257 AVG semiconductors DDi~ echnical Data DV74HCT257 Available G2, 1995 Quad 2-Input Data Selector/ DV74HC257 Multiplexer with 3-State Outputs DV74HCT257 This device selects a 4-bit nibble from either A or B inputs as determined by the Select input. The nibble is pre- sented at the outputs in noninverted form when the Output Enable pin is at a low level. A high level on the Output N Suffix Enable pin switches the outputs into the high-impedance Plastic DIP state. The HC257 is similar in function to the HC157 which AVG-003 Case does not have 3-state outputs. * Output Drive Capability: 15 LSTTL Loads D Suffix * Outputs Directly Interface to CMOS, NMOS, and TTL Plastic SOP * Operating Voltage Range: 2 to 6 V for HC device AVG-004 Case Low Input Current: 1A * DC, AC parameters guaranteed from -55C to 125C (1 2 ~ | TRUTH TABLE Ay + A PUT my es _ BIN ASSIGNMENT Inputs Outputs | Select ci 1 16!) ee lente Select, YO-3 ao 1] 2 15 ') Outpet Enable H x 2 a0 5; 1 ao [ 3 1a J AS L L A0-A3 se fF io EE is eqs = ss t_| H | 60-83 = 5 al 4 12) ) v3 H = High Logic Level of je vi) ) az L = Low Logic Lovel scuct __ Ty ti? 10] ) #2 AO-A3, BO-B3 = the levels ow Cs soe of tho respective Nibble oulreul 1s _ : Inputs EARLE Z=High Impedance rn 16 . lige X = Don't Care ABSOLUTE MAXIMUM RATINGS Maximum ratings are those values beyond which damage to the device may occur. __ Symbol Parameter Value Unit Vec | DC Supply Voltage (Referenced to GND) -0.5 to +7,0 Vv Vin DC Input Vokage (Referenced to GND) 1.5to Veo +1.5 Vv Vour__| OC Output Voltage (Referenced to GND) 0.5 to Voc +0.5 Vv lay DC Input Current, per Pin +20 mA, Lour DC Output Current, per Pin +35 mA lec DC Supply Current. Voc and GND Pins +75 mA Pp Power Dissipation in Still Air, Plastic DIP 750 mi SOP Package 500 TstG__| Storage Temperature Range -65 to +150 % Tt Lead Tomporature, 1mm from Case for 10 Seconds 260 "C GUARANTEED OPERATING CONDITIONS Symbol | Parameter Min Max Unit Vec DC Supply Voltage HC(HCT), Referenced to GND 2.0(4.5) 6,0(5.5) V Vin, Vout | DC Input Voltage, Output Voltage ,Referenced to GND 0 Vec V Ta | Ambient Temperature 55 +125 *c tr, te Input Rise and Fall Time: HC: Vcc=2.0V 0 1000 ns HCT: Veo=5.5V/ HC: Veced.5V 0 500 HC: Vee=6.0V 0 400 DV74HC257, DVT4HCT257 5-146 1-800-AVG-SEMIDC ELECTRICAL CHARACTERISTICS Symbol Parameter Conditions Vec Guaranteed Limits | Unit Vo} 28 = <85C | <125C | to | 55C | _ Vin | Minimum High-Level llourl<20uA 2.0 1.5 1.5 1.5 vo Input Voltage 4.5 3.15 3.15 3.15. fe 6.0 4.2 4.2 42 Vi. | Maximum Low- Level llourl<20uA 2.0 0.3 0.3 0.3 Vv Input Voltage 4.5 0.9 0.9 0.9 6.0 | 1.2 1.2 120) Vox | Minimum High-Level Vin = Vie or Vie 2.0 1.9 1.9 1.9 V Output Voltage llourls 20 pA 4.5 44 | 44 440 6.0 59 | 5.9 ae Vin = Vie or Vic, Hlourl<6.0mA 4.5 3.98 3.84 3.7 lloutl< 7.6 mA 6.0 5.48 5.d4 5.2 Vou Maximum Low Level Vin = Vin or Vi, 