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Электронный компонент: WT8043N24

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WT8043
Synchronous Signal discriminator
for Multi-Sync Display Monitor
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
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
WT8043
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
2
Ordering Information
Part No.
WT8043N16 WT8043N20P1 WT8043N20P4 WT8043N20P7 WT8043N20P8 WT8043N24
Package
P-DIP 16L
P-DIP 20L
P-DIP 20L
P-DIP 20L
P-DIP 20L
P-DIP 24L
(skinny type)
Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
OSCin
HSin
OSCout
VSin
H_out
V_out
VDD
WT8043N20P1
F45K
F36K
Vss
640x400
640x480
800x600(48K)
17
18
19
20
800x600(37.5K)
800x600(35K)
1024x768(57K)
1024x768 (I)
F52K
640x350
1024x768 (NI)
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
OSCin
HSin
OSCout
VSin
H_out
V_out
VDD
WT8043N20P4
F45K
F36K
Vss
F33K
640x400
640x480
800x600(48K)
17
18
19
20
800x600(37.5K)
800x600(35K)
1024x768(57K)
1024x768 (I)
640x350
1024x768 (NI)
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
OSCin
HSin
OSCout
VSin
H_out
V_out
VDD
WT8043N20P7
F45K
F36K
Vss
F52K
640x400
640x480
800x600(48K)
17
18
19
20
800x600(37.5K)
800x600(35K)
1024x768(57K)
1024x768 (I)
NEC
1024x768 (NI)
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
OSCin
HSin
OSCout
VSin
H_out
V_out
VDD
WT8043N20P8
F45K
F36K
Vss
F33K
640x400
640x480
800x600(48K)
17
18
19
20
800x600(46.8K,75)
800x600(37.5K)
1024x768(60K,75)
1024x768(I)
640x350
1024x768(57K)
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
OSCin
HSin
OSCout
VSin
H_out
V_out
VDD
WT8043N16
F36K
Vss
F33K
640x400
640x480
800x600(37.5K)
800x600(35K)
1024x768 (I)
640x350
13
WT8043
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
2
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
OSCin
HSin
OSCout
VSin
V_out
VDD
WT8043N24
1280x1024
(64k)
F60K
F45K
F36K
Vss
F33K
F72K
640x400
640x480
800x600(48K)
17
18
19
20
21
22
23
24
800x600(37.5K)
800x600(35K)
1024x768(57K)
1024x768 (I)
F52K
640x350
1024x768 (NI)
13
H_out
WT8043
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
3
Absolute Maximum Ratings
Item
Symbol
Value
Unit
Digital Supply Voltage
V
DD
5.5
V
Horizontal Sync. Input Voltage
V
HS
V
DD
(5)+0.3
V
Vertical Sync. Input Voltage
V
VS
V
DD
(5)+0.3
V
Power Dissipation
P
D
300
mW
Operating Temperature Range
T
OPT
0~70
C
Storage Temperature Range
T
STG
-40~125
C
Recommended Operating Conditions
Item
Symbol
Min.
Typ.
Max.
Unit
Digital Supply Voltage
V
DD
(5)
4.5
5
5.5
V
Supply Current (Oscillator on)
I
P
mA
Synchronous Input Voltage
Low
V
IL
0.8
V
Synchronous Input Voltage
High
V
IH
2.4
4
5.0
V
Horizontal Synchronous
Frequency Range
F
H
25
-
80
KHz
Vertical Synchronous
Frequency Range
F
V
50
-
120
Hz
Crystal Clock Frequency
F
CLK
3.5764
3.58
3.5836
MHz
Open Drain Pull High Voltage
V
OH
8
12
V
WT8043
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
Electrical Characteristics
(V
DD
=5V, T
OPT
=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 I
OL
= 4mA
V
OL1
0.4
V
Output High (H-out, V-out)
When I
OH
= -400
A
V
OH1
2.4
V
Open Collector Output Low
When I
OL
= 6mA
V
OL2
0.4
V
Output Sink Current (H-out,
V-out) When V
OL1
= 0.4V
I
OL1
4
mA
Output Drive Current (H-out,
V-out) When V
OH1
= 2.4V
I
OH1
400
A
Open Drain Sink Current
When V
OL2
= 0.4V
I
OL2
6
mA
Input H_SYNC Pulse Width
W
H_SYNC
0.56
4
S
Input V_SYNC Pulse Width
W
V_SYNC
0.56
833
S
H_SYNC, Output Pulse delay,
respect to Hsin
T
DHS
60
nS
V_SYNC, Output Pulse delay,
respect to Vsin
T
VHS
60
nS
Upper Trigger Input Point
(H_IN, V_IN)
V
UTP
2.0
V
Lower Trigger Input Point
(H_IN, V_IN)
V
LTP
0.8
V
Noise Margin (H_IN, V_IN)
V
NM
1.75
V