1
PS8198C 02/11/03
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24
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NC
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
GND
Vcc
BE
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
Pin Name
Description
BE
Bus Enable Input (Active LOW)
A09
Bus A
B09
Bus B
GND
Ground
V
CC
Power
Product Pin Configuration
24-Pin
L, Q
Product Pin Description
Function
BE
A09
Disconnect
H
Hi-Z
Connect
L
B09
Truth Table
(1)
Note:
H
= High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
Logic Block Diagram
Product Description
Pericom's Semiconductor's PI3C series of logic circuits are
produced using the Company's advanced submicron CMOS
technology, achieving industry leading performance.
The PI3C3861 is a 10-bit, 2.5V or 3.3 volt, 2-port bus switch
designed with a low ON-Resistance (5
) allowing inputs to be
connected directly to outputs. The bus switch creates no
additional propagational delay or additional ground bounce
noise. The switches are turned ON by the Bus Enable (BE) input
signal. This device is very userful in switching signals that have
high bandwidth (>400 MHz).
Product Features
Near zero propagation delay
5
switches connect inputs to outputs
High bandwidth (>400 MHz)
Rail-to-rail 2.5V or 3.3V switching
5V I/O Tolerant
2.5V Supply Voltage Operation
Permits Hot-Insertion
Available Packages:
24-pin 150 mil wide plastic QSOP (Q)
24-pin 173 mil wide plastic TSSOP (L)
High bandwidth data switching
Hot Docking
BE
A9
A0
B9
B0
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PI3C3861
2.5V/3.3V, High Bandwidth, Hot Insertion,
10-Bit, 2-Port, BusSwitch
Applications
2
PS8198C 02/11/03
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PI3C3861
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
DC Electrical Characteristics
(Over Operating Range, T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.5
0.8
I
IH
Input HIGH Current
V
CC
= Max., V
IN
= V
CC
1
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
1
A
I
OZH
High Impedance Output Current 0
A, B
V
CC
1
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
0.73
1.2
V
R
ON
Switch On Resistance
(4)
V
CC
= Min., V
IN
= 0.0V, I
ON
= 48mA
5
7
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
8
15
Storage Temperature .......................................................... 65C to +150C
Ambient Temperature with Power Applied ............................. 40C to +85C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ........ 0.5V to +4.6V
Supply Voltage to Ground Potential (Outputs & D/O Only) ..... 0.5V to +4.6V
DC Input Voltage .................................................................... 0.5V to +5.5V
DC Output Current ..............................................................................120mA
Power Dissipation ..................................................................................0.5W
Note:
Stresses greater than those listed under MAXIMUM
RATINGS 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
specification is not implied. Exposure to absolute maxi-
mum rating conditions for extended periods may affect
reliability.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(5)
Description
Test Conditions
Typ
Units
C
IN
Input Capacitance
V
IN
= 0V
3.5
C
OFF
A/B Capacitance, Switch Off
V
IN
= 0V
5.0
pF
C
ON
A/B Capacitance, Switch On
V
IN
= 0V
10.0
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, T
A
= 25C 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.
5. This parameter is determined by device characterization but is not production tested.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
V
3
PS8198C 02/11/03
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PI3C3861
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
V
CC
= Max.
V
IN
= GND or V
CC
260
500
Supply Current
I
CC
Supply Current per
V
CC
= Max.
V
IN
= 3.0V
(3)
750
Input @ TTL HIGH
1
6
8
3
C
3
I
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A
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B
,
x
B
o
t
x
A
C
L
R
,
F
p
0
5
=
L
0
0
5
=
5
2
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n
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x
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6
t
PHZ
t
PLZ
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A
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B
5
.
1
5
.
5
Notes:
1. For Max. or Min.conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25C ambient.
3. Per TTL driven input (control input 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 3.3V Operating Range
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. 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 50pF 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.
A
1
6
8
3
C
3
I
P
.
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C
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(
x
A
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t
x
B
,
x
B
o
t
x
A
C
L
R
,
F
p
0
5
=
L
0
0
5
=
5
2
.
0
s
n
t
PZH
t
PZL
e
m
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x
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1
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9
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PHZ
t
PLZ
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x
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B
5
.
1
3
.
8
Switching Characteristics over 2.5V Operating Range
4
PS8198C 02/11/03
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PI3C3861
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
4.0
2.0
0.0
0.0
1.0
2.0
3.0
4.0
5.0
V
OUT
, (V)
VIN, (V)
VCC =
3.3V
3.1V
2.9V
2.7V
2.5V
2.3V
3.6V
3.8V
3.4V
3.2V
3.0V
2.8V
Output Voltage vs. Input Voltage over Various Supply Voltages
Output Voltage vs. Input Voltage over Various Supply Voltages
5
PS8198C 02/11/03
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PI3C3861
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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4
Ordering Information
Packaging Mechanical: 24-pin TSSOP (package code L)
Packaging Mechanical: 24-pin QSOP (package code Q)
.303
.311
.047
1.20
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.252
BSC
1
24
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.4
0.45
0.75
0.09
0.20
4.3
4.5
7.7
7.9
0.65
0.19
0.30
.007
.012
Max
.337
.344
.053
.069
.004
.010
SEATING
PLANE
.025
typical
.007
.010
.228
.244
1
24
.150
.157
.016
.050
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
0.635
8.56
8.74
1.35
1.75
5.79
6.20
0.406
1.27
0.101
0.254
.008
.012
0.203
0.305
3.81
3.99
0.178
0.254
.033
0.84
0.38
.015 x 45
Detail A
Detail A
.008
0.20
MIN.
Guage Plane
.010
0.254
.041
1.04
REF
.016
.035
0.41
0.89
0-6
.008
.013
0.20
0.33
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