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74FST3345 Datasheet, PDF (1/6 Pages) ON Semiconductor – 8-Bit Bus Switch | |||
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74FST3345
8âBit Bus Switch
The ON Semiconductor 74FST3345 is an 8âbit, high performance
switch. The device is CMOS TTL compatible when operating between
4 and 5.5 Volts. The device exhibits extremely low RON and adds
nearly zero propagation delay. The device adds no noise or ground
bounce to the system.
The device consists of an 8âbit switch with two Output/Enable pins
(OE and OE).
Features
⢠RON t 4 W Typical
⢠Less Than 0.25 nsâMax Delay Through Switch
⢠Nearly Zero Standby Current
⢠No Circuit Bounce
⢠Control Inputs are TTL/CMOS Compatible
⢠PinâForâPin Compatible with QS3345, FST3345, CBT3345
⢠All Popular Packages: QSOPâ20, TSSOPâ20, SOICâ20
⢠All Devices in Package TSSOP are Inherently PbâFree*
OE 1
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
GND 10
20 VCC
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
11 B7
Figure 1. 20âLead Pinout
2
A0
18
B0
9
A7
11
B7
OE 1
OE 19
Figure 2. Logic Diagram
TRUTH TABLE
Inputs
OE
OE
X
L
H
X
L
H
Function
Connect
Connect
Disconnect
*For additional information on our PbâFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
January, 2005 â Rev. 1
http://onsemi.com
20
1
SOICâ20
DW SUFFIX
CASE 751D
MARKING
DIAGRAMS
20
FST3345
AWLYYWW
1
20
1
TSSOPâ20
DT SUFFIX
CASE 948E
20
1
QSOPâ20
QS SUFFIX
CASE 492A
20
FST
3345
ALYW
1
20
FST3345
AWLYWW
1
A
= Assembly Location
L, WL = Wafer Lot
Y
= Year
W, WW = Work Week
PIN NAMES
Pin
OE1, OE2
1A, 2A
1B, 2B
Description
Bus Switch Enables
Bus A
Bus B
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
Publication Order Number:
74FST3345/D
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