PI5C3253C 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Dual 4:1 Mux/DeMux Bus Switch with –2V Undershoot Protection Features Description • • • • • • Pericom Semiconductor’s PI5C3253C is a Dual 4:1 multiplexer/ demultiplexer with three-state outputs that is pinout compatible with the PI74FCT253T. Inputs can be connected to outputs with low OnResistance (5-ohm) with no additional ground bounce noise or propagation delay. Near-Zero propagation delay 4-ohm switches connect inputs to outputs Direct bus connection when switches are ON Undershoot protection to –2V (Data Inputs Only) Pin compatible with 74 series 253 logic devices Packaging (Pb-free & Green available): – 16-pin 173-mil wide plastic TSSOP (L) Block Diagram Pin Configuration IB3 IB2 YB IB1 IB0 IA3 IA2 YA IA1 IA0 EA EB S0 EA 1 16 VCC S1 2 15 EB IA3 3 14 S0 IA2 4 13 IB3 IA1 5 12 IB2 IA0 6 11 IB1 YA 7 10 IB0 GND 8 9 YB S1 Pin Description Truth Table(1) Pin Name De s cription Enable Se le ct Channe l Enable EA EB S1 S0 YA YB S 0- 1 Select Inputs H X X X Hi- Z X Disable A 1AN,1BN Data Inputs X H X X X Hi- Z Disable B Data Outputs L L L L IA0 IB0 S1- 0 = 0 VCC Power Supply Pin L L L H IA1 IB1 S1- 0 = 1 GND Ground L L H L IA2 IB2 S1- 0 = 2 L L H H IA3 IB3 S1- 0 = 2 EA, EB YA, YB Function Note: 1. H = High Logic Voltage Level L = Low Logic Voltage Level Hi-Z = High Impedance 1 PS8490C 11/18/04 PI5C3253C Dual 4:1 Mux/DeMux Bus Switch with –2V Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 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 ......................................... –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%) Test Conditions(1) Parameters Description Min. VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 IIH Input HIGH Current IIL Typ.(2) Max. Units V 0.8 V VCC = Max., VIN = VCC ±1 µA Input LOW Current VCC = Max., VIN = GND ±1 µA IOZH High Impedance Output Current 0 ≤ IN, YN ≤ VCC ±1 µA VIK Clamp Diode Voltage VCC = Min., IIN = –18mA –1.8 V –2.0 V 7 15 ohm VUP RON Undershoot Protection Switch On Voltage(3) Resistance(4) –0.7 Max Inputs, Undershoot Pulse Duration <25ns VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA 4 8 Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) Description Test Conditions CIN COFF Input Capacitance IA/IB Capacitance, Switch Off CON IA/IB Capacitance, Switch On Typ. Max. Units VIN = 0V VIN = 0V 6 6 pF pF VIN = 0V 14 pF 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. On 1AN & 1BN (Data Inut) pins only. 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 PS8490C 11/17/04 PI5C3253C Dual 4:1 Mux/DeMux Bus Switch with –2V Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Parame te rs Te s t Conditions (1) De s cription Quiescent Power Supply Current ICC ∆ICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = GND or VCC 3.4V(3) VIN = M in. Typ(2) M ax. Units –– –– 10 0 µA –– –– 2.5 mA 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. Switching Characteristics over Operating Range PI5C3253C Com. Parame te rs De s cription tIY Propagation Delay(2,3) In to Yn tSY Bus Select time Sn to Yn tPZH tPZL Bus Enable Time En to Yn tPHZ tPLZ Bus Disable Time En to Yn Conditions (1) M in. M ax. Units 0.25 C L = 50pF RL = 500 ohms 0.5 4.5 ns 0.5 4.0 0.5 4.5 Notes: 1. See test circuit and waveforms. 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. Application Information Logic Inputs Logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a 5.0V supply, the control or select pins may be driven low to 0V and high to 5.5V. Driving the control or select pins Rail-toRail® minimizes power consumption. Power -Supply Sequencing Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying signals to the input/output or control pins. 3 PS8490C 11/17/04 PI5C3253C Dual 4:1 Mux/DeMux Bus Switch with –2V Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical: 16-Pin TSSOP (L) 16 .169 .177 4.3 4.5 1 .193 .201 4.9 5.1 .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 0.19 0.30 Ordering Information Ordering Code PI5C3253CL PI5C3253CLE Package Code L L Package Type 16-pin 150-mil wide plastic TSSOP Pb-free & Green, 16-pin 150-mil wide plastic 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 4 PS8490C 11/17/04