pacvga203 California Micro Devices Corporation, pacvga203 Datasheet

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pacvga203

Manufacturer Part Number
pacvga203
Description
Vga Port Companion Circuit
Manufacturer
California Micro Devices Corporation
Datasheet
Features
Applications
© 2004 California Micro Devices Corp. All rights reserved.
12/07/04
Simplified Electrical Schematic
VIDEO_1
VIDEO_2
75Ω termination resistors for VIDEO lines
VIDEO_3
TERM_1
TERM_2
TERM_3
Single-chip solution for the VGA port interface
Includes ESD protection, level shifting, and RGB
termination
Seven channels of ESD protection for all VGA port
connector pins, meeting IEC-61000-4-2 Level-4
ESD requirements (8kV contact discharge)
Very low loading capacitance from ESD protection
diodes on VIDEO lines; 4pF typical
(matched to 1% typ.)
TTL to CMOS level-translating buffers with power-
down mode for HSYNC and VSYNC lines
Bi-directional level shifting N-channel FETs pro-
vided for DDC_CLK & DDC_DATA channels
Compact 24-pin QSOP package
Lead-free version available
Notebook computers with VGA port
Desktop PCs with VGA port
GNDA
GNDD
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
8
9
10
7
3
4
5
6
75
75
75
V
2
CC
GNDA
GNDD
1
DDC_IN1
DDC_IN2
GNDD
GNDD
VGA Port Companion Circuit
16
17
R
R
C
C
12
GNDD
GNDD
V
V
CC
CC
2
2
14
GNDD
GNDD
V
V
CC
CC
G
3
3
15
18
Tel: 408.263.3214
DDC_OUT1
DDC_OUT2
Product Description
The PACVGA203 incorporates seven channels of ESD
protection for all signal lines commonly found in a VGA
port.
steering diodes designed to safely handle the high
surge currents encountered with IEC-61000-4-2 Level-
4 ESD Protection (8kV contact discharge). When a
channel is subjected to an electrostatic discharge, the
ESD current pulse is diverted via the protection diodes
into either the positive supply rail or ground where it
may be safely dissipated. Separate positive supply
rails are provided for the VIDEO, DDC and SYNC
channels to facilitate interfacing with low voltage Video
Controller ICs and provide design flexibility in multi-
supply-voltage environments.
Two non-inverting drivers provide buffering for the
HSYNC and VSYNC signals from the Video Controller
IC (SYNC_IN1, SYNC_IN2). These buffers accept TTL
input levels and convert them to CMOS output levels
that swing between Ground and V
page).
R
GNDD
SYNC_IN2
B
ESD protection is implemented with current
G
SYNC_IN1
V_BIAS
Fax: 408.263.7846
21
13
GNDD
V
D1
CC
19
1
4
GNDD
V
CC
1
4
GNDD
GNDD
G
GNDD
R
PACVGA203
C
www.calmicro.com
CC
R
R
S
S
23
22
20
11
24
4 (cont’d next
SYNC_OUT1
SYNC_OUT2
SD1
PWR_UP
SD2
1

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pacvga203 Summary of contents

Page 1

... California Micro Devices Corp. All rights reserved. 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 12/07/04 VGA Port Companion Circuit Product Description The PACVGA203 incorporates seven channels of ESD protection for all signal lines commonly found in a VGA port. ESD protection is implemented with current steering diodes designed to safely handle the high surge currents encountered with IEC-61000-4-2 Level- 4 ESD Protection (8kV contact discharge) ...

Page 2

... V_BIAS. In applications where powered down, diode D1 blocks any DC current paths from the DDC_OUT pins back to the powered down V CC The PACVGA203 device is housed in a 24-pin QSOP package and is available with optional lead-free finish- ing. PACKAGE / PINOUT DIAGRAM Top View 1 ...

Page 3

... Vertical Sync signal). Sync Signal Filter 2. Connects to the video connector side of one of the sync lines (for example the Horizontal Sync signal). Tel: 408.263.3214 G PACVGA203 pin for the SYNC_1, SYNC_2, SD1 CC pin for the VIDEO_1, VIDEO_2 and CC pin for the DDC_IN1 and DDC_IN2 ...

Page 4

... PWR-UP pin SYNC outputs CC unloaded 5.0V; SYNC inputs at 3.0V; PWR-UP CC pin SYNC outputs unloaded 5.0V; PWR-UP input at GND; SYNC CC outputs unloaded Tel: 408.263.3214 G PACVGA203 RATING [GND - 0.5] to +6.0 100 -40 to +85 -65 to +150 (GND - 0. 0.5) CC -6.0, +6.0 (GND - 0. 0.5) CC (GND - 0. 0.5) CC (GND - 0 ...

Page 5

... 50pF; V =5.0V,Input t and 50pF; V =5.0V; Input t and 50pF; V =5.0V; Input t and (measured 10 5V; Notes 3 & Tel: 408.263.3214 G G PACVGA203 (CONT’D) MIN TYP MAX 2.0 0.8 4.94 0. 0.5 1.0 2.0 0.5 1.5 3 0.15 3.0 4.0 5.0 3.0 4.5 5.6 < 5ns 8 ...

Page 6

... SYNC_IN signal frequency varies. A square wave CC Figure SYNC_IN 3.3V 0V Figure 1. Sync Buffer I 4 Test Circuit CC I vs. SYNC_IN Frequency CC4 Frequency, kHz 4 vs. SYNC_IN Frequency Performance Data CC Tel: 408.263.3214 G PACVGA203 + SYNC_OUT C1 100pF 50pF 0pF 80 100 Fax: 408.263.7846 www.calmicro.com G G ...

Page 7

... A resistor may be necessary between the V required while the PACVGA203 is in the power-down state. The value of this resistor should be chosen such that the extra charge deposited into the V ESD pulse occurs. The maximum ESD repetition rate specified by the IEC-61000-4-2 standard is one pulse per second ...

Page 8

... Mechanical Details QSOP Mechanical Specifications: PACVGA203 devices are packaged in 24-pin QSOP packages. Dimensions are presented below. For complete information on the QSOP-24 package, see the California Micro Devices QSOP Package Infor- mation document. PACKAGE DIMENSIONS Package QSOP (JEDEC name is SSOP) Pins Millimeters ...

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