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| 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B16244 3.3V, 16-Bit, 4-Port NanoSwitchTM Features * * * * * * * Near-Zero propagation delay 5-ohm switches connect inputs to outputs when enabled Fast Switching Speed - 4ns max. Pin compatible with 74 series 16244 Operating Vcc: 3.0V to 3.6V Industrial operating temperature: -40C to +85C Packaging (Pb-free & Green available): - 48-pin 240 mil wide thin plastic TSSOP (A) - 48-pin 300 mil wide plastic SSOP (V) Description Pericom Semiconductor's PI3B16244 is a 16-bit, 4-port bus switch that is pin compatible with the 74 series 16244 16-bit driver. Four enable signals (nBE) turn the switch on similar to the enable signals of the 16244. The bus switch creates no additional propagation delay or ground bounce noise. Block Diagram 1BE 1A0 3BE Pin Configuration 1BE 1B0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 2BE 1A0 1A1 SW SW SW SW 1B0 3A0 SW SW SW SW 3B0 1B1 GND 1A1 1A2 1B1 1B0 3A1 3A2 3B1 3B0 1B2 1B3 GND 1A2 1A3 SW VCC 2B0 2B1 VCC 2A0 2A1 1A3 1B1 3A3 3B1 A B GND 2B2 2B3 GND 2A2 2A3 3A0 3A1 2BE 2A0 4BE SW SW SW SW 2B0 4A0 SW SW SW SW 4B0 BE 3B0 3B1 2A1 2A2 2B1 2B2 4A1 4A2 4B1 4B2 GND 3B2 3B3 GND 3A2 3A3 VCC 2A3 2B3 4A3 4B3 4B0 4B1 VCC 4A0 4A1 GND GND 4A2 4A3 3BE Truth Table(1) Function Disconnect Connect Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance 4B2 4B3 nBE H L nA0-7 Hi- Z nB0- 7 4BE Pin Description Pin Name nBE nA0- nA7 nB0- nB7 I/O I I/O I/O Bus A Bus B De s cription Bus Output Enable (Active Low) 1 PS8170D 10/01/04 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B16244 3.3V, 16-Bit, 4-Port NanoSwitchTM Maximum Ratings (Above which 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 Range ....................................................... -0.5V to +4.6V DC Input Voltage ............................................................... -0.5V to +4.6V 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 = 3.0V to 3.6V) Parame te rs VIH VIL IIH IIL IO ZH VIK RO N De s cription Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Switch ON Resistance(3) Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VC C = Max., VIN = VC C VC C = Max., VIN = GND 0 A, B VC C VC C = Min., IIN = -18mA VC C = Min., VIN = 0.0V, ION = 48mA VC C = Min., VIN = 2.4V, ION = 15mA -0.7 5 10 M in. 2.0 -0.5 0.8 1 1 1 -1.2 8 15 V A Typ.(2) M ax. Units V Capacitance (TA = 25C, f = 1 MHz) Parame te rs (4) CIN C O FF CON De s cription Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Te s t Conditions Typ. 3.0 8.5 17.0 pF Units 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. 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. 4. This parameter is determined by device characterization but is not production tested. 2 PS8170D 10/01/04 Applications Information Logic Inputs Logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a 5.0V supply, the control or select pins may be driven low to 0V and high to 5.5V. Driving the control or select pins Rail-toRail(R) minimizes power consumption. Power-Supply Sequencing and Hot Plug Information Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC and GND before applying signals to the input/output or control pins. 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B16244 3.3V, 16-Bit, 4-Port NanoSwitchTM Power Supply Characteristics Parame te rs ICC ICC ICCD De s cription Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) Conditions (1) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open Control Input Toggling 50% Duty Cycle VIN = GND or VCC VIN = 3.0V(3) M in. -- -- -- Type (2) -- -- -- M ax. 10 750 0.25 A Units 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 = 3.3V, +25C ambient. 3. Per TTL driven input (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. Switching Characteristics over Operating Range Conditions (1) Parame te rs tP LH tP HL tP ZH tP ZL tP HZ tP LZ De s cription 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 C L = 50pF RL = 500 C L = 50pF RL = 500 R = 500 1 M in. Com. M a x. 0.25 4.5 ns 1 5.0 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. 3 PS8170D 10/01/04 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B16244 3.3V, 16-Bit, 4-Port NanoSwitchTM Packaging Mechanical: 48-pin 240 Mil-Wide Thin Plastic TSSOP (A) 48 .236 .244 6.0 6.2 1 .488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE .004 0.09 .008 0.20 0.45 .018 0.75 .030 .319 BSC 8.1 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS .0197 BSC 0.50 .007 .010 0.17 0.27 .002 .006 0.05 0.15 Packaging Mechanical: 48-pin 300 Mil-Wide Plastic SSOP (V) 48 .291 .299 7.39 7.59 .395 .420 10.03 10.67 Gauge Plane .010 0.25 1 .620 .630 15.75 16.00 .02 0.51 .04 1.01 .008 0.20 Nom. .015 0.381 x 45 .025 0.635 .110 2.79 Max .025 BSC 0.635 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .008 0.20 .0135 0.34 0-8 .008 0.20 .016 0.40 4 PS8170D 10/01/04 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B16244 3.3V, 16-Bit, 4-Port NanoSwitchTM Ordering Information Ordering Code PI3B16244A PI3B16244AE PI3B16244V PI3B16244VE Package Code A A V V Package Type 48-pin TSSOP Pb-free & Green, 48-pin TSSOP 48-pin SSOP Pb-free & Green, 48-pin SSOP 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 5 PS8170D 10/01/04 |
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