CYBUS3384 Datasheet, PDF (1/11 Pages) Texas Instruments – Dual 5-Bit Bus Switch

Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CYBUS3384
SCDS103 ^{1CYBUS3L384SCDS} - May 1994 - Revised February 2000
Features
• Zero propagation delay
• 2Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• High (>500 Meg Ω) 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
• Inputs and outputs interface with 5.0V CMOS, TTL, or
3.3V CMOS
• ESD > 2000V
• Power-off disable
Logic Block Diagram
BE₁
BE₂
A₀
B₀
A₁
B₁
A₂
B₂
A₃
B₃
A₄
B₄
A₅
B₅
A₆
B₆
A₇
B₇
A₈
B₈
A₉
B₉
BUS3384-1
Pin Description
Name
A
B
BE₁, BE₂
Description
Bus A, Inputs or Outputs
Bus B, Inputs or Outputs
Bus Switch Enable
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, BE₁ and BE₂, turn on the upper and lower five bits,
respectively.
Designed with a low resistance of 2Ω, 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be either inserted or withdrawn from operating equipment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 –66
dB at 50 MHz are required.
Pin Configurations
SOIC/QSOP
Top View
BE₁ 1
B₀ 2
A₀
3
A₁
4
B₁ 5
B₂ 6
A_{2 7}
A_{3 8}
B_{3 9}
B_{4 10}
A_{4 11}
GND ₁₂
24 V_CC
23 B9
22 A9
21 A₈
20 B8
19 B7
18 A7
17 ^A6
16 B6
15 ^B5
14 A5
13 ^BE2
BUS3384-2
Function Table^[1]
Inputs
BE₁
BE₂
B_0–4
B_5–9
Function
H
H
High-Z High-Z Non-connect
L
H
A_0–4
High-Z
Connect
H
L
High-Z
A_5–9
Connect
L
L
A_0–4
A_5–9
Connect
Note:
1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care.
Copyright © 2000, Texas Instruments Incorporated