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Электронный компонент: PI3C16226B

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PS8457D 03/13/01
Product Description
Pericom Semiconductors PI3C series of bus switch circuits are
produced using the Companys advanced submicron CMOS
technology, achieving industry leading performance.
PI3C16226 is a 12-to 24-bit multiplexer/demultiplexer bus switch.
Industry leading advantages include a zero propagation delay of
500ps, resulting from 9-ohm channel resistance and low
I/O capacitance. A1 port demultiplexes to either 1B or 2B and the
switch is bidirectional.
Application
Provides Memory Module switching.
Logic Block Diagram
Pin Description
Product Features
R
ON
is 9-Ohm typical
Pulldown on B ports
Industrial Operation Temperature: 40C to +85C
Near Zero propagation delay
Switching speed: 4.5ns max.
Channel on capacitance: 9pF max. (3.3V operation)
V
CC
Operating Range: +2V to +3.6V
>100 MHz bandwidth
Package available: 40-pin BQSOP (B)
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PI3C16226
3.3V, High-Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
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12B2
12A1
1A1
SEL
12B1
1B2
1B1
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SEL
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40-Pin
B
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PS8457D 03/13/01
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PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
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 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.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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.
Capacitance
(T
A
= 25C f = 1 MHz)
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.3V 10%)
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PS8457D 03/13/01
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PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
PI3C16226 Switching Characteristics Over Operating Range
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for 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
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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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PS8457D 03/13/01
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PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus 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
40-Pin BQSOP (B) Package
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Notes:
1. Controlling dimensions in millimeters
2. Ref.: JEDEC MO - 154 BB
X.XX
X.XX DENOTES DIMENSION IN MILLIMETERS