參數(shù)資料
型號(hào): FXMAR2104UMX
廠商: Fairchild Semiconductor
文件頁(yè)數(shù): 13/15頁(yè)
文件大?。?/td> 0K
描述: TRANSLATOR 4BIT DUAL 12-UMLP
標(biāo)準(zhǔn)包裝: 5,000
邏輯功能: 變換器,雙向,3 態(tài),開(kāi)路漏極
位數(shù): 4
輸入類型: 電壓
輸出類型: 電壓
數(shù)據(jù)速率: *
通道數(shù): 4
輸出/通道數(shù)目: 1
差分 - 輸入:輸出: 無(wú)/無(wú)
傳輸延遲(最大): 4ns
電源電壓: 1.65 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
封裝/外殼: *
供應(yīng)商設(shè)備封裝: *
包裝: *
2011 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FXMAR2104 Rev. 1.0.1
7
FXMAR2104
Dual-Supply,
4-Bit
Voltage
Translator
/
Isolator
/
for
Open-D
rain
and
Push-Pull
Applications
VOL vs. IOL
The I
2C specification mandates a maximum V
IL (IOL of
3mA) of VCC 0.3 and a maximum VOL of 0.4V. If there
is a master on the A port of an I
2C translator with a V
CC
of 1.65V and a slave on the I
2C translator B port with a
VCC of 3.3V, the maximum VIL of the master is (1.65V x
0.3) 495mV. The slave could legally transmit a valid
logic LOW of 0.4V to the master.
If the I
2C translator’s channel resistance is too high, the
voltage drop across the translator could present a VIL to
the master greater than 495mV. To complicate matters,
the
I
2C specification states that 6mA of I
OL
is
recommended
for
bus
capacitances
approaching
400pF. More IOL increases the voltage drop across the
I
2C translator. The I2C application benefits when I2C
translators exhibit low VOL performance. Figure 5
depicts typical FXMAR2104 VOL performance vs. a
competitor, given a 0.4V VIL.
Figure 5. VOL vs. IOL
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