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SN74LVCH244AQDWRQ1

更新时间： 2024-11-23 12:22:31
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德州仪器 - TI 驱动器输出元件
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9页 168K
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OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

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SN74LVCH244AQDWRQ1 数据手册

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SN74LVCH244A-Q1  
OCTAL BUFFER/DRIVER  
WITH 3-STATE OUTPUTS  
www.ti.com  
SCES492A–SEPTEMBER 2003–REVISED DECEMBER 2005  
FEATURES  
DW OR PW PACKAGE  
(TOP VIEW)  
(1)  
•
•
•
Qualification in Accordance With AEC-Q100  
Qualified for Automotive Applications  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
1OE  
1A1  
2Y4  
1A2  
2Y3  
1A3  
2Y2  
1A4  
2Y1  
GND  
V
CC  
Customer-Specific Configuration Control Can  
Be Supported Along With Major-Change  
Approval  
2OE  
1Y1  
2A4  
1Y2  
2A3  
1Y3  
2A2  
1Y4  
2A1  
•
ESD Protection Exceeds 2000 V Per  
MIL-STD-883, Method 3015; Exceeds 200 V  
Using Machine Model (C = 200 pF, R = 0)  
•
•
•
•
Operates From 2 V to 3.6 V  
Inputs Accept Voltages to 5.5 V  
Max tpd of 6.5 ns at 3.3 V  
Typical VOLP (Output Ground Bounce)  
<0.8 V at VCC = 3.3 V, TA = 25°C  
•
•
Typical VOHV (Output VOH Undershoot)  
>2 V at VCC = 3.3 V, TA = 25°C  
Supports Mixed-Mode Signal Operation on All  
Ports (5-V Input/Output Voltage With  
3.3-V VCC  
)
•
•
Ioff Supports Partial-Power-Down Mode  
Operation  
Bus Hold on Data Inputs Eliminates the Need  
for External Pullup/Pulldown Resistors  
(1) Contact factory for details. Q100 qualification data available  
on request.  
DESCRIPTION/ORDERING INFORMATION  
The SN74LVCH244A octal buffer/line driver is designed for 2.7-V to 3.6-V VCC operation.  
This device is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low, this  
devices passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance  
state.  
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors  
with the bus-hold circuitry is not recommended.  
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in  
a mixed 3.3-V/5-V system environment.  
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,  
preventing damaging current backflow through the device when it is powered down.  
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup  
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.  
ORDERING INFORMATION  
TA  
PACKAGE(1)  
Reel of 2000  
Reel of 2000  
ORDERABLE PART NUMBER  
SN74LVCH244AQDWRQ1  
SN74LVCH244AQPWRQ1  
TOP-SIDE MARKING  
LH244AQ  
LH244AQ  
SOIC – DW  
–40°C to 125°C  
TSSOP – PW  
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at  
www.ti.com/sc/package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2003–2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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