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AZC199-04C Schematic ( PDF Datasheet ) - Amazing Microelectronic

Teilenummer AZC199-04C
Beschreibung Low Capacitance High ESD Level Protection Array
Hersteller Amazing Microelectronic
Logo Amazing Microelectronic Logo 




Gesamt 10 Seiten
AZC199-04C Datasheet, Funktion
www.DataSheet.co.kr
AZC199-04C
Low Capacitance High ESD Level Protection Array
For High Speed I/O Port
Features
ESD Protect for 4 high-speed I/O lines and one
VDD line
Provide ESD protection for each line to
IEC 61000-4-2 (ESD) ±15kV (air/contact)
IEC 61000-4-4 (EFT) 50A (5/50ns)
IEC 61000-4-5 (Lightning) 5A (8/20μs)
For low operating voltage applications: 5V, 4.2V,
3.3V, 2.5V etc.
Low capacitance : 1.0pF typical
Fast turn-on and Low clamping voltage
Array of ESD rated diodes with internal
equivalent TVS diode
Solid-state silicon-avalanche and active circuit
triggering technology
Back-drive protection for power-down mode
Small SOT363 package saves board space
Green part
Applications
Video Graphics Cards
Digital Visual Interface (DVI)
USB2.0 Power and Data lines protection
Notebook and PC Computers
Monitors and Flat Panel Displays
Description
AZC199-04C is a design which includes ESD
rated diode arrays to protect high speed data
interfaces. The AZC199-04C has been specifically
designed to protect sensitive components which
are connected to data and transmission lines from
over-voltage caused by Electrostatic Discharging
(ESD).
AZC199-04C is a unique design which includes
ESD rated, low capacitance steering diodes and a
unique design of clamping cell which is an
equivalent TVS diode in a single package. During
transient conditions, the steering diodes direct the
transient to either the power supply line or to
ground line. The internal unique design of
clamping cell prevents over-voltage on the power
line, protecting any downstream components.
Besides, there is a back-drive protection design in
AZC199-04C for power-down mode operation.
AZC199-04C may be used to meet the ESD
immunity requirements of IEC 61000-4-2, Level 4
(15kV air, 8kV contact discharge).
Circuit Diagram
5
Pin Configuration
I/O 4
VDD
I/O 3
654
1346
2
123
I/O 1
GND
I/O 2
SC70-6L (Top View)
(SOT-363)
Revision 2010/02/10 ©2010 Amazing Micro.
1
www.amazingIC.com
Datasheet pdf - http://www.DataSheet4U.net/






AZC199-04C Datasheet, Funktion
www.DataSheet.co.kr
AZC199-04C
Low Capacitance High ESD Level Protection Array
For High Speed I/O Port
C. Application
AZC199-04C is designed for protecting high
speed I/O ports from very high over-voltage
caused by Electrostatic Discharging (ESD). Thus,
a lot of kinds of high speed I/O ports can be the
applications of AZC199-04C, especially, the VGA
and DVI ports with the ESD spec. of
contact-15kV, Class-C above.
The VGA Output Port
Fig. 4 shows the schematic of ESD protection
design for a VGA output port on a host system,
(e.g. the source, such as MB, NB, Media
player…), where two AZC199-04C are used. The
AZC199-04C has been integrated with
back-drive protection diode for preventing the
back-drive current to occur. Thus, no extra
BAV70 for preventing the back-drive current to
occur is needed.
The back-drive current occurs as shown in
Fig, 5. When the source stays at OFF state, at
the source connector, the VGA5V pin was
wished to be at zero potential. At this moment, if
without the integrated back-drive current
protection diode, the display device stays at ON
state, and the pulled high signals will produce a
current back drive to the source’s VGA5V power
plate as shown in Fig. 5. This back drive current
may make VGA5V be not at zero potential, which
may lead system to an abnormal state. Therefore,
it should be eliminated, and the integrated
back-drive protection diode can eliminate this
current.
The VGA Input Port
In contrast with the design for a VGA output
port, the schematic of ESD protection design for
a VGA input port on a display system is shown in
Fig. 6. In most of VGA input circuit designs, there
are always two power supplies, one is from the
connector’s DSUB-5V pin which potential comes
from another VGA output port, the other is from
the own power supply circuit of the VGA input
port, system 5V. The VDD pin of AZC199-04C is
directly connected to the connector’s DSUB-5V
pin to block the ESD event which comes from the
DSUB-5V pin.
System_5V
75
Video
Filter
75
Video
Filter
75
Video
Filter
FB
FB
FB
FB
FB
VGA5V ESD Protection Design
Red
Detect VGA5V Blue
Green
654
Blue
Detect
VSYNC
HSYNC
1
Green
2
3
Red
HSYNC VGA5V VSYNC
654
DDC_Data
DDC_CLK
1
DDCA_SCL
23
DDCA_SDA
VGA5V
Red
Green
Blue
Detect
DDCA_SCL
DDCA_SDA
VSYNC
HSYNC
DIG_GND
Red_GND
Green_GND
Blue_GND
GND
15-pin
VGA connector
Fig. 4 The ESD design for a VGA OUTPUT port which two AZC199-04C are used.
Revision 2010/02/10 ©2010 Amazing Micro.
6
www.amazingIC.com
Datasheet pdf - http://www.DataSheet4U.net/

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