WT8045N28P8 [ETC]
Synchronous Signal Discriminator and Power Saving Detector for Green Monitor; 同步信号鉴别和节能检测的绿色显示器
| 型号： | WT8045N28P8 |
| 厂家： | 
ETC |
| 描述： | Synchronous Signal Discriminator and Power Saving Detector for Green Monitor |
| 文件： | 总25页 (文件大小：446K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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.
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
·
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.
Package
Note
WT8045N24P1
WT8045N24P3
WT8045N24P4
WT8045N24P5
WT8045N24P6
WT8045N24P7
WT8045N24P8
WT8045N28P1
WT8045N28P2
WT8045N28P3
WT8045N28P4
WT8045N28P5
WT8045N28P6
WT8045N28P7
WT8045N28P8
WT8045N32
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
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
--
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
PIN CONFIGURATION
WT8045N24P3
WT8045N24P1
24
23
22
21
20
19
18
OSCin
1
VDD
24
23
22
21
20
19
18
1
OSCin
VDD
OSCout
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
2
3
OSCout
1024x768(56.5K)
2
3
4
5
6
HSin
VSin
HSin
VSin
1024x768 (NI)
1024x768 (I)
800x600(48K)
4
5
6
7
8
H_out
V_out
F43.5K
F36.2K
F33K
H_out
V_out
800x600(37.5K)
800x600(35.2K)
640x480
F43.5K
F36.2K
F33K
7
8
17
16
17
16
9
9
640x400
640x400
15
14
13
15
14
13
Vss
QV128
QVRC
10
11
12
10
11
12
640x350
QH
640x350
QH
PM1
QHRC
QHRC
PM3
Vss
WT8045N24P4
WT8045N24P5
24
23
22
21
20
19
18
1
OSCin
VDD
24
23
22
21
20
19
18
1
OSCin
VDD
OSCout
1024x768 (I)
800x600(37.5K)
NC
2
3
4
5
6
OSCout
1024x768(56.5K)
2
3
4
5
6
HSin
VSin
Hout
Vout
HSin
VSin
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
800x600(35.2K)
640x480(31.5K)
640x400(31.5K)
H_out
V_out
F36.2K
F33K
NC
7
8
F43.5K
F36.2K
F33K
7
8
640x480
(37.5K/72Hz)
17
16
17
16
640x350
(31.5K/37.5K)
9
9
640x400
15
14
13
15
14
13
NC
QV1
NC
10
11
12
10
11
12
640x350
QH
PM3
PM2
QVRC
VSS
PM1
QHRC
Vss
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
WT8045N24P6
WT8045N24P7
24
23
22
21
20
19
18
24
23
22
21
20
19
18
OSCin
1
OSCin
1
VDD
VDD
OSCout
OSCout
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
2
3
2
3
HSin
VSin
HSin
VSin
4
5
6
7
8
4
5
6
7
8
H_out
V_out
F43.5K
F36.2K
F33K
H_out
V_out
F43.5K
F36.2K
F33K
17
16
17
16
9
9
640x400
640x400
15
14
13
15
14
13
Vss
Vss
10
11
12
10
11
12
640x350
QH
640x350
PM3
Mute
P52K
QHRC
PM2
PM3
PM1
WT8045N32
WT8045N24P8
32
31
OSCin
1
VDD
24
23
22
21
20
19
18
OSCin
1
VDD
OSCout
1024x768(56.5K)
2
3
4
5
6
OSCout
1024x768(56.5K)
1024x768 (NI)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
HSin
VSin
2
3
30
29
1024x768 (NI)
1280x1024(64K)
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
HSin
VSin
H_out
V_out
28
27
26
4
5
6
7
8
H_out
V_out
F43.5K
F36.2K
F33K
F43.5K
F36.2K
7
8
25
24
23
F33K
9
QV128
QVRC
10
11
12
13
14
15
16
640x400
17
16
22
21
