21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3245
3.3V, Hot Insertion
8-Bit, 2-Port,
NanoSwitch™
Features
• Near-Zero propagation delay
• 5-ohm switches connect inputs to outputs
• Fast Switching Speed - 4.5ns max.
• Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• TTL-compatible control of inputs levels
• Packaging (Pb-free & Green available):
– 20-pin QSOP (Q)
– 20-pin TSSOP (L)
– 20-pin SOIC (S)
Description
Pericom Semiconductor’s PI3B3245 is a 3.3V 8-bit, 2-port bus switch
designed with a low On-Resistance (5-ohm) 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.
Block Diagram
Pin Configuration
A
0
SW
B
0
NC
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
A
7
SW
B
7
SW
BE
A
B
BE
Truth Table
(1)
Function
Disconnect
Connect
BE
H
L
A
0–7
Hi-Z
B
0–7
Pin Description
Pin Name
BE
A0–7
B0–7
GND
V
CC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
Notes:
H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
1
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3245
3.3V, Hot Insertion
8-Bit, 2-Port,
NanoSwitch™
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 +4.6V
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 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 the 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
(3)
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 64mA
V
CC
= Min., V
IN
= 2.4V,I
ON
= 15mA
5
10
Min. Typ
(2)
2.0
–0.5
0.8
±1
±1
±1
–1.2
8
17
Max.
Units
V
V
µA
µA
µA
V
Ω
High Impedance Output Current 0
≤
I
N
, Y
N
≤
V
CC
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
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.
3.0
8.0
16.0
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. Measured by the voltage drop betweenAand B pin at indicated current through the switch. ON resistance is determined
by the lower of the voltages on the two (A,B) pins.
4. This parameter is determined by device characterization but is not production tested.
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PS8162F
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Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6 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-to-Rail® minimizes power consumption.
Power-Supply Sequencing and Hot-Plug Information
Proper power-supply sequencing is recommended for all CMOS devices. Always apply V
CC
and GND before applying signals to
input/output or control pins.
Rail-to-Rail is a registeredtrademark of Nippon Motorola, Ltd
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3245
3.3V, Hot Insertion
8-Bit, 2-Port,
NanoSwitch™
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
Quiescent Power
Supply Current
Supply Current per
Input HIGH
Test Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
IN
= GND or V
CC
V
IN
= 3.0V
(3)
Min.
Typ
(2)
0.1
Max.
3.0
750
Units
µA
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 TTL driven input (control input only); A and B pins do not contribute to I
CC
.
Switching Characteristics over Operating Range
Conditions
(1)
C
L
= 50pF
R
L
= 500Ω
C
L
= 50pF,
R
L
= 500Ω,
R
L
= 500Ω
PI3B3245
Com.
Min.
Max.
0.25
1.0
1.0
4.0
4.5
Parameters Description
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
Units
ns
ns
ns
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.
3
PS8162F
09/23/04
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3245
3.3V, Hot Insertion
8-Bit, 2-Port,
NanoSwitch™
Packaging Mechanical: 20-Pin QSOP (Q)
20
.008
0.20
MIN.
.150
.157
3.81
3.99
Guage Plane
.008
.013
0.20
0.33
.010
0.254
1
.337 8.56
.344 8.74
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.058
REF
1.47
.053 1.35
.069 1.75
SEATING
PLANE
.015 x 45˚
0.38
Detail A
.007
.010
.016
.050
0.41
1.27
0.178
0.254
.025
BSC
0.635
.004 0.101
.010 0.254
.008 0.203
.012 0.305
.228
.244
5.79
6.19
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Packaging Mechanical: 20-Pin TSSOP (L)
20
.169
.177
4.3
4.5
1
.252
.260
6.4
6.6
.004 0.09
.008 0.20
.047
1.20
Max
0.45
0.75
.018
.030
SEATING
PLANE
.238
.269
6.1
6.7
.0256
BSC
0.65
.007
.012
0.19
0.30
.002 0.05
.006 0.15
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
4
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PI3B3245
3.3V, Hot Insertion
8-Bit, 2-Port,
NanoSwitch™
Packaging Mechanical: 20-Pin SOIC(S)
20
.197
.220
5.00
5.60
1
.272
.295
6.90
7.50
.078
2.00
Max
SEATING
PLANE
.002
Min
0.050
.004
.009
0.09
0.25
0.55 .022
0.95 .037
.291
.322
7.40
8.20
.0256
BSC
0.65
.0098
Max.
0.25
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Ordering Information
Ordering Code
PI3B3245Q
PI3B3245QE
PI3B3245L
PI3B3245LE
PI3B3245S
PI3B3245SE
Package Code
Q
Q
L
L
S
S
Package Type
20-pin QSOP
Pb-free & Green, 20-pin QSOP
20-pin TSSOP
Pb-free & Green, 20-pin TSSOP
20-pin SOIC
Pb-free & Green, 20-pin SOIC
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
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09/23/04
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