參數(shù)資料
型號(hào): SN74LVC1T45DCKRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 總線收發(fā)器
英文描述: LVC/LCX/Z SERIES, 1-BIT TRANSCEIVER, TRUE OUTPUT, PDSO6
封裝: GREEN, PLASTIC, SC-70, 6 PIN
文件頁(yè)數(shù): 5/26頁(yè)
文件大?。?/td> 878K
代理商: SN74LVC1T45DCKRG4
APPLICATION INFORMATION
1
2
3
6
5
4
VCC1
VCC2
SYSTEM-1
SYSTEM-2
1
2
3
6
5
4
VCC1
VCC2
SYSTEM-1
SYSTEM-2
DIR CTRL
I/O-1
VCC2
I/O-2
Pullup/Down
or Bus Hold(1)
Pullup/Down
or Bus Hold(1)
www.ti.com ..................................................................................................................................................... SCES515I – DECEMBER 2003 – REVISED MAY 2009
Figure 2 shows an example of the SN74LVC1T45 being used in a unidirectional logic level-shifting application.
PIN
NAME
FUNCTION
DESCRIPTION
1
VCCA
VCC1
SYSTEM-1 supply voltage (1.65 V to 5.5 V)
2
GND
Device GND
3
A
OUT
Output level depends on VCC1 voltage.
4
B
IN
Input threshold value depends on VCC2 voltage.
5
DIR
GND (low level) determines B-port to A-port direction.
6
VCCB
VCC2
SYSTEM-2 supply voltage (1.65 V to 5.5 V)
Figure 2. Unidirectional Logic Level-Shifting Application
Figure 3 shows the SN74LVC1T45 being used in a bidirectional logic level-shifting application. Since the
SN74LVC1T45 does not have an output-enable (OE) pin, the system designer should take precautions to avoid
bus contention between SYSTEM-1 and SYSTEM-2 when changing directions.
Copyright 2003–2009, Texas Instruments Incorporated
13
Product Folder Link(s): SN74LVC1T45
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