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PDF FSTUD162450 Data sheet ( Hoja de datos )
| Número de pieza | FSTUD162450 | |
| Descripción | Configurable 4-Bit to 20-Bit Bus Switch with -2V Undershoot Protection and Selectable Level Shifting and 25 Series Resistors in Outputs | |
| Fabricantes | Fairchild Semiconductor | |
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April 2001
Revised August 2001
FSTUD162450
Configurable 4-Bit to 20-Bit Bus Switch with
−2V Undershoot Protection and Selectable Level Shifting
and 25Ω Series Resistors in Outputs
General Description
The Fairchild Universal Bus Switch FSTUD162450 pro-
vides 4-bit, 5-bit, 8-bit, 10-bit, 16-bit, 20-bit of high-speed
CMOS TTL-compatible bus switching. 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 FSTUD162450 is designed to allow “customer” config-
uration control of the enable connections. The device can
be organized as either a five 4-bit, four 5-bit, two 10-bit or
one 20-bit bus switch. Also available are 8-bit and 16-bit
enabled configurations (see Functional Description). The
device's bit configuration is controlled through select pin
logic. (see Truth Table). When OEx is LOW, Port Ax is con-
nected to Port Bx. When OEx is HIGH, the switch is OPEN.
The A and B Ports are protected against undershoot to
support an extended range to 2.0V below ground.
Fairchild's integrated Undershoot Hardened Circuit
(UHC) senses undershoot at the I/O and responds by
preventing voltage differentials from developing and turn-
ing the switch on.
Another innovative device feature is the addition of a level
shifting select pin, “S2”. When S2 is LOW, the device
behaves as a standard N-MOS switch. When S2 is HIGH, a
diode to VCC is integrated into the circuit allowing for level
shifting between 5V inputs and 3.3V outputs.
Features
s Undershoot protected to −2V (A and B Ports)
s Voltage level shifting
s 25Ω switch connection between two ports
s Minimal propagation delay through the switch
s Low lCC
s Zero bounce in flow-through mode
s Control inputs compatible with TTL level
s See Applications Notes AN-5008 and AN-5021
for UHC details
s Also packaged in plastic Fine-Pitch Ball Grid Array
(FBGA) (Preliminary)
Applications Note
Select pins S0, S1, S2 are intended to be used as static
user configurable control pins. The AC performance of
these pins has not been characterized or tested. Switching
of these select pins during system operation may tempo-
rarily disrupt output logic states and/or enable pin controls.
Ordering Code:
Order Number Package Number
Package Description
FSTUD162450GX
(Note 1)
BGA54A
Preliminary
54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
[Tape and Reel]
FSTUD162450MTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Note 1: BGA package available in Tape and Reel only.
UHC is a trademark of Fairchild Semiconductor Corporation.
© 2001 Fairchild Semiconductor Corporation DS500469
www.fairchildsemi.com
1 page  
Truth Tables (Continued)
4-Bit Configuration (S0 = S1 = H)
Inputs
OE1 OE2 OE3 OE4 OE5
LLLLL
L L L LH
L L LHL
L L LHH
L LHL L
L LHLH
L LHHL
L LHHH
LHL L L
LHLLH
LHLHL
LH LHH
LHHL L
L HH L H
L HHH L
L HHHH
HL L L L
HL L LH
HL LHL
H L LHH
HLHL L
HLHLH
H L HH L
H LHHH
HHL L L
HHL LH
HH L H L
HH LHH
HHHL L
HHH L H
HHHHL
HHHHH
1A1-4, 1B1-4
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Inputs/Outputs
1A5-8, 1B5-8
2A3-6, 2B3-6
2A7-10, 2B7-10
1A9-10, 1B9-10
2A1-2, 2B1-2
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
Z
Z
Z
Z
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
Z
Z
Z
Z
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
2Ax = 2Bx
Z
Z
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
2Ay = 2By
2Ay = 2By
Z
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
1Az = 1Bz
2Az = 2Bz
Z
5 www.fairchildsemi.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Package Number MTD56
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
11 www.fairchildsemi.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet FSTUD162450.PDF ] | |
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| FSTUD162450 | Configurable 4-Bit to 20-Bit Bus Switch with -2V Undershoot Protection and Selectable Level Shifting and 25 Series Resistors in Outputs | Fairchild Semiconductor |
| FSTUD162450GX | Configurable 4-Bit to 20-Bit Bus Switch with -2V Undershoot Protection and Selectable Level Shifting and 25 Series Resistors in Outputs | Fairchild Semiconductor |
| FSTUD162450MTD | Configurable 4-Bit to 20-Bit Bus Switch with -2V Undershoot Protection and Selectable Level Shifting and 25 Series Resistors in Outputs | Fairchild Semiconductor |
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