®
EL6839
Data Sheet
July 15, 2004
FN7227.2
PRELIMINARY
Dual 4-Channel Driver with Oscillator and
LVDS
The EL6839 is a high performance,
dual output, laser driver for writeable
DVD drives. The ENA pin enables the
chip, while the SEL1 pin selects the I
OUT
pin. Various
waveforms can be generated where the amplitude is
determined by the currents flowing into I
INR
, I
IN2
, I
IN3
, and
I
IN4
. The timing is determined by the signals at WEN2-
WEN2B, WEN3-WEN3B, and WEN4-WEN4B. The oscillator
is enabled when OSEN is high. The amplified I
INR
current of
the selected channel is enabled when the ENA pin is high.
The total output current is the sum of the read current, the
enabled write currents, and the oscillator current when
enabled.
Usually a voltage DAC will drive a resistor that is in series
with the I
INR
, I
IN2
, I
IN3
, and I
IN4
input. The resistor allows
the user to optimize the current gain for each channel.
WEN2-WEN2B, WEN3-WEN3B and WEN4-WEN4B are
LVDS input pins with 100Ω external termination. Output write
current pulses are enabled when a high is applied to the
WEN2-WEN2B, WEN3-WEN3B, or WEN4-WEN4B pin. The
write current will flow to the selected output. When SEL1 is
high I
OUT1
is selected. WENRB enables read and oscillator
current when low.
The RF oscillators frequency is determined by R
FREQ1
or
R
FREQ2
, and its amplitude by R
AMP1
or R
AMP2
.
Features
• Two channels for CD or DVD
• Voltage-controlled output current source requiring one
external set resistor per channel
• LVDS interface
• Rise time = 0.8ns
• Fall time = 0.8ns
• Channel 2 to 250mA max
• Channel 3 to 150mA max
• Channel 4 to 100mA max
• External 100Ω LVDS termination
• On chip oscillator with frequency and amplitude control by
use of external resistors to ground
• Oscillator frequency to 600MHz
• Oscillator amplitude to 100mA
P-P
• Single +5V supply (±10%)
• Chip ENAs for power savings
• Pb-free available
Applications
• Super combo drives
• DVD drives
Ordering Information
PART
NUMBER
EL6839CL
EL6839CL-T7
EL6839CL-T13
EL6839CLZ
(See Note)
EL6839CLZ-T7
(See Note)
EL6839CLZ-
T13 (See Note)
TEMP. RANGE
32-Pin QFN
32-Pin QFN
32-Pin QFN
32-Pin QFN
(Pb-free)
32-Pin QFN
(Pb-free)
32-Pin QFN
(Pb-free)
PACKAGE
-
7”
13”
-
7”
13”
PKG. DWG. #
MDP0046
MDP0046
MDP0046
MDP0046
MDP0046
MDP0046
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NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL6839
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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