640x350
QH
9
640x400
Vss
SELPIN
QHRC
PM3
PM2
PM1
20
19
18
15
14
13
Vss
10
11
12
640x350
PM3
-QH
P52K
F52K
F60K
PM1+PM2
Mute
17
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
WT8045N28P1
VDD
1
OSCin
28
27
26
OSCout
1024x768(56.5K)
2
3
4
5
6
HSin
VSin
1024x768 (NI)
25
24
23
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
H_out
V_out
F43.5K
F36.2K
7
8
22
21
F33K
9
20
19
18
640x400
10
11
12
13
14
QV128
QVRC
640x350
QH
17
16
15
QHRC
PM3
Vss
F52K
PM1
PM2
WT8045N28P3
VDD
1
OSCin
28
OSCout
1024x768(56.5K)
27
26
25
24
23
2
3
4
5
6
HSin
VSin
1024x768 (NI)
1024x768 (I)
800x600(48K)
H_out
V_out
800x600(37.5K)
800x600(35.2K)
640x480
F43.5K
F36.2K
7
8
22
21
F33K
9
20
19
18
640x400
QV1
10
11
12
13
14
640x350
QH
QVRC
17
16
15
QHRC
PM3
Vss
F52K
PM1
PM2
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
WT8045N28P5
WT8045N28P4
VDD
OSCin
1
VDD
OSCin
1
28
28
OSCout
1024x768(56.5K)
OSCout
1024x768(56.5K)
27
2
27
2
HSin
VSin
1024x768 (NI)
26
3
HSin
VSin
1024x768 (NI)
26
25
24
23
3
25
24
23
4
5
6
4
5
6
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
1024x768 (I)
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480
H_out
V_out
H_out
V_out
F43.5K
F36.2K
F33K
F43.5K
F36.2K
F33K
7
8
22
21
7
8
22
21
9
9
20
19
18
640x400
20
19
18
640x400
QV1
10
11
12
13
14
10
11
12
13
14
QV128
QVRC
640x350
QH
640x350
QH
QVRC
17
16
15
17
16
15
QHRC
PM3
QHRC
PM3
Vss
Vss
F52K
F52K
PM1
+PM2
PM1
+PM2
Mute
Mute
Not e: The Hout and Vout pi n of N28P1, N28P3, N28P4 and N28P5 ar e negat i ve pul se.
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
6
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
ABSOLUTE MAXIMUM RATINGS
ITEM
Digital Supply Voltage
SYMBOL
VALUE
5.5
UNIT
V
V
DD
V
V
V
(5)+0.3
V
Horizontal Sync. Input Voltage
Vertical Sync. Input Voltage
Power Dissipation
HS
DD
PP
V
(5)+0.3
V
VS
DD
PP
P
300
mW
¢ J
¢ J
D
Operating Temperature Range
Storage Temperature Range
T
0¡ 7ã0
OPT
T
-40¡ 1ã25
STG
RECOMMENDED OPERATING CONDITIONS
ITEM
Digital Supply Voltage
SYMBOL MIN.
TYP. MAX. UNIT
V
(5)
4.5
5
5.5
V
DD
Supply Current (Standby)
I
13
mA
P
V
V
Synchronous Input Voltage Low
Synchronous Input Voltage High
0.8
5.5
IL
PP
V
2.4
25
4
V
IH
PP
F
Horizontal Synchronous Frequency
Range
Vertical Synchronous Frequency
Range
80
(for N32)
120
KHz
¡ Ð
H
F
50
Hz
¡ Ð
V
F
Crystal Clock Frequency
3.5764
3.58
3.5836 MHz
CLK
Open Drain Pull High Voltage
V
12
V
OH
R
Resistance of Monostable for Hsin
Capacitance of Monostable for Hsin
Resistance of Monostable for Vsin
Capacitance of Monostable for Vsin
10
100
¡ Ð
500
¡ Ð
K£ [
pF
H
H
V
V
C
R
C
100
100
¡ Ð
10
K£ [
pF
¡ Ð
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
7
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
ELECTRICAL CHARACTERISTICS
(V =5V, T
=25°C, Crystal=3.58MHz)
DD OPT
ITEM
SYMBOL
F33K
MIN.
