1
PS8147G 09/09/04
PI3B3253
3.3V, Dual 4:1
Mux/DeMux NanoSwitch
TM
Features
Near-Zero propagation delay
5 switches connect inputs to outputs
Fast Switching Speed: 5.2ns max.
Ultra Low Quiescent Power (0.2A typical)
Ideally suited for notebook applications
Pin compatible with 74 series 253 logic devices
Packaging (Pb-free & Green available):
16-pin 150-mil wide plastic QSOP (Q)
16-pin 150-mil wide plastic SOIC (W)
16-pin 173-mil wide plastic TSSOP (L)
Block Diagram
Truth Table
(1)
Enable
Select
Y
A
Y
B
Function
E
A
E
B
S
1
S
0
H
X
X
X
Hi-Z
X
Disable A
X
H
X
X
X
Hi-Z
Disable B
L
L
L
L
I
A
0
I
B
0
S1-0 = 0
L
L
L
H
I
A
1
I
B
1
S1-0 = 1
L
L
H
L
I
A
2
I
B
2
S1-0 = 2
L
L
H
H
I
A
3
I
B
3
S1-0 = 3
Description
Pericom Semiconductor's PI3B3253 is a 3.3V, Dual4:1 Multi-
plexer/ Demultiplexer with Hi-Z outputs that is pinout compatible
with the PI74FCT253T, 74F253, and 74ALS/AS/LS 253. Inputs
can be connected to outputs with low On-Resistance (5) with no
additional ground bounce noise or propagation delay.
Pin Configuration
Pin Description
Pin Name
Description
I
A
N
,
I
B
N
Data Inputs
S
0-1
Select Inputs
E
A
, E
B
Enable
Y
A
, Y
B
Data Outputs
GND
Ground
V
CC
Power
Note:
1. H = High Voltage Level, L = Low Voltage Level
V
CC
EA
1
EB
S1
2
S0
IA3
3
IB3
IA2
4
IB2
IA1
5
16
IB1
IA0
6
15
IB0
YA
7
14
YB
8
13
12
GND
11
10
9
I
Y
E
SW
IA0
EA
EB
S0
S1
IA1
IA2
IA3
IB0
IB1
IB2
IB3
YA
YB
SW
SW
SW
SW
SW
SW
SW
SW
2
PS8147G 09/09/04
PI3B3253
3.3V, Dual 4:1 Mux/DeMux NanoSwitch
TM
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(4)
Description
Test Conditions
Typ.
Units
C
IN
Input Capacitance
V
IN
= 0V
3.0
pF
C
OFF
I
A
/I
B
Capacitance, Switch Off
8.0
C
ON
I
A
/I
B
Capacitance, Switch On
36.0
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
=3.3V 10%)
Parameters
Description
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Units
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
V
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
A
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
1
I
OZH
High Impedance Output Current
0 I
N
, Y
N
V
CC
1
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
1.2
V
R
ON
Switch On-Resistance
(3)
V
CC
= Min., V
IN
= 0.0V,
I
ON
= 48mA or 64mA
5
8
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
10
17
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. Measured by the voltage drop between I and Y pin at indicated current through the switch. On-Resistance is determined by the lower of the
voltages on the two (I,Y) pins.
4. This parameter is determined by device characterization but is not production tested.
Storage Temperature .....................................................................65C to +150C
Ambient Temperature with Power Applied ....................................40C to +85C
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 de-
vice. This is a stress rating only and functional op-
eration 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.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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PS8147G 09/09/04
PI3B3253
3.3V, Dual 4:1 Mux/DeMux NanoSwitch
TM
Power Supply Characteristics
Parameters
Description
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Units
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND
or V
CC
0.1
3.0
A
I
CC
Supply Current per Input
@ TTL HIGH
V
CC
= Max.
V
IN
= 3.0V
(3)
750
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); I and Y pins do not contribute to I
CC
.
Switching Characteristics over Operating Range
Parameters
Description
Test Conditions
(1)
Com.
Units
Min.
Max.
t
IY
Propagation Delay
(2,3)
In to Yn
C
L
= 50pF
R
L
= 500
0.25
ns
t
SY
Bus Select Time, Sn to Yn
1
4.0
t
PZH
Bus Enable Time, E to Yn
1
3.8
t
PHZ
t
PLZ
Bus Disable Time, En to Y
1
5.2
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 registered trademark of Nippon Motorola, Ltd
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PS8147G 09/09/04
PI3B3253
3.3V, Dual 4:1 Mux/DeMux NanoSwitch
TM
.189
.197
.053
.069
.004
.010
SEATING
PLANE
.025
BSC
.007
.010
.228
.244
1
16
.150
.157
.016
.050
X.XX
X.XX
DENOTES DIMENSIONS IN MILLIMETERS
0.635
4.80
5.00
1.35
1.75
5.79
6.19
0.101
0.254
.008
.012
0.203
0.305
3.81
3.99
0.178
0.254
0.38
0.41
1.27
.008
0.203
.015 x 45
REF
Detail A
Detail A
.008
0.20
MIN.
Guage Plane
.010
0.254
.041
1.04
REF
.016
.035
0.41
0.89
0-6
.008
.013
0.20
0.33
Packaging Mechanical: 16-Pin QSOP (Q)
Packaging Mechanical: 16-Pin SOIC (W)
SEATING PLANE
.050
BSC
1
16
0-8
.149
.157
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
3.78
3.99
.386
.393
9.80
10.00
1.27
.053
.068
1.35
1.75
.2284
.2440
5.80
6.20
.0040
.0098
0.10
0.25
.013
.020
.0155
.0260
0.330
0.508
0.393
0.660
.0075
.0098
0.25
0.50
.0099
.0196
x 45
0.19
0.25
.016
.050
0.41
1.27
REF
5
PS8147G 09/09/04
PI3B3253
3.3V, Dual 4:1 Mux/DeMux NanoSwitch
TM
Packaging Mechanical: 16-Pin TSSOP (L)
.193
.201
.047
max.
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.252
BSC
1
16
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.4
0.45
0.75
0.09
0.20
4.3
4.5
1.20
4.9
5.1
0.65
0.19
0.30
.007
.012
Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
Ordering Information
Ordering Code
Package Code
Package Desciption
PI3B3253Q
Q
16-pin QSOP
PI3B3253QE
Q
Pb-free & Green, 16-pin QSOP
PI3B3253W
W
16-pin SOIC
PI3B3253WE
W
Pb-free & Green, 16-pin SOIC
PI3B3253L
L
16-pin TSSOP
PI3B3253LE
L
Pb-free & Green, 16-pin TSSOP
Notes:
1. Thermal Characteristics can be found on the web at www.pericom.com/packaging/
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