
FPD33684A/ FPD33684B
Low Power, Low EMI, TFT-LCD Column Driver with
RSDS
Inputs, 64 Grayshades, and 384 Outputs for
XGA/SXGA Applications
General Description
The FPD33684 Column Driver is a direct drive, 64 gray level,
384 output, TFT-LCD column driver with an RSDS
data
interface. It provides the capability to display 262,144 colors
(18-bit color) with a large dynamic output range for twisted
nematic applications. When used in a bank with other
FPD33684 column drivers, the FPD33684 can support both
XGA (8 drivers) or SXGA (10 drivers) applications. Output
voltages are programmably gamma corrected to provide a
direct mapping between digital video and LCD panel bright-
ness.
An RSDS
(Reduced Swing Differential Signaling) interface
is used between the timing controller and the column driver
to minimize EMI and reduce power.
The FPD33684 offers a low power, low EMI column driver
solution with direct-drive dynamic range and dot-inversion
addressing.
Features
n
RSDS
(Reduced Swing Differential Signaling) data
bus for low power, reduced EMI and small PCB foot
print
n
Up to 85MHz clock
n
Supports both XGA and SXGA timing
n
Supports notebook and monitor applications
n
Smart Charge Conservation for low power consumption
n
64 Gray levels per color (18-bit color)
n
Supports both Dot and N-Line inversion
n
Externally programmable gamma characteristic
n
Very low offsets for artifact-free images
n
High voltage outputs for high contrast in a large range of
display panel applications
n
Optional, high current, repair line buffers
n
Available in 2 common gamma reference curves
Ordering Information
Part Number
FPD33684
Gamma Curve
A or B
Custom TCP
#
XX(Note 1)
Package Suffix
CT
Note 1:
Custom TCP
#
is assigned by National Semiconductor for each custom TCP design
System Diagram
DS200113-1
May 2002
F
3
2002 National Semiconductor Corporation
DS200113
www.national.com