FST34170MTD

© 2005 Fairchild Semiconductor Corporation DS500450 www.fairchildsemi.com
October 2000
Revised January 2005
FST34170 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch
FST34170
17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch
General Description
The Fairchild Switch FST34170 is a 17-bit to 34-bit high-
speed CMOS TTL-compatible multiplexer/demultiplexer
bus switch. The low on resistance of the switch allows
inputs to be connected to outputs without adding propaga-
tion delay or generating additional ground bounce noise.
The device can be used in applications where two buses
need to be addressed simultaneously. The FST34170 is
designed so that the A Port demultiplexes into B
1
or B
2
or
both.
Two select (SEL
1
, SEL
2
) inputs provide switch enable con-
trol.
Features
Slower Output Enable times prevent signal disruption
4 switch connection between two ports
Minimal propagation delay through the switch
Low l
CC
Zero bounce in flow-through mode
Control inputs compatible with TTL level
See Applications Note AN-5008 for details
Ordering Code:
Note 1: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Note 2: “_NL” indicates Pb-Free product (per JEDEC J-STD-020B). Device is available in Tape and Reel only.
UHC
is a trademark of Fairchild Semiconductor Corporation.
Order Number
Package
Number
Package Description
FST34170MTD
(Note 1)
MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
FST34170MTDX_NL
(Note 2)
MTD56 Pb-Free 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,
6.1mm Wide
www.fairchildsemi.com 2
FST34170
Logic Diagram
Truth Table
Connection Diagram
Pin Descriptions
Inputs
Function
SEL
1
SEL
2
LH x A x B
1
HL x A x B
2
LLx A x B
1
and x B
2
H H Switch Open
Pin Name Description
SEL
1
, SEL
2
Select Inputs
ABus A
B
1
, B
2
Bus B
3 www.fairchildsemi.com
FST34170
Absolute Maximum Ratings(Note 3) Recommended Operating
Conditions
(Note 6)
Note 3: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum rating.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Note 4: V
S
is the voltage observed/applied at either the A or B Ports across
the switch.
Note 5: The input and output negative voltage ratings may be exceeded if
the input and output diode current ratings are observed.
Note 6: Unused control inputs must be held HIGH or LOW. They may not
float.
DC Electrical Characteristics
Note 7: Typical values are at V
CC
5.0V and T
A
25 C
Note 8: Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of the
voltages on the two (A or B) pins.
Supply Voltage (V
CC
) 0.5V to 7.0V
DC Switch Voltage (V
S
) (Note 4) 0.5V to 7.0V
DC Input Control Pin Voltage
(V
IN
) (Note 5) 0.5V to 7.0V
DC Input Diode Current (l
IK
) V
IN
0V 50 mA
DC Output Current (I
OUT
)128 mA
DC V
CC
/GND Current (I
CC
/I
GND
) / 100 mA
Storage Temperature Range (T
STG
) 65 C to 150 C
Power Supply Operating (V
CC
) 4.0V to 5.5V
Input Voltage (V
IN
) 0V to 5.5V
Output Voltage (V
OUT
) 0V to 5.5V
Input Rise and Fall Time (t
r
, t
f
)
Switch Control Input 0nS/V to 5nS/V
Switch I/O 0nS/V to DC
Free Air Operating Temperature (T
A
) 40 C to 85 C
Symbol Parameter
T
A
40 C to 85 C
Units ConditionsV
CC
Min Typ Max
(V) (Note 7)
V
IK
Clamp Diode Voltage 4.5 1.2 V I
IN
18mA
V
IH
HIGH Level Input Voltage 4.0–5.5 2.0 V
V
IL
LOW Level Input Voltage 4.0–5.5 0.8 V
I
I
Input Leakage Current 5.5 1.0 A0 V
IN
5.5V
010AV
IN
5.5V
I
OZH
, I
OZL
OFF-STATE Leakage Current 5.5 1.0 A0 A, V
CC
, V
I
OZH
, I
OZL
OFF-STATE Leakage Current 5.5 1.0 A0 B, V
CC
, V
R
ON
Switch On Resistance 4.5 4 7 V
IN
0V, I
IN
64 mA
(Note 8) 4.5 4 7 V
IN
0V, I
IN
30 mA
4.5 8 14 V
IN
2.4V, I
IN
15 mA
4.0 11 20 V
IN
2.4V, I
IN
15 mA
I
CC
Quiescent Supply Current 5.5 3 AV
IN
V
CC
or GND, I
OUT
0
I
CC
Increase in I
CC
per Input 5.5 2.5 mA One input at 3.4V
Other inputs at V
CC
or GND

FST34170MTD

Mfr. #:
Manufacturer:
ON Semiconductor / Fairchild
Description:
Multiplexer Switch ICs Multi/Demultiplexer 17Bit to 34Bit
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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