1
PS8406B 05/01/01
n
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F
N
E
B
A
N
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B
4
B
0
B
9
B
5
B
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n
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H
H
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1
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1
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1
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4
1
A
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Product Description
Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry leading performance.
The PI3C34X484 is a 3.3 Volt, high-bandwidth 40-bit, 2-port bus
switch designed with a low ON resistance 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. Eight bus
enable signals are provided, one for each of the upper and lower five
bits of the four 10-bit buses.
Product Features
Near-zero propagation delay
5-ohm switches connect inputs to outputs
High Bandwidth (>200 MHz)
Permits Hot Insertion.
Rail-to-Rail, 3.3V Switching
5V I/O Tolerant
Packages available:
96-pin Low Profile Fine Pitch Ball Grid Array (NB96)
Applications
High Bandwidth Data switching
Hot Docking
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Truth Table
(1)
Logic Block Diagram
3.3V, High Bandwidth, Hot Insertion
40-Bit, 2-Port, Bus Switch
Note:
1. H = High Voltage Level
X = Dont Care,
L = Low Voltage Level
Hi-Z = High Impedance
Product Pin Description
e
m
a
N
n
i
P
n
o
it
p
i
r
c
s
e
D
N
A
0
-
N
A
9
A
s
u
B
N
B
0
-
N
B
9
B
s
u
B
N
E
B
N
,
A
E
B
B
)
W
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it
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A
(
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b
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s
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B
N
D
N
G
d
n
u
o
r
G
N
V
CC
r
e
w
o
P
Note: N = 1 through 4 for each set of 10 bit buses
PI3C34X484
2
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PI3C34X484
3.3V, High Bandwidth, Hot Insertion,
40-Bit, 2-Port Bus Switch
PS8406B 05/01/01
Product Pinout by Name
e
m
a
N
d
a
P
ll
a
B
e
m
a
N
d
a
P
ll
a
B
e
m
a
N
d
a
P
ll
a
B
e
m
a
N
d
a
P
ll
a
B
1
A
0
2
A
2
A
0
2
E
3
A
0
2
J
4
A
0
2
N
1
B
0
3
A
2
B
0
3
E
3
B
0
3
J
4
B
0
3
N
1
A
1
1
A
2
A
1
1
E
3
A
1
1
J
4
A
1
1
N
1
B
1
2
B
2
B
1
2
F
3
B
1
2
K
4
B
1
2
P
1
A
2
2
C
2
A
2
2
G
3
A
2
2
L
4
A
2
2
R
1
B
2
1
B
2
B
2
1
F
3
B
2
1
K
4
B
2
1
P
1
A
3
1
C
2
A
3
1
G
3
A
3
1
L
4
A
3
1
R
1
B
3
2
D
2
B
3
2
H
3
B
3
2
M
4
B
3
2
T
1
A
4
3
D
2
A
4
3
H
3
A
4
3
M
4
A
4
3
T
1
B
4
1
D
2
B
4
1
H
3
B
4
1
M
4
B
4
1
T
1
A
5
4
D
2
A
5
4
H
3
A
5
4
M
4
A
5
4
T
1
B
5
6
D
2
B
5
6
H
3
B
5
6
M
4
B
5
6
T
1
A
6
6
C
2
A
6
6
G
3
A
6
6
L
4
A
6
6
R
1
B
6
5
D
2
B
6
5
H
3
B
6
5
M
4
B
6
5
T
1
A
7
5
C
2
A
7
5
G
3
A
7
5
L
4
A
7
5
R
1
B
7
6
B
2
B
7
6
F
3
B
7
6
K
4
B
7
6
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1
A
8
6
A
2
A
8
6
E
3
A
8
6
J
4
A
8
6
N
1
B
8
5
B
2
B
8
5
F
3
B
8
5
K
4
B
8
5
P
1
A
9
5
A
2
A
9
5
E
3
A
9
5
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4
A
9
5
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1
B
9
4
A
2
B
9
4
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3
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9
4
J
4
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9
4
N
1
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A
3
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2
E
B
A
3
F
3
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B
A
3
K
4
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B
A
3
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1
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B
B
4
C
2
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B
B
4
G
3
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B
B
4
L
4
E
B
B
4
R
1
V
C
C
4
B
2
V
C
C
4
F
3
V
C
C
4
K
4
V
C
C
4
P
1
D
N
G
3
C
2
D
N
G
3
G
3
D
N
G
3
L
4
D
N
G
3
R
PI3C34X484
3.3V, High Bandwidth, Hot Insertion,
40-Bit, 2-Port Bus Switch
3
PS8406B 05/01/01
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Product Pinout [LFBGA (N96) Package]
1
2
3
4
5
6
A
1
A
1
1
A
0
1
B
0
1
B
9
1
A
9
1
A
8
B
1
B
2
1
B
1
1
BE
A
1
V
CC
1
B
8
1
B
7
C
1
A
3
1
A
2
1
GND
1
BE
B
1
A
7
1
A
6
D
1
B
4
1
B
3
1
A
4
1
A
5
1
B
6
1
B
5
E
2
A
1
2
A
0
2
B
0
2
B
9
2
A
9
2
A
8
F
2
B
2
2
B
1
2
BE
A
2
V
CC
2
B
8
2
B
7
G
2
A
3
2
A
2
2
GND
2
BE
B
2
A
7
2
A
6
H
2
B
4
2
B
3
2
A
4
2
A
5
2
B
6
2
B
5
J
3
A
1
3
A
0
3
B
0
3
B
9
3
A
9
3
A
8
K
3
B
2
3
B
1
3
BE
A
3
V
CC
3
B
8
3
B
7
L
3
A
3
3
A
2
3
GND
3
BE
B
3
A
7
3
A
6
M
3
B
4
3
B
3
3
A
4
3
A
5
3
B
6
3
B
5
N
4
A
1
4
A
0
4
B
0
4
B
9
4
A
9
4
A
8
P
4
B
2
4
B
1
4
BE
A
4
V
CC
4
B
8
4
B
7
R
4
A
3
4
A
2
4
GND
4
BE
B
4
A
7
4
A
6
T
4
B
4
4
B
3
4
A
4
4
A
5
4
B
6
4
B
5
Product Pinout: 96-Pin LFBGA (NB) Package
4
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PI3C34X484
3.3V, High Bandwidth, Hot Insertion,
40-Bit, 2-Port Bus Switch
PS8406B 05/01/01
Storage Temperature ...................................................... 65C to +150C
Ambient Temperature with Power Applied .................... 40C to +85C
Supply Voltage to Ground Potential ................................ 0.5V to +4.6V
DC Input Voltage .............................................................. 0.5V to +4.6V
DC Output Current .........................................................................120mA
Power Dissipation .............................................................................. 0.5W
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional opera-
tion 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
maximum rating conditions for extended periods may
affect reliability.
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.)
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8
5
1
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Capacitance
(T
A
= 25C f = 1 MHz)
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1
PI3C34X484
3.3V, High Bandwidth, Hot Insertion,
40-Bit, 2-Port Bus Switch
5
PS8406B 05/01/01
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PI3C34X484 Switching Characteristics over 3.3V Operating Range
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
= 3.3V, +25C ambient.
3. Per TTL driven input (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.
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)
3
(
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5
7
A
Power Supply Characteristics
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=
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5
=
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2
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=
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6
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1
5
.
5
PI3C34X484 Switching Characteristics over 2.5V 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.
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