PI3B3251 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 3.3V, 8:1 Mux/Demux BusSwitch Product Features Product Description Near zero propagation delay 5 Ohm switches connect inputs to outputs Ultra Low Quiescent Power (0.1µA Typical) Ideally suited for notebook applications Pin compatible with 74 series 251 logic devices Packages available: 16-pin 150 mil wide plastic QSOP (Q) 16-pin 150 mil wide plastic SOIC (W) 16-pin 173 mil wide plastic TSSOP (L) Pericom Semiconductors PI3B series of logic circuits are produced using the Companys advanced sub micron CMOS technology, achieving industry leading performance. The PI3B3251 is a 3.3V Dual 8:1 Multiplexer/demultiplexer with threestate outputs that is pinout compatible with the PI74FCT251T, 74F251, and 74ALS/AS/LS 251. Inputs can be connected to outputs with low on resistance (5 Ohm) with no additional ground bounce noise or propagation delay. Product Pin Configuration Logic Block Diagram I0 I1 I2 I3 I4 I5 I6 I7 E S0 S1 I3 1 I2 2 I1 I0 3 4 Y 5 NC E GND 6 7 8 16 VCC 15 I4 16-Pin Q, W, L 14 13 12 11 10 9 I5 I6 I7 S0 S1 S2 S2 Product Pin Description Pin Name I0–7 S 0 –2 E Y GND VCC Y Truth Table(1) E H L L L L L L L L S2 X L L L L H H H H Select S1 X L L H H L L H H S0 X L H L H L H L H Y Hi-Z I0 I1 I2 I3 I4 I5 I6 I7 Function Disable S2-0 = 0 S2-0 = 1 S2-0 = 2 S2-0 = 3 S2-0 = 4 S2-0 = 5 S2-0 = 6 S2-0 = 7 Powered by ICminer.com Electronic-Library Service CopyRight 2003 Description Data Inputs Select Inputs Enable Data Outputs Ground Power Note: 1. H = High Voltage Level L = Low Voltage Level 1 PS8150D 01/05/00 PI3B3251 3.3V, 8:1 Mux/Demux BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the 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 to Ground Potential (Inputs & VCC Only) ............... 0.5V to +4.6V Supply Voltage to Ground Potential (Outputs & D/O Only ............. 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 =3.3V ±10%) Parameters Description Test Conditions(1) Min. VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 IIH Input HIGH Current IIL Input LOW Current IOZH High Impedance Output Current 0 ≤ IN, YN ≤ VCC VIK Clamp Diode Voltage VCC = Min., IIN = –18mA RON Switch On Resistance(3) VCC = Min., VIN = 0.0V, ION = 48mA or 64mA VCC = Min., VIN = 2.4V, ION = 15mA Typ(2) Max. Units V 0.8 V VCC = Max., VIN = VCC ±1 µA VCC = Max., VIN = GND ±1 µA ±1 µA –1.2 V 8 17 Ω 5 10 Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) CIN CI (OFF) CY(OFF) CI(ON) Description Test Conditions Typ. Units Input Capacitance I0 - I7 Capacitance, Switch Off Y Capacitance, Switch Off I0 - I7 Capacitance, Switch On VIN = 0V VIN = 0V VIN = 0V VIN = 0V 3.0 8.0 64.0 72.0 pF 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 = 25°C 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. Powered by ICminer.com Electronic-Library Service CopyRight 2003 2 PS8150D 01/05/00 PI3B3251 3.3V, 8:1 Mux/Demux BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ∆ICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.0V(3) Typ.(2) Max. 0.1 Units 3 µA 750 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 TTL driven input (control input only); I and Y pins do not contribute to ICC. Switching Characteristics over Operating Range Parameters Description tPD tSY tPZH tPZL tPHZ tPLZ Propagation Delay(2,3) In to Y Bus Enable Time Sn to Y Bus Enable Time E to Y Bus Disable Time E to Y PI3B3251 Com. Min. Max. Conditions(1) CL = 50pF RL = 500Ω CL = 50pF RL = 500Ω 1 4.5 CL = 50pF RL = 500Ω 1 3.5 CL = 50pF RL = 500Ω 1 5.5 Units 0.25 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. Ordering Information Part Numbe r Pin / Package Te mpe rature PI3B3251Q 16- Q SO P (Q ) 40°C to +85°C PI3B3251W 16- SSO P (W) 40°C to +85°C PI3B3251L 16- TSSO P (L) 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 3 Powered by ICminer.com Electronic-Library Service CopyRight 2003 PS8150D 01/05/00