21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3861
3.3V, 10-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 (0.1µA Typical)
– Ideally suited for notebook applications
• Packaging (Pb-free & Green available):
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 173-mil wide plastic TSSOP (L)
Description
Pericom’s Semiconductor’s PI3B3861 is a 10-bit, 3.3 volt, 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
A0
SW
B0
A9
SW
B9
SW
BE
A
B
NC
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A9
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
24-Pin
19
Q
18
17
16
15
14
13
Vcc
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B9
BE
Truth Table
(1)
Function
Disconnect
Connect
BE
H
L
A
0–9
Hi-Z
B
0–9
Product Pin Description
Pin Name
BE
A
0
–
9
B
0
–
9
GND
V
CC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3861
3.3V, 10-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 ex-
tended 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.
2.0
–0.5
0.8
±1
±1
±1
–1.2
8
17
Typ.
(2)
Max.
Units
V
V
µA
µA
µA
V
Ω
Ω
High Impedance Output Current 0
≤
A, B
≤
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 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.
4. This parameter is determined by device characterization but is not production tested.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3861
3.3V, 10-Bit, 2-Port,
NanoSwitch
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
Quiescent Power
Supply Current
Supply Current per
Input @ TTL 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
PI3B3861
Parame te rs
De s cription
Conditions
(2,3)
Com.
M in.
t
PLH
t
PH
L
t
PZH
t
PZL
t
PH
Z
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
C
L
= 50pF, R
L
= 500
Ω
C
L
= 50pF, R
L
= 500
Ω
C
L
= 50pF, R
L
= 500
Ω
1
1
M a x.
0.25
4.5
4.5
ns
Units
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.
Applications Information
Logic Inputs
The logic control inputs 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-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.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3861
3.3V, 10-Bit, 2-Port,
NanoSwitch
Packaging Mechanical: 24-pin QSOP (Q)
24
.008
0.20
MIN.
.008
.013
0.20
0.33
Guage Plane
.150
.157
3.81
3.99
.010
0.254
1
.337
.344
8.56
8.74
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.033
0.84
.053
.069
1.35
1.75
.015 x 45˚
0.38
Detail A
.007
.010
SEATING
PLANE
.004 0.101
.010 0.254
.016
.050
0.406
1.27
.228
.244
5.79
6.20
0.178
0.254
.025
typical
0.635
.008 0.203
.012 0.305
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Packaging Mechanical: 24-pin TSSOP (L)
24
.169
.177
4.3
4.5
.004
.008
0.09
0.20
1
.303
.311
7.7
7.9
0.45
0.75
.047
1.20
Max
.018
.030
SEATING
PLANE
.252
BSC
6.4
.0256
BSC
0.65
.007
.012
0.19
0.30
.002
.006
0.05
0.15
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
4
PS8148E
09/23/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3861
3.3V, 10-Bit, 2-Port,
NanoSwitch
Ordering Information
Ordering Code
PI3B3861Q
PI3B3861QE
PI3B3861L
PI3B3861LE
Package Code
Q
Q
L
L
Package Type
24-pin QSOP
Pb-free & Green, 24-pin QSOP
24-pin TSSOP
Pb-free & Green, 24-pin T SSOP
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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PS8148E
09/23/04
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