PI3B16248 3.3V, 24-Bit to 48-Bit Mux/DeMux NanoSwitch™ Features Description • • • • • • • • Pericom Semiconductor’s PI3B16248 is a 3.3V, 24-bit to 48-bit Mux/DeMux Bus Switch designed with a low On-Resistance allowing inputs to be connected directly to outputs. Near-Zero propagation delay RON is 5Ω typical at 3.3V Fast switching speed: 4.5ns (max.) VCC operating range: 3.0V to 3.6V 500Ω pulldown to the unconnected B port Industrial operating temperature: –40°C to +85°C Make-before-break action Packaging (Pb-free & Green): – 80-pin BQSOP (B) Block Diagram A1 1B1 A13 500Ω 1B13 500Ω 2B1 2B13 SW A12 1B12 A24 500Ω 1B24 B S 500Ω 2B12 A 2B24 S1 S2 Truth Table(1) Function S2/S1 A A to 1B L 1B A to 2B H 2B Note: 1. H = High Voltage Level, L = Low Voltage Level 1 PS8172E 09/10/04 PI3B16248 3.3V, 24-Bit to 48-Bit, Mux/DeMux NanoSwitch™ Application Circuit Pin Configuration S1 1 80 1B1 A1 2 79 2B1 1B2 3 78 A2 2B2 4 77 1B3 A3 5 76 2B3 GND 6 75 A4 1B4 7 74 1B5 2B4 8 73 2B5 A5 9 72 A6 1B6 10 71 1B7 2B6 11 70 2B7 A7 12 69 VCC 1B8 13 68 A8 2B8 14 67 GND A9 1B10 15 66 1B9 16 65 2B9 2B10 17 64 A10 A11 1B1 18 63 1B11 19 62 2B11 2B12 61 A12 S2 20 21 60 1B13 A13 22 59 2B13 1B14 23 58 A14 2B14 24 57 1B15 A15 25 56 2B15 GND 26 55 A16 1B16 27 54 1B17 2B16 28 53 2B17 A17 29 52 A18 1B18 30 51 1B19 2B18 31 50 2B19 A19 32 49 VCC 1B20 33 48 A20 2B20 34 47 GND A21 B 1 22 35 46 1B21 36 45 2B21 2B22 37 44 A22 A23 1B2 38 43 1B23 39 42 2B23 2B24 40 41 A24 72 72 CPU 72:144 Bus Switch Core Logic 128M DIMM 100 MHz 128M DIMM 100 MHz 128M DIMM 100 MHz 3 of 3B16248 128M DIMM 100 MHz 72 Bits (64 Bits Data, 8 Bits ECC) Memory Switching Application 2 PS8172E 09/10/04 PI3B16248 3.3V, 24-Bit to 48-Bit, Mux/DeMux NanoSwitch™ Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) Storage Temperature ........................................................ –65°C to +150°C Ambient Temperature with Power Applied ....................... –40°C to +85°C Supply Voltage Range......................................................... –0.5V to +4.6V DC Input Voltage ................................................................ –0.5V to +4.6V 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 = –40°C to +85°C, VCC = 3.0 to 3.6V) Parameters Test Conditions(1) Description Min. Typ.(2) Max. VIH Input HIGH Voltage S1, S2 2.0 VIL Input LOW Voltage S1, S2 -0.5 IIH Input HIGH Current VCC = MAX., VIN = VCC ±1 IIL Input LOW Current VCC - MAX., VIN = GND ±1 RON Switch On-Resistance VCC = Min., VIN = 0V, ION = 24mA 5 8 VCC = Min., VIN = 0V, ION = 12mA 10 15 Units V 0.8 CIN Input Capacitance VCC = 0V, 25°C, f = 1 MHz 3.0 CON Output Capacitance VCC = 0V, 25°C, f = 1 MHz 25.0 ICC Power Supple Quiescent VCC = Max., VIN = GND or VCC 20 IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ±1 VIK Clamp Diode Voltage VCC = Min., IIN = -18mA ` -0.7 µA Ω pF µA -1.2 V Note: 1. Typical values are shown at VCC = 3.3V, +25°C ambient and maximum loading. Electrical Characteristics (VCC = 3.0V to 3.6V, TA = –40°C to +85°C) Parameters Description tPLH Propagation Delay AX to BX tEN Bus Enable (3) tDIS tM (3) Test Conditions Com. Min. CL = 50pF, RL = 500Ω CL = 50pF RL = 500Ω R = 500Ω Bus Disable Make-before-break time Units Max. 250 1 4.5 1 5.0 0 2 ps 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 0.25ns 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. See test circuit and waveforms. 3 PS8172E 09/10/04 PI3B16248 3.3V, 24-Bit to 48-Bit, Mux/DeMux NanoSwitch™ 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® 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. Packaging Mechanical: 80-pin BQSOP (B) 80 41 .150 .157 3.80 4.00 .228 .244 5.80 6.20 .008 NOM 0.203 Gauge Plane 5˚ 1 0.50 .019 REF 0.803 0.811 20.40 20.60 .010 .016 .063 1.60 Nom .0197 BSC 0.50 .007 .010 0.17 0.27 .010 0.254 BSC .019 0.50 .029 0.75 40 0.254 x 45˚ 0.406 .078 2.0 Max 5˚ .002 .009 0.05 0.25 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS Ordering Information Ordering Code Package Code Package Description PI3B16248B B 80-pin BQSOP PI3B16248BE B Pb-free & Green, 80-pin BQSOP 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 4 PS8172E 09/10/04