IDTQS3244
HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH
8-BIT BUS SWITCH
IDTQS3244
FEATURES:
DESCRIPTION:
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The QS3244 provides a set of eight high-speed CMOS TTL-compatible
bus switches in a pinout compatible with 74FCT244, 74F244, 74ALS/AS/
LS244 8-bit drivers. The low ON resistance (5Ω) of the 3244 allows inputs
to be connected to outputs without adding propagation delay and without
generating additional ground bounce noise. The two enable (xG) signals
turn the switches on similar to the xG signals of the 74’244.
QuickSwitch devices provide an order of magnitude faster speed than
conventional logic devices.
The QS3244 is characterized for operation at -40°C to +85°C.
Enhanced N channel FET with no inherent diode to Vcc
5Ω bidirectional switches connect inputs to outputs
Ω
Pin compatible with 74F244, 74FCT244, and 74FCT244T
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
Available in QSOP, SOIC, and TSSOP packages
APPLICATIONS:
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Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Power conservation
Capacitance reduction and isolation
Logic replacement (data processing)
Clock gating
Bus switching and isolation
FUNCTIONAL BLOCK DIAGRAM
1G
2G
1A 1
1Y 1
2A 1
2Y 1
1A 2
1Y 2
2A 2
2Y 2
1A 3
1Y 3
2A 3
2Y 3
1A 4
1Y 4
2A 4
2Y 4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
OCTOBER 2008
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c
2006 Integrated Device Technology, Inc.
DSC-5722/8
