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WT8048N2 데이터시트 PDF




ETC에서 제조한 전자 부품 WT8048N2은 전자 산업 및 응용 분야에서
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부품번호 WT8048N2 기능
기능 DPMS (Display Power Management Signaling) Detector for Green Monitor
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WT8048N2 데이터시트, 핀배열, 회로
eltrend
WT8048
DPMS (Display Power Management
Signaling) Detector for Green Monitor
Aug. 31, 1995
DESCRIPTION
The WT8048 is a 8 pin P-DIP package IC, designed for the application of Power Saving
Monitor or Green Monitor.
As per DPMS proposal, the WT8048 provides a detective circuit of monitor power
management for the convenience of designers in designing Power Saving Monitor.
FEATURES
{ Accepting two seperated H&V synchronous signals with positive/ negative polarity.
{ Capable of processing horizontal frequency between 0Hz to 100kHz, and vertical
frequency between 0Hz to 100Hz.
{ Power Saving mode - It can detect the conditions of monitor to decide which will be
selected as following: ON mode / STAND_BY mode / SUSPEND mode / OFF mode.
{ An Override mode is defined to override the DPMS function during the design, test,
burn-in manufacture or diagnostic process if desired.
APPLICATION
{ DPMS mode's detection for Green Monitor
Weltrend Semiconductor, Inc.
2F., No. 24, Ind. E. 9th Rd., Science-Based Ind. Park,
Hsin-Chu, Taiwan, R. O. C.
Tel: 886-35-780241 Fax: 886-35-7704191




WT8048N2 pdf, 반도체, 판매, 대치품
eltrend
WT8048
ELECTRICAL CHARACTERISTICS
A. WT8048
(VDD=5V, TOPT=24¢ J, FOSC=32768Hz)
ITEM
Input Current (HIN, VIN), when VIN=5V
Open Drain Output Low, when IOL = 6mA
Open Drain Sink Current, when VOL = 0.4V
Input Current (OSC), when VIN = 5V
SYMBOL
IIN1
VOL
VOL
IIN3
MIN.
TYP.
MAX.
5
0.4
6
5
UNIT
£ gA
VPP
mA
£ gA
B. WT8048N1 / N2
(VDD=5V, TOPT=24¢ J, FOSC= 450KHz)
ITEM
Input Current (HIN, VIN), when VIN=5V
Open Drain Output Low, when IOL = 6mA
Open Drain Sink Current, when VOL = 0.4V
Input Current (OSC), when VIN = 5V
SYMBOL
IIN1
VOL
VOL
IIN3
MIN.
TYP.
MAX.
5
0.4
6
15
UNIT
£ gA
VPP
mA
mA
C. WT8048N3 / N4
(VDD=5V, TOPT=24¢ J, FOSC= 3.58MHz)
ITEM
Input Current (HIN, VIN), when VIN=5V
Open Drain Output Low, when IOL = 6mA
Open Drain Sink Current, when VOL = 0.4V
Input Current (OSC), when VIN = 5V
SYMBOL
IIN1
VOL
VOL
IIN3
MIN.
TYP.
MAX.
5
0.4
6
5
UNIT
£ gA
VPP
mA
£ gA
4

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WT8048N2 전자부품, 판매, 대치품
eltrend
WT8048
The Way WT8048 implements VESA DPMS
As shown on Table 2, when H_SYNC / V_SYNC signals transition from ON state to any one
of the three power saving state, WT8048 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 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 / V_SYNC pulse checking. And transition between any power saving
state will be done immediately.
MODE
ON
STAND_BY
SUSPEND
OFF
OVERRIDE
Table 2: The truth table of Power Saving Detector
HSIN
VSIN
Pulses
Pulses
No Pulses
Pulses
Pulses
No
Pulses
No Pulses
No
Pulses
No Pulses
No
Pulses
Manually Power On
STD_B
Y
1
0
0
0
1
SUSPEND
1
1
0
0
1
OFF
1
1
1
0
1
7

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