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PI3C3125 PI3C3126
2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit, 2-Port Bus Switch with Individual Enables
Product Description
Pericom Semiconductors PI3C series of logic circuits are produced using the Companys advanced sub micron CMOS technology, achieving industry leading speed grades.
Product Features
Near zero propagation delay 5 switches connect inputs to outputs High Bandwidth (>400 MHz) Rail-to-Rail, or 2.5V or 3.3V Switching 5V I/O Tolerant 2.5V Supply Voltage Operation Permits Hot Insertion Packages available: 14-pin 150 mil wide plastic SOIC (W) 14-pin 170 mil wide plastic TSSOP(L) 16-pin 150 mil wide plastic QSOP (Q)
The PI3C3125A and PI3C3126A are 2.5V or 3.3 Volt, 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 PI3C3125 device has active LOW enables, and the PI3C3126A has active HIGH enables. It is very useful in switching signals that have high bandwidth (>400 MHz).
Applications
High Bandwidth Data Switching Hot Docking
PI3C3125 Logic Block Diagram
A0 BE0 A1 BE1 A2 BE2 A3 BE3 B3 B2 B1 B0
PI3C3126 Logic Block Diagram
A0 BE0 A1 BE1 A2 BE2 A3 BE3 B3 B2 B1 B0
1
PS8153B
12/10/99
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3125/PI3C3126 2.5V/3.3V, High Bandwidth, Hot Insertion, 4-Bit, 2-Port 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 +4.6V Supply Voltage to Ground Potential (Outputs & D/O Only) .... 0.5V to +4.6V DC Input Voltage ..................................................................... 0.5V to +5.5V 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.
PI3C3125 14-Pin Configuration
BE0 A0 B0 BE1 A1 B1 GND 1 14 2 13 3 14-PIN 12 14-Pin 4 L,W 11 W14 5 10 6 9 7 8 Vcc BE3 A3 B3 BE2 A2 B2
PI3C3126 14-Pin Configuration
BE0 A0 B0 BE1 A1 B1 GND 1 14 2 13 3 14-PIN 12 14-Pin 4 W14 11 L,W 5 10 6 9 7 8 Vcc BE3 A3 B3 BE2 A2 B2
PI3C3125 16-Pin Configuration
NC BE0 A0 B0 BE1 A1 B1 GND 1 16 2 15 3 16-PIN 14 4 16-Pin 13 Q16 Q 5 12 6 11 7 10 8 9 Vcc BE3 A3 B3 BE2 A2 B2 NC
PI3C3126 16-Pin Configuration
NC BE0 A0 B0 BE1 A1 B1 GND 1 16 2 15 3 16-PIN 14 4 16-Pin 13 Q16 Q 12 5 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 (PI3C3125) Switch Enable (PI3C3126) Bus A Bus B Power Ground
Truth Table(1)
PI3C3125 BEn X* H L PI3C3126 BEn X L H An Hi-Z Hi-Z Bn Bn Hi-Z Hi-Z An VCC GND VCC VCC Function Disconnect Disconnect Connect
Note: 1. H = High Voltage Level, L = Low Voltage Level HI-Z = High Impedance, X = Dont Care * A pull-up resistor should be provided for power-up protection.
2
PS8153B
12/10/99
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3125/PI3C3126 2.5V/3.3V, High Bandwidth, Hot Insertion, 4-Bit, 2-Port Bus Switch
DC Electrical Characteristics (Over Operating Range, TA = -40C to +85C, VCC = 3.3V 10%)
Parameters Description VIH VIL IIH IIL IOZH VIK RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND VCC = Min., IIN = -18mA VCC = Min., VIN = 0.0V, ION = 48mA or 60mA VCC = Min., VIN = 2.4V, ION = 15mA -0.73 5 8 Min. 2.0 -0.5 0.8 1 1 1 -1.2 7 15 V A Typ.(2) Max. Units V
High Impedance Output Current 0 A, B VCC Clamp Diode Voltage Switch On Resistance(4)
Capacitance (TA = 25C, f = 1 MHz)
Parameters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On Test Conditions VIN = 0V VIN = 0V VIN = 0V Typ. 3.5 5.0 10.0 Units pF
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 = 3.3V, 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 Description ICC ICC Quiescent Power Supply Current Supply Current per Input HIGH Test Conditions(1) VCC = Max. VCC = Max. VIN = GND or VCC VIN = 3.0V(3) Min. Typ.(2) Max. 260 500 A 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 VCC = 3.3V, +25C ambient. 3. Per driven input (control input only); A and B pins do not contribute to ICC.
3
PS8153B
12/10/99
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3125/PI3C3126 2.5V/3.3V, High Bandwidth, Hot Insertion, 4-Bit, 2-Port Bus Switch
PI3C3125/PI3C3126 Switching Characteristics over 3.3V Operating Range
PI3C3125/PI3C3126 Com. Min. Max. 0.25 1.5 1.5 6.5 5.5 ns
Parameters Description t PLH t PHL tPZH tPZL tPHZ tPLZ
Conditions(1)
Units
Propagation Delay(2,3) CL = 50 pF, A to B, B to A RL = 500 Bus Enable Time CL = 50 pF, Bus Disable Time RL = 500, R = 500
PI3C3125/PI3C3126 Switching Characteristics over 2.5V Operating Range
PI3C3125/PI3C3126 Com. Min. Max. 0.25 1.5 CL = 50 pF, RL = 500, R = 500 1.5 9.8 8.3 ns
Parameters Description t PLH tPHL t PZH t PZL t PHZ t PLZ Propagation A to B, B to A Bus Enable Time Delay(2,3)
Conditions(1) CL = 50 pF, RL = 500
Units
Bus Disable Time
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.
4
PS8153B
12/10/99
VOUT, (V)
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3125/PI3C3126 2.5V/3.3V, High Bandwidth, Hot Insertion, 4-Bit, 2-Port Bus Switch
4.0
VCC = 3.3V 3.1V 2.9V 2.7V 2.5V 2.3V
3.8V 3.6V 3.4V 3.2V 3.0V 2.8V
2.0
0.0 0.0
1.0
2.0 VIN, (V)
3.0
4.0
5.0
Output Voltage vs. Input Voltage over Various Supply Voltages Ordering Information
Part PI3C3125L PI3C3125W PI3C3125Q PI3C3126L PI3C3126W PI3C3126Q Pin - Package 14 - TSSO P (L) 14 - SO IC (W) 16 - Q SO P (Q ) 14 - TSSO P (L) 14 - SO IC (W) 16 - Q SO P (Q ) Te mpe rature 40C to +85C 40C to +85C 40C to +85C 40C to +85C 40C to +85C 40C to +85C
Output Voltage vs. Input Voltage over Various Supply Voltages
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
5
PS8153B 12/10/99

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