1
PS8459D 03/13/01
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Product Features
R
ON
is 9 Ohm Typical
Pulldown on B Ports
Low Power: 1mW
Industrial Operation Temperature: 40C to 85C
Near Zero Propagation Delay
Switching Speed: 4.5ns max. (for 3.3V operation)
Channel ON capacitance: 9pF (typ.)
V
CC
Operating Range: +2 to +3.6V
>100 MHz Bandwidth
Packages: 56-Pin TSSOP
Product Description
Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology.
The PI3C16234 is a 16-bit to 32-bit mux/demux switch. Industry
leading advantages include almost zero propagation delay of 500ps
because of the 9ohm channel resistance and low I/O
capacitance. A1 port demultiplexes to either port B1 or B2 and the
switch is bidirectional.
Application
Private Memory Module Switching
PI3C16234
3.3V, High Bandwidth, 16-Bit to 32-Bit
Mux/Demux BusSwitch
Logic Block Diagram
Product Pin Configuration
Function Table
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2
Note:
n = 116
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1B1
2B1
2A1
3B1
4B1
4A1
5B1
6B1
6A1
7B1
8B1
8A1
9B1
10B1
10A1
11B1
12B1
12A1
13B1
14B1
14A1
16A1
SEL
15B1
16B1
NC
V
CC
11B2
NC
16B2
15B2
15A1
14B2
13B2
13A1
11A1
10B2
9B2
9A1
8B2
7B2
7A1
6B2
5B2
5A1
GND
4B2
3B2
3A1
2B2
1B2
1A1
V
CC
GND
12B2
56-Pin
A
16
B
1
16
A
1
1
A
1
16
B
2
1
B
2
SEL
1
B
1
2
PS8459D 03/13/01
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PI3C16234
3.3V, High Bandwidth, 16-Bit to 32-Bit Mux/Demux BusSwitch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ....................................................... 65C to +150C
Ambient Temperature with Power Applied ....................... 40C to +85C
Supply Voltage Range ....................................................... 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 conditions above those indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
DC Electrical Characteristics
(Over the Operating Range T
A
= 40C to 85C V
CC
= 3.3V 10%)
Parameters Description
Test Conditions
(1)
Min.
Typ
(1)
Max.
Units
V
IH
Input HIGH Voltage Guaranteed Logic HIGH Level
2.0
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.5
0.8
I
IH
Input HIGH Current
V
CC
= Max., V
IN
= V
CC
1
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
1
I
O
B-port Pulldown Current
V
CC
= Min., V
O
= V
CC
2.5
3.6
mA
SEL
= High for B1, SEL
= Low for B2
V
IK
Clamp Diode Voltage
V
CC =
Min
.,
I
IN
= 18mA
0.73
1.2
V
CC
= Min., V
IN
= 0.0V,
9
12
I
ON
= 48mA or 64mA
V
CC
= Min., V
IN
= 2.4V,
16
23
I
ON
=15mA
V
A
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(5)
Description
Test Conditions
Typ.
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
3.5
pF
C
ON
A/B Capacitance, Switch On
V
IN
= 0V
9.3
11
pF
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 pins 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.
R
ON
Switch On Resistance
(4)
3
PS8459D 03/13/01
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PI3C16234
3.3V, High Bandwidth, 16-Bit to 32-Bit Mux/Demux BusSwitch
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.
PI3C16234 Switching Characteristics over 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 0.5ns 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.
Power Supply Characteristics
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PS8459D 03/13/01
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3C16234
3.3V, High Bandwidth, 16-Bit to 32-Bit Mux/Demux BusSwitch
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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
BSC
BSC
Ordering Information
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