PI3B16224 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 3.3V, 12-Bit to 24-Bit DeMux/Mux NanoSwitch™ Features Description • • • • • • • • • • Pericom Semiconductor’s PI3B16224 is a 3.3V, 12-bit to 24-bit mux/ demux bus switch designed with a low On-Resistance allowing inputs to be connected directly to outputs. RON is 5-ohm typical at 3.3V Low power: 10µW Industrial operating temperature: –40°C to +85°C Near zero propagation delay Fast switching speed: 4.5ns max. VCC operating range: 3.0V to 3.6V 500 -ohm pulldown to unconnected B port Series 25-ohm resistor option on all outputs Make-before-break action Packaging (Pb-free & Green available): – 40-pin BQSOP (B) Block Diagram Pin Configuration A1 S1 A1 1B1 1 B2 500Ω 2B 2 A3 2B1 GND 1 B4 SW 2B 4 A A12 B 1B12 A5 1 B6 2B 6 S A7 500Ω 1 B8 2B 8 2B12 A9 1B10 2B10 A11 1B12 2B12 S1 1 2 3 4 40 39 38 37 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 40-Pin B 1B1 2B 1 A2 1 B3 2B 3 A4 1 B5 2B 5 A6 1 B7 2B 7 VCC A8 GND 1B 9 2B 9 A10 1B11 2B11 A12 Truth Table(1) Function S1 A A to 1B L 1B A to 2B H 2B 1 PS8181E 09/10/04 PI3B16224 3.3V, 12-Bit to 24-Bit DeMux/Mux NanoSwitch™ 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) Storage Temperature Range, TSTG ......................................... –65ºC to +150ºC Ambient Temperature with Power Applied ..................... –40ºC to +85ºC Supply Voltage Range, to Ground Potential .................... –0.5V to +4.6V Input Voltage Range .......................................................... –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 = –40ºC to +85ºC, VCC = 3.0 to 3.6V) Parame te rs De s cription Te s t Conditions (1) Typ.(2) M in. M ax. VIH Input HIGH Voltage Guaranteed Logic High Level 2.0 VIL Input LOW Voltage Guaranteed Logic Low Level –0 . 5 IIH Input HIGH Current VCC = Max.; VIN = VCC ±1 IIL Input LOW Current VCC = Max.; VIN = GND ±1 IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ±1 VIK Clamp Diode Voltage VCC = Min, IIN = –18mA RON Switch On Resistance RON Units V 0.8 –0.7 –1.2 VCC = Min., VIN = 0.0V, ION = 12mA 5 8 Switch On Resistance VCC = Min., VIN = 2.4V, ION = 12mA 10 15 CIN Input Capacitance VIN = 0V, 25°C, f = 1 MHz 3.0 CON A/B Capacitance VIN = 0V, 25°C, f = 1 MHz 25.0 ICC Power Supply Quiescent µA V Ω pF 10 µA Notes: 1. Typical values are shown at VCC = 3.3V, +25°C ambient and maximum loading. Switching Electrical Characteristics (TA = –40ºC to +85ºC, VCC = 3.0 to 3.6V) PI3B16224 Com. Parame te rs De s cription tPLH Propagation Delay Ax to xBx tPE Bus Enable tPD Bus Disable tM Make- before- break time Te s t Conditions CL = 50pF, RL = 500 ohms(1,2,3) CL = 50pF, RL = 500 ohms(3) CL = 50pF, RL = 500 ohms(1) M in. M a x. Units – 250 ps 1 4.5 1 5.0 0 2 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. 2 PS8181E 09/10/04 PI3B16224 3.3V, 12-Bit to 24-Bit DeMux/Mux NanoSwitch™ 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Application Circuit Application Information Logic Inputs 72 72 CPU 100 MHz 128M DIMM 100 MHz The logic control inpus can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, IN may be driven LOW to 0V and HIGH to 3.6V. Driving IN Rail-toRail minimizes power consumption. Power-Supply Sequencing and Hot Plug Information Proper power-supply sequencing is advised for all CMOS devices. It is recommended to always apply VCC and GND before applying signals to the input/output or control pins. 6 of 3B16224 72:144 Bus Switch Core Logic 128M DIMM Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd 72 Bits (64 Bits Data, 8 Bits ECC) Memory Switching Application Packaging Mechanical: 40-pin BQSOP (B) X.XX DENOTES DIMENSION IN MILLIMETERS X.XX Ordering Information Ordering Code Package Code Package Description PI3B16224B B 40-pin BQSOP PI3B16224BE B Pb-free & Green, 40-pin BQSOP Notes: 1. Thermal Characteristics can be found on the world wide web at: www.pericom.com/packaging/ Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 3 PS8181E 09/10/04