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FSTU6800_06

Description
10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection
File Size180KB,5 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
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FSTU6800_06 Overview

10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection

FSTU6800 10-Bit Bus Switch with Precharged Outputs
December 1998
Revised October 2006
FSTU6800
10-Bit Bus Switch with Precharged Outputs
and
2V Undershoot 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 have “undershoot hardened” circuit protection to sup-
port an extended input range to 2.0V below ground. Fair-
child’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-k
resistor.
Features
s
4
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 l
CC
.
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
M24B
MQA24
MTC24
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide
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
L
H
B
0
–B
9
A
0
–A
9
BiasV
Function
Connect
Precharge
UHC® is a registered trademark of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation
DS500194
www.fairchildsemi.com

FSTU6800_06 Related Products

FSTU6800_06 FSTU6800 FSTU6800WM FSTU6800QSC FSTU6800MTC
Description 10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection 10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection 10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection 10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection 10-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection
Is it Rohs certified? - - conform to incompatible conform to
Maker - - Fairchild Fairchild Fairchild
Parts packaging code - - SOIC SSOP TSSOP
package instruction - - SOP, SOP24,.4 0.150 INCH, MO-137, QSOP-24 TSSOP, TSSOP24,.25
Contacts - - 24 24 24
Reach Compliance Code - - compli unknow unknow
Other features - - TTL COMPATIBLE BUS SWITCH TTL COMPATIBLE BUS SWITCH TTL COMPATIBLE BUS SWITCH
series - - CBT/FST/QS/5C/B CBT/FST/QS/5C/B CBT/FST/QS/5C/B
JESD-30 code - - R-PDSO-G24 R-PDSO-G24 R-PDSO-G24
length - - 15.4 mm 8.65 mm 7.8 mm
Logic integrated circuit type - - BUS DRIVER BUS DRIVER BUS DRIVER
Number of digits - - 10 10 10
Number of functions - - 1 1 1
Number of ports - - 2 2 2
Number of terminals - - 24 24 24
Maximum operating temperature - - 85 °C 85 °C 85 °C
Minimum operating temperature - - -40 °C -40 °C -40 °C
Output characteristics - - 3-STATE 3-STATE 3-STATE
Output polarity - - TRUE TRUE TRUE
Package body material - - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code - - SOP SSOP TSSOP
Encapsulate equivalent code - - SOP24,.4 SSOP24,.24 TSSOP24,.25
Package shape - - RECTANGULAR RECTANGULAR RECTANGULAR
Package form - - SMALL OUTLINE SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) - - NOT SPECIFIED NOT SPECIFIED 260
power supply - - 5 V 5 V 5 V
propagation delay (tpd) - - 0.25 ns 0.25 ns 0.25 ns
Certification status - - Not Qualified Not Qualified Not Qualified
Maximum seat height - - 2.65 mm 1.75 mm 1.2 mm
Maximum supply voltage (Vsup) - - 5.5 V 5.5 V 5.5 V
Minimum supply voltage (Vsup) - - 4 V 4 V 4 V
Nominal supply voltage (Vsup) - - 4.5 V 4.5 V 4.5 V
surface mount - - YES YES YES
technology - - CMOS CMOS CMOS
Temperature level - - INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal form - - GULL WING GULL WING GULL WING
Terminal pitch - - 1.27 mm 0.635 mm 0.65 mm
Terminal location - - DUAL DUAL DUAL
Maximum time at peak reflow temperature - - NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width - - 7.5 mm 3.9116 mm 4.4 mm
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