參數(shù)資料
型號: ISL54103
廠商: Intersil Corporation
英文描述: DDC Accelerator (DDCA)(DDC加速器(DDCA))
中文描述: DDC的加速器(DDCA)(DDC的加速器(DDCA))
文件頁數(shù): 6/7頁
文件大?。?/td> 177K
代理商: ISL54103
6
FN6303.1
June 22, 2006
consumption. When either of the two signals is pulled LOW,
an active pull-up current of 275μA maintains a good V
OL
noise margin.
When the bus line is released, it is pulled high by the
ISL54103 active current until the voltage exceeds the
V
TRIPL
level for a period of time. This voltage-time
combination filters out noise on the signal line. Once the
ISL54103 detects a valid rising edge, a 2.2mA boost current
pulls the bus line high very quickly (see Figure 8). This boost
current turns off when the input level reaches the V
TRIPH
threshold and the pull-up current returns to the active level. If
both inputs are HIGH, the pull-up current drops to the
standby level of 100μA.
FIGURE 8. ISL54103 DDC SYSTEM BOOST PULL-UP
COMPARED TO RESISTOR PULL-UP
(V
DD
= 5.5V)
FIGURE 9. ISL54103 DDC SYSTEM BOOST PULL-UP
COMPARED TO RESISTOR PULL-UP
(V
DD
= 2.7V)
FIGURE 10. NOISE SUPPRESSION. BOOST CURRENT
APPLIED WHEN INPUT SIGNAL EXCEEDS 20Vns
(TYPICAL)
V
TRIPL
With RC
Pullup
With ISL54103 DDCA
V
TRIPH
R = 15.8K
C = 200pF
V
TRIPL
With RC
Pullup
With ISL54103 DDCA
V
TRIPH
R = 15.8K
C = 200pF
V
TRIPL
Gnd
t
DDC1
DDC2
>20Vns
(Typical)
V
DD
With DDCA
Without DDCA
V
TRIPH
ISL54103
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