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參數(shù)資料
| 型號： | 74LVX4245MTC |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 0K |
| 描述： | TXRX 8-BIT DUAL 3STATE 24TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | Logic Translator Solutions |
| 標準包裝： | 61 |
| 系列： | 74LVX |
| 邏輯類型： | 收發(fā)器，非反相 |
| 元件數(shù)： | 1 |
| 每個元件的位元數(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 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1212 (CN2011-ZH PDF) |
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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參數(shù)描述 |
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| 74LVX4245MTC_Q | 功能描述:總線收發(fā)器 8-Bit Dl Supp Trans RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74LVX4245MTCX | 功能描述:總線收發(fā)器 8-Bit Dl Supp Trans RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74LVX4245MTR | 功能描述:總線收發(fā)器 Octal Bus Transceivr RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74LVX4245MTR | 制造商:STMicroelectronics 功能描述:OCTAL DUAL SUPPLY BUS TRANSCEIVER |
| 74LVX4245QSC | 功能描述:總線收發(fā)器 8-Bit Dl Supp Trans RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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