1
PS8161C 02/04/00
BE
A
B
0
A
0
A
1
B
1
B
2
A
2
A
3
B
3
B
4
A
4
GND
V
CC
B
9
A
9
A
8
B
8
B
7
A
7
A
6
B
6
B
5
A
5
BE
B
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Product Description
Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry performance.
The PI3C3384, and PI3C32384 are 2.5V or 3.3Volt, high bandwidth
10-bit, 2-port bus switches 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. Two bus enable signals are provided, one for each of
the upper and lower five bits of the two 10-bit buses. The
PI3C32384 is designed with an internal 25
resistor reducing
noise reflection in high-speed applications.
Product Pin Configuration
Product Pin Description
Pin Name
Description
BE
A
, BE
B
Bus Enable Inputs (Active LOW)
A
0
- A
9
Bus A
B
0
- A
9
Bus B
GND
Ground
V
CC
Power
Product Features
Near-zero propagation delay
Low noise, 25
version (PI3C32384)
5
switches connect inputs to outputs (PI3C3384)
High Bandwidth (>400 MHz)
Permits Hot Insertion.
Rail-to-Rail, 3.3V or 2.5V Switching
5V I/O Tolerant
2.5V Supply Voltage Operation
Packages available:
24-pin 150-mil wide plastic QSOP (Q)
24-pin 173-mil wide plastic TSSOP (L)
Applications
High Bandwidth Data switching
Hot Docking
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Function
BE
A
BE
B
B
0-B4
B
5-B9
Disconnect
H
H
Hi-Z
Hi-Z
Connect
L
H
A
0-A4
Hi-Z
Connect
H
L
Hi-Z
A
5-A9
Connect
L
L
A
0-A4
A
5-A9
Truth Table
(1)
Logic Block Diagram
PI3C3384
PI3C32384 (25
)
2.5V/3.3V, High Bandwidth, Hot Insertion
10-Bit, 2-Port, Bus Switch
Note:
1. H = High Voltage Level, X = Dont Care,
L = Low Voltage Level, Hi-Z = High Impedance
24-Pin
L,Q
*-
)
)"
)
*"
*
)'
)#
*'
*#
*-
*
PI3C3384/PI3C32384 (25
)
2.5V/3.3V, High Bandwidth,
Hot Insertion, 10-Bit, 2-Port BusSwitch
2
PS8161C 02/04/00
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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 Input 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 dam-
age 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 opera-
tional 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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DC Electrical Characteristics
(Over Operating Range, T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Capacitance
(T
A
= 25C f = 1 MHz)
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PI3C3384/PI3C32384 (25
)
2.5V/3.3V, High Bandwidth,
Hot Insertion, 10-Bit, 2-Port BusSwitch
3
PS8161C 02/04/00
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PI3C3384/PI3C32384 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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Power Supply Characteristics
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PI3C3384/PI3C32384 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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PI3C3384/PI3C32384 (25
)
2.5V/3.3V, High Bandwidth,
Hot Insertion, 10-Bit, 2-Port BusSwitch
4
PS8161C 02/04/00
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4.0
2.0
0.0
0.0
1.0
2.0
3.0
4.0
5.0
V
OUT
, (V)
VIN, (V)
VCC =
3.3V
3.1V
2.9V
2.7V
2.5V
2.3V
3.6V
3.8V
3.4V
3.2V
3.0V
2.8V
Output Voltage vs. Input Voltage over Various Supply Voltages
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4
Ordering Information
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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