32.9
TYP.
¡ Ð
MAX. UNIT
33.1
KHz
Discrimination of H.
Synchronous Frequency
F36.2K
F43.5K
F52K
36.1
43.4
51.9
59.9
36.3
43.6
52.1
60.1
0.4
KHz
KHz
KHz
KHz
¡ Ð
¡ Ð
¡ Ð
F60K
Output Low (H-out, V-out),
V
V
OL1
PP
when I
= 4mA
OL
Output High (H-out, V-out),
when I = -400£ gA
V
V
2.4
OH1
PP
OH
Open Drain Output Low
when I = 6mA
V
V
0.4
4
OL2
PP
OL
Output Sink Current (H-out, V-out)
when V = 0.4V
I
mA
£ Ag
mA
mA
OL1
OL1
Output Drive Current (H-out, V-out) ¡ WI ¡ W
400
OH1
when V
OH1
= 2.4V
Open Drain Sink Current
when V = 0.4V
I
I
10
40
OL2
OL2
OL2
Open Drain Sink Current
when V = 5V
OL2
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
8
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
MONO_STABLE DYNAMIC ELECTRICAL CHARACTERISTICS
(Ta=25°C; Input t ,t =20ns, C =50PF)
r f
L
ITEM
MIN.
0.558
0.0384
¡ Ð
TYP.
¡ Ð
¡ Ð
100
MAX.
4
UNITS
£ sg
ms
Input H_SYNC Pulse Width
Input V_SYNC Pulse Width
Output Pulse Transition Time
Output Pulse Propagation Delay
Output Pulse Width Adjust Range
0.125
200
600
90
ns
ns
300
¡ Ð
10
¡ Ð
¢ M
H_MONO_STB:
31KHz¡ 3Ð7.5KHz
31KHz¡ 4Ð8KHz
31KHz¡ 5Ð7KHz
31KHz¡ 6Ð4KHz
26.66
20.83
17.54
15.62
£ sg
£ sg
£ sg
£ sg
V_MONO_STB:
(50Hz¡ 1Ð20Hz)*128
6.4KHz¡ 1Ð5.36KHz
(50Hz¡ 8Ð0Hz)*128
65.10
97.66
£ sg
£ sg
6.4KHz¡ 1Ð0.2KHz
10
ms
(50Hz¡ 1Ð20Hz)*1
Typical Pulse width Variation as a
function of Temperature at 75¢ Jto
24 ¢ J
Typical Pulse Width Variation as a
function of Supply Voltage at
4.75V to 5.25V
¡ Ð
¡ Ð
¡ Ð
¡ 2Ó
¡ 2Ó
¢ M
¡ Ð
¢ M
Output Low (Sink) Current
1
6
mA
V
V
¡ Ð
0
Output Voltage Low-Level
Output Voltage High-Level
Output Jitter (Hout & Vout)
0.05
¡ Ð
5
¡ Ð
4.95
ns
Hin & Vin Rise time and Fall time = 200ns
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
9
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
APPLICATION INFORMATION
Struncure
Name
OSCin
Function
of
Terminal
A clock generating circuit is built into the chip. So if a resonator is I
connected to OSCin/OSCout, a clock signal can be obtained
OSCout
Hsin
Refer to OSCin pin
O
Input terminal of horizontal synchronous signal
I, TTL
compatible
I, TTL
Vsin
Input terminal of vertical synchronous signal
compatible
H_OUT
Output pin, fixed negative polarity of original H_SYNC signal with I, TTL
same pulse width (but, positive for N28P2, N28P6,N28P7 and
N28P8)
compatible
V_OUT
Output pin, fixed negative polarity of original V_SYNC signal with O, TTL
same pulse width (but, positive for N28P2, N28P6,N28P7 and
N28P8)
compatible
F43.5k
F36.2k
F33k
>43.5k then active low, <43.5k then high
>36.2k then active low, <36.2k then high
>33k then active low, <33k then high
O, open drain
O, open drain
O, open drain
QV
Output pin, fixed positive polarity of vertical signal; pulse width O, open drain
depend upon RV & CV.
