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 (0.2 µA 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) – 16-pin 300-mil wide plastic SOIC (S) – 16-pin 150-mil wide plastic SOIC (W) – 16-pin 173-mil wide plastic TSSOP (L) 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. 5 Pin Configuration I1 I2 I3 I4 I5 I6 I7 6 I3 1 16 VCC I2 2 15 I4 I5 E I1 3 14 S0 I0 4 13 I6 S1 Y 5 12 I7 S2 NC 6 11 S0 E 7 10 S1 8 9 S2 GND Y Truth Table(1) E H L L L L L L L L Select S2 S1 X X L L L L L H L H H L H L H H H H 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 3 4 Block Diagram I0 1 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 1 PS7016B 09/14/04 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 V 100 mA 150 mV VCC = Min., VIN = 0.0V, ION = 48 mA 5 7 VCC = Min., VIN = 2.4V, ION = 15 mA 10 15 Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) Description CIN Input Capacitance CI(OFF) I0 - I7 Capacitance, Switch Off CY(OFF) Y Capacitance, Switch Off CI(ON) I0 - I7 Capacitance, Switch On Test Conditions Typ. Max. Units 6 6 VIN = 0V 48 35 pF 54 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. 5. This parameter is determined by device characterization but is not production tested. 2 PS7016B 09/14/04 PI5C3251 8:1 Mux/DeMux BusSwitch Power Supply Characteristics Parameters Test Conditions(1) Description Min. Typ(2) ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ΔICC 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 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(2,3) 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(1) 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. See test circuit and wave forms. 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 0.25 ns for 50 pF 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. 3 PS7016B 09/14/04 PI5C3251 8:1 Mux/DeMux BusSwitch 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 Packaging Mechanical: 16-pin SOIC (S) 16 .2914 .2992 7.40 7.60 .010 0.254 x 45˚ .029 0.737 1 .398 10.10 .413 10.50 .020 0.508 .030 0.762 0.41 .016 1.27 .050 .0926 2.35 .1043 2.64 .394 .419 10.00 10.65 SEATING PLANE .050 BSC 1.27 .0091 0.23 .0125 0.32 0-8˚ .013 .020 0.33 0.51 .0040 .0118 0.10 0.30 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS 4 PS7016B 09/14/04 PI5C3251 8:1 Mux/DeMux BusSwitch Packaging Mechanical: 16-pin SOIC (W) 16 3.78 3.99 .149 .157 .0099 .0196 0.25 x 45˚ 0.50 1 .0075 .0098 0-8˚ .386 .393 9.80 10.00 0.41 1.27 .053 .068 .0155 .0260 0.393 0.660 REF 1.35 1.75 .016 .050 .2284 .2440 5.80 6.20 SEATING PLANE .050 BSC 1.27 0.19 0.25 .0040 0.10 .0098 0.25 .013 .020 0.330 0.508 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Packaging Mechanical: 16-pin TSSOP (L) 16 .169 .177 1 .193 .201 4.9 5.1 4.3 4.5 .004 .008 .047 max. 1.20 0.45 .018 0.75 .030 SEATING PLANE .0256 BSC 0.65 .007 .012 .002 .006 0.09 0.20 .252 BSC 6.4 0.05 0.15 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS 0.19 0.30 5 PS7016B 09/14/04 PI5C3251 8:1 Mux/DeMux BusSwitch Ordering Information Ordering Code Package Code Package Description PI5C3251Q Q 16-pin 150-mil wide QSOP PI5C3251QE Q Pb-free & Green, 16-pin 150-mil wide QSOP PI5C3251S S 16-pin 300-mil wide SOIC PI5C3251SE S Pb-free & Green, 16-pin 300-mil wide SOIC PI5C3251W W 16-pin 150-mil wide SOIC PI5C3251WE W Pb-free & Green, 16-pin 150-mil wide SOIC PI5C3251L L 16-pin 173-mil wide TSSOP PI5C3251LE L Pb-free & Green, 16-pin 173-mil wide TSSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 6 PS7016B 09/14/04