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參數(shù)資料
| 型號： | FXMA2102UMX |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | XLATOR/BUFF/REPEAT/ISOLATR 8UMLP |
| 標準包裝： | 1 |
| 邏輯功能： | 變換器，雙向，3 態(tài)，開路漏極 |
| 位數(shù)： | 2 |
| 輸入類型： | 電壓 |
| 輸出類型： | 電壓 |
| 通道數(shù)： | 2 |
| 輸出/通道數(shù)目： | 1 |
| 差分 - 輸入:輸出： | 無/無 |
| 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： | 8-UFQFN |
| 供應(yīng)商設(shè)備封裝： | 8-UMLP |
| 包裝： | 標準包裝 |
| 其它名稱： | FXMA2102UMXDKR |
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FXMA2102
Rev. 1.0.6
7
F
XM
A
2102
—
Dual
-S
upply
,
2
-Bit
Vol
tage
Tra
nsl
a
to
r/
Buf
fer
/
Repe
a
ter
/
Is
ola
to
rfor
I
2
C
Ap
plic
a
tions
Buffer / Repeater Performance
The FXMA2102 dynamic drivers have enough current
sourcing capability to drive a 400 pF capacitive bus.
This is beneficial for instances when an I
2C buffer /
repeater is required. The I
2C specification stipulates a
maximum bus capacitance of 400 pF. If an I
2C segment
exceeds 400 pF, an I
2C buffer / repeater is required to
split the segment into two segments, each of which is
less than 400 pF. Figure 5 is a scope shot of an
FXMA2102 driving a lumped load of 600 pF. Notice the
(30% - 70%) rise time is only 112 ns (RPU = 2.2 K). This
is well below the maximum edge rate of 300 ns. Not
only does the FXMA2102 drive 400 pF, but it also
provides excellent headroom below the I
2C specification
maximum edge rate of 300 ns.
VOL vs. IOL
The I
2C specification mandates a maximum V
IL (IOL of
3 mA) of VCC 0.3 and a maximum VOL of 0.4 V. If there
is a master on the A port of an I
2C translator with a V
CC
of 1.65 V and a slave on the I
2C translator B port with a
VCC of 3.3 V, the maximum VIL of the master is (1.65 V x
0.3) 495 mV. The slave could legally transmit a valid
logic LOW of 0.4 V 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 495 mV. To complicate matters,
the I
2C specification states that 6 mA of I
OL
is
recommended
for
bus
capacitances
approaching
400 pF. More IOL increases the voltage drop across the
I
2C translator. The I2C application benefits when I2C
depicts typical FXMA2102 VOL performance vs. the
competition, given a 0.4 V VIL.
Figure 6. VOL vs. IOL
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FXMA2102UMX_F106 | 功能描述:轉(zhuǎn)換 - 電壓電平 Config Volt Xlator RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MLF-8 |
| FXMA2104 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual-Supply, 4-Bit Voltage Translator / Buffer / Repeater |
| FXMA2104UMX | 功能描述:轉(zhuǎn)換 - 電壓電平 Dual Supply 4-Bit Voltage Translator RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MLF-8 |
| FXMAR1202UMX | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FXMAR2102 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual-Supply, 2-Bit Voltage Translator / Isolator for I2C Applications |
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