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| 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B33X257 3.3V, 24:12 Mux/Demux BusSwitch Product Features Permits Hot Insertion Near zero propagation delay 5 Ohm switches connect inputs to outputs Direct bus connection when switches are ON Ultra Low Quiescent Power (0.2A Typical) Ideally suited for notebook applications TTL - compatible control of input levels Fast switching speed - 4.5ns max. Packages available: 48-pin 150 mil wide plastic BQSOP (B) Product Description Pericom Semiconductors PI3B series of logic circuits are produced using the Companys advanced sub micron CMOS technology, achieving industry leading performance. The PI3B33X257 is a 3.3V, 24:12 multiplexer/demultiplexer with three-state outputs. Inputs can be connected to outputs with low on resistance (5 Ohm) with no additional ground bounce noise or propagation delay. Logic Block Diagram IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1 Truth Table(1) En H L L Notes: Sn X L H YA(2) Hi-Z IA0 IA1 YB(2) Hi-Z IB0 IB1 YC(2) Hi-Z IC0 IC1 YD(2) Hi-Z ID0 ID1 Function Disable S=0 S=1 E0 1. H = High Voltage Level L = Low Voltage Level 2. n = 0 YA, YB, YC, YD n = 1 YE, YF, YG, YH n = 2 YI, YJ, YK, YL S0 48-Pin Product Configuration S0 IA0 IA1 YA IB0 IB1 YB GND S1 IE0 IE1 YE IF0 IF1 YF GND S2 II0 II1 YI IJ0 IJ1 YJ GND 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 VCC E0 ID0 ID1 YD IC0 IC1 YC VCC E1 IH0 IH1 YH IG0 IG1 YG VCC E2 IL0 IL1 YL IK0 IK1 YK S2 E2 II0 S1 E1 IE0 YA IE1 IF0 YB IF1 IG0 YC IG1 IH0 YD IH1 48-Pin B 37 36 35 34 33 32 31 30 29 28 27 26 25 YE YF YG YH II1 IJ0 IJ1 IK0 IK1 IL0 IL1 YI YJ YK YL 1 PS8334A 09/28/99 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B33X257 3.3V, 24:12 Mux/Demux BusSwitch Product Pin Description Pin Name IAn-ILn S En YA-YL GND VCC NC Description Data Inputs Select Inputs Enable Data Outputs Ground Power No Connect 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 ............................................................................... 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 the Operating Range, TA = -40C to +85C, VCC = 3.3V 5%) Parameters Description VIH VIL IIH IIL IOZH VIK RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Clamp Diode Voltage Switch On Resistance(3) Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND VCC = Min., IIN = -18mA VCC = Min., VIN = 0.0V, ION = 48mA or 64mA VCC = Min., VIN = 2.4V, ION = 15mA 5 10 Min. Typ.(2) 2.0 -0.5 0.8 50 1 50 -1.2 7 15 Max. Units V V A A A V High Impedance Output Current 0 I, Y VCC Capacitance (TA = 25C, f = 1 MHz) Parameters(4) CIN COFF CON Description Input Capacitance In/Yn Capacitance, Switch Off In/Yn Capacitance, Switch On Test Conditions VIN = 0V VIN = 0V VIN = 0V Typ. 3.0 17.0 25.0 Max. 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. Measured by the voltage drop between I and Y pin at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (I,Y) pins. 4. This parameter is determined by device characterization but is not production tested. 2 PS8334A 09/28/99 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI3B33X257 3.3V, 24:12 Mux/Demux 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) Max. 0.1 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); I and Y pins do not contribute to ICC. Switching Characteristics over Operating Range Conditions(1) PI3B33X257 Com. Min. Max. 0.25 1 1 1 4.5 4.5 4.8 ns Parameters Description tIY t SY t PZH t PZL t PHZ t PLZ Units Propagation Delay(2,3) CL = 50pF In to Yn RL = 500 Bus Select Time Sn to Yn Bus Disable Time E to Yn Bus Disable Time E to Yn 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. Ordering Information Part Numbe r PI33X257B Pin / Package 48- BQ SO P (B48) Te mpe rature 40C to +85C Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com 3 PS8334A 09/28/99 |
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