1
PS8456C 05/29/01
E
O
1
E
O
2
1
,
A
1
s
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I
B
2
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A
2
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L
L
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B
2
=
A
2
B
L
H
1
=
A
1
B
Z
H
L
Z
2
=
A
2
B
H
H
Z
Z
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PI3C16211
3.3V, High Bandwidth 24-Bit Bus Switch
Product Description
Pericom Semiconductor's PI3C series of bus switch circuits are
produced using the Company's advanced submicron CMOS
technology.
The PI3C16211 is a 24-bit bus switch designed with a low ON
resistance allowing inputs to be connected directly to outputs. This
device operates as a 24-bit or a 12-bit bus switch, which provides
high speed bus switching.
Product Features
Near-zero propagation delay
5 Ohm 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)
56-pin 300-mil wide plastic SSOP (V)
Logic Block Diagram
Product Pin Configuration
Truth Table
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
1OE
2A12
2A1
2B12
2B1
1A1
1B1
1A12
1B12
2OE
1
2
3
4
5
6
7
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
NC
1A1
1A2
1A3
1A4
1A5
1A6
GND
1A7
1A8
1A9
1A10
1A11
1A12
2A1
2A2
V
CC
2A3
GND
2A4
2A5
2A6
2A7
2A8
2A9
2A10
2A11
2A12
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
1B11
1B12
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
2B11
2B12
56-Pin
A,V
PI3C16211
3.3V, High Bandwidth 24-Bit Bus Switch
2
PS8456C 05/29/01
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Storage Temperature ............................................................... 65C to +150C
Ambient Temperature with Power Applied ................................. 40C to +85C
Supply Voltage to Ground Potential (Inputs & V
CC
Only) ............ 0.5V to +4.6V
Supply Voltage to Ground Potential (Outputs & D/O Only) .......... 0.5V to +4.6V
DC I/O Voltage ............................................................................. 0.5V to +5.5V
DC Output Current ................................................................................. 120 mA
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
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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8
PI3C16211
3.3V, High Bandwidth 24-Bit Bus Switch
3
PS8456C 05/29/01
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5
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5
PI3C16211 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
.
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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7
PI3C16211
3.3V, High Bandwidth 24-Bit Bus Switch
4
PS8456C 05/29/01
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Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
Ordering Information
.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
BSC
BSC
56-Pin TSSOP (A) Package
t
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T
A
1
1
2
6
1
C
3
I
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A
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6
5
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3
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the
supply voltage. For example, given a +3.3V supply, IN may be driven
low to 0V and high to 3.6V. Driving IN Rail-to-Rail
minimizes power
consumption.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS
devices. Always apply V
CC
before applying V
BIAS
and signals to
input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
56-Pin SSOP (V) Package
0.25
0.20
.025 BSC
0.635
.008
.008
.016
0-8
0.20
0.40
.110 2.79
.010
Gauge Plane
.291
.299
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
7.39
7.59
.396
.416
10.06
10.56
.02
.04
0.51
1.01
.015
.025
0.381
0.635
.720
.730
18.29
18.54
.008
.0135
0.20
0.34
1
56
x 45
Nom.
Max
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