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SN74LVT244A

更新时间: 2024-09-14 23:06:23
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德州仪器 - TI 驱动器输出元件
页数 文件大小 规格书
7页 111K
描述
3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

SN74LVT244A 数据手册

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SN54LVT244A, SN74LVT244A  
3.3-V ABT OCTAL BUFFERS/DRIVERS  
WITH 3-STATE OUTPUTS  
SCAS354 – FEBRUARY 1994  
SN54LVT244A . . . J PACKAGE  
SN74LVT244A . . . DB, DW, OR PW PACKAGE  
(TOP VIEW)  
State-of-the-Art Advanced BiCMOS  
Technology (ABT) Design for 3.3-V  
Operation and Low-Static Power  
Dissipation  
1OE  
1A1  
2Y4  
1A2  
2Y3  
1A3  
2Y2  
1A4  
2Y1  
GND  
V
CC  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
Supports Mixed-Mode Signal Operation  
2OE  
1Y1  
2A4  
1Y2  
2A3  
1Y3  
(5-V Input and Output Voltages With  
3.3-V V  
)
CC  
Supports Unregulated Battery Operation  
Down to 2.7 V  
Typical V  
(Output Ground Bounce)  
OLP  
< 0.8 V at V  
= 3.3 V, T = 25°C  
13 2A2  
12 1Y4  
CC  
A
Latch-Up Performance Exceeds 500 mA  
11  
2A1  
Per JEDEC Standard JESD-17  
Bus-Hold Data Inputs Eliminate the Need  
SN54LVT244A . . . FK PACKAGE  
(TOP VIEW)  
for External Pullup Resistors  
Supports Live Insertion  
Package Options Include Plastic  
Small-Outline (DW), Shrink Small-Outline  
(DB), and Thin Shrink Small-Outline (PW)  
Packages, Ceramic Chip Carriers (FK), and  
Ceramic DIPs (J)  
3
2
1
20 19  
18  
1Y1  
2A4  
1Y2  
2A3  
1Y3  
1A2  
2Y3  
1A3  
2Y2  
1A4  
4
5
6
7
8
17  
16  
15  
14  
description  
These octal buffers and line drivers are designed  
9 10 11 12 13  
specifically for low-voltage (3.3-V) V operation,  
CC  
but with the capability to provide a TTL interface to  
a 5-V system environment.  
The LVT244A is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low,  
the device 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 is provided to hold unused or floating data inputs at a valid logic level.  
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup  
CC  
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.  
The SN74LVT244A is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count  
and functionality of standard small-outline packages in less than half the printed-circuit-board area.  
The SN54LVT244A is characterized for operation over the full military temperature range of 55°C to 125°C.  
The SN74LVT244A is characterized for operation from 40°C to 85°C.  
FUNCTION TABLE  
(each buffer)  
INPUTS  
OUTPUT  
Y
OE  
A
H
L
L
L
H
L
H
X
Z
Copyright 1994, Texas Instruments Incorporated  
UNLESS OTHERWISE NOTED this document contains PRODUCTION  
DATA information current as of publication date. Products conform to  
specifications per the terms of Texas Instruments standard warranty.  
Production processing does not necessarily include testing of all  
parameters.  
LVT244–5  
2–1  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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