PI5C3251 8:1 Mux/DeMux BusSwitch Features: 2 Description: • • • • Near-Zero propagation delay 5Ω switches connect inputs to outputs Direct bus connection when switches are ON Ultra Low Quiescent Power (0.2µA typical) – Ideally suited for notebook applications • Pin compatible with 74 series 251 logic devices • Packaging (Pb-free & Green available): – 16-pin 150-mil wide plastic QSOP (Q) Pericom Semiconductor’s PI5C3251 is a Dual 8:1 Multiplexer/ Demultiplexer with three-state outputs that is pinout compatible with the PI74FCT251T, 74F251, and 74ALS/AS/LS 251. Inputs can be connected to outputs with low on resistance (5Ω) with no additional ground bounce noise or propagation delay. Block Diagram Pin Configuration I0 I1 I2 I3 I4 I5 5 I6 I7 S0 S1 S2 Truth Table(1) 6 I3 1 16 VCC I2 2 15 I4 I1 3 14 I5 I0 4 13 I6 Y 5 12 I7 NC 6 11 S0 E 7 10 S1 8 9 S2 GND Y E H L L L L L L L L 7 8 9 10 11 Pin Description Pin Name 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 12 Description I0–7 Data Inputs S0–2 Select Inputs E Enable Y Data Outputs GND Ground VCC Power 13 14 15 Note: 1. H = High Voltage Level, L = Low Voltage Level 11-0009 3 4 E Select S2 S1 X X L L L L L H L H H L H L H H H H 1 1 01/11/10 PI5C3251 8:1 Mux/DeMux BusSwitch 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 +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only)......... –0.5V to +7.0V DC Input Voltage........................................................................... –0.5V to +7.0V DC Output Current......................................................................................120 mA 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 =5V ±5%) Parameters Description Test Conditions(1) Min. Typ(2) Max. 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 ≤ I, Y ≤ VCC ±1 VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA IOS Short Circuit VH Input Hysteresis at Control Pins RON Switch On-Resistance(4) Current(3) V 0.8 –0.7 I (Y) = 0V, Y (I) = VCC Units µA –1.2 100 V mA 150 mV VCC = Min., VIN = 0.0V, ION = 48 mA 5 7 VCC = Min., VIN = 2.4V, ION = 15 mA 10 15 Ω 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 = 5.0V, TA = 25°C ambient and maximum loading. 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 (TA = 25°C, f = 1 MHz) Parameters(1) CIN Description Typ. Input Capacitance CI(OFF) I0 - I7 Capacitance, Switch Off CY(OFF) Y Capacitance, Switch Off CI(ON) Test Conditions Max. Units 6 6 VIN = 0V I0 - I7 Capacitance, Switch On 48 35 pF 54 Notes: 1. This parameter is determined by device characterization but is not production tested. 11-0009 2 01/11/10 PI5C3251 8:1 Mux/DeMux BusSwitch Power Supply Characteristics Test Conditions(1) Min. Typ(2) Parameters Description Icc Quiescent Power Supply Current VCC = Max. VIN = GND or VCC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) Supply Current per Input per MHz(4) VCC = Max., I and Y Pins Open E = GND Control Input Toggling 50% Duty Cycle ΔIcc Iccd 0.1 Max. Units 3.0 µA 2.5 mA 0.25 mA/ MHz Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 5.0V, +25°C ambient. 3. Per TTL driven input (Vin = 3.4V, 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(1,2) In to Y tSY Bus Select Time Sn to Y tPZH tPZL Bus Enable Time E to Y tPHZ tPLZ Bus Disable Time E to Y Conditions Com. Min. Max. Unit 0.25 Cl = 50 pF Rl = 500Ω 0.5 6.6 ns 0.5 6.0 0.5 6.0 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. 11-0009 3 01/11/10 PI5C3251 8:1 Mux/DeMux BusSwitch Packaging Mechanical: 16-pin QSOP (Q) DOCUMENT CONTROL NO. PD - 1201 REVISION: G 16 .008 0.20 MIN. .150 .157 3.81 3.99 Guage Plane .010 0.254 1 DATE: 11/07/07 .008 .013 0.20 0.33 Detail A .189 .197 4.80 5.00 0˚-6˚ .016 .035 0.41 0.89 .041 1.04 REF .015 x 45° 0.38 1 .008 0.203 REF .053 1.35 .069 1.75 Detail A .007 0.178 .010 0.254 SEATING PLANE .025 BSC 0.635 .228 .244 5.79 6.19 .004 0.101 .010 0.254 .008 .012 0.203 0.305 X.XX DENOTES DIMENSIONS IN MILLIMETERS X.XX Note: 1) Controlling dimensions in inches. 2) Ref: JEDEC MO-137B/AB. 3) Dimensions do not include mold flash, protrusions or gate burrs Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 • www.pericom.com DESCRIPTION: 16-Pin 150-Mil Wide QSOP PACKAGE CODE: Q Ordering Information Ordering Code PI5C3251QE Package Code Package Description Q Pb-free & Green, 16-pin 150-mil wide QSOP Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free & Green • Adding an X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 11-0009 4 01/11/10