3.0V to 5.5V, 1.25Gbps/2.5Gbps

LAN Laser Drivers

6

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Pin Description (continued)

PIN

QFN/

THIN QFN

MAX3286

MAX3296

TQFP

MAX3286

MAX3296

TSSOP-EP

MAX3287

MAX3297

MAX3289

MAX3299

TSSOP-EP

MAX3288

MAX3298

NAME

FUNCTION

8922

FLTDLY

Fault Delay Input. Determines the delay of

the FAULT and

FAULT outputs. A capacitor

attached to FLTDLY ensures proper startup

(see the Typical Operating Characteristics) .

FLTDLY = GND: holds FAULT low and

FAULT high. When FLTDLY = GND, EN =

high,

operational range, the safety circuitry is

inactive.

910

—

—

LV

Low-Voltage Operation. Connect to GND for

4.5V to 5.5V operation. Leave open for 3.0V

to 5.5V operation (Table 2).

10, 22, 23,

26

11, 25, 26,

29

3, 11, 14

3, 11, 14

Supply Voltage

11

12

4

4

IN+

Noninverting Data Input

12

13

5

5

IN-

Inverting Data Input

14

15

7

7

REF

Reference Voltage. A resistor connected at

REF to MD determines the laser power when

APC is used with common-cathode lasers.

15

17

—

—

POL

Polarity Input. POL is used for programming

the laser-pinning polarity (Table 4).

16

18

—

—

POL

Inverting Polarity Input.

POL is used for

programming the laser-pinning polarity

(Table 4).

17

20

8

8

MD

Monitor Diode Connection. MD is used for

automatic power control.

18

21

—

9

MON

Laser Bias Current Monitor. Used for

programming laser bias current in VCSEL

applications.

20

23

9

—

SHDNDRV

Shutdown Driver Output. Provides a

redundant laser shutdown.

21

24

10

10

BIASDRV

Bias-Controlling Transistor Driver. Connects

to the base of an external PNP or NPN

transistor.