PI5C3401
6-Bit, 3-Port Bus Exchange Switch
Features:
• Near-Zero propagation delay
• 5-ohm switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2μA typical)
– Ideally suited for notebook applications
• Packaging (Pb-free & Green available):
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 300-mil wide plastic SOIC (S)
Description:
Pericom Semiconductor’s PI5C3401 is a 6-bit, 3-port bus exchange
switch designed with a low On-Resistance (5-ohm) allowing inputs
to be connected directly to outputs. The bus switch creates no
additional propagation delay or additional ground bounce noise.
The switches are turned OFF by S
0
= H and S
1
= H. The A bus
can be connected to B bus by S
0
= L and S
1
= L. The B bus can
be connected to C bus by S
0
= H and S
1
= L. The C bus can be
connected to A bus by S
0
= L and S
1
= H.
Block Diagram
B0
Pin Configuration
A0
C0
B5
A5
C5
S0
S1
DECODER
Pin Description
Pin Name
S
0
, S
1
Bus Direction
Bus A
Bus B
Bus C
No Connect
Ground
Power
Description
Truth Table
(1)
Function
Disconnect
Connect A-B
Connect B-C
Connect C-A
S0
H
L
H
L
S1
H
L
L
H
A0–5
Hi-Z
B0–5
Hi-Z
C0–5
B0–5
Hi-Z
A0–5
C0–5
Hi-Z
C0–5
Hi-Z
Hi-Z
B0–5
A0–5
A
0–5
B
0–5
C
0–5
NC
GND
V
CC
Note:
1. H = High Voltage Level, L = Low Voltage Level,
Hi-Z = High Impedance
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PS7020E
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PI5C3401
6-Bit, 3-Port Bus Exchange Switch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ..........................................................–65°C to +150°C
Ambient Temperature with Power Applied .........................–40°C to +85°C
Supply Voltage to Ground Potential .....................................–0.5V to +7.0V
DC Input Voltage ..................................................................–0.5V to +7.0V
DC Output Current............................................................................120 mA
Power Dissipation .................................................................................0.5W
Note:
Stresses greater than those listed under MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
these or any other conditions above those indicated in the
operational sections of this speci
fi
cation is not implied. Ex-
posure to absolute maximum rating conditions for extended
periods may affect reliability.
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ±5%)
Parameters
V
IH
V
IL
I
IH
I
IL
I
OZ
V
IK
I
OS
V
H
R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circuit Current
(3)
Input Hysteresis at Control Pins
Switch On-Resistance
(4)
V
CC
= Min., V
IN
= 0.0V, I
ON
= 48mA
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0
≤
A, B
≤
V
CC
V
CC
= Min., I
IN
= –18 mA
A (B) = 0V, B (A) = V
CC
100
150
5
10
7
15
–0.7
Min.
2.0
–0.5
0.8
±1
±1
±1
–1.2
V
mA
mV
Ω
μA
Typ
(2)
Max.
Units
V
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, T
A
= 25°C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. Measured by the voltage drop between A and B pin at indicated current through the switch. ON resistance is determined by the lower of the
voltages on the two (A,B) pins.
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(1)
C
IN
C
OFF
C
ON
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
V
IN
= 0V
Test Conditions
Typ.
Max.
6
6
8
pF
Units
Notes:
1. This parameter is determined by device characterization but is not production tested.
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PI5C3401
6-Bit, 3-Port Bus Exchange Switch
Power Supply Characteristics
Parameters
I
CC
ΔI
CC
Description
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
A and B Pins Open
BE = GND
Control Input Toggling
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND
or V
CC
V
IN
= 3.4V
(3)
Min.
Typ
(2)
0.1
Max.
3.0
2.5
Units
μA
mA
I
CCD
0.25
mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs only); A and B pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The
A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Switching Characteristics over Operating Range
Parameters
t
PLH
t
PHL
t
S
Description
Propagation Delay
(1,2)
Ax to Bx, Bx to Cx
or Cx to Ax
Bus Direction Time
S
X
to Ax or Bx or Cx
Conditions
Com.
Min.
Max.
0.25
1.5
6.5
Unit
C
L
= 50pF
R
L
= 500-ohm
ns
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The
time constant for the switch alone is of the order of 0.25ns for 50 pF load. Since this time constant is much smaller than the rise/fall times of
typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is
determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
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PI5C3401
6-Bit, 3-Port Bus Exchange Switch
Packaging Mechanical: 24-pin QSOP (Q)
24
.008
0.20
MIN.
.008
.013
0.20
0.33
Guage Plane
.150
.157
3.81
3.99
.010
0.254
1
.337
.344
8.56
8.74
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.033
0.84
.053
.069
1.35
1.75
.015 x 45˚
0.38
Detail A
.007
.010
SEATING
PLANE
.004 0.101
.010 0.254
.016
.050
0.406
1.27
.228
.244
5.79
6.20
0.178
0.254
.025
typical
0.635
.008 0.203
.012 0.305
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Packaging Mechanical: 24-pin SOIC (S)
24
.2914
.2992
7.40
7.60
.010
.029
0.254
x 45˚
0.737
1
.5985 15.20
.6141 15.60
.021 0.533
.031 0.787
0-8˚
0.41 .016
1.27 .050
.0926 2.35
.1043 2.65
SEATING
PLANE
.394
.419
10.00
10.65
.0091
.0125
0.23
0.32
.050
BSC
1.27
.013
.020
0.33
0.51
.0040
.0118
0.10
0.30
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
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PI5C3401
6-Bit, 3-Port Bus Exchange Switch
Ordering Information
Ordering Code
PI5C3401S
PI5C3401SE
PI5C3401Q
Package Code
S
S
Q
24-pin SOIC
Pb-free & Green, 24-pin SOIC
24-pin QSOP
Package Description
Notes:
•
Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
•
E = Pb-free & Green
• Adding an
X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
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PS7020E
05/02/07
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