Fairchild Semiconductor FSTD16244 Datasheet
November 2001
Revised November 2001
FSTD16244
16-Bit Bus Switch with Level Shifting (Preliminary)
Preliminary
FSTD16244 16-Bit Bus Switch with Level Shifting (Preliminary)
General Description
The Fairchild Switc h FSTD16244 provides 16-bi ts of highspeed 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 b ounce noise. A diode to V
integrated into the circuit to allow for leve l shifting b etween
5V inputs and 3.3V outputs.
The device is o rganized a s a 16- bit switch . There are fo ur
4-bit switches with separ ate output enable inputs. When
OE
is LOW, the switch in ON and P ort A is connected to
Port B. When OE
impedance state exists between the A and B Ports.
is HIGH, the switch OFF and a high
has been
CC
Features
■ 4Ω switch connection between two ports.
■ Minimal propagation delay through the switch.
■ Low l
■ Zero bounce in flow-through mode.
■ Control inputs compatible with TTL level.
■ TruTranslation
.
CC
3.3V outputs
voltage translation from 5.0V inp uts to
Ordering Code:
Order Number Package Number Package Description
FSTD16244MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP) , JEDEC MO-153, 6.1mm Wide
Devices also availab le in Tape and Reel. Specify by appending the suffix letter “X” to the o rdering code.
TruTranslation is trademark of Fairc hild Semiconduct or C orporation.
© 2001 Fairchild Semiconductor Corporation DS500693 www.fairchildsemi.com
Connection Diagram Logic Diagram
FSTD16244
Pin Descriptions Truth Table
Pin Name Description
OE
, 2An, 3An, 4A
1A
n
1B
, 2Bn, 3Bn, 4B
n
n
Output Enable Input (Active LOW)
n
n
Bus A
Bus B
H = HIGH Voltage Level L = LOW Voltage Level Z = High Impedance
Inputs Outputs
OE
Preliminary
x
LA Port
HZ
A, B
= B Port
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