1
PS8454C 01/11/02
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PI3C16212
3.3V, High Bandwidth, 24-Bit Bus Exchange Switch
Product Description
Pericom Semiconductors PI3C series of bus switch circuits are
produced using the Companys advanced submicron CMOS
technology.
The PI3C16212 is 24-bit bus exchange switch designed with a low
ON resistance allowing inputs to be connected directly to outputs.
This device operates as a 24-bit bus switch or a 12-bit exchanger,
which provides data exchanging between the four signal ports via
the data select pins (S0-S2).
Product Features
Near-zero propagation delay
6
switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2mA typical)
Ideally suited for notebook applications
Industrial operating temperature: 40C to +85C
Packages available:
56-pin 240-mil wide thin plastic TSSOP (A)
Product Pin Configuration
1
1
A
1
1
B
1
2
A
1
2
B
FLOW CONTROL
ONE OF TWELVE CHANNELS
S
0
S
1
S
2
Function
S2
S1
S0
A1
A2
Disconnect
L
L
L
Z
Z
A1 to B1
L
L
H
B1
Z
A1 to B2
L
H
L
B2
Z
A2 to B1
L
H
H
Z
B1
A2 to B2
H
L
L
Z
B2
Disconnect
H
L
H
Z
Z
A1 to B1, A2 to B2
H
H
L
B1
B2
A1 to B2, A2 to B1
H
H
H
B2
B1
Logic Block Diagram
Product Pin Description
Pin Name
I/O
Description
S0-S2
I
Select Inputs
xAx
I/O
Bus A
xB
x
I/O
Bus B
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
Truth Table
1
2
3
4
5
6
7
GND
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
25
26
27
28
32
31
30
29
1 1
A
1 2
A
S
0
2 1
A
2 2
A
3 1
A
3 2
A
4 1
A
4 2
A
5 1
A
5 2
A
6 1
A
6 2
A
V
CC
7 1
A
7 2
A
8 1
A
GND
8 2
A
9 1
A
9 2
A
10 1
A
10 2
A
11
1
A
11
2
A
12 1
A
12 2
A
GND
1 1
B
1 2
B
S
1
2 1
B
2 2
B
3 1
B
3 2
B
4 1
B
4 2
B
5 1
B
5 2
B
6 1
B
6 2
B
7 1
B
7 2
B
8 1
B
GND
8 2
B
9 1
B
9 2
B
10 1
B
10 2
B
11
1
B
11
2
B
12 1
B
12 2
B
S
2
56-Pin
A
2
PS8454C 01/11/02
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PI3C16212
3.3V, High Bandwidth 24-Bit Bus Exchange Switch
Storage Temperature............................................................. 65C to +150C
Ambient Temperature with Power Applied .............................. 40C to +85C
Supply Voltage to Ground Potential ..........................................0.5V to +4.6V
DC I/O 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 condi-
tions above those indicated in the operational sec-
tions 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.)
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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3
PS8454C 01/11/02
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12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3C16212
3.3V, High Bandwidth 24-Bit Bus Exchange Switch
PI3C16212 Switching Characteristics Over 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.
Power Supply Characteristics
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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4
PS8454C 01/11/02
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12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3C16212
3.3V, High Bandwidth 24-Bit Bus Exchange Switch
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
Ordering Information
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56-Pin TSSOP (A) Package
.002
.006
SEATING PLANE
.007
.011
.004
.008
1
56
.236
.244
0.50
0.17
0.27
0.05
0.15
0.09
0.20
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.018
.030
0.45
0.75
.047
Max.
1.20
6.0
6.2
.547
.555
13.9
14.1
.319
8.1
.0197
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