PI2BV3868 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 3.3V, 20:10 DDR Mux/Demux Bus Switch w/Dual Enables Product Features Product Description • • • • • • Pericom Semiconductor’s PI2B series of logic circuits are produced using the Company’s advanced submicron CMOS technology, achieving industry leading performance. Near-zero propagation delay 20-ohm switches connect inputs to outputs Fast Switching Speed : 2.5ns Low Off Capacitance : 3pF Pull-down on B output Packages available: – 48-pin 150 Mil (3.9mm) Wide BQSOP (B) – 48-pin 240 Mil (6.1mm) Wide TSSOP (A) The PI2BV3868 is a 20:10, 3.3V Mux/Demux bus switch designed with a low ON-resistance allowing inputs to be connected directly to outputs. The bus switch creates no additional propagation delay or additional ground bounce noise. The switches are turned ON by two Low Enable Select (SEL) signals. The PI2BV3868 switch can be used for High-Performance Memory Module Applications, where the seperate SELECTS allow for transferring clock, address, or data to two destinations. Logic Block Diagram Pin Configuration A0 1B0 2B0 VCC A1 GND 1B2 2B2 VCC A3 GND 1B4 2B4 VCC A5 GND 1B6 2B6 VCC A7 GND 1B8 2B8 A9 SEL2 1B0 2B0 A9 1B9 2B9 SEL1 SEL2 Pin Description Pin Name De s cription SELY Bus Enable Input AX Demux Inputs YBX Mux Inputs GND Ground VC C Power 48 1 47 2 46 3 45 4 44 5 43 6 42 7 41 8 40 9 39 10 11 48-Pin 38 12 A, B 37 36 13 35 14 34 15 33 16 32 17 31 18 19 30 20 29 21 28 22 27 23 26 24 25 A0 GND 1B1 2B1 VCC A2 GND 1B3 2B3 VCC A4 GND 1B5 2B5 VCC A6 GND 1B7 2B7 VCC A8 1B9 2B9 SEL1 Truth Table Function Notes: H = High Voltage Level; L = Low Voltage Level X = 0 through 9; Y = 1 or 2 1 SEL1 SEL2 AX to 1BX; Terminate 2BX L H AX to 2BX; Terminate 1BX H L nA to nB1 and nB2 L L nB1, nB2 = Hi- Z H H PS8612A 09/16/02 PI2BV3868 3.3V, 20:10 DDR Mux/Demux Bus Switch with Dual Enables 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Note: Storage Temperature ................................................. –65°C to +150°C Stresses greater than those listed under MAXIMUM Ambient Temperature with Power Applied ................ –40°C to +85°C RATINGS may cause permanent damage to the device. Supply Voltage to Ground Potential ............................. –0.5V to +4.6V This is a stress rating only and functional operation of the device at these or any other conditions above those DC Input Voltage .......................................................... –0.5V to +4.6V indicated in the operational sections of this specification DC Output Current ................................................................... 120mA is not implied. Exposure to absolute maximum rating conPower Dissipation ...................................................................... 0.5W ditions for extended periods may affect reliability. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V±10%) Pa ra me te rs D e s criptio n Te s t Co nditio ns M in. Typ.(2) M ax. VIH Inp ut HIGH Vo ltage Guaranteed Lo gic HIGH Level 1.6 – VC C +0.3 VIL Inp ut LO W Vo ltage Guaranteed Lo gic LO W Level –0.3 – 0.9 VIK C lamp Dio d e Vo ltage VC C = Min. , IIN = –18 mA – – –1.2 IIH/IIL Inp utHigh/Lo w C urrent VC C = Max. , VIN = VC C o r GN D – – RO N S witch O N Resistance(4) VC C = Min. , VIN = 0 . 9 V, IO N = 2 0 mA – 17 33 22 30 RP/D P ull- Do wn Resistance(5) – – VC C = Min. , VIN = 1. 