Preliminary
FST16244 16-Bit Bus Switch (Preliminary)
May 2001
Revised May 2001
FST16244
16-Bit Bus Switch (Preliminary)
General Description
The Fairchild Switch FST16244 provides 16-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 a 16-bit switch. There are four
4-bit switches with separate output enable inputs. When
OE is LOW, the switch in ON and Port A is connected to
Port B. When OE is HIGH, the switch OFF and a high
impedance state exists between the A and B Ports.
Features
s
4
鈩?/div>
switch connection between two ports.
s
Minimal propagation delay through the switch.
s
Low l
CC
.
s
Zero bounce in flow-through mode.
s
Control inputs compatible with TTL level.
Ordering Code:
Order Number
FST16244MTD
Package Number
MTD48
Package Description
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Logic Diagram
Pin Descriptions
Pin Name
OE
n
1A
n
, 2A
n
, 3A
n
, 4A
n
1B
n
, 2B
n
, 3B
n
, 4B
n
Description
Output Enable Input (Active LOW)
Bus A
Bus B
Truth Table
Inputs
OE
x
L
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
Outputs
A, B
A Port
=
B Port
Z
Z
=
High Impedance
漏 2001 Fairchild Semiconductor Corporation
DS500420
www.fairchildsemi.com
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