IDTQS3R245 Datasheet, PDF (1/5 Pages) Integrated Device Technology – HIGH-SPEED CMOS QUICKSWITCH 8-BIT LOW RESISTANCE BUS SWITCH

IDTQS3R245
HIGH-SPEED CMOS QUICKSWITCH 8-BIT LOW RESISTANCE BUS SWITCH
QUICKSWITCH^® PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH 8-BIT LOW
RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
IDTQS3R245
FEATURES:
• Enhanced N channel FET with no inherent diode to Vcc
• 5Ω bidirectional switches connect inputs to outputs
• Pin compatible with the 74F245, 74FCT245, and 74FCT245T
• Zero propagation delay, zero ground bounce
• Undershoot clamp diodes on all switch and control inputs
• TTL-compatible control inputs
• Available in SOIC and QSOP packages
APPLICATIONS:
• Hot-swapping and hot-docking (low resistance for PCI and
Compact PCI applications)
• Bus switching and isolation
• Voltage translation (5V to 3.3V)
• Capacitance reduction and isolation
• Power conservation
• Logic replacement (data processing)
• Clock gating
DESCRIPTION:
The QS3R245 provides a set of eight high-speed CMOS TTL-compatible
bus switches in a pinout compatible with 74FCT245, 74F245, 74ALS/AS/
LS245 8-bit transceivers. The low ON resistance of the QS3R245 allows
inputs to be connected to outputs without adding propagation delay and
without generating additional ground bounce noise. The Output Enable (OE)
signal turns the switches on similar to the OE signal of the 74’245. The low
ON resistance of QS3R245 makes it ideal for PCI hot docking applications.
QuickSwitch devices provide an order of magnitude faster speed than
conventional logic devices.
The QS3R245 is characterized for operation at -40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
A0 A1 A2 A3 A4 A5 A6 A7
OE
B0 B1 B2 B3 B4 B5 B6 B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 1999 Integrated Device Technology, Inc.
NOVEMBER 1999
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