FSTD32211 40/48-Bit Bus Switch with Level Shifting
September 2001
Revised July 2002
FSTD32211
40/48-Bit Bus Switch with Level Shifting
General Description
The Fairchild Switch FSTD32211 provides up to 48-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. A diode to V
CC
has been
integrated into the circuit to allow for level shifting between
5V inputs and 3.3V outputs.
The device can be organized as four 12-bit, two 24-bit, or
one 48-bit bus switch. When routed as a 40-bit bus switch,
the device can be organized as four 10-bit, two 20-bit or
one 40-bit bus switch. When OE
1
is LOW, the switch is ON
and Port 1A is connected to Port 1B. When OE
2
is LOW,
the switch is ON and Port 2A is connected to Port 2B.
When OE
3
is LOW, the switch is ON and Port 3A is con-
nected to Port 3B. When OE
4
is LOW, the switch is ON and
Port 4A is connected to Port 4B. When OE
1
, OE
2
, OE
3
, or
OE
4
are HIGH, a high impedance state exists between the
A and B Ports.
Features
I
4
鈩?/div>
switch connection between two ports
I
Voltage level shifting
I
Minimal propagation delay through the switch
I
Low l
CC
I
Zero bounce in flow-through mode
I
Control inputs compatible with TTL level
I
Packaged in plastic Fine-Pitch Ball Grid Array (FBGA)
Ordering Code:
Order Number
FSTD32211G
(Note 1)(Note 2)
Package Number
BGA114A
Package Description
114-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
Note 1:
Ordering code 鈥淕鈥?indicates Trays.
Note 2:
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Logic Diagram
漏 2002 Fairchild Semiconductor Corporation
DS500378
www.fairchildsemi.com
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