QVRC
Vss
Input pin, connected to Vdd through RV & to ground through CV I
Ground
SELPIN
Input pin, to select which one of H_SYNC or V_SYNC appears on I,
the output pin of QV; N.C. selects the V-SYNC on the output,
grounding selects the H_SYNC.
connection)
(N.C.-no
-QH
Output pin, fixed negative polarity of horizontal signal; pulse width O, open drain
depend upon RH & CH.
F52k
F60k
PM1
>52k then active low, <52k then high
>60k then active low, < 60k then high
Indicate in STAND-BY mode
O, open drain
O, open drain
O, open drain
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
11
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
Struncure
Name
PM2
Function
of
Terminal
Indicate in SUSPEND mode
Indicate in OFF mode
O, open drain
O, open drain
I
PM3
QHRC
QH
Input pin, connected to Vdd through RH & to ground through CH.
Output pin, fixed positive polarity of horizontal signal; pulse width O, open drain
depend upon RH & CH
O, open drain
640¡ Ñ350
Mode select control output, if IBM VGA 640¡ 3Ñ50 mode, or VESA
VGA 640¡ 3Ñ50 mode. Then active "low", else open state output
O, open drain
O, open drain
640¡ Ñ480
640¡ Ñ400
VESA VGA mode 640¡ 4Ñ80 (37.5k/72Hz)
If IBM VGA 640¡ 4Ñ00 mode, or VESA VGA 640¡ 4Ñ00 mode then
active "low" (640¡ 4Ñ00, 31.5k, for N24P4)
O, open drain
O, open drain
640¡ Ñ480
800¡ Ñ600
If IBM VGA 640¡ 4Ñ80 mode, or VESA VGA 640¡ 4Ñ80 mode then
active "low" (640¡ 4Ñ80, 31.5k, for N24P4)
VESA super VGA mode
(H_SYNC = 35.2k, V_SYNC = 56Hz)
European super VGA mode
O, open drain
O, open drain
O, open drain
800¡ Ñ600
800¡ Ñ600
(H_SYNC = 37.5k, V_SYNC = 60Hz)
VESA new super VGA mode
(H_SYNC = 48k, V_SYNC = 72Hz)
IBM 8512/A interlace mode
1024¡ Ñ
768(I)
(H_SYNC = 35.5k, V_SYNC = 86Hz)
O, open drain
O, open drain
O, open drain
1280¡ Ñ
1024
1280¡ 1Ñ024 mode control output
(H_SYNC = 64k, V_SYNC = 60Hz)
IBM 8514/A non-interlace mode
(H_SYNC = 48.5k, V_SYNC = 60Hz)
1024¡ Ñ
768(NI)
1024¡ Ñ
768(57k)
Vdd
XGA 1024¡ 7Ñ68 mode Hsync freq. 57kHz
(H_SYNC = 56.5k, V_SYNC = 72Hz)
5 Volts power supply
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
12
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
APPLICATION DESCRIPTION
DPMS (Display Power Management Signaling) Detection
As per DPMS proposal version 1.0P, revision 0.54P, WT8045 provides Monitor Power
Management Detection Circuit for the convenience of monitor designers in designing power
saving monitors, or the so called "Green Monitors". Please refer to the table 1 as below for
power states defined in the DPMS.
DPMS requires at least 5 seconds delay before transition from ON state to any power saving
state, to avoid unintentionally entering a power saving state during display resolution changes
and timing mode changes. And it can be done instantaneously, for the transition between any
power saving state.
