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 PS8172F 02/15/06 PI3B16248 3.3V, 24-Bit to 48-Bit, Mux/DeMux NanoSwitch™ Application Circuit Pin Configuration 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 PS8172F 02/15/06 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 3.5 CON Output Capacitance VCC = 0V, 25°C, f = 1 MHz 32 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. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. 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 Test Conditions(1) Description tPLH Propagation Delay AX to BX(2,3) tEN Bus Enable tDIS Bus Disable tM Make-before-break time Com. Min. CL = 50pF, RL = 500Ω CL = 50pF RL = 500Ω R = 500Ω Units Max. 250 1 4.5 1 5.0 0 2 ps ns 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 PS8172F 02/15/06 PI3B16248 3.3V, 24-Bit to 48-Bit, Mux/DeMux NanoSwitch™ Switch Position Test Circuit ����� ������������ ����������� ������������� ����������� ��� �� ��� ���� ���� ��� ����� ��������� ���� ������������� ���������������������������������������� ��������������������������� ��������������������������������������� ���������������������������������������������� ������ ���� �� �� ���� Propagation Delay Diagram Enable and Disable Timing ������ ������� �� ���� ������� ����� ������ �������� ���� ���������� ����������������� ���� ���� ���� ������ �� �� ���� ���� ���� ������ ���� �� ��� ���� ���� ��� ���� ������ ��� ���� ��� ���� ���� �� ���� ���� �� �� ���� ������ �������� ��� ������� �� ��� ��� ��� ���� ��� �������������� ����������������� �� ���� �� ���� �� ����������������������������������������������������������� ����������������������������������� ������������������������������������������� 4 PS8172F 02/15/06 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: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free and Green • X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 5 PS8172F 02/15/06