
________________General Description
The MAX3263 is a complete, easy-to-program, single
+5V-powered, 155Mbps laser diode driver with com-
plementary enable inputs and automatic power control
(APC). The MAX3263 accepts differential PECL inputs
and provides complementary output currents. A tem-
perature-stabilized reference voltage is provided to
simplify laser current programming. This allows modu-
lation current to be programmed up to 30mA and bias
current to be programmed from up to 60mA with two
external resistors.
An APC circuit is provided to maintain constant laser
power in transmitters that use a monitor photodiode.
Only two external resistors are required to implement
the APC function.
The MAX3263’s fully integrated feature set includes a
TTL-compatible laser failure indicator and a program-
mable slow-start circuit to prevent laser damage. The
slow-start is preset to 50ns and can be extended by
adding an external capacitor.
________________________Applications
Laser Diode Transmitters
155Mbps SDH/SONET
155Mbps ATM
____________________________Features
o
Rise Times Less than 1ns
o
Differential PECL Inputs
o
Single +5V Supply
o
Automatic Power Control
o
Temperature-Compensated Reference Voltage
o
Complementary Enable Inputs
_______________Ordering Information
M
Single +5V, Fully Integrated,
155Mbps Laser Diode Driver
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
SLWSTRT
IPIN
VCCA
GNDA
OUT+
GNDA
OUT-
GNDA
IBIASOUT
IMODSET
IBIASSET
IBIASFB
VREF2
IPINSET
FAILOUT
GNDB
VIN+
VIN-
GNDB
VCCB
ENB-
ENB+
VREF1
OSADJ
TOP VIEW
16
15
14
13
9
10
11
12
SSOP
MAX3263
___________________Pin Configuration
19-0432; Rev 1b; 4/98
PART
MAX3263CAG
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
24 SSOP
MAX3263
+5V
0.01
μ
F
0.01
μ
F
+5V
+5V
+5V
OUT+
IBIASOUT
IPIN
PECL
INPUTS
OUT-
FAILOUT
IBIASFB
OSADJ
IMODSET
IPINSET
IBIASSET
VCCA VCCB
VIN+
VIN-
ENB+
GNDB
GNDA
ENB-
SLWSTRT
VREF1
VREF2
LASER
2.7k
PHOTO-
DIODE
FERRITE BEAD
_____________Typical Operating Circuit