PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
Features
• Near-Zero propagation delay
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• ESD Protection up to 2kV HBM
• 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)
– 16-pin 150-mil wide plastic SOIC (W)
Description
Pericom Semiconductor’s PI5C3253 is a Dual 4:1 Multiplexer/
demultiplexer with three-state 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
IA1
IA2
IA3
IB0
IB1
IB2
IB3
Pin Configuration
16
15
14
13
12
11
10
9
EA
EA
EB
S0
S1
S1
IA3
IA2
IA1
IA0
YA
GND
YA
YB
1
2
3
4
5
6
7
8
VCC
EB
S0
IB3
IB2
IB1
IB0
YB
Truth Table
(1)
Enable
EA
EB
H
X
X
H
L
L
L
L
L
L
L
L
Select
S
1
S
0
X
X
X
X
L
L
L
H
H
L
H
H
YA
Hi-Z
X
IA
0
IA
1
IA
2
IA
3
YB
X
Hi-Z
IB
0
IB
1
IB
2
IB
3
Function
Disable A
Disable B
S1-0 = 0
S1-0 = 1
S1-0 = 2
S1-0 = 3
Pin Description
Pin Name
IAn, IBn
S0–1
EA, EB
YA, YB
GND
V
CC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Note:
1. H = High Voltage Level, L = Low Voltage Level
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PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
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 (Inputs & V
CC
Only) .. –0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) –0.5V to +7.0V
DC Input Voltage ................................................................. –0.5V to +7.0V
DC Output Current............................................................................ 120mA
Power Dissipation .................................................................................0.5W
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent dam age 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 condi-
tions for extended periods may affect reliability.
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ±5%)
Parameters
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
I
OS
V
H
R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circuit Current
(3)
Input Hysteresis at Control Pins
Switch On-Resistance
(4)
V
CC
= Min., V
IN
= 0.0V, I
ON
= 48mA
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
Test Conditions
(1)
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
I (Y) = 0V, Y (I) = V
CC
100
150
5
10
7
15
–0.7
Min.
2.0
–0.5
0.8
±1
±1
±1
–1.2
V
mA
mV
Ω
μA
Typ.
(2)
Max. Units
V
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
= 5.0V, 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 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.
Max.
6
6
24
pF
Units
Notes:
1. This parameter is determined by device characterization but is not production tested.
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PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
Power Supply Characteristics
Parameters
I
CC
∆I
CC
Description
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
I and Y Pins Open
E
X
= GND
Control Input Toggling
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND
or V
CC
V
IN
= 3.4V
(3)
Min.
Typ.
(2)
0.1
Max.
3.0
2.5
Units
μA
mA
I
CCD
0.25
mA/
MHz
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
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs only); I and Y pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency.
The I and Y inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Switching Characteristics over Operating Range
Param-
eters
t
IY
t
SY
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(2,3)
In to Yn
Bus Select Time, Sn to Yn
Bus Enable Time, En to Yn
Bus Disable Time, En to Yn
C
L
= 50pF
R
L
= 500Ω
0.5
0.5
0.5
Conditions
(1)
Com.
Min.
Max.
0.25
6.6
6.0
6.0
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.
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PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
Test Circuit
Switch Position
Test
Disable LOW
Enable LOW
t
PD
Switch
Closed
Closed
Open
Definitions:
CL = Load Capacitance (includes jig and probe capacitance)
RT = Termination resistance (should be equal to ZOUT of
the pulse generator)
Enable and Disable Timing Diagram
Enable
Control
Input
t
PZL
Output
Normally
Low
t
PZH
Output
Normally
High
1.6V
Disable
Propagation Delay Diagram
3V
1.5V
0V
Same Phase
Input Translation
t
PLH
Output
3V
1.5V
t
PHL
V
OH
1.5V
t
PHL
1.5V
V
OL
t
PLH
3V
1.5V
0V
1.5V
0V
t
PLZ
Switch
3V
1.5V
0.3V
3V
VOL
VOH
0V
t
PZH
Switch
GND
1.5V
0V
0.3V
Opposite Phase
Input Transistion
1. Input Control Enable = Low Input Control Device = High
2. Pulse Generator total pulses
Rate ≤1.0 MHz; Z OUT ≤50-Ohms; tF, tR ≤2.5ns
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PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
Packaging Mechanical: 16-pin QSOP (Q)
DOCUMENT CONTROL NO.
PD - 1201
16
.008
0.20
MIN.
.008
.013
0.20
0.33
Guage Plane
REVISION: G
DATE: 11/07/07
.150
.157
3.81
3.99
.010
0.254
1
.189
.197
4.80
5.00
.008
0.203
REF
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.015 x 45° 0.38
1
.053 1.35
.069 1.75
Detail A
.007
0.178
.010
0.254
SEATING
PLANE
.004
0.101
.010
0.254
.228
.244
5.79
6.19
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335
• www.pericom.com
DESCRIPTION: 16-Pin 150-Mil Wide QSOP
PACKAGE CODE: Q
.025
BSC
0.635
.008
.012
0.203
0.305
X.XX DENOTES DIMENSIONS IN MILLIMETERS
X.XX
Note:
1) Controlling dimensions in inches.
2) Ref: JEDEC MO-137B/AB.
3) Dimensions do not include mold flash, protrusions or gate burrs
09-0120
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PS7017H
06/11/09
Electronics Design Contest
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