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| 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B32X245 3.3V, Hot Insertion 16-Bit, 2-Port Bus Switch Product Description Product Features Fast Switching Speed: 4.5ns max. Permits Hot Insertion Near-zero propagation delay 5 switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power (1.0A typical) Ideally suited for notebook applications Industrial operating temperature: 40C to +85C TTL - compatible control of input levels Packages available: 40-pin 150 mil wide plastic BQSOP (B) Pericom Semiconductors PI3B series of logic circuits are produced using the Companys advanced submicron CMOS technology. The PI3B32X245 is a 3.3V,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. Product Pin Configuration NC A0 A1 A2 A3 A4 A5 A6 A7 GND NC A8 A9 A10 A11 A12 A13 A14 A15 GND 1 40 2 39 3 38 4 37 5 36 6 35 34 7 8 40-Pin 33 B 32 9 31 10 30 11 29 12 28 13 27 14 26 15 25 16 24 17 23 18 22 19 21 20 VCC BE1 B0 B1 B2 B3 B4 B5 B6 B7 VCC BE2 B8 B9 B10 B11 B12 B13 B14 B15 Logic Block Diagram ) )% *- )& )# **& *# * *" Truth Table(1) Function Disconnect Connect BEn H L A015 Hi-Z B015 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 Notes: 1. H= High Voltage Level L = Low Voltage Level Hi-Z = High Impedance 1 PS8337A 03/31/99 DC Electrical Characteristics (Over the Operating Range, TA = 40C to +85C, VCC = 3.3V 10%) Parame te rs VIH VIL IIH IIL IOZH VIK RON D e s cription Input HIGH Voltage Input LO W Voltage Input HIGH Current Input LO W Current High Impedence O utput Current Clamp Diode Voltage Switch O n Resistance(4) Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LO W Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., INN = - 18mA VCC = Min., VIN = 0.0V, ION = 48mA or 64mA VCC = Min., VIN = 2.4V, ION = 15mA 5 10 - 1.2 8 17 V 1 A M in. 2.0 - 0.5 0.8 Typ.(2) M ax. Units V 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B32X245 3.3V, Hot Insertion 16-Bit, 2-Port BusSwitch 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 +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. 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 8.0 16.0 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 = 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. 2 PS8337A 03/31/99 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B32X245 3.3V, Hot Insertion 16-Bit, 2-Port BusSwitch Power Supply Characteristics Parameters Description ICC ICC Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Test Conditions(1) VCC = Max. VCC = Max. VIN = GND or VCC VIN = 3.0V(3) Min. Typ.(2) 1.0 Max. 3.0 750 Units A A 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 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. PI3B32X245 Switching Characteristics over Operating Range Parameters Description tPLH tPHL tPZH tPZL tPHZ tPLZ 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= 50pF RL= 500 PI3B32X245 Com. Min. Max. 1.0 1.0 0.25 4.0 4.5 ns Units 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. Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com 3 PS8337A 03/31/99 |
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