74FST3345_06 Datasheet, PDF (1/6 Pages) ON Semiconductor – 8−Bit Bus Switch

74FST3345
8−Bit Bus Switch
The ON Semiconductor 74FST3345 is an 8−bit, 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−bit switch with two Output/Enable pins
(OE and OE).
Features
• R_ON t 4 W Typical
• Less Than 0.25 ns−Max Delay Through Switch
• Nearly Zero Standby Current
• No Circuit Bounce
• Control Inputs are TTL/CMOS Compatible
• Pin−For−Pin Compatible with QS3345, FST3345, CBT3345
• All Popular Packages: QSOP−20, TSSOP−20, SOIC−20
• All Devices in Package TSSOP are Inherently Pb−Free*
OE 1
A₀ 2
A₁ 3
A₂ 4
A₃ 5
A₄ 6
A₅ 7
A₆ 8
A₇ 9
GND 10
20 V_CC
19 OE
18 B₀
17 B₁
16 B₂
15 B₃
14 B₄
13 B₅
12 B₆
11 B₇
Figure 1. 20−Lead 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 Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 2
http://onsemi.com
20
1
SOIC−20
DW SUFFIX
CASE 751D
MARKING
DIAGRAMS
20
FST3345
AWLYYWW
1
20
1
TSSOP−20
DT SUFFIX
CASE 948E
20
1
QSOP−20
QS SUFFIX
CASE 492A
20
FST
3345
ALYW
1
20
FST3345
AWLYWW
1
A
=
L, WL =
Y
=
W, WW =
Assembly Location
Wafer Lot
Year
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