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FSTU3125MTC Datasheet

  • FSTU3125MTC

  • 4-Bit Bus Switch with −2V Undershoot Protection

  • 139.51KB

  • 7页

  • FAIRCHILD

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FSTU3125 4-Bit Bus Switch with
鈭?V
Undershoot Protection
June 2001
Revised August 2001
FSTU3125
4-Bit Bus Switch with
鈭?/div>
2V Undershoot Protection
General Description
The Fairchild Switch FSTU3125 provides four high-speed
CMOS TTL-compatible bus switches. The low On Resis-
tance of the switch allows inputs to be connected to out-
puts without adding propagation delay or generating
additional ground bounce noise. The A and B Ports are
protected against undershoot to support an extended
range to 2.0V below ground. Fairchild鈥檚 integrated Under-
shoot Hardened Circuit (UHC
铮?/div>
) senses undershoot at the
I/O and responds by preventing voltage differentials from
developing and turning the switch on.
The device is organized as four 1-bit switches with sepa-
rate OE inputs. 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 a high-impedance state exists
between the two ports.
Features
s
Undershoot hardened to
鈭?/div>
2V (A and B Ports)
s
4
鈩?/div>
switch connection between two ports
s
Minimal propagation delay through the switch
s
Low l
CC
s
Zero bounce in flow-through mode
s
Control inputs compatible with TTL level
s
See application notes AN-5008 and AN-5021 for details
on undershoot
Ordering Code:
Order Number
FSTU3125M
FSTU3125QSC
FSTU3125MTC
Package Number
M14A
MQA16
MTC14
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
14-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 鈥淴鈥?to the ordering code.
Connection Diagrams
Pin Assignment for SOIC and TSSOP
Pin Descriptions
Pin Name
OE
1
, OE
2
, OE
3
, OE
4
1A, 2A, 3A, 4A
1B, 2B, 3B, 4B
NC
Description
Bus Switch Enables
Bus A
Bus B
Not Connected
Truth Table
Inputs
OE
Pin Assignment for QSOP
L
H
Inputs/Outputs
A,B
A
=
B
Z
漏 2001 Fairchild Semiconductor Corporation
DS500449
www.fairchildsemi.com

FSTU3125MTC 产品属性

  • Fairchild Semiconductor

  • CMOS

  • FST

  • 4

  • 11 Ohms

  • 0.25 ns

  • 5.5 V

  • 4 V

  • + 85 C

  • - 40 C

  • TSSOP-14

  • Rail

  • Bus Switch

  • 128 mA

  • SMD/SMT

  • 4

  • 4

  • 5 V

  • 1 x 1:1

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