6 V, IO N = 15 mA VBIAS(B- Ports) = 1. 8 V. , IO ZH 18 0 µA 10 Units V ± 10 µA O hm kO hm Capacitance (TA = 25°C, f = 1 MHz) Pa ra me te rs (1) C IN D e s criptio n Te s t Co nditio ns Typ. Inp ut C ap acitance Units 3 C O FF(A) A C ap acitance, S witch O ff 4 C O FF (B) B C ap acitance, S witch O ff 2 C O N (A/B) A/B C ap acitance, S witch O n 6 VIN = 0 V 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 = 25°C 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. 5. Pull-down resistance is measured with the switch OFF and calculated by VBIAS(B-Port) / IOZH. Power Supply Characteristics Parame te rs ICC De s cription Quiescent Power Supply Current Te s t Conditions (1) VCC = Max, VIN = GND or VCC M in. Typ(2) M ax. Units – – 10 µA 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, +25°C ambient. 3. Per LVTTL driven input (control input only); A and B pins do not contribute to ICC. 2 PS8612A 09/16/02 PI2BV3868 3.3V, 20:10 DDR Mux/Demux Bus Switch with Dual Enables 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Switching Characteristics over Operating Range Parame te rs Conditions (1) D e s cription PI2B V3868 Units Com. M in. Typ. M ax. fO ATA Max Data Frequency(8) – – – 266 MHz tPLH tPHL Propagation Delay (2,3,7) AN to BN , BN to AN (tPD) C L = 4pF RL = 500 ohms – 0.5 1 ns tPZH tPZL Bus Enable Time(6) SEL to AN , BN 0.6 – 2.5 0.6 – 2.5 tPHZ tPLZ Bus Disable Time(5) SEL to AN , BN 0.6 – 1.8 0.6 – 1.8 Parameter Measurements S1 500Ω From Output Under Test CL = 4pF (See note 1) 2xVCC Open GND 500Ω Output Control (Low Level Enabling) Load Circuit VCC VCC/2 VCC/2 Input Output Waveform 1 S1 at 2xVCC (see Note 2) 0V tPLH tPHL VOH Output VCC/2 Output Waveform 2 S1 at GND (see Note 2) VCC/2 VOL Voltage Waveforms Propagation Delay Times Te s t S1 tPD O p en tPLZ/tPZL 2xVC C tPHZ/tPZH GN D VCC VCC/2 VCC/2 0V tPZL tPLZ VOH VCC/2 VOL +0.15V tPZH VOL tPHZ VOH VCC/2 VOH -0.15V 0V Voltage Waveforms Enable and Disable Times Notes: 1. CL includes probe and jig capacitance. 2. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. 3. All input pulses are supplied by generators having the following characteristics: PRR<10MHz, ZO = 50 ohms, tR ≤ 2ns, tF ≤ 2ns. 4. The outputs are measured one at a time with one transition per measurement. 5. tPLZ and tPHZ are the same as tDIS. 6. tPZL and tPZH are the same as tEN. 7. tPLH and tPHL are the same as tPD. 8. Guaranteed by design, but not production tested. 3 PS8612A 09/16/02 PI2BV3868 3.3V, 20:10 DDR Mux/Demux Bus Switch with Dual Enables 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical A-48: 48-pin TSSOP 48 .236 .244 1 6.0 6.2 .488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE .004 0.09 .008 0.20 X.XX X.XX .007 .010 .0197 BSC 0.50 DENOTES DIMENSIONS IN MILLIMETERS 0.45 .018 0.75 .030 .002 .006 0.05 0.15 0.17 0.27 .319 BSC 8.1 Packaging Mechanical B-48: 48-pin BQSOP 48 .150 .157 3.80 4.00 .228 .244 5.80 6.20 Gauge Plane .020 .029 0.50 0.75 .010 0.25 BSC 1 .386 .394 9.80 10.00 .014 0.356 REF .015 0.381 x 45˚ .008 0.20 Nom Nom .063 1.60 5˚ .0157 BSC 0.40 .0051 .009 0.13 0.23 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .079 2.0 Max .002 0.05 .009 0.25 Ordering Information Part Pin - Package Te mpe rature PI2BV3868A 48 - TSSOP (A) –40°C to +85°C PI2BV3868B 48 - BQSOP (B) –40°C to +85°C Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 4 PS8612A 09/16/02