Table 1 Display Power Management Summary
Signals
DPMS
Power
Savings
Recovery
Time
State
Compliance
Requirement
Mandatory
Horizontal Vertical
Video
Active
On
Pulses
Pulses
None
Not
Applicable
Short
Longer
Stand-by
Suspend
Off
No Pulses
Pulses
No Pulses No Pulses Blanked
Pulses
No Pulses Blanked
Blanked
Optional
Mandatory
Mandatory
Minimal
Substantial
Maximum
System
Dependent
*
"No-Pulse" represents the frequency of Hsin or Vsin less than or equal to 10Hz, but
"Pulses" represents that frequency of Hsin greater than or equal to 10KHz and Vsin
greater than or equal to 40Hz
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
13
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
The way WT8045 implements VESA DPMS
As shown on Table 2, WT8045 use PM1 to represent Stand-by State, PM2 as Suspend State and
PM3 as OFF State. When H_SYNC / V_SYNC signals transition from ON State to any one of
the three power saving states, WT8045 will delay 5.9 seconds to meet the VESA DPMS
requirement: the minimum 5 seconds delay to avoid unintentionally entering a power saving
state during display resolution and timing mode changes. If during this delay time period,
H_SYN and V_SYN signals return to ON State, then all three power management pins (PM1,
PM2 and PM3) will remain ON state. If power management state of H_SYNC and V_SYNC
prolong for more than 5.9 seconds, then these three power management pins will change to the
corresponding states. While changing from any power saving state back to ON State will take
about 0.368 second for H_SYNC / VSYNC pulse checking. And transition between any power
saving state will be done immediately.
Table 2: The truth table of Power Saving Detector
MODE
Hsin
Vsin
PM1
PM2
PM3
ON
Pulses
No Pulses
Pulses
No Pulses
No Pulses
Pulses
Pulses
No Pulses
No Pulses
No Pulses
1
0
0
0
1
1
1
0
0
1
1
1
1
0
1
STAND_BY
SUSPEND
OFF
OVERRIDE
Manually PWR ON
OVERRIDE mode:
To initial override, both horizontal and vertical sync signals shall be in the no pulses condition
when the display is maintained during the entire time override is required. As soon as pulses are
detected on horizontal and vertical sync signal. The display shall enter DPMS operation.
Three power management pins are open drain structure and active low. If you do not need all
those three power saving states in your design. You can just short two or three pins of the pins
PM1/PM2/PM3. for example, by shorting pin PM1 and pin PM2, you will have only two power
saving states, that is OFF and Suspend states, so you have three states total, including ON State.
Please refer to Application Circuit 2.
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
14
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
Mono_Stable Circuit
WT8045 includes two sets of Mono_Stable Circuits, one uses H_SYNC as trigger signal, the
other uses either H_SYNC or V_SYNC as trigger signal (this only can be done on 32 pin
package, for 24 pin and 28 pin packages the trigger signal is fixed to H_SYNC); for N24p4
package, there is no mono-stable circuit. Please refer to the figure as below:
QH
T
H- SYNC
vcc
Rx/ Cx QH-
SELECT=OPEN SELECT=L
QV
SWI TCH
T
Q
QH
V- SYNC
SELECT
vcc
Rx/ Cx
Q-
The Mono_Stable Circuit is triggered by positive edge, no matter H_SYNC or V_SYNC is used
as trigger signal. Please refer to the timing chart as below:
Tr i gger Pul se
posi t i ve
negat i ve
Q
Q-
The output of Mono_Stable Circuit is open drain structure, and can be pulled up to +12V
maximum.
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
15
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
In case of using output pulse of V_MONO_STABLE as voltage source, in order to prevent the
problem of slow response time, causing from the low frequency on vertical synchronous signal,
WT8045 internally increases the vertical signal frequency to 128 times the original frequency,
that is from 50Hz - 120 Hz to 6.4KHz - 15.36KHz. Then WT8045 uses this increased frequency
as the input signal of MONO_STABLE, so the leading edge of the signal of the increased
frequency will trigger the MONO_STABLE circuit.
An external resistor (Rx) and an external capacitor (Cx) control the timing and accuracy of the
circuit. Adjustment of Rx and Cx provides a wide range of output pulse widths from the Q and
Q-bar terminals. The delay time from trigger input to output transition is independent of Rx and
Cx.
