PI5C3251 8:1 Mux/DeMux BusSwitch 1 2 Features: Description: Near-Zero propagation delay Pericom Semiconductor s PI5C3251 is a Dual 8:1 Multiplexer/ Demultiplexer with three-state outputs that is pinout compatible 5 switches connect inputs to outputs 3 with the PI74FCT251T, 74F251, and 74ALS/AS/LS 251. Inputs Direct bus connection when switches are ON can be connected to outputs with low on resistance (5) with no Ultra Low Quiescent Power (0.2A typical) additional ground bounce noise or propagation delay. Ideally suited for notebook applications Pin compatible with 74 series 251 logic devices 4 Packaging (Pb-free & Green available): 16-pin 150-mil wide plastic QSOP (Q) 5 Block Diagram Pin Configuration 6 I1 I2 I3 I4 I5 I6 I7 I0 16 I3 1 VCC 15 I2 2 I4 7 E 14 I1 3 I5 S0 13 I0 4 I6 8 S1 12 Y 5 I7 S2 9 NC 6 11 S0 10 E 7 S1 10 GND 8 9 S2 Y 11 (1) Truth Table Pin Description Select Pin Name Description 12 E S2 S1 S0 Y Function I 07 Data Inputs H X X X Hi-Z Disable S 02 Select Inputs 13 L L L L I0 S2-0 = 0 E Enable L L L H I1 S2-0 = 1 Y Data Outputs L L H L I2 S2-0 = 2 14 GND Ground L L H H I3 S2-0 = 3 V Power CC L H L L I4 S2-0 = 4 15 L H L H I5 S2-0 = 5 L H H L I6 S2-0 = 6 L H H H I7 S2-0 = 7 Note: 1. H = High Voltage Level, L = Low Voltage Level 01/11/10 11-0009 1PI5C3251 8:1 Mux/DeMux BusSwitch Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Note: Storage Temperature .................................................................. 65C to +150C Stresses greater than those listed under MAXIMUM Ambient Temperature with Power Applied ................................. 40C to +85C RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of Supply Voltage to Ground Potential (Inputs & V Only) ........... 0.5V to +7.0V CC the device at these or any other conditions above those Supply Voltage to Ground Potential (Outputs & D/O Only) ........ 0.5V to +7.0V indicated in the operational sections of this specifica- tion is not implied. Exposure to absolute maximum DC Input Voltage .......................................................................... 0.5V to +7.0V rating conditions for extended periods may affect DC Output Current ..................................................................................... 120 mA reliability. Power Dissipation .......................................................................................... 0.5W DC Electrical Characteristics (Over the Operating Range, T = 40C to +85C, V =5V 5%) A CC (1) (2) Parameters Description Min. Max. Units Test Conditions Typ V Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 IH V V Input LOW Voltage Guaranteed Logic LOW Level 0.5 0.8 IL I Input HIGH Current V = Max., V = V 1 IH CC IN CC I Input LOW Current V = Max., V = GND 1 A IL CC IN I High Impedance Output Current 0 I, Y V 1 OZH CC V Clamp Diode Voltage V = Min., I = 18 mA 0.7 1.2 V IK CC IN (3) I Short Circuit Current I (Y) = 0V, Y (I) = V 100 mA OS CC V Input Hysteresis at Control Pins 150 mV H V = Min., V = 0.0V, I = 48 mA 5 7 CC IN ON (4) R Switch On-Resistance ON V = Min., V = 2.4V, I = 15 mA 10 15 CC IN ON Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at V = 5.0V, T = 25C ambient and maximum loading. CC A 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. 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. Capacitance (T = 25C, f = 1 MHz) A (1) Parameters Description Test Conditions Typ. Max. Units C Input Capacitance 6 IN C I - I Capacitance, Switch Off 6 I(OFF) 0 7 V = 0V pF IN C Y Capacitance, Switch Off 48 Y(OFF) C I - I Capacitance, Switch On 35 54 I(ON) 0 7 Notes: 1. This parameter is determined by device characterization but is not production tested. 01/11/10 11-0009 2