ISL54103 DDC Accelerator (DDCA)
bus terminator designed to improve data transmission speed
on the DDC 2-wire serial bus interfaces.
The DDCA detects rising input transitions with two internal
voltage references and two comparators per channel. After
the voltage on a data line crosses the first threshold
(VTRIPL), the boost pull-up current source is activated to
speed transition. After the voltage crosses the second
threshold (VTRIPH), the boost pull-up current source is
de-activated, leaving an active pull-up current of 275µA on
the line. When both channels are HIGH, the pull-up current
for both lines is reduced to 100µA to save power. Internal
logic ensures that the active and boost pull-up current
sources are not activated during downward transitions.
The level for VTRIPH is controlled by a bandgap voltage
referred to VDD. This feature makes the switching behavior
invariant for all power supply voltages between 2.7V and 5.5V.
A noise filter on each channel prevents the circuit from
responding to input transitions that do not exceed a
voltage-time threshold. To activate the boost circuit, the input
must exceed VTRIPL by 100Vns (typical) (See Figure 10).
The DDCA permits operation of the bus at frequencies up to
100kHz, despite the capacitive loads of multiple devices
and/or long PC board traces. Enhanced ESD protection on
the accelerator pins are guaranteed to withstand 8kV ESD
(HBM) events.
The DDC Accelerator provides an essential function in DDC
applications because of distributed capacitance of the DDC
wires in long video cables. By incorporating DDCA, systems
using DDC can reliably increase their bus load, allowing
longer cables, without the risk of data corruption.
|
[ Video Multiplexers ][ Video Cable Extenders ][ Video Distribution Amplifiers ][ Televisions ][ Computer Monitors ][ Projectors ] |
|
|
Datasheet |
|
|
ESD(HBM,>2kV) 、 ESD(HBM,>8kV) 、 IPC/JEDEC J STD-020 、 ISO9001 、 Pb-free 、 RoHS |
|
Please see the document for details |
|
|
|
|
|
|
|
|
5 Ld SOT-23 |
|
|
English Chinese Chinese and English Japanese |
|
|
October 14, 2011 |
|
|
Rev 2.00 |
|
|
FN6303 |
|
|
570 KB |
- +1 Like
- Add to Favorites
Recommend
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
