PI3C3305 PI3C3306 2.5V/3.3V, High Bandwidth, Hot Insertion, 2-Bit, 2-Port Bus Switch w/ Individual Enables Features Description • • • • • • • • Pericom Semiconductor’s PI3C3305 and PI3C3306 are 2.5V or 3.3 Volt, 2-bit bus switches designed with fast individual enables. 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. Near-Zero propagation delay 5Ω switches connect inputs to outputs High Bandwidth (>400 MHz) Rail-to-Rail, 3.3V or 2.5V Switching 5V I/O Tolerant 2.5V Supply Voltage Operation Permits Hot Insertion Packaging (Pb-free & Green Available): – 8-pin 173-mil wide plastic TSSOP – 8-pin 118-mil wide plastic MSOP The PI3C3306 device has active LOW enables, and the PI3C3305 has active HIGH enables. It is very useful in switching signals that have high bandwidth (>400 MHz). Applications • High Bandwidth Data Switching • Hot Docking PI3C3306 Block Diagram PI3C3305 Block Diagram B1 A1 B1 A1 BE1 BE1 A2 A2 B2 B2 BE2 BE2 PI3C3305 Pin Configuration BE1 A1 B1 GND PI3C3306 Pin Configuration BE1 A1 B1 GND VCC BE2 B2 A2 VCC BE2 B2 A2 Truth Table(1) Pin Description Pin Name Description BEn Switch Enable (PI3C3305) BEn Switch Enable (PI3C3306) A2-A1 Bus A B2-B1 Bus B V CC Power GND Ground PI3C3306 BEn PI3C3305 BEn X X(2) H L L H An VCC Function Hi-Z Hi-Z GND Disconnect Hi-Z Hi-Z V CC Disconnect V CC Connect Bn Bn An 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. 1 PS8417E 09/07/04 PI3C3305/PI3C3306 2.5V/3.3V, High Bandwidth, Hot Insertion, 2-Bit, 2-Port Bus Switch with Individual Enables 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 +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. DC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%) Parameters Test Conditions(1) Description Min. Typ.(2) Max. VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 IIH Input HIGH Current VCC = Max., VIN = VCC ±1 IIL Input LOW Current VCC = Max., VIN = GND ±1 IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ±1 VIK Clamp Diode Voltage VCC = Min., IIN = –18mA RON Switch On Resistance(4) Units V 0.8 –0.73 –1.2 VCC = Min., VIN = 0.0V, ION = 48mA or 60mA 5 7 VCC = Min., VIN = 2.4V, ION = 15mA 8 15 µA V Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) CIN Description Test Conditions Input Capacitance COFF A/B Capacitance, Switch Off CON A/B Capacitance, Switch On Typ. Units 3.5 VIN = 0V 5.0 pF 10.0 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 = 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 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. 2 PS8417E 09/07/04 PI3C3305/PI3C3306 2.5V/3.3V, High Bandwidth, Hot Insertion, 2-Bit, 2-Port Bus Switch with Individual Enables Power Supply Characteristics Parameters Test Conditions(1) Description ICC Quiescent Power Supply Current ΔICC Supply Current per Input HIGH VCC = Max. VIN = GND or VCC VCC = Max. 3.0V(3) VIN = Min. Typ.(2) Max. 260 500 Units µA 750 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, +25°C ambient. 3. Per driven input (control input only); A and B pins do not contribute to ∆ICC. Switching Characteristics over 3.3V Operating Range 3305/3306 Parameters Description Test Conditions(1) Com Min. tPLH tPHL Propagation Delay(2, 3) A to B, B to A CL = 50pF, RL = 500Ω tPZH tPZL Bus Enable Time tPHZ tPLZ Bus Disable Time CL = 50pF, RL = 500Ω, R = 500Ω Units Max. 0.25 1.5 6.5 1.5 5.5 ns Switching Characteristics over 2.5V Operating Range 3305/3306 Parameters Description Test Conditions(1) Com Min. tPLH tPHL Propagation Delay(2, 3) A to B, B to A CL = 50pF, RL = 500Ω tPZH tPZL Bus Enable Time tPHZ tPLZ Bus Disable Time CL = 50pF, RL = 500Ω, R = 500Ω Units Max. 0.25 1.5 9.8 1.5 8.3 ns 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. 3 PS8417E 09/07/04 PI3C3305/PI3C3306 2.5V/3.3V, High Bandwidth, Hot Insertion, 2-Bit, 2-Port Bus Switch with Individual Enables VOUT, (V) 4.0 VCC = 3.3V 3.1V 2.9V 2.7V 2.5V 3.8V 3.6V 3.4V 3.2V 3.0V 2.3V 2.8V 2.0 0.0 0.0 1.0 3.0 2.0 4.0 5.0 VIN, (V) Output Voltage vs. Input Voltage over Various Supply Voltages Output Voltage vs. Input Voltage over Various Supply Voltages Application Information Logic Inputs The logic control inpus 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-toRail minimizes power consumption. Power-Supply Sequencing Proper power-supply sequencing is advised for all CMOS devices. It is recommended to always apply VCC before applying signals to the input/output or control pins. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd 4 PS8417E 09/07/04 PI3C3305/PI3C3306 2.5V/3.3V, High Bandwidth, Hot Insertion, 2-Bit, 2-Port Bus Switch with Individual Enables Packaging Mechanical: 8-Pin TSSOP (L) Packaging Mechanical: 8-Pin MSOP (U) .003 .012 0.07 0.30 15˚ Max. .003 .012 0.07 0.30 Gauge Plane .010 0.25 .016 .028 0.40 0.70 15˚ Max. .037 0.95 REF 0˚- 6˚ Detail A .112 2.85 .120 3.05 Detail A 15˚ MAX .114 2.90 .122 3.10 15˚ MAX .114 2.90 .122 3.10 5 PS8417E 09/07/04 PI3C3305/PI3C3306 2.5V/3.3V, High Bandwidth, Hot Insertion, 2-Bit, 2-Port Bus Switch with Individual Enables Ordering Information Ordering Code Package Code Description PI3C3305L L 8-pin 173-mil wide plastic TSSOP PI3C3305U U 8-pin 118-mil wide plastic MSOP PI3C3305UE U Pb-free & Green 8-pin 118-mil wide plastic MSOP PI3C3306L L 8-pin 173-mil wide plastic TSSOP PI3C3306LE L Pb-free & Green 8-pin 173-mil wide plastic TSSOP PI3C3306U U 8-pin 118-mil wide plastic MSOP 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 6 PS8417E 09/07/04