74FST3245
8-Bit Bus Switch
The ON Semiconductor 74FST3245 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. Port A is connected to Port B
when OE is low. If OE is high, the switch is high Z.
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 QS3245, FST3245, CBT3245
鈥?/div>
All Popular Packages: QSOP鈥?0, TSSOP鈥?0, SOIC鈥?0
NC
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
FST3245
AWLYYWW
20
20
1
TSSOP鈥?0
DT SUFFIX
CASE 948E
FST
3245
ALYW
1
20
1
QSOP鈥?0
QS SUFFIX
CASE 492A
A
L, WL
Y
W, WW
B
0
=
=
=
=
20
FST3245
AWLYWW
1
Figure 1. 20鈥揕ead Pinout
OE
19
A
0
2
18
Assembly Location
Wafer Lot
Year
Work Week
PIN NAMES
Pin
OE
1
, OE
2
A
7
9
11
B
7
1A, 2A
1B, 2B
Description
Bus Switch Enables
Bus A
Bus B
Figure 2. Logic Diagram
TRUTH TABLE
Input OE
L
H
Function
Connect
Disconnect
ORDERING INFORMATION
Device
74FST3245DW
74FST3245DWR2
74FST3245DT
74FST3245DTR2
74FST3245QS
74FST3245QSR
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:
74FST3245/D
74FST3245QSR 產(chǎn)品屬性
2,500
集成電路 (IC)
邏輯 - 信號開關，多路復用器，解碼器
74FST
總線開關
1 x 8:1
1
-
單電源
4 V ~ 5.5 V
-40°C ~ 85°C
表面貼裝
20-SSOP（0.154"，3.90mm 寬）
20-QSOP
帶卷 (TR)
74FST3245QSROS
74FST3245QSR相關型號PDF文件下載
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