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S E M I C O N D U C T O R , I N C .
1
PRELIMINARY DATA SHEET
Rev 0.0.A
T
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The TQ8218/TQ8219 is a low jitter, high performance
optoelectronic driver intended for interfacing LVPECL or CML
outputs from a multiplexer or clock recovery device to various O/E
devices, including uncooled DFB lasers, high power VCSEL
arrays, EA modulators and Mach-Zender modulators. The devices’
symmetry and level controls, low additive jitter, and excellent rise/
fall times while driving significant loads allow the highest system
level performance at low cost. The small footprint makes the
devices particularly suitable for high port count WDM applications.
TQ8218/19
OC48/STM16
O/E Driver
Features
High performance fully back-
terminated 80mA/4V output
driver(TQ8218)
Also available without back-
terminations for 25
applications (TQ8219)
Output can drive 50
external
optical modulator, 50
transmission line, or directly
modulated laser from LVPECL
input
NRZ data rates to 3.125Gbs
Output symmetry adjust
LVPECL input
65-130pS rise/fall time
28 pin TSSOP small outline
package
+3.3, -5V power supply
–
40 to +100
°
C case operating
temperature range
Applications
VCSEL driver
Driving uncooled DFB lasers
Single-ended 50
4.0V
electro-absorptive modulator
driver
8V differential 50
Mach-Zender
driver
VSYMX
VLEVEL
GND
N.C.
N.C.
GND
DIN
NDIN
GND
VTT
VDD
GND
VSEN10
VSEN1
VEE
VEE
GND
N.C.
VDRIVE**
VDRIVE**
NDOUT
DOUT
VDRIVE**
VDRIVE**
VEE
VEE
N.C.
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
* Downset paddle is GND
** N.C. ON TQ8219
*
50
5
50
50
-5V
50
50
-5V