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PDF FSTU6800MTC Data sheet ( Hoja de datos )
| Número de pieza | FSTU6800MTC | |
| Descripción | 10-Bit Bus Switch with Pre-Charged Outputs and −2V Undershoot Hardened Circuit (UHC) Protection | |
| Fabricantes | Fairchild Semiconductor | |
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December 1998
Revised December 1999
FSTU6800
10-Bit Bus Switch with Pre-Charged Outputs
and −2V Undershoot Hardened Circuit (UHC) Protection
General Description
The Fairchild Switch FSTU6800 provides 10-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. Both the A Ports and the B
Ports are “undershoot hardened” with UHC protection to
support an extended input range to 2.0V below ground.
Fairchild’s integrated Undershoot Hardened Circuit, UHC
senses undershoot at the I/Os, and responds by preventing
voltage differentials from developing and turning on the
switch. The device also precharges the B Port to a select-
able bias voltage (BiasV) to minimize live insertion noise.
The device is organized as a 10-bit switch with a bus
enable (OE) signal. When OE is LOW, the switch is ON
and Port A is connected to Port B. When OE is HIGH, the
switch is OPEN and the B Port is precharged to BiasV
through an equivalent 10-kΩ resistor.
Features
s 4Ω switch connection between two ports.
s Undershoot Hardened to -2.0V.
s Soft enable turn-on to minimize bus-to-bus charge
sharing during enable.
s Low lCC.
s Zero bounce in flow-through mode.
s Output precharge to minimize live insertion noise.
s Control inputs compatible with TTL level.
s See Applications Note AN-5008 for details.
Ordering Code:
Order Number
FSTU6800WM
FSTU6800QSC
FSTU6800MTC
Package Number
Package Description
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MO-153 4.4mm Wide
MQA24
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150” Wide
MTC24
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Connection Diagram
Pin Descriptions
Pin Name
OE
A
B
BiasV
Description
Bus Switch Enable
Bus A
Bus B
Bus B Voltage Bias
Truth Table
OE B0–B9
L A0–A9
H BiasV
UHC is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS500194
Function
Connect
Precharge
www.fairchildsemi.com
1 page  
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC24
Technology Description
The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its
74LVX3L384 (FST3384) bus switch product.
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
5 www.fairchildsemi.com
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| PDF Descargar | [ Datasheet FSTU6800MTC.PDF ] | |
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