21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3305
PI3C3306
2.5V/3.3V, High Bandwidth, Hot Insertion,
2-Bit, 2-Port Bus Switch w/ Individual Enables
Product Description
Product Features
Near zero propagation delay
5 Ohm switches connect inputs to outputs
High Bandwidth (>400 MHz)
Rail-to-Rail, 3.3Vor 2.5V Switching
5V I/O Tolerant
2.5V Supply Voltage Operation
Permits Hot Insertion
Packages available:
8-pin 173-mil wide plastic TSSOP (L)
8-pin 118-mil wide plastic MSOP (U)
Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry leading speed grades.
The PI3C3305 and PI3C3306 are 2.5V or 3.3 Volt, 2-bit bus switches
designed with fast individual enables. When enabled via the
associated Bus Enable (BE) pin, the A pin is directly connected to
the B pin for that particular gate. The bus switch introduces no
additional propagation delay or additional ground bounce noise.
The PI3C3306 device has active LOW enables, and the PI3C3305 has
active HIGH enables. It is very useful in switching signals that have
high bandwidth (>400 MHz).
Applications
High Bandwidth Data Switching
Hot Docking
PI3C3305 Logic Block Diagram
A1
BE1
A2
BE2
B2
B1
PI3C3306 Logic Block Diagram
A1
BE1
A2
BE2
B2
B1
PI3C3305 Pin Configuration
BE1
A1
B1
GND
8-Pin
L,U
PI3C3306 Pin Configuration
V
CC
BE2
B2
A2
BE1
A1
B1
GND
8-Pin
L,U
V
CC
BE2
B2
A2
Product Pin Description
Pin Name
BEn
BEn
A2-A1
B2-B1
V
CC
GND
Description
Switch Enable (PI3C3305)
Switch Enable (PI3C3306)
Bus A
Bus B
Power
Ground
Truth Table
(1)
PI3C3306
BEn
X
H
L
PI3C3305
BEn
X*
L
H
An
Hi-Z
Hi-Z
Bn
Bn
Hi-Z
Hi-Z
An
V
CC
GND
V
CC
V
CC
Function
Disconnect
Disconnect
Connect
Notes:
1. H = High Voltage Level, L = Low Voltage Level
Hi-Z = High Impedance, X = Dont Care
* A pull-up resistor should be provided for power-up protection.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3305/PI3C3306
2.5V/3.3V, High Bandwidth, Hot Insertion,
2-Bit, 2-Port Bus Switch with Individual Enables
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature............................................................ 65°C to +150°C
Ambient Temperature with Power Applied ............................. 40°C to +85°C
Supply Voltage to Ground Potential ........................................ 0.5V to +4.6V
DC Input 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 de-
vice. This is a stress rating only and functional opera-
tion 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.
DC Electrical Characteristics
(Over Operating Range, T
A
= 40°C to +85°C, V
CC
= 3.3V ±10%)
Parameters Description
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
R
ON
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Clamp Diode Voltage
Switch On Resistance
(4)
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
V
CC
= Min., I
IN
= 18mA
V
CC
= Min., V
IN
= 0.0V, I
ON
= 48mA or 60mA
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
0.73
5
8
Min.
2.0
0.5
0.8
±1
±1
±1
1.2
7
15
V
Ohm
µA
Typ.
(2)
Max.
Units
V
High Impedance Output Current 0
≤
A, B
≤
V
CC
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(5)
C
IN
C
OFF
C
ON
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
V
IN
= 0V
Typ.
3.5
5.0
10.0
Units
pF
pF
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
= 25°C 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.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3305/PI3C3306
2.5V/3.3V, High Bandwidth, Hot Insertion,
2-Bit, 2-Port Bus Switch with Individual Enables
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
Quiescent Power
Supply Current
Supply Current per
Input HIGH
V
CC
= Max.
V
CC
= Max.
Test Conditions
(1)
V
IN
= GND or V
CC
V
IN
= 3.0V
(3)
Min.
Typ.
(2)
260
Max.
500
750
Units
µA
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, +25°C ambient.
3. Per driven input (control input only); A and B pins do not contribute to
∆I
CC
.
Switching Characteristics over 3.3V Operating Range
PI3C3305/PI3C3306
Com.
Parame te rs
t
PLH,
t
PHL
t
PZH,
t
PZL
t
PHZ,
t
PLZ
De s cription
Propagation Delay
(2,3)
A to B, B to A
Bus Enable Time
Bus Disable Time
Conditions
C
L
= 50pF, R
L
= 500
Ω
C
L
= 50pF, R
L
= 500
Ω,
R
= 500Ω
1.5
M in.
M ax.
0.25
6.5
5.5
ns
Units
1.5
Switching Characteristics over 2.5V Operating Range
PI3C3305/PI3C3306
Com.
Parame te rs
t
PLH,
t
PHL
t
PZH,
t
PZL
t
PHZ,
t
PLZ
De s cription
Propagation Delay
(2,3)
A to B, B to A
Bus Enable Time
Bus Disable Time
Conditions
C
L
= 50pF, R
L
= 500
Ω
C
L
= 50pF, R
L
= 500
Ω,
R
= 500Ω
1.5
M in.
M ax.
0.25
9.8
8.3
ns
Units
1.5
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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VOUT, (V)
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3305/PI3C3306
2.5V/3.3V, High Bandwidth, Hot Insertion,
2-Bit, 2-Port Bus Switch with Individual Enables
4.0
VCC = 3.3V
3.1V
2.9V
2.7V
2.5V
2.3V
3.8V
3.6V
3.4V
3.2V
3.0V
2.8V
2.0
0.0
0.0
1.0
2.0
VIN, (V)
3.0
4.0
5.0
Output Voltage vs. Input Voltage over Various Supply Voltages
Output Voltage vs. Input Voltage over Various Supply Voltages
Ordering Information
Part
PI3C3305L
PI3C3305U
PI3C3306L
PI3C3306U
Pin-Package
8- TSSOP (L)
8- MSOP (U)
8- TSSOP (L)
8- MSOP (U)
Width
173- mil
118- mil
173- mil
118- mil
Application Information
Logic Inputs
The logic control inpus 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-toRail minimizes power
consumption.
Power-Supply Sequencing
Proper power-supply sequencing is advised for all CMOS devices.
It is recommended to always apply V
CC
before applying signals to
the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3305/PI3C3306
2.5V/3.3V, High Bandwidth, Hot Insertion,
2-Bit, 2-Port Bus Switch with Individual Enables
8-Pin TSSOP (L) Package
8-Pin MSOP (U) Package
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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