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Product Description
Pericom Semiconductors PI3C series of bus switch circuits are
produced using the Companys advanced submicron CMOS
technology, achieving industry performance.
The PI3C16225 is a 12-bit to 24-bit, multiplexer/demultiplexer bus
switch that provides industry leading advantages such as almost
zero propagation delay of 500ps owing to 9ohm channel resistance
and low I/O capacitance. A1 port demultiplexes to either B1 or B2 port
and the switch is bidirectional.
Product Pin Configuration
Product Features
R
ON
is 9 Ohm typical
Pulldown on B ports
Near-Zero Propagation Delay
Industrial Operation Temperature 40C to +85C
Switching speed: 4.5ns max (for 3.3V operation)
Channel ON capacitance: 9pF typ.
V
CC
Operating Range: +2V to +3.6V
>100 MHz bandwidth
Packages Available:
56-pin TSSOP (A)
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Truth Table
Logic Block Diagram
PI3C16225
3.3V, High Bandwidth, Low Capacitance
12-Bit to 24-Bit Mux/Demux Bus Switch
(16292 Pinout)
Applications
Provides Memory Module Switching
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PS8458D 03/13/01
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PI3C16225
3.3V, High Bandwidth, Low Capacitance 12-Bit to
24-Bit Mux/Demux Bus Switch (16292 Pinout)
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 ............................................................................... 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 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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PS8458D 03/13/01
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PI3C16225
3.3V, High Bandwidth, Low Capacitance 12-Bit to 24-Bit
Mux/Demux Bus Switch (16292 Pinout)
PI3C16225 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 0.5ns for 25pF 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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PS8458D 03/13/01
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3C16225
3.3V, High Bandwidth, Low Capacitance 12-Bit to
24-Bit Mux/Demux Bus Switch (16292 Pinout)
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
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