WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
May 4, 1995
DESCRIPTION
The WT8045 is a silicon monolithic circuit designed for synchronous signal processing and power
saving detection of multi-sync display monitors, which can cope 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.
The WT8045 incorporates many functional circuits, including horizontal/vertical frequency
discrimination, display mode selection, and synchronous pulse polarity and power saving detection,
into this single chip IC.
WT8045 is more convenient for you to shrink the PC board size and to reduce the material and labor
cost with fewer components.
FEATURES
•
•
•
•
•
•
•
Accepting two separated H&V synchronous signals with positive/ negative polarity.
Support VESA VGA (640X480, 640X400, 640X350), VESA SVGA (800X600), European
SVGA (800X600), VESA new SVGA (800X600), XGA (1024X768) and 1280x1024.
Capable of processing horizontal frequency between 25KHZ to 80KHZ.
Standard IBM video mode control outputs (1024X768, 640X480, 640X400, 640X350).
Five non-standard horizontal frequency control outputs in predefined frequency range.
Power saving mode - It can detect the conditions of monitor to decide which one will be selected
as following: ON/STANDBY/SUSPEND/OFF mode.
Fixed polarity outputs on both horizontal and vertical synchronous signals.
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
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
•
Power supply voltage: DC 5 volts; but for those pins with open-drain structure, such like the
mode select control output and frequency discrimination control output pins, can be connected to
12 volts through pull-high resistor.
APPLICATION
•
Auto size control for Multi-Sync Display Monitors
ORDERING INFORMATION
Part No.
WT8045N24P1
WT8045N24P3
WT8045N24P4
WT8045N24P5
WT8045N24P6
WT8045N24P7
WT8045N24P8
WT8045N28P1
WT8045N28P2
WT8045N28P3
WT8045N28P4
WT8045N28P5
WT8045N28P6
WT8045N28P7
WT8045N28P8
WT8045N32
Package
P-DIP 24L
P-DIP 24L
P-DIP 24L
P-DIP 24L
P-DIP 24L
P-DIP 24L
P-DIP 24L
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 28L (skinny)
P-DIP 32L
Note
V * 128
Without Mute
Without Mute
V*1
With Mute
Without Mute
With Mute
V * 128 Without Mute
V * 128 Without Mute
V * 1 Without Mute
V * 128 With Mute
V * 1 With Mute
V * 1 Without Mute
V * 128 With Mute
V * 1 With Mute
--
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
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
PIN CONFIGURATION
WT8045N24P1
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
QV128
QVRC
Vss
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768(56.5K)
WT8045N24P3
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
Vss
PM1
PM3
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
WT8045N24P4
OSCin
OSCout
HSin
VSin
Hout
Vout
F36.2K
F33K
NC
NC
VSS
PM1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768 (I)
800x600(37.5K)
NC
800x600(35.2K)
640x480(31.5K)
640x400(31.5K)
640x480
(37.5K/72Hz)
640x350
(31.5K/37.5K)
WT8045N24P5
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
QV1
QVRC
Vss
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
NC
PM3
PM2
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
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
WT8045N24P6
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
Vss
Mute
PM3
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768(56.5K)
WT8045N24P7
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
Vss
P52K
PM1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
PM3
PM2
WT8045N24P8
OSCin
WT8045N32
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VDD
1024x768(56.5K)
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
Vss
P52K
PM1+PM2
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
1024x768(56.5K)
OSCout
HSin
VSin
H_out
1024x768 (NI)
1280x1024(64K)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
PM3
PM2
PM1
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
PM3
Mute
V_out
F43.5K
F36.2K
F33K
QV128
QVRC
Vss
SELPIN
-QH
F52K
F60K
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
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
WT8045N28P1
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
QV128
QVRC
Vss
F52K
PM1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
PM3
PM2
WT8045N28P3
OSCin
OSCout
HSin
VSin
H_out
V_out
F43.5K
F36.2K
F33K
QV1
QVRC
Vss
F52K
PM1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
640x400
640x350
QH
QHRC
PM3
PM2
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
5
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