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| 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI5C32X2245 16-BIT, 2-PORT BusSwitch with 25 Series Resistor PI5C32X2245 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 16-Bit, 2-Port BusSwitch with 25 Series Resistor Product Features: * * * * * Near-zero propagation delay 25 series resistor termination 5 switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power (0.2 A typical) - Ideally suited for notebook applications * Pin compatible with QS32X245 * Industrial operating temperature: -40C to +85C * Packages available: - 40-pin 150 mil wide plastic BQSOP (B) Product Description: Pericom Semiconductor's PI5C series of logic circuits are produced in the Company's advanced 0.6 micron CMOS technology. The PI5C32X2245 is a 16-bit, 2-port bus switch . Two enable signals (BEn) turn the switches on. The bus switch creates no additional propagational delay or additional ground bounce noise. The device has a built-in 25 resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor. Logic Block Diagram Product Pin Configuration 40-PIN B Truth Table(1) Function BEn A0-15 Disconnect H Hi-Z Connect L B0-15 Note: 1. H= High Voltage Level L = Low Voltage Level Hi-Z = High Impedance Product Pin Description Pin Name BEn A0-A15 B0-B15 I/O I I/O I/O Description Bus Enable Input (Active LOW) Bus A Bus B 164 PS8195 05/05/98 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI5C32X2245 16-BIT, 2-PORT BusSwitch with 25 Series Resistor 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 ............................................................................ 120 mA 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 10%) Parameters Description VIH VIL IIH IIL IOZH VIK IOS VH RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current (3) Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 - A, B - VCC VCC = Min., IIN = -18 mA A (B) = 0V, B (A) = VCC VCC = Min., VIN = 0.0V, ION = 48 mA VCC = Min., VIN = 2.4V, ION = 15 mA Min. 2.0 -0.5 - - - - 100 - - - Typ(2) - - - - - -0.7 - 150 28 35 Max. - 0.8 1 1 1 -1.2 - - 40 48 Units V V A A A V mA mV Input Hysteresis at Control Pins 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 6 6 12 Units pF pF 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 = 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. 165 PS8195 05/05/98 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI5C32X2245 16-BIT, 2-PORT BusSwitch with 25 Series Resistor Power Supply Characteristics Parameters Description ICC ICC ICCD 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 = 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 0.25 Units A mA 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. PI5C32X2245 Switching Characteristics over Operating Range PI5C32X2245 Com. Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BEX to Ax or Bx Bus Disable Time BEx to Ax or Bx Conditions(1) CL = 50 pF RL = 500 Min. Max. Unit -- 1.5 1.5 1.25 7.5 5.5 ns 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 0.25 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. Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com 166 PS8195 05/05/98 |
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