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參數(shù)資料
| 型號(hào)： | 74LVX4245WMX |
| 廠商： | Fairchild Semiconductor |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大小： | 0K |
| 描述： | IC TXRX TRANSL DUAL 8BIT 24-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Logic Translator Solutions |
| 產(chǎn)品變化通告： | Product Discontinuation 27/Feb/2012 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | 74LVX |
| 邏輯類(lèi)型： | 收發(fā)器，非反相 |
| 元件數(shù)： | 1 |
| 每個(gè)元件的位元數(shù)： | 8 |
| 輸出電流高，低： | 12mA，12mA; 24mA，24mA |
| 電源電壓： | 2.7 V ~ 3.6 V，4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁(yè)面： | 1212 (CN2011-ZH PDF) |
| 其它名稱(chēng)： | 74LVX4245WMXDKR |
www.fairchildsemi.com
6
74L
VX4245
Applications: Mixed Mode Dual Supply Interface Solution
LVX4245 is designed to solve 3V/5V interfacing issues
when CMOS devices cannot tolerate I/O levels above their
applied VCC. If an I/O pin of 3V ICs is driven by 5V ICs, the
P-Channel transistor in 3V ICs will conduct causing current
flow from I/O bus to the 3V power supply. The resulting
high current flow can cause destruction of 3V ICs through
latchup effects. To prevent this problem, a current limiting
resistor is used typically under direct connection of 3V ICs
and 5V ICs, but it causes speed degradation.
In a better solution, the LVX4245 configures two different
output levels to handle the dual supply interface issues.
The “A” port is a dedicated 5V port to interface 5V ICs. The
“B” port is a dedicated port to interface 3V ICs. Figure 2
shows how LVX4245 fits into a system with 3V subsystem
and 5V subsystem.
This device is also configured as an 8-bit 245 transceiver,
giving the designer 3-STATE capabilities and the ability to
select either bidirectional or unidirectional modes. Since
the center 20 pins are also pin compatible to 74 series 245,
as shown in Figure 1, the designer could use this device in
either a 3V system or a 5V system without any further work
to re-layout the board.
FIGURE 1. LVX4245 Pin Arrangement is Compatible to
20-Pin 74 Series 245
FIGURE 2. LVX4245 Fits into a System with 3V Subsystem and 5V Subsystem
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74LVX4245WMX | 制造商:Fairchild Semiconductor Corporation 功能描述:Translator Logic IC |
| 74LVX541M | 功能描述:緩沖器和線(xiàn)路驅(qū)動(dòng)器 Octal Buff/Line Drv RoHS:否 制造商:Micrel 輸入線(xiàn)路數(shù)量:1 輸出線(xiàn)路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| 74LVX541M_Q | 功能描述:緩沖器和線(xiàn)路驅(qū)動(dòng)器 Octal Buff/Line Drv RoHS:否 制造商:Micrel 輸入線(xiàn)路數(shù)量:1 輸出線(xiàn)路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| 74LVX541MTC | 功能描述:緩沖器和線(xiàn)路驅(qū)動(dòng)器 Octal Buff/Line Drv RoHS:否 制造商:Micrel 輸入線(xiàn)路數(shù)量:1 輸出線(xiàn)路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| 74LVX541MTCX | 功能描述:緩沖器和線(xiàn)路驅(qū)動(dòng)器 Octal Buff/Line Drv RoHS:否 制造商:Micrel 輸入線(xiàn)路數(shù)量:1 輸出線(xiàn)路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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