2.0 0.1 0.1 01 | Vv Output Voltage llourl<s 20 pA 4.5 0.1 0.1 0.1 6.0 0.1 0.1 0.1 Vin = Vin or Vir, lourls 6.0mA 4.5 0.26 0.33 0.40 V llourls 7.8 mA 6.0 0.26 0.33 0.40 lin Maximum Input Vin = Vec or GND 6.0 +0.1 | 10 | +10 pA Leakage Current loz Maximum Three-State Output in High-lmpedence State 6.0 +0.5 +5.0 | +100 pA Leakage Current Vin=Vic or Vin Vout=Vec or GND lec | Maximum Quiescent Vin = Vec or GND 6.0 8.0 80 160 pA Supply Current (Per llourl=0 iA Package) ; | AC ELECTRICAL CHARACTERISTICS over full operating conditions(CL-50pF, Input tf-t-6ns) Symbol Parameter Vec Guaranteed Limit Unit Vi | 25c | <e5%c | <125C to 55C tpt, | Maximum Propagation Delay Time, 2.0 100 125 150 ns tPHL Nibble A or B to Output 45 20 25 30 6.0 17 21 26 tpt, | Maximum Propagation Delay Time, 2.0 100 125 150 ns tex. =| Select to Output 45 20 25 30 6.0 17 21 26 - teLz, | Maximum Propagation Delay Time, 2.0 150 190 225 ns texz | Output Disable to Output Y 45 30 38 45 6.0 26 a3 38 tez., | Maximum Propagation Delay Time, 2.0 150 190 225 ns tpzH | Output Enable to Output Y 4.5 30 38 45 6.0 26 33 38 trun, | Maximum Output Transition Time 2.0 60 75 90 ns tra. =| Any Output 4.5 12 15 18 6.0 10 13 15 Cin =| Maximum Input Capacitance _ 10 10) | 610 | pF Cour | Maximum Three-State Output Capacitence (Output High- 15 15 15 pF Impedance) Cpp | Power Dissipation Capacitance (Per Multiplexer) Typical @ 25C, Vec =5 V Used to determine the no-load dynamic power consumption, 39 pF Po = Ceo Vec*l + lec Veo 1-800-AVG-SEMI 5-147 DV7T4HC257, DV74HCT257 LS257 DC ELECTRICAL CHARACTERISTICS Symbo Parameter Conditions Vec Guaranteed Limits Unit | (VY) | 25% | <85C | < 125C to 55C Viv Minimum High Level Vour = Veco0.1 V 45 2.0 2.0 2.0 V Input Voltage lloutl < 20 A 5.5 2.0 2.0 2.0 ViL Maximum Low Level Vour = 0.1V or 45 0.8 0.8 0.8 V Input Voltage Vec-0.1 V 5.5 0.8 0.8 0.8 llour! < 20 WA Von Minimum High Level Vin = Vin 4.5 4.4 4.4 4.4 V Output Voltage lout! < 20 wA 5.5 5.4 5.4 5.4 Vin = Vin llourl < 6.0 mA 45 3.98 3.84 3.70 V Vor Maximum Low Level Vie = Vin 45 0.1 0.1 0.1 V Output Voltage Hloumi < 20 A 5.5 0.1 0.1 0.1 Vin = Vie llourl = 6.0 mA 45 0.26 0.33 0.40 Vv lia Maximum Input Leakage Current Vin=Vec or GND, 5.5 +0.1 +1.0 +1.0 pA Pins 1 or 19 loz Maximum 3-State Current Vin=Vit or Vii 5.5 +0.5 +5.0 +10.0 mA (Output in High Impedence State) Vour=Vec or GND, W/O Pins lec Maximum Quiescent Supply Current | Vin = Vec or GND 6.0 4 40 160 nA lout = 0 pA Alee | Additional Quiescent Supply Vin=2.4 V, Any One Input -55C to| 25C to Current (per Package) Vin= Vee or GND, 5.5 | 25C 125C AC ELECTRICAL CHARACTERISTICS over full operating conditions ( F, Input t s Symbol Parameter Vee Guaranteed Limit Unit Vs} 25% | <a5 | <125C to 55C tpLH, | Maximum Propogation Delay Time, af 46 56 ns tex. | Input D to Output or tpL4, | Maximum Propogation Delay Time