PI5C3125 PI5C3126 4-Bit Bus Switch with Individual Enables Features Description • Near-Zero propagation delay Pericom Semiconductor’s PI5C3125 and PI5C3126 are 4-bit Bus Switches designed with four individual 5Ω bus switches with fast indiviual enables in an industry standard 74XX125/126 pinout. When enabled via the associated Bus Enable (BE) pin, the “A” pin is directly connected to the “B” pin for that particular gate. The bus switch introduces no additional propagation delay or additional ground bounce noise. • 5Ω switches connect inputs to outputs • Direct bus connection when switches are ON • Ultra Low Quiescent Power (0.1µA Typical) – Ideally suited for notebook applications • Packaging (Pb-free & Green available): – 14-pin 150-mil wide plastic SOIC (W) – 14-pin 173-mil wide plastic TSSOP (L) – 16-pin 150-mil wide plastic QSOP (Q) The PI5C3125 device has active LOW enables, and the PI5C3126 has active HIGH enables. PI5C3125 Block Diagram A0 PI5C3126 Block Diagram A0 B0 BE0 BE0 A1 A1 B1 A2 B2 B2 BE2 BE2 A3 B1 BE1 BE1 A2 B0 A3 B3 B3 BE3 BE3 1 PS7013F 09/13/04 PI5C3125/3126 4-Bit Bus Switch w/Individual Enables PI5C3126 14-Pin Configuration PI5C3125 14-Pin Configuration BE0 A0 B0 BE1 A1 B1 GND 1 14 2 13 3 14-Pin 12 4 L,W 11 5 10 6 9 7 8 BE0 A0 B0 BE1 A1 B1 GND Vcc BE3 A3 B3 BE2 A2 B2 PI5C3125 16-Pin Configuration NC BE0 A0 B0 BE1 A1 B1 GND 1 16 2 15 3 16-Pin 14 4 Q 13 5 12 6 11 7 10 8 9 1 14 2 13 3 14-Pin 12 4 W, L 11 5 10 6 9 7 8 Vcc BE3 A3 B3 BE2 A2 B2 PI5C3126 16-Pin Configuration NC BE0 A0 B0 BE1 A1 B1 GND Vcc BE3 A3 B3 BE2 A2 B2 NC 1 16 2 15 3 16-Pin 14 4 Q 13 5 12 6 11 7 10 8 9 Vcc BE3 A3 B3 BE2 A2 B2 NC Truth Table(1) Pin Description Pin Name Description BEn Switch Enable (PI5C3125) BEn Switch Enable (PI5C3126) A3-A0 Bus A B3-B0 Bus B VCC Power GND Ground PI5C3125 PI5C3126 BEn BEn An Bn VCC Function X(2) X Hi-Z Hi-Z GND Disconnect H L Hi-Z Hi-Z VCC Disconnect L H Bn An VCC Connect Notes: 1. H = High Voltage Level, L = Low Voltage Level, HI-Z = High Impedance, X = Don’t Care 2. A pull-up resistor should be provided for power-up protection. 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 Power Dissipation ..........................................................................................0.5W 2 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. PS7013F 09/13/04 PI5C3125/3126 4-Bit Bus Switch w/Individual Enables DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ± 10%) Parameters Test Conditions(1) Description Min. Typ(2) Max. Units 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 ≤ A, B ≤ VCC ±1 VIK Clamp Diode Voltage VCC = Min., IIN = –18mA –0.7 IOS Short Circuit A (B) = 0 V, B (A) = VCC 100 mA VH Input Hysteresis at Control Pins 150 mV RON On-Resistance(4) Switch Current(3) 0.8 –1.2 VCC = Min., VIN = 0.0V, ION = 48mA 5 7 VCC = Min., VIN = 2.4V, ION = 15mA 10 15 VCC = 4V, VIN = 2.4V, ION = 15mA 16 V µA V Ω 22 Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) Description CIN Input Capacitance COFF A/B Capacitance, Switch Off CON A/B Capacitance, Switch On Test Conditions Typ. Max. Units 6 VIN = 0V 6 pF 8 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 A and B pin at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (A, B) pins. 5. This parameter is determined by device characterization but is not production tested. Power Supply Characteristics Parameters Description Test Conditions(1) 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., A and B Pins Open BEn/BEn = GND Control Input Toggling 50% Duty Cycle ICCD 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); A and B 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 A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design. 3 PS7013F 09/13/04 PI5C3125/3126 4-Bit Bus Switch w/Individual Enables Switching Characteristics over Operating Range Parameters tPLH tPHL Propagation Delay(2,3) A to B, B to A tPZH tPZL Bus Enable Time tPLZ tPHZ Bus Disable Time Com. Conditions(1) Description Min. Units Max. 0.25 CL = 50pF RL = 500Ω 0.5 5.4 0.5 4.7 ns 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 0.25ns 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. Packaging Mechanical: 14-Pin TSSOP (L) 14 0.169 0.177 1 0.0256 typical 0.65 0.193 0.201 4.90 5.10 0.007 0.012 0.19 0.30 0.004 0.09 0.008 0.20 4.3 4.5 0.45 0.018 0.75 0.030 0.240 0.264 6.1 6.7 0.047 1.20 max. X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS SEATING PLANE 0.002 0.05 0.006 0.15 4 PS7013F 09/13/04 PI5C3125/3126 4-Bit Bus Switch w/Individual Enables Packaging Mechanical: 14-Pin SOIC (W) 14 .0099 .0196 3.78 3.99 .149 .157 0.25 x 45˚ 0.50 .0075 .0098 0-8˚ 1 0.41 .016 1.27 .050 .336 .344 8.55 8.75 .0155 .026 0.393 0.660 .053 .068 .2284 .2440 5.80 6.20 1.35 1.75 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS SEATING PLANE REF .050 BSC 1.27 0.19 0.25 .0040 0.10 .0098 0.25 .013 .020 0.330 0.508 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 0.178 .010 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 5 PS7013F 09/13/04 PI5C3125/3126 4-Bit Bus Switch w/Individual Enables Ordering Information Ordering Code PI5C3125L PI5C3125LE PI5C3125W PI5C3125WE PI5C3125Q PI5C3125QE PI5C3126L PI5C3126LE PI5C3126W PI5C3126WE PI5C3126Q PI5C3126QE Package Type L L W W Q Q L L W W Q Q Package Description 14-pin TSSOP Pb-free & Green, 14-pin TSSOP 14-pin SOIC Pb-free & Green, 14-pin SOIC 14-pin QSOP Pb-free & Green, 14-pin QSOP 14-pin TSSOP Pb-free & Green, 14-pin TSSOP 14-pin SOIC Pb-free & Green, 14-pin SOIC 14-pin QSOP Pb-free & Green, 14-pin QSOP Notes: 1. 2. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ X = Tape and reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 6 PS7013F 09/13/04