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PI5C3125 PI5C3126
4-Bit Bus Switch with Individual Enables
Features
* Near-Zero propagation delay * 5 switches connect inputs to outputs * * Direct bus connection when switches are ON Ultra Low Quiescent Power (0.1A Typical) - Ideally suited for notebook applications
Description
Pericom Semiconductor's PI5C3125 and PI5C3126 are 4-bit Bus Switches designed with four individual 5 bus switches with fast indiviual enables in an industry standard 74XX125/126 pinout. When enabled via the associated Bus Enable (BE) pin, the "A" pin is directly connected to the "B" pin for that particular gate. The bus switch introduces no additional propagation delay or additional ground bounce noise. The PI5C3125 device has active LOW enables, and the PI5C3126 has active HIGH enables.
* Packaging (Pb-free & Green available): - 14-pin 150-mil wide plastic SOIC (W) - 14-pin 173-mil wide plastic TSSOP (L) - 16-pin 150-mil wide plastic QSOP (Q)
PI5C3125 Block Diagram
A0 BE0 A1 BE1 A2 BE2 A3 BE3 B3 B2 B1 B0
PI5C3126 Block Diagram
A0 BE0 A1 BE1 A2 BE2 A3 BE3 B3 B2 B1 B0
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PI5C3125/3126 4-Bit Bus Switch w/Individual Enables PI5C3125 14-Pin Configuration
BE0 A0 B0 BE1 A1 B1 GND 1 14 2 13 3 14-Pin 12 4 L,W 11 5 10 6 9 7 8 Vcc BE3 A3 B3 BE2 A2 B2
PI5C3126 14-Pin Configuration
BE0 A0 B0 BE1 A1 B1 GND 1 14 2 13 3 14-Pin 12 4 W, L 11 5 10 6 9 7 8 Vcc BE3 A3 B3 BE2 A2 B2
PI5C3125 16-Pin Configuration
NC BE0 A0 B0 BE1 A1 B1 GND 1 16 2 15 3 16-Pin 14 4 Q 13 5 12 6 11 7 10 8 9 Vcc BE3 A3 B3 BE2 A2 B2 NC
PI5C3126 16-Pin Configuration
NC BE0 A0 B0 BE1 A1 B1 GND 1 16 2 15 3 16-Pin 14 4 Q 13 5 12 6 11 7 10 8 9 Vcc BE3 A3 B3 BE2 A2 B2 NC
Pin Description
Pin Name BEn BEn A3-A0 B3-B0 VCC GND Description Switch Enable (PI5C3125) Switch Enable (PI5C3126) Bus A Bus B Power Ground
Truth Table(1)
PI5C3125 PI5C3126 BEn BEn X(2) H L X L H An Hi-Z Hi-Z Bn Bn Hi-Z Hi-Z An VCC GND VCC VCC Function Disconnect Disconnect Connect
Notes: 1. H = High Voltage Level, L = Low Voltage Level, HI-Z = High Impedance, X = Don't Care 2. A pull-up resistor should be provided for power-up protection.
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.
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PI5C3125/3126 4-Bit Bus Switch w/Individual Enables DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5V 10%)
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, VCC = Min., VIN = 2.4V, VCC = 4V, VIN = 2.4V, ION = 48mA ION = 15mA ION = 15mA 16 Test Conditions(1) Min. 2.0 -0.5 0.8 1 1 1 -0.7 100 150 5 10 22 7 15 -1.2 V mA mV A Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., IIN = -18mA A (B) = 0 V, B (A) = VCC
Typ(2)
Max.
Units V
Capacitance (TA = 25C, f = 1 MHz)
Parameters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Test Conditions Typ. Max. 6 6 8 pF Units
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 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. 5. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4)
Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open BEn/BEn = GND Control Input Toggling 50% Duty Cycle 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); A and B 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 A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
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PI5C3125/3126 4-Bit Bus Switch w/Individual Enables Switching Characteristics over Operating Range
Parameters tPLH tPHL tPZH tPZL tPLZ tPHZ Description Propagation Delay(2,3) A to B, B to A Bus Enable Time Bus Disable Time CL = 50pF RL = 500 0.5 0.5 Conditions(1) Com. Min. Max. 0.25 5.4 4.7 ns Units
Notes: 1. See test circuit and wave forms. 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.
Packaging Mechanical: 14-Pin TSSOP (L)
14
0.004 0.09 0.008 0.20
0.45 0.018 0.75 0.030
0.169 0.177
4.3 4.5
1
0.193 0.201 4.90 5.10
0.240 0.264
6.1 6.7
0.047 1.20 max.
SEATING PLANE
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
0.0256 typical 0.65
0.007 0.012 0.19 0.30
0.002 0.05 0.006 0.15
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PI5C3125/3126 4-Bit Bus Switch w/Individual Enables Packaging Mechanical: 14-Pin SOIC (W)
14
.149 .157
3.78 3.99
.0099 .0196
0.25 x 45 0.50
0-8
.0075 .0098
0.41 .016 1.27 .050
0.19 0.25
1
.336 .344 8.55 8.75
.0155 .026 0.393 0.660
REF
.053 .068
1.35 1.75
.2284 .2440 5.80 6.20
SEATING PLANE
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.050 BSC 1.27
.013 .020 0.330 0.508
.0040 0.10 .0098 0.25
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
Detail A
.016 .035 0.41 0.89
.041 1.04 REF
0-6
.015 x 45 0.38
.053 1.35 .069 1.75
SEATING PLANE
0.41 .016 1.27 .050
Detail A
.007 0.178 .010 0.254
.025 BSC 0.635
.008 .012 0.203 0.305
.004 0.101 .010 0.254
.228 .244 5.79 6.19
X.XX DENOTES DIMENSIONS IN MILLIMETERS X.XX
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PI5C3125/3126 4-Bit Bus Switch w/Individual Enables Ordering Information
Ordering Code PI5C3125L PI5C3125LE PI5C3125W PI5C3125WE PI5C3125Q PI5C3125QE PI5C3126L PI5C3126LE PI5C3126W PI5C3126WE PI5C3126Q PI5C3126QE
Notes: 1. 2. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ X = Tape and reel
Package Type L L W W Q Q L L W W Q Q
Package Description 14-pin TSSOP Pb-free & Green, 14-pin TSSOP 14-pin SOIC Pb-free & Green, 14-pin SOIC 14-pin QSOP Pb-free & Green, 14-pin QSOP 14-pin TSSOP Pb-free & Green, 14-pin TSSOP 14-pin SOIC Pb-free & Green, 14-pin SOIC 14-pin QSOP Pb-free & Green, 14-pin QSOP
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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PS7013F 09/13/04

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