PI5C3257C 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Quad 2:1 Mux/Demux BusSwitch with –2V Undershoot Protection Product Features Product Description • • • • • • Pericom Semiconductor’s PI5C series of logic circuits are produced using the Company’s advanced submicron CMOS technology, achieving industry leading performance. The PI5C3257C is a Quad 2:1 multiplexer/demultiplexer with threestate outputs that is pinout and function compatible with the PI74FCT257T. Inputs can be connected to outputs with low on resistance (5ohms) with no additional ground bounce noise or propagation delay. Near zero propagation delay 5ohms switches connect inputs to outputs Direct bus connection when switches are ON Undershoot Protection to –2V (Data Inputs Only) Pin compatible with 74 series 257 logic devices Packages available: – 16-pin 150 mil wide plastic QSOP (Q) – 16-pin 173 mil wide plastic TSSOP (L) 16-Pin Product Configuration Logic Block Diagram IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1 E S S 1 16 VCC IA0 2 15 E IA1 3 14 ID0 YA 4 13 ID1 IB0 5 16-Pin L,Q 12 IB1 6 11 IC0 YB 7 10 IC1 GND 8 9 YC YD Product Pin Description Pin Name YA YB YC YD Truth Table(1) De s cription IAN- IDN Data Inputs S Select Inputs E Enable YA- YD Data Outputs E S YA YB YC YD Function H X Hi- Z Hi- Z Hi- Z Hi- Z Disable GND Ground L L IA0 IB0 IC0 ID0 S=0 Vcc Power L H IA1 IB1 IC1 ID1 S=1 NC No Connect Note: 1. H = High Voltage Level L = Low Voltage Level 1 PS8513 02/21/01 PI5C3257 Quad 2:1 Mux/Demux BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 with –2V Undershoot Protection 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 (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 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. 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 Input LOW Current IOZH High Impedance Output Current 0 ≤I, Y ≤VCC VIK Clamp Diode Voltage VUP Undershoot Protection Voltage RON Switch On Resistance(4) (3) Typ(2) Max. Units V 0.8 V VCC = Max., VIN = VCC ±1 µA VCC = Max., VIN = GND ±1 µA ±1 µA VCC = Min., IIN = –18mA –1.8 V Max Inputs, Undershoot Pulse Duration <25ns –2.0 V 7 15 ohms VCC = Min., VIN = 0.0V, VCC = Min., VIN = 2.4V, ION = 48mA ION = 15mA 4 8 Capacitance (TA= 25°C, f = 1 MHz) Parameters(5) Description Test Conditions CIN COFF Input Capacitance IN/YN Capacitance, Switch Off CON IN/YN 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 and 1BIN (Data Input) 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 PS8513 02/21/01 PI5C3257 Quad 2:1 Mux/Demux BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 with –2V Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. Typ(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 100 µA ∆ICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) 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 PI5C3257C Com. Description Conditions(1) CL = 50pF RL = 500ohms tPZH tPZL Propagation Delay(2,3) IN to YN Bus Select Time SN to YN Bus Disable Time E to YN tPHZ Bus Disable Time tPLZ E to YN Parameters tIY t SY Min Max Units 0.25 7.0 30.0 7.0 30.0 1.5 8.8 ns 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. Applications Information Logic Inputs The 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 R 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 PS8513 02/21/01 PI5C3257 Quad 2:1 Mux/Demux BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 with –2V Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 16 -TSSOP (L) Package Mechanical 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 .002 .006 .007 .012 .0256 BSC 0.65 0.09 0.20 .252 BSC 6.4 0.05 0.15 0.19 0.30 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS 16 - QSOP (Q) Package Mechanical 16 .150 .157 3.81 3.99 .015 x 45° 0.38 1 .007 .010 .189 .197 4.80 5.00 0.178 0.254 0.41 .016 1.27 .050 .008 0.203 REF .228 .244 5.79 6.19 .053 1.35 .069 1.75 SEATING PLANE .008 .012 0.203 0.305 .025 BSC 0.635 .004 0.101 .010 0.254 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Ordering Information Part Pin-Package Te mpe rature PI5C3257CL 16 TSSOP (L) –40°C to +85°C PI5C3257CQ 16 QSOP (Q) –40°C to +85°C Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 4 PS8513 02/21/01