PD

ADR0

ADR1

DIS

SDA

SCK

2

1

3

4

5

6

17

18

16

15

14

13

8

7

9 10 11 12

23

24

22 21 20 19

BIAS

GND

VCC

COMP

MONB

MONP

ONET1101L

24 Lead QFN

³ RGE´

ONET1151L

24-Lead QFN

ONET1151L

SLLSEI7 – DECEMBER 2013

www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

24-Pin, RoHS-Compliant, QFN Package, 4 mm x 4 mm

With a Lead Pitch of 0,5 mm

(TOP VIEW)

Table 1. PIN DESCRIPTION

PIN

Type

Description

NAME

NO.

ADR0

2

Digital-in

Pulling the pin to VCC changes the first address bit to 1 (address = 0001001).

ADR1

3

Digital-in

Pulling the pin to VCC changes the second address bit to 1 (address = 0001010).

BIAS

18

Analog

Sinks or sources the bias current for the laser in both APC and open loop modes

COMP

15

Analog

Compensation pin used to control the bandwidth of the APC loop. Connect a 0.01-µF

capacitor to ground.

DIN+

9

Analog-in

Noninverted data input. On-chip differentially 100

Ω terminated to DIN–. Must be AC

coupled.

DIN–

10

Analog-in

Inverted data input. On-chip differentially 100

Ω terminated to DIN+. Must be AC coupled.

DIS

4

Digital-in

Disables both bias and modulation currents when set to high state. Includes a 10-k

Ω pullup

resistor to VCC. Toggle to reset a fault condition.

FLT

7

Digital-out

Fault detection flag. High level indicates that a fault has occurred. Open-drain output.

Requires an external 4.7-k

Ω to 10-kΩ pullup resistor to VCC for proper operation.

GND

8, 11, 17, EP

Supply

Circuit ground. Exposed die pad (EP) must be grounded.

MOD+

20, 21

CML-out

Noninverted modulation current output. IMOD flows into this pin when input data is high.

MOD–

22, 23

CML-out

Inverted modulation current output. IMOD flows into this pin when input data is low.

MONB

13

Analog-out

Bias current monitor. Sources a 1% replica of the bias current. Connect an external resistor

to ground (GND) to use the analog monitor (DMONB = 0). If the voltage at this pin exceeds

1.16 V, a fault is triggered. Typically choose a resistor to give MONB voltage of 0.8 V at the

maximum desired bias current. If the digital monitor function is used (DMONB = 1), the

resistor must be removed.

2

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