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CYBUS3384

更新时间: 2024-11-05 03:12:19
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描述
Dual 5-Bit Bus Switch

CYBUS3384 数据手册

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Data sheet acquired from Cypress Semiconductor Corporation.  
Data sheet modified to remove devices not offered.  
CYBUS3384  
1CYBUS3L384SCDS  
SCDS103 - May 1994 - Revised February 2000  
Dual 5-Bit Bus Switch  
Functional Description  
Features  
• Zero propagation delay  
The CYBUS3384 is a ten-bit, two-port bidirectional bus switch  
that allows one bus to be connected directly to, or isolated  
from, another without introducing additional propagation delay  
or ground noise. The input and output voltage levels allow di-  
rect interface with TTL and CMOS devices. Two bus enable  
signals, BE1 and BE2, turn on the upper and lower five bits,  
respectively.  
• 2switches connect inputs to outputs  
• Direct bus connection when switches are ON  
• High (>500 Meg ) resistance when switch is OFF  
• Performs bidirectional translator function between  
3.3V and 5.0V power supplies  
• CMOS for low power dissipation  
• Edge-rate control circuitry for significantly improved  
noise characteristics  
Designed with a low resistance of 2, the CYBUS3384 is ideal  
for use in VME or other high DC drive applications.  
The power-off disable feature enables modules and cards to  
be either inserted or withdrawn from operating equipment  
without shutting down power. Additionally, the CYBUS3384 fa-  
cilitates bidirectional interfacing between 3.3V and 5V systems  
by placing a single diode in series with the 5V VCC line and a  
resistor from pin 24 to ground.  
• Inputs and outputs interface with 5.0V CMOS, TTL, or  
3.3V CMOS  
• ESD > 2000V  
• Power-off disable  
The CYBUS3384 is also suitable for small signal analog appli-  
cations where crosstalk and off isolation performance of –66  
dB at 50 MHz are required.  
Logic Block Diagram  
Pin Configurations  
BE  
1
SOIC/QSOP  
Top View  
BE  
2
1
BE  
1
24  
V
CC  
A
B
0
0
2
3
4
5
6
B
A
B
9
23  
22  
21  
0
A
9
0
A
1
B
1
A
8
A
1
B
B
1
20  
19  
18  
17  
16  
A
2
8
B
2
B
A
B
2
7
A
3
A
7
B
B
2
7
3
4
A
3
A
6
8
A
4
B
3
4
9
B
6
B
10  
11  
12  
B
A
5
15  
14  
A
5
B
B
B
5
6
7
A
4
5
GND  
BE  
2
13  
A
6
BUS3384-2  
A
7
A
8
B
B
8
9
BUS3384-1  
A
9
Function Table[1]  
Pin Description  
Inputs  
Name  
Description  
BE1  
H
BE2  
H
B0–4  
B5–9  
High-Z  
High-Z  
A5–9  
Function  
Non-connect  
Connect  
A
B
Bus A, Inputs or Outputs  
Bus B, Inputs or Outputs  
Bus Switch Enable  
High-Z  
A0–4  
L
H
BE1, BE2  
H
L
High-Z  
A0–4  
Connect  
L
L
A5–9  
Connect  
Note:  
1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care.  
Copyright © 2000, Texas Instruments Incorporated  

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