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PDF WT8043N20P7 Data sheet ( Hoja de datos )

Número de pieza WT8043N20P7
Descripción Synchronous Signal discriminator for Multi-Sync Display Monitor
Fabricantes ETC 
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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
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WT8043N20P7 pdf
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





WT8043N20P7 arduino
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

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