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SN74LVC4245A_08

更新时间： 2024-11-16 11:55:03
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德州仪器 - TI 总线收发器输出元件
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15页 396K
描述
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS

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SN74LVC4245A_08 数据手册

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SN74LVC4245A  
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER  
WITH 3-STATE OUTPUTS  
www.ti.com  
SCAS375H–MARCH 1994–REVISED MARCH 2005  
FEATURES  
DB, DW, OR PW PACKAGE  
(TOP VIEW)  
•
•
•
Bidirectional Voltage Translator  
5.5 V on A Port and 2.7 V to 3.6 V on B Port  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
(5 V) V  
V
V
(3.3 V)  
(3.3 V)  
CCA  
CCB  
Control Inputs VIH/VIL Levels Are Referenced  
to VCCA Voltage  
2
DIR  
CCB  
3
A1  
A2  
A3  
A4  
A5  
A6  
A7  
A8  
OE  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
B8  
GND  
•
•
Latch-Up Performance Exceeds 250 mA Per  
JESD 17  
4
5
ESD Protection Exceeds JESD 22  
– 2000-V Human-Body Model (A114-A)  
– 200-V Machine Model (A115-A)  
6
7
8
9
– 1000-V Charged-Device Model (C101)  
10  
11  
12  
GND  
GND  
DESCRIPTION/ORDERING INFORMATION  
This 8-bit (octal) noninverting bus transceiver  
contains two separate supply rails; B port has VCCB  
,
which is set at 3.3 V, and A port has VCCA, which is  
set at 5 V. This allows for translation from a 3.3-V to  
a 5-V environment, and vice versa.  
<br/>  
The SN74LVC4245A is designed for asynchronous communication between data buses. The device transmits  
data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the  
direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are  
effectively isolated. The control circuitry (DIR, OE) is powered by VCCA  
.
The SN74LVC4245A pinout allows the designer to switch to a normal all-3.3-V or all-5-V 20-pin '245 device  
without board re-layout. The designer uses the data paths for pins 2–11 and 14–23 of the SN74LVC4245A to  
align with the conventional '245 pinout.  
ORDERING INFORMATION  
TA  
PACKAGE(1)  
Tube of 25  
ORDERABLE PART NUMBER  
SN74LVC4245ADW  
TOP-SIDE MARKING  
LVC4245A  
SOIC – DW  
SSOP – DB  
Reel of 2000  
Reel of 2000  
Tube of 60  
SN74LVC4245ADWR  
SN74LVC4245ADBR  
SN74LVC4245APW  
SN74LVC4245APWR  
SN74LVC4245APWT  
LJ245A  
LJ245A  
–40°C to 85°C  
TSSOP – PW  
Reel of 2000  
Reel of 250  
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at  
www.ti.com/sc/package.  
FUNCTION TABLE  
INPUTS  
OPERATION  
OE  
L
DIR  
L
B data to A bus  
A data to B bus  
Isolation  
L
H
H
X
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 © 1994–2005, 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.  
1234567...15

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