The minimum value of external resistor Rx is 10k ohms. The typical value of external capacitor
Cx is 100 pF. The time period (T) for this multi-vibrator can be calculated with the formula: T »
1.1 Rx · Cx.
H/V Frequency Divisions and Video Modes
Figure 1 illustrates the typical frequency ranges of H and V sync signals for display monitors.
The operating video modes are determined by the H and V frequencies, and occasionally, by
their polarities. The typical video modes of display monitors include the IBM VGA, VESA VGA,
European VGA/super VGA, VESA super VGA, IBM 8514/A, XGA, and 1280x 1024.
WT8045 can determine 13 standard video modes for 32 pin package (refer to Table 3) according
to H and V frequencies and polarities. These standard video modes include the IBM VGA,
VESA VGA, VESA super VGA and IBM 8514/A. This provides the users with the capability to
adjust the screen size for different modes.
WT8045 pre-sets the discriminating points both on H and V frequencies. The discriminating
points for H sync are 33KHz, 36.2KHz, 43.5KHz, 52KHz and 60KHz (for 32 pin). These
discriminating points will be able to identify various video modes as shown in Fig. 1. WT8045
also provides the flexibility for users to define these discriminating points through mask option.
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
16
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
The tolerance for H sync frequency discrimination is¡ 0Ó.1KHz. For instance, the 33KHz
discriminating point will be able to distinguish the H sync frequency that is either "less than or
equal to" 32.9KHz, or "greater than or equal to" 33.1KHz. There is an ambiguous region
between 32.9KHz and 33.1KHz.
WT8045 has two discriminating points, 64Hz and 78Hz, for the V sync signal as shown in Fig.1.
The tolerance is ¡ 0Ó.4Hz. The discrimination results of V sync frequency are used internally for
mode selection.
Base on the package consideration, IBM VGA mode and VESA VGA mode (both have same
resolution: 640x480, 640x400, 640x350) are decoded on same open Drain structure output pins.
In case of these whole six modes decoding is needed, the horizontal frequency discrimination pin
F33k or F36.2k must take into consideration. The horizontal frequency of IBM VGA mode is
31.5kHz, and VESA IBM VGA mode is 37.5kHz. Using F33k or F36.2k pin can clearly identify
these two standard modes. The decoding circuit is attached on application section for reference.
Graphic Standard
IBM VGA
Resolution
640X350
640X400
640X480
800X600
1024X768
640X350
640X400
640X480
800X600
800X600
1024X768
1024X768
1280X1024
Horizontal
31.5kHz
31.5kHz
31.5kHz
35.2kHz
35.5kHz
37.5kHz
37.5kHz
37.5kHz
37.5kHz
48.0kHz
48.5kHz
56.5kHz
64.0kHz
Vertical
70Hz
70Hz
60Hz
56Hz
86Hz
83Hz
83Hz
72Hz
60Hz
72Hz
60Hz
72Hz
60Hz
Polarities
+,-
-,+
-.-
VESA Super VGA
IBM 8512/A Interlaced
+,-
-,+
-,-
VESA VGA
European Super VGA
VESA New Super VGA
IBM 8514/A Non-Interlaced
VESA New 1024X768
Work Station 1280X1024
Table 3: Graphic Standard and Frequencies
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
17
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
Fv (Hz)
640X350
(+,-)
83.86
78
1024X768
640x400
(-,+)
800X600
640X350
(+,-)
640x400
(-,+)
640X480
(-,-)
1024X768
70.72
64
800X600
1280X1024
640X480
(-,-)
800X600 1024X768
56.60
48
31.5
38
35
56
64
Fh(KHz)
0
52
60
36.2
43.5
33
(58.5 for N28P2)
Fi gur e 1: H/ V Fr equency Di vi si on and Vi deo Mode
PI N
640X480
640X400
640X350
Mode
I BM
640X480
640X400
640X350
640X480
640X400
640X350
0
1
1
0
1
1
1
0
1
1
0
1
1
1
0
1
1
0
VGA
VESA
VGA
Tabl e 4: I BM VGA/ VESA VGA Decodi ng Tabl e
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
18
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
Horizontal Frequency Discriminator
There are horizontal frequency discriminator pins on different type package: 33k, 36.2k (for
N24P4 package); 33k, 36.2k, 43.5k (for 24 pin); 33k, 36.2k, 43.5k, 52k (for 28 pin); 33k, 36.2k,
43.5k, 52k, 60k (for 32 pin); please refer to table 5 for the logical truth table of these pins. These
frequency discriminator pins output can be used for C Capacitor Control directly as well as
S
other application.
