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74FST3345/D Datasheet

  • 74FST3345/D

  • 8-Bit Bus Switch

  • 8頁

  • ETC

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74FST3345
8-Bit Bus Switch
The ON Semiconductor 74FST3345 is an 8鈥揵it, high performance
switch. The device is CMOS TTL compatible when operating between
4 and 5.5 Volts. The device exhibits extremely low R
ON
and adds
nearly zero propagation delay. The device adds no noise or ground
bounce to the system.
The device consists of an 8鈥揵it switch with two Output/Enable pins
(OE and OE).
鈥?/div>
R
ON
t
4
W
Typical
鈥?/div>
Less Than 0.25 ns鈥揗ax Delay Through Switch
鈥?/div>
Nearly Zero Standby Current
鈥?/div>
No Circuit Bounce
鈥?/div>
Control Inputs are TTL/CMOS Compatible
鈥?/div>
Pin鈥揊or鈥揚in Compatible with QS3345, FST3345, CBT3345
鈥?/div>
All Popular Packages: QSOP鈥?0, TSSOP鈥?0, SOIC鈥?0
OE
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
OE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
http://onsemi.com
MARKING
DIAGRAMS
20
1
SO鈥?0
DW SUFFIX
CASE 751D
1
20
20
1
TSSOP鈥?0
DT SUFFIX
CASE 948E
1
20
FST3345
AWLYWW
1
FST
3345
ALYW
FST3345
AWLYYWW
20
20
1
QSOP鈥?0
QS SUFFIX
CASE 492A
B
0
A
L, WL
Y
W, WW
=
=
=
=
Figure 1. 20鈥揕ead Pinout
2
18
A
0
Assembly Location
Wafer Lot
Year
Work Week
A
7
9
11
B
7
PIN NAMES
Pin
Description
Bus Switch Enables
Bus A
Bus B
OE
1
, OE
2
1A, 2A
1B, 2B
OE
OE
1
19
Figure 2. Logic Diagram
ORDERING INFORMATION
TRUTH TABLE
Inputs
OE
X
H
L
OE
L
X
H
Connect
Connect
Disconnect
Function
Device
74FST3345DW
74FST3345DWR2
74FST3345DT
74FST3345DTR2
74FST3345QS
74FST3345QSR
Package
SO鈥?0
SO鈥?0
TSSOP鈥?0
TSSOP鈥?0
QSOP鈥?0
QSOP鈥?0
Shipping
38 Units/Rail
1000 Units/Reel
75 Units/Rail
2500 Units/Reel
55 Units/Rail
2500 Units/Reel
漏
Semiconductor Components Industries, LLC, 2001
1
August, 2001 鈥?Rev. 0
Publication Order Number:
74FST3345/D

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