FST3126
4-Bit Bus Switch
The ON Semiconductor FST3126 is a quad, high performance
switch. The device is CMOS TTL compatible when operating between
4 and 5.5 Volts. The device exhibits extremely low R and adds
ON
nearly zero propagation delay. The device adds no noise or ground
bounce to the system.
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The device consists of four independent 1bit switches with
separate Output/Enable (OE) pins. Port A is connected to Port B when
MARKING
OE is high. If OE is low, the switch is high Z.
DIAGRAMS
14
14
Features
FST3126G
1
R 4 Typical
ON
AWLYWW
SOIC14
Less Than 0.25 nsMax Delay Through Switch
D SUFFIX
1
Nearly Zero Standby Current
CASE 751A
No Circuit Bounce
Control Inputs are TTL/CMOS Compatible
14
PinForPin Compatible With QS3126, FST3126, CBT3126
14
FST
All Popular Packages: SOIC14 & TSSOP14
1
3126
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
ALYW
TSSOP14
Compliant
DT SUFFIX
CASE 948G
1
1 14
OE V
1 CC
A = Assembly Location
2 13
1A OE
4
WL, L = Wafer Lot
1B 3 12 4A
Y = Year
4 11
OE 4B
2
WW, W = Work Week
2A 5 10 OE
3
G or = PbFree Package
2B 6 9 3A
7 8 (Note: Microdot may be in either location)
GND 3B
Figure 1. Pin Assignment for
PIN NAMES
SOIC and TSSOP
Pin Description
OE , OE , OE , OE Bus Switch Enables
1 2 3 4
1A, 2A, 3A, 4A Bus A
1B, 2B, 3B, 4B Bus B
NC Not Connected
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2013
1 Publication Order Number:
December, 2017 Rev. 0 FST3126/DFST3126
1
OE
1
2 3
1A 1B
4
OE
2
5 6
2A 2B
10
OE
3
9 8
3A 3B
13
OE
4
12 11
4A 4B
Figure 2. Logic Diagram
TRUTH TABLE
Inputs Outputs
OE A, B
L Z
H A = B
ORDERING INFORMATION
Device Order Number Package Shipping
FST3126DR2G SOIC14 2500 Units / Tape & Reel
(PbFree)
FST3126DTR2G TSSOP14 2500 Units / Tape & Reel
(PbFree)
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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2