Signa
F33k
F36k
F43.5k
F52k
F60k
l
Hsync
Hs<33k
36k>Hs>33k
43.5k>Hs>36k
52k>Hs>43.5k
60k>Hs>52k
1
0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
Table 5: Truth table of Frequency discriminator
Mute function Timing Diagram
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
19
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
APPLICATION CIRCUIT I
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
20
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
APPLICATION CIRCUITII
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
21
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
APPLICATION CIRCUIT III
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
22
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
APPLICATION CIRCUIT IV
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
23
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
DIP OUTLINE DIMENSIONS
A
B
C
D
E
F
G
N24
N28
1250
1385
542
288
152
130
100
100
130
130
650
355
600
310
SKINNY
N32
1650
542
154
100
130
650
600
¡ ¯Dimension in mil
¡ ¯1mm = 39.37 mil
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
24
WT8045
Synchronous
Signal
Discriminator
and
Power Saving Detector for Green Monitor
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
WT8045N28P6
WT8045N28P2
VDD
VDD
1
1
OSCin
OSCin
28
28
1024x768(56.5K)
OSCout
1024x768(56.5K)
OSCout
27
26
25
24
23
27
26
25
24
23
2
3
4
5
6
2
3
4
5
6
HSin
VSin
1024x768 (NI)
HSin
VSin
1024x768 (NI)
1024x768 (I)
800x600(48K)
1024x768 (I)
800x600(48K)
H_out
V_out
H_out
V_out
800x600(37.5K)
800x600(35.2K)
640x480(31.5K)
800x600(37.5K)
800x600(35.2K)
640x480(31.5K)
F43.5K
F36.2K
F43.5K
F36.2K
7
8
7
8
22
21
22
21
640x400
(31.5K/37.5K)
640x400
(31.5K/37.5K)
F33K
F33K
9
9
20
19
18
20
19
18
QV1
10
11
12
13
14
10
11
12
13
14
QV128
QVRC
640x480(37.5K)
QH
640x480(37.5K)
QH
QVRC
17
16
15
17
16
15
QHRC
PM3
QHRC
PM3
Vss
F52K
PM1
Vss
F52K
PM1
PM2
PM2
WT8045N28P8
WT8045N28P7
VDD
OSCin
1
VDD
OSCin
1
28
28
OSCout
1024x768(56.5K)
OSCout
1024x768(56.5K)
27
2
27
2
HSin
VSin
1024x768 (NI)
26
3
HSin
VSin
1024x768 (NI)
26
25
24
23
3
25
24
23
4
5
6
4
5
6
1024x768 (I)
1024x768 (I)
800x600(48K)
800x600(37.5K)
H_out
V_out
H_out
V_out
800x600(48K)
800x600(37.5K)
800x600(35.2K)
640x480(31.5K)
F43.5K
F36.2K
F33K
F43.5K
F36.2K
F33K
7
8
22
21
7
8
22
21
800x600(35.2K)
640x480(31.5K)
640x400
(31.5K/37.5K)
640x400
(31.5K/37.5K)
9
9
20
19
18
20
19
18
QV1
10
11
12
13
14
10
11
12
13
14
QV128
QVRC
640x480(37.5K)
QH
640x480(37.5K)
QH
QVRC
17
16
15
17
16
15
QHRC
PM3
QHRC
PM3
Vss
Vss
F52K
F52K
PM1
+PM2
PM1
+PM2
Mute
Mute
Not e: The Hout and Vout pi n of N28P2, N28P6, N28P7 and N28P8 ar e posi t i ve pul se.
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾
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
25
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