PI3B3253
3.3V, Dual 4:1 Mux/DeMux
NanoSwitch™
Features
• Near-Zero propagation delay
• 5Ω switches connect inputs to outputs
• Fast Switching Speed: 5.2ns max.
• Ultra Low Quiescent Power (0.2µA 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 173-mil wide plastic TSSOP (L)
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 (5Ω) with no
additional ground bounce noise or propagation delay.
Block Diagram
IA0
SW
Pin Configuration
IA1
IA2
IA3
IB0
IB1
IB2
IB3
EA
SW
SW
SW
SW
SW
SW
SW
1
2
3
4
5
16
V
CC
EB
S0
IB3
IB2
IB1
IB0
YB
EA
EB
S0
S1
SW
I
E
Y
S1
IA3
IA2
IA1
IA0
15
14
13
12
11
10
9
6
YA
GND
7
8
YA
YB
Truth Table
(1)
Enable
E
A
H
X
L
L
L
L
E
B
X
H
L
L
L
L
Select
S
1
X
X
L
L
H
H
S
0
X
X
L
H
L
H
Y
A
Hi-Z
X
I
A
0
I
A
1
I
A
2
I
A
3
Pin Description
Y
B
X
Hi-Z
I
B
0
I
B
1
I
B
2
I
B
3
Function
Disable A
Disable B
S1-0 = 0
S1-0 = 1
S1-0 = 2
S1-0 = 3
Pin Name
I
A
N
,
I
B
N
S
0-1
E
A
, E
B
Y
A
, Y
B
GND
V
CC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Note:
1.
H = High Voltage Level, L = Low Voltage Level
11-0009
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01/10/11
3.3V, Dual 4:1 Mux/DeMux
NanoSwitch™
PI3B3253
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 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.
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
=3.3V ±10%)
Parameters
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Switch On-Resistance
(3)
Test Conditions
(1)
Min.
2.0
–0.5
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0 ≤ I
N
, Y
N
≤ V
CC
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
Typ.
(2)
Max.
0.8
±1
±1
±1
–1.2
Units
V
µA
V
Ω
5
10
8
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
= 25°C 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.
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(1)
C
IN
C
OFF
C
ON
Description
Input Capacitance
I
A
/I
B
Capacitance, Switch Off
I
A
/I
B
Capacitance, Switch On
V
IN
= 0V
Test Conditions
Typ.
3.0
8.0
36.0
pF
Units
Notes:
1. This parameter is determined by device characterization but is not production tested.
11-0009
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01/10/11
3.3V, Dual 4:1 Mux/DeMux
NanoSwitch™
PI3B3253
Power Supply Characteristics
Parameters
I
CC
ΔI
CC
Description
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
µA
750
Units
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 inputs only); I and Y pins do not contribute to I
CC
.
Switching Characteristics over Operating Range
Parameters
t
IY
t
SY
t
PZH
t
PHZ
t
PLZ
Description
Propagation Delay
(1,2)
In to Yn
Bus Select Time, Sn to Yn
Bus Enable Time, E to Yn
Bus Disable Time, En to Y
C
L
= 50pF
R
L
= 500Ω
1
1
1
Test Conditions
Com.
Min.
Max.
0.25
4.0
3.8
5.2
ns
Units
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. 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.
11-0009
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01/10/11
3.3V, Dual 4:1 Mux/DeMux
NanoSwitch™
PI3B3253
Packaging Mechanical: 16-Pin QSOP (Q)
16
.008
0.20
MIN.
.150
.157
3.81
3.99
.008
.013
0.20
0.33
Guage Plane
.010
0.254
1
.189
.197
4.80
5.00
.008
0.203 REF
.053 1.35
.069 1.75
SEATING
PLANE
.004 0.101
.010 0.254
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.015 x 45° 0.38
Detail A
.007
.010
0.178
0.254
0.41 .016
1.27 .050
.228
.244
5.79
6.19
.025
BSC
0.635
.008
.012
0.203
0.305
X.XX DENOTES DIMENSIONS IN MILLIMETERS
X.XX
11-0009
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01/10/11
3.3V, Dual 4:1 Mux/DeMux
NanoSwitch™
PI3B3253
Packaging Mechanical: 16-Pin TSSOP (L)
16
.169
.177
4.3
4.5
1
.193
.201
4.9
5.1
.004
.008
.047
max.
1.20
SEATING
PLANE
0.45 .018
0.75 .030
.252
BSC
6.4
0.09
0.20
.0256
BSC
0.65
.007
.012
0.19
0.30
.002
.006
0.05
0.15
Ordering Information
Ordering Code
PI3B3253QE
PI3B3253LE
Package Code
Q
L
Package Desciption
Pb-free & Green, 16-pin QSOP
Pb-free & Green, 16-pin TSSOP
Notes:
•
Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
•
E = Pb-free & Green
• Adding an
X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
11-0009
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01/10/11
Embedded System
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