FST3345_08 Datasheet, PDF (1/9 Pages) Fairchild Semiconductor – 8-Bit Bus Switch

March 2008
FST3345 — 8-Bit Bus Switch
Features
ƒ 4Ω Switch Connection between Two Ports
ƒ Minimal Propagation Delay through the Switch
ƒ Low ICC
ƒ Zero Bounce in Flow-through Mode
ƒ Control Inputs Compatible with TTL Level
Description
The FST3345 switch provides eight-bits of high-speed
CMOS TTL-compatible bus switching. The low on
resistance of the switch allows inputs to be connected
to outputs without adding propagation delay or
generating additional ground bounce noise.
The device is organized as an eight-bit switch with dual
output enable inputs (OE and /OE). When /OE is LOW
or OE is HIGH, the switch is ON and port A is
connected to port B. When /OE is HIGH, and OE is
LOW, the switch is OPEN and a high-impedance state
exists between the two ports.
Ordering Information
Operating
Part Number Temperature
Range
Package
FST3345WMX
-40 to +85°C
20-Lead, Small Outline Integrated Circuit (SOIC), JEDEC
MS-013, 0.300-inch Wide
FST3345QSC
-40 to +85°C
20-Lead Quarter Size Outline Package (QSOP), JEDEC
MO-137, 0.150-inch Wide
FST3345QSCX
-40 to +85°C
20-Lead Quarter Size Outline Package (QSOP), JEDEC
MO-137, 0.150-inch Wide
FST3345MTC
-40 to +85°C
20-Lead Thin Shrink Small Outline Package (TSSOP),
JEDEC MO-153, 4.4mm Wide
FST3345MTCX
-40 to +85°C
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC
MO-153, 4.4mm Wide
Packing
Method
Tape and Reel
Tube
Tape and Reel
Tube
Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
The Fairchild switch family derives from and embodies Fairchild’s proven switch technology used for several years in its
74LVX3L384 (FST3384) bus switch product.
Logic Diagram
A₀ ²
18 _B0
A₇ ⁹
11 _B7
OE ¹
/OE ¹⁹
Figure 1. Logic Diagram
©1997 Fairchild Semiconductor Corporation
FST3345 • Rev. 1.0.2
www.fairchildsemi.com