PI3C3245 2.5V/3.3V, High Bandwidth, Hot Insertion 8-Bit, 2-Port, Bus Switch Features Description ÎÎNear-Zero propagation delay Pericom Semiconductor’s PI3C3245 is a 2.5 volt or 3.3 volt 8-bit, 2-port bus switch designed with a low On-Resistance (5-ohm) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BE) input signal. It is very useful in switching signals that have high bandwidth (>400 MHz). ÎÎ5-ohm switches connect inputs to outputs ÎÎHigh Bandwidth Operation (>400 MHz) ÎÎPermits Hot Insertion ÎÎ5V I/O Tolerant ÎÎRail-to-Rail 3.3V or 2.5V Switching ÎÎ2.5V Supply Voltage Operation ÎÎPackaging (Pb-free & Green): àà 20-pin 150 mil wide plastic QSOP (Q) Block Diagram Pin Configuration A0 B0 A7 B7 BE NC 1 20 VCC A0 2 19 BE A1 3 18 B0 A2 4 17 B1 A3 5 16 B2 A4 6 15 B3 A5 7 14 B4 A6 8 13 B5 A7 9 12 B6 10 11 B7 GND Truth Table(1) Pin Description Function BE A0-7 Pin Name Description Disconnect H Hi-Z BE Connect L B0-7 A0-7 Bus A Bus Enable Input (Active LOW) Note: H = High Voltage Level B0-7 Bus B L = Low Voltage Level Hi-Z = High Impedance GND Ground All trademarks are property of their respective owners. VCC 11-0112 1 Power www.pericom.com PS8162F 08/24/11 PI3C3245 2.5V/3.3V, High Bandwidth, Hot Insertion, 8-Bit, 2-Port, Bus Switch Absolute Maximum Ratings Parameter Min. Max. Units Storage Temperature -65 150 o C Ambient Temperature with Power Applied -40 85 o C Supply Voltage to Ground Potential (Inputs & VCC Only) -0.5 4.6 V Supply Voltage to Ground Potential (Outputs & D/O Only) -0.5 4.6 V DC Input Voltage -0.5 5.5 V DC Output Current - 120 mA Power Dissipation - 0.5 W Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%) Parameters Description Test Conditions(1) 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 (3) High Impedance Output Current 0 ≤ A, B ≤ VCC VIK Clamp Diode Voltage RON Switch On Resistance(4) Units V 0.8 V μA ±1 -0.73 -1.2 VCC = Min., VIN = 0.0V, ION = 48mA 5 7 VCC = Min, VIN = 2.4V, ION = 15mA 8 15 VCC = Min., IIN = –18 mA V Ω 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. Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) Description Test Conditions Typ Units CIN Input Capacitance VIN = 0V 3.5 pF COFF A/B Capacitance, Switch Off VIN = 0V 5.0 pF CON A/B Capacitance, Switch On VIN = 0V 10.0 pF Notes: 1. This parameter is determined by device characterization but is not production tested. All trademarks are property of their respective owners. 11-0112 2 www.pericom.com PS8162F 08/24/11 PI3C3245 2.5V/3.3V, High Bandwidth, Hot Insertion, 8-Bit, 2-Port, Bus Switch Power Supply Characteristics Parameters Description Test Conditions(1) Min ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ΔICC Supply Current per Input HIGH VCC = Max. VIN = 3.0V(3) 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 TTL driven input (control input only); A and B pins do not contribute to ΔICC . Switching Characteristics over 3.3V Operating Range PI3C3245 Com. Parameters Description tPLH tPHL Propagation Delay(1,2) Ax to Bx tPZH tPZL Bus Enable Time BE to Ax or Bx tPHZ tPLZ Bus Disable Time BE to Ax or Bx Min Test Conditions(1) CL = 50 pF R L = 500Ω Max Units 0.25 CL = 50 pF R L = 500Ω R = 500Ω 1.5 6.5 1.5 5.5 ns Notes: 1. This parameter is guaranteed but not tested on Propagation Delays. 2. 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 0.25 ns for 50 pF 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. Switching Characteristics over 2.5V Operating Range PI3C3245 Com. Parameters Description tPLH tPHL Propagation Delay(1,2) Ax to Bx tPZH tPZL Bus Enable Time BE to Ax or Bx tPHZ tPLZ Bus Disable Time BE to Ax or Bx Min Test Conditions(1) CL = 50 pF R L = 500Ω Max Units 0.25 CL = 50 pF R L = 500Ω R = 500Ω 1.5 9.8 1.5 8.3 ns Notes: 1. This parameter is guaranteed but not tested on Propagation Delays. 2. 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 0.25 ns for 50 pF 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. All trademarks are property of their respective owners. 11-0112 3 www.pericom.com PS8162F 08/24/11 PI3C3245 2.5V/3.3V, High Bandwidth, Hot Insertion, 8-Bit, 2-Port, Bus Switch 4.0 VCC = 3.3V 3.1V 2.9V 2.7V 2.5V VOUT, (V) 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 Output Voltage vs. Input Voltage over Various Supply Voltages All trademarks are property of their respective owners. 11-0112 4 www.pericom.com PS8162F 08/24/11 PI3C3245 2.5V/3.3V, High Bandwidth, Hot Insertion, 8-Bit, 2-Port, Bus Switch Packaging Mechanical: 20-pin 150-mil wide plastic QSOP (Q) DOCUMENT CONTROL NO. PD - 1202 20 REVISION: H .008 0.20 MIN. .150 .157 3.81 3.99 DATE: 10/22/07 .008 .013 0.20 0.33 Guage Plane .010 0.254 1 Detail A .337 8.56 .344 8.74 0˚-6˚ .016 .035 0.41 0.89 .041 1.04 REF .058 REF 1.47 .015 x 45˚ 0.38 .053 1.35 .069 1.75 Detail A 1 SEATING PLANE .025 BSC 0.635 .004 0.101 .010 0.254 .008 0.203 .012 0.305 .007 .010 0.178 0.254 .228 .244 5.79 6.19 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 • www.pericom.com Note: 1) Controlling dimensions in inches. 2) Ref: JEDEC MO-137B/AD 3) Dimensions do not include mold flash, protrusions or gate burrs DESCRIPTION: 20-Pin, 150-Mil Wide, QSOP PACKAGE CODE: Q Ordering Information Ordering Code Package Code Package Type PI3C3245QE Q Pb-free & Green, 20-pin QSOP 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 All trademarks are property of their respective owners. 11-0112 5 www.pericom.com PS8162F 08/24/11