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CYBUS3384SOC Datasheet

  • CYBUS3384SOC

  • Dual 5-Bit Bus Switch

  • 227.38KB

  • 11頁

  • TI

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Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modi鏗乪d to remove devices not offered.
CYBUS3384
SCDS103 - May 1994 - Revised February 2000
1CYBUS3L384SCDS
Dual 5-Bit Bus Switch
Functional Description
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, BE
1
and BE
2
, turn on the upper and lower 鏗乿e bits,
respectively.
Designed with a low resistance of 2鈩? 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be either inserted or withdrawn from operating equipment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 V
CC
line and a
resistor from pin 24 to ground.
The CYBUS3384 is also suitable for small signal analog appli-
cations where crosstalk and off isolation performance of 鈥?6
dB at 50 MHz are required.
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Zero propagation delay
2鈩?switches connect inputs to outputs
Direct bus connection when switches are ON
High (>500 Meg
鈩?
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 signi鏗乧antly improved
noise characteristics
Inputs and outputs interface with 5.0V CMOS, TTL, or
3.3V CMOS
ESD > 2000V
Power-off disable
Logic Block Diagram
BE
1
BE
2
Pin Configurations
SOIC/QSOP
Top View
BE
1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
B
9
A
9
A
8
B
8
B
7
A
7
A
6
B
6
B
5
A
5
BE
2
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
BUS3384-1
B
0
A
0
A
1
B
1
B
2
A
2
A
3
B
3
B
4
A
4
GND
BUS3384-2
Pin Description
Name
A
B
BE
1
, BE
2
Description
Bus A, Inputs or Outputs
Bus B, Inputs or Outputs
Bus Switch Enable
Function Table
[1]
Inputs
BE
1
H
L
H
L
BE
2
H
H
L
L
B
0鈥?
High-Z
A
0鈥?
High-Z
A
0鈥?
B
5鈥?
High-Z
High-Z
A
5鈥?
A
5鈥?
Function
Non-connect
Connect
Connect
Connect
Note:
1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don鈥檛 Care.
Copyright
漏
2000, Texas Instruments Incorporated

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