PI3B3257A 3.3V, Quad 2:1 Mux/DeMux NanoSwitch™ Features Description • Near-Zero propagation delay Pericom Semiconductor’s PI3B3257A is a 3.3 Volt, Quad 2:1 multiplexer/demultiplexer with three-state outputs that is pinout and function compatible with the PI74FCT257T, 74F257, and 74ALS/AS/LS257. Inputs can be connected to outputs with low On-Resistance (5Ω) with no additional ground bounce noise or propagation delay. • 5Ω switches connect inputs to outputs • Fast Switching Speed: 4.8ns max. • Ultra-Low Quiescent Power: 0.1µA typical – Ideally suited for notebook applications • Pin compatible with 74 series 257 logic devices • Packaging (Pb-free & Green avaliable): – 16-pin 150 mil wide plastic QSOP (Q) Pin Configuration Block Diagram IA0 IC1 ID0 IB1 IC0 IA1 IB0 ID1 SW SW SW E SW SW SW S SW SW S 1 16 VCC IA0 2 15 E IA1 3 14 ID0 YA 4 13 ID1 IB0 5 12 YD IB1 6 11 IC0 YB 7 10 IC1 GND 8 9 YC SW YA YB YC YD I Y Pin Description Pin Name E Truth Table(1) E S YA YB YC YD Function H X Hi-Z Hi-Z Hi-Z Hi-Z L L IA 0 IB0 IC0 ID 0 S=0 L H IA 1 IB1 IC1 ID 1 S=1 Disable Note: 1. H = High Voltage Level L = Low Voltage Level 1 Description IA N -ID N Data Inputs S Select Inputs E Enable YA-YD Data Outputs GND Ground VCC Power NC No Connect PS8758A 02/24/05 PI3B3257A 3.3V, Quad 2:1 Mux/DeMux NanoSwitch™ 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.................................................–0.5V to +4.6V DC Input Voltage .............................................................................–0.5V to +4.6V DC Output Current........................................................................................ 120mA Power Dissipation ............................................................................................ 0.5W Note: 1. 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 Test Conditions(1) Description Min. Typ.(2) Max. Units VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2 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 ≤ In, Yn ≤ VCC ±1 VIK Clamp Diode Voltage VCC = Min., IIN = –18mA RON Switch On-Resistance(3) V 0.8 µA –1.2 VCC = Min., VIN = 0.0V, Ion = 48mA or 64mA 5 7 VCC = Min., VIN = 2.4V, ION = 15mA 8 17 Test Conditions Typical V Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters Description CIN Input Capacitance COFFYN YN Capacitance, Switch OFF COFFIN IN Capacitance, Switch OFF CON IN/YN Capacitance, Switch ON Units 2 VIN = 0V 7.5 pF 4.0 11 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. 2 PS8758A 02/24/05 PI3B3257A 3.3V, Quad 2:1 Mux/DeMux NanoSwitch™ Power Supply Characteristics Parameters Test Conditions(1) Description ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ∆ICC Supply Current per Input @ TTL HIGH(3, 4) VCC = Max. VIN = 3.0 Min. Typ.(2) 0.1 Max. Units 3.0 µA 750 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 inputs only); I and Y pins do not contribute to ICC. 4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The I and Y inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design. Switching Characteristics Over Operating Range Parameters Description tIY Propagation Delay In to Yn(2,3) tSY Bus Select Time, Sn to Yn tPZH tPZL Bus Enable Time, E to Yn tPHZ tPLZ Bus Disable Time, E to Yn Conditions(1) Com. Min. Units Max. 0.25 CL = 50pF RL = 500Ω 1 4.5 1 4.5 1 4.8 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 switch’s time constant 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. Applications Information Logic Inputs The logic control inputs 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-to-Rail® 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 input/output or control pins. Rail-to-Rail is a registeredtrademark of Nippon Motorola, Ltd. 3 PS8758A 02/24/05 PI3B3257A 3.3V, Quad 2:1 Mux/DeMux NanoSwitch™ Packaging Mechanical: 16-Pin QSOP (Q) 16 .008 0.20 MIN. .150 .157 3.81 3.99 Guage Plane .010 0.254 1 0˚-6˚ .016 .035 0.41 0.89 Detail A .189 .197 4.80 5.00 .041 1.04 REF .015 x 45° 0.38 .008 0.203 REF .053 1.35 .069 1.75 Detail A .008 .012 0.203 0.305 .007 .010 0.178 0.254 0.41 .016 1.27 .050 SEATING PLANE .025 BSC 0.635 .008 .013 0.20 0.33 .228 .244 5.79 6.19 .004 0.101 .010 0.254 X.XX DENOTES DIMENSIONS IN MILLIMETERS X.XX Ordering Information Ordering Code Packaging Code Package Description PI3B3257AQ Q 16-pin 150-mil wide plastic QSOP PI3B3257AQE Q Pb-Free & Green, 16-pin 150-mil wide plastic QSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 • Fax (408) 435-1100 • www.pericom.com 4 PS8758A 02/24/05