PI5C3257 Quad 2:1 Mux/DeMux Bus Switch Features: 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 257 logic devices • Packaging (Pb-free & Green available): – 16-pin 150-mil wide plastic QSOP (Q) – 16-pin 150-mil wide plastic SOIC (W) – 16-pin 173-mil wide plasticTSSOP (L) Pericom Semiconductor’s PI5C3257 is a 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. Block Diagram Pin Configuration IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1 E S YA YB YC 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 YD Truth Table(1) Pin Description Pin Name IAn-IDn S E YA-YD GND Vcc E S YA YB YC YD Function H X Hi-Z Hi-Z Hi-Z Hi-Z Disable L L IA0 IB0 IC0 ID0 S=0 L H IA1 IB1 IC1 ID1 S=1 Note: 1. H = High Voltage Level, L = Low Voltage Level 13-0015 S 1 Description Data Inputs Select Inputs Enable Data Outputs Ground Power 01/14/13 PI5C3257 Quad 2:1 Mux/DeMux Bus Switch 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............................................................................... 120mA 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. Power Dissipation................................................................................... 0.5W 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) I (Y) = 0V, Y (I) = VCC Units V 0.8 –0.7 µA –1.2 V 100 mA 150 mV VCC = Min., VIN = 0.0V, ION = 48mA 5 7 VCC = Min., VIN = 2.4V, ION = 15mA 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 Test Conditions Input Capacitance COFF In/Yn Capacitance, Switch Off CON In/Yn Capacitance, Switch On Typ Max. Units 6 VIN = 0V 6 pF 14 Notes: 1. This parameter is determined by device characterization but is not production tested. 13-0015 2 01/14/13 PI5C3257 Quad 2:1 Mux/DeMux Bus Switch Power Supply Characteristics Parameters ICC ∆ICC ICCD Description Test Conditions(1) 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 BE = GND Control Input Toggling 50% Duty Cycle Min. Typ(2) Max. Units 0.1 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 Yn tSY Bus Select Time Sn to Yn tPZH tPZL Bus Enable Time E to Yn tPHZ tPLZ Bus Disable Time E to Yn Conditions Com. Min. Max. Units 0.25 CL = 50pF RL = 500Ω 0.5 5.2 0.5 4.8 0.5 5.0 ns 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. 13-0015 3 01/14/13 PI5C3257 Quad 2:1 Mux/DeMux Bus Switch Packaging Mechanical: 16-Pin QSOP (Q) DOCUMENT CONTROL NO. PD - 1201 REVISION: G 16 .008 0.20 MIN. .150 .157 3.81 3.99 .008 .013 0.20 0.33 Guage Plane .010 0.254 1 DATE: 11/07/07 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 .008 .012 0.203 0.305 .004 0.101 .010 0.254 .228 .244 5.79 6.19 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 13-0015 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 4 01/14/13 DATE: 0 PI5C3257 Quad 2:1 Mux/DeMux Bus Switch Packaging Mechanical: 16-Pin SOIC (W) DATE: 06/15/12 DESCRIPTION: 16-Pin, 150mil Wide SOIC PACKAGE CODE: W DOCUMENT CONTROL #: PD-1004 REVISION: F 2012-0398 13-0015 5 01/14/13 PI5C3257 Quad 2:1 Mux/DeMux Bus Switch Packaging Mechanical: 16-Pin TSSOP (L) DATE: 05/03/12 Notes: 1. Refer JEDEC MO-153F/AB 2. Controlling dimensions in millimeters 3. Package outline exclusive of mold flash and metal burr DESCRIPTION: 16-Pin, 173mil Wide TSSOP PACKAGE CODE: L DOCUMENT CONTROL #: PD-1310 REVISION: F 12-0372 Note: • For latest package info, please check: http://www.pericom.com/products/packaging/mechanicals.php Ordering Information Ordering Code Packaging Code Package Description PI5C3257QEX Q Pb-free & Green, 16-pin 150-mil wide plastic QSOP PI5C3257WEX W Pb-free & Green, 16-pin 150-mil wide plastic SOIC PI5C3257LEX L Pb-free & Green, 16-pin 173-mil wide plastic TSSOP 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 13-0015 6 01/14/13