

CC

3.3V

FAIL state at power-up will

depend on pull-up voltage