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Número de pieza | WT8043N20P1 | |
Descripción | Synchronous Signal discriminator for Multi-Sync Display Monitor | |
Fabricantes | ETC | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de WT8043N20P1 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
No Preview Available ! WT8043
Synchronous Signal discriminator
for Multi-Sync Display Monitor
Jan. 30, 1996
Description
The WT8043 is a silicon monolithic circuit designed for synchronous signal
processing of multi-sync display monitors capable of coping with many kinds of PC's
and workstations. It can be applied to display monitors supporting standard IBM
VGA, VESA super VGA and IBM 8514/A video modes. It can also be used in other
high-end display monitors supporting non-standard video modes with user-defined
horizontal/vertical frequency ranges.
WT8043 incorporates many functional circuits, horizontal/vertical frequency
discrimination, display mode selection, and synchronous pulse polarity detection, into
a single chip. Therefore, by using WT8043, monitor makers can shrink the PC board
size, reduce the material cost with fewer components, and reduce labor cost as well.
Features
• Accepting separate H&V Synchronous signals with any polarities
• Support VESA VGA (640x480, 640x400, 640x350), VESA SVGA (800x600),
European SVGA (800x600), VESA new SVGA (800x600), XGA (1024x768)
and 1280x1024.
• Also including NEC (24K) mode, 3 VESA New 75Hz timing modes and Apple
MAC II (35k) mode.
• Capable of processing horizontal frequency from 25KHz to 80KHz
• Capable of processing vertical frequency from 50Hz to 120Hz
• Standard IBM video mode control outputs (1024x768, 640x480, 640x400,
640x350)
• Six non-standard horizontal frequency control outputs with predefined frequency
range. (users can define their own horizontal frequency range)
• Fixed polarity horizontal and vertical synchronous signals output
• Power supply voltage: 5V, but mode select control output and frequency
discrimination control output, these open collector outputs can be combined with
pull high resistor, pull up to 12V.
Application
• Auto size control for Multi-Sync Display Monitors
Weltrend Semiconductor, Inc.
2F., No. 24, Industry E. 9th Rd.
Science-Based Industrial Park
Hsin-Chu, Taiwan, R.O.C.
Tel: 886-35-780241
Fax: 886-35-770419
1
1 page WT8043
Electrical Characteristics
(VDD=5V, TOPT=25°C, Crystal=3.58MHz)
Item Symbol Min. Typ. Max. Unit
F33K 32.95 - 33.05 KHz
F36.2K 36.15 - 36.25 KHz
Discrimintaion of H.
F45K 44.95 - 45.05 KHz
Synchronous Frequency
F52K 51.95 - 52.05 KHz
F62K 61.95 - 62.05 KHz
F72K 71.95 - 72.05 KHz
Output Low (H-out, V-out)
When IOL = 4mA
VOL1
0.4 V
Output High (H-out, V-out)
When IOH = -400µA
VOH1
2.4
V
Open Collector Output Low
When IOL = 6mA
VOL2
0.4 V
Output Sink Current (H-out,
V-out) When VOL1= 0.4V
Output Drive Current (H-out,
V-out) When VOH1= 2.4V
IOL1
¡ ýIOH1¡ ý
4 mA
400 µA
Open Drain Sink Current
When VOL2= 0.4V
IOL2
6 mA
Input H_SYNC Pulse Width WH_SYNC 0.56
4 µS
Input V_SYNC Pulse Width WV_SYNC 0.56
833 µS
H_SYNC, Output Pulse delay, TDHS
respect to Hsin
60 nS
V_SYNC, Output Pulse delay, TVHS
respect to Vsin
60 nS
Upper Trigger Input Point
(H_IN, V_IN)
VUTP
2.0
V
Lower Trigger Input Point
(H_IN, V_IN)
VLTP
0.8 V
Noise Margin (H_IN, V_IN) VNM
1.75 V
Weltrend Semiconductor, Inc.
2F., No. 24, Industry E. 9th Rd.
Science-Based Industrial Park
Hsin-Chu, Taiwan, R.O.C.
Tel: 886-35-780241
Fax: 886-35-770419
4
5 Page WT8043
Block Diagram I
Figure 1-1 WT8043N20P1 Functional Block Diagram
Weltrend Semiconductor, Inc.
2F., No. 24, Industry E. 9th Rd.
Science-Based Industrial Park
Hsin-Chu, Taiwan, R.O.C.
Tel: 886-35-780241
Fax: 886-35-770419
10
11 Page |
Páginas | Total 20 Páginas | |
PDF Descargar | [ Datasheet WT8043N20P1.PDF ] |
Número de pieza | Descripción | Fabricantes |
WT8043N20P1 | Synchronous Signal discriminator for Multi-Sync Display Monitor | ETC |
WT8043N20P4 | Synchronous Signal discriminator for Multi-Sync Display Monitor | ETC |
WT8043N20P7 | Synchronous Signal discriminator for Multi-Sync Display Monitor | ETC |
WT8043N20P8 | Synchronous Signal discriminator for Multi-Sync Display Monitor | ETC |
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