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PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
Features
* Near-Zero propagation delay * 5 switches connect inputs to outputs * Direct bus connection when switches are ON * 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 300-mil wide plastic SOIC (S) - 16-pin 150-mil wide plastic SOIC (W) - 16-pin 173-mil wide plastic TSSOP (L)
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 (5) with no additional ground bounce noise or propagation delay.
Block Diagram
IA0 IA1 IA2 IA3 IB0 IB1 IB2 IB3
Pin Configuration
EA S1 IA3 IA2 IA1 IA0 YA GND YA YB 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC EB S0 IB3 IB2 IB1 IB0 YB
EA EB S0 S1
Truth Table(1)
Enable EA EB H X X H L L L L L L L L Select S1 S0 X X X X L L L H H L H H YA Hi-Z X IA0 IA1 IA2 IA3 YB X Hi-Z IB0 IB1 IB2 IB3 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 VCC 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 ......................................................... -65C to +150C Ambient Temperature with Power Applied ........................ -40C to +85C Supply Voltage to Ground Potential (Inputs & VCC 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 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, TA = -40C to +85C, VCC = 5V 5%)
Parameters VIH VIL IIH IIL IOZH VIK IOS VH RON 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) VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA Test Conditions(1) Min. 2.0 -0.5 Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 IN, YN VCC VCC = Min., IIN = -18mA I (Y) = 0V, Y (I) = VCC 100
Typ.(2)
Max. Units 0.8 1 1 1 A V mA mV 7 15 V
-0.7 150 5 10
-1.2
Capacitance (TA = 25C, f = 1 MHz)
Parameters(5) Description Input Capacitance IA/IB Capacitance, Switch Off IA/IB Capacitance, Switch On VIN = 0V Test Conditions Typ. Max. 6 6 24 pF Units CIN COFF CON
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, TA = 25C 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. 5. 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 ICC ICC Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max. VCC = Max. VCC = Max., I and Y Pins Open BE = GND Control Input Toggling 50% Duty Cycle Test Conditions(1) VIN = GND or VCC VIN = 3.4V(3) Min. Typ.(2) 0.1 Max. 3.0 2.5 Units A mA
ICCD
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 VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V, control inputs only); I and Y pins do not contribute to ICC. 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
Parameters tIY tSY tPZH tPZL tPHZ tPLZ 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 CL = 50pF RL = 500 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 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
Detail A
.016 .035 0.41 0.89
.041 1.04 REF
0-6
.015 x 45 0.38
.008 0.203 REF
.053 1.35 .069 1.75
Detail A
.007 .010
0.178 0.254
SEATING PLANE
.004 0.101 .010 0.254
0.41 .016 1.27 .050
.025 BSC 0.635
.008 .012 0.203 0.305
.228 .244 5.79 6.19
X.XX DENOTES DIMENSIONS IN MILLIMETERS X.XX
Packaging Mechanical: 16-pin SOIC (S)
16
.2914 .2992
7.40 7.60
.010 0.254 x 45 .029 0.737
1
.398 10.10 .413 10.50
.020 0.508 .030 0.762
0-8
.0926 2.35 .1043 2.64
SEATING PLANE
.0091 0.23 .0125 0.32
0.41 .016 1.27 .050
.394 .419 10.00 10.65
.050 BSC 1.27
.013 .020 0.33 0.51
.0040 .0118
0.10 0.30
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
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PS7017C
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PI5C3253 Dual 4:1 Mux/DeMux Bus Switch Packaging Mechanical: 16-pin SOIC (W)
16
.149 .157
3.78 3.99
.0099 .0196
0.25 x 45 0.50
1
.386 .393 9.80 10.00
.0155 .0260 0.393 0.660 REF
0-8
0.41 1.27
.016 .050
.0075 .0098
0.19 0.25
.053 .068
1.35 1.75
SEATING PLANE
.2284 .2440 5.80 6.20
.050 BSC 1.27
.013 .020 0.330 0.508
.0040 0.10 .0098 0.25
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
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
0.09 0.20
0.45 .018 0.75 .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
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PI5C3253 Dual 4:1 Mux/DeMux Bus Switch Ordering Information
Ordering Code PI5C3253Q PI5C3253QE PI5C3253S PI5C3253SE PI5C3253W PI5C3253WE PI5C3253L PI5C3253LE Package Code Q Q S S W W L L Package Description 16-pin 150-mil wide QSOP Pb-free & Green, 16-pin 150-mil wide QSOP 16-pin 300-mil wide SOIC Pb-free & Green, 16-pin 300-mil wide SOIC 16-pin 150-mil wide SOIC Pb-free & Green, 16-pin 150-mil wide SOIC 16-pin 173-mil wide TSSOP Pb-free & Green, 16-pin 173-mil wide TSSOP
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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PS7017C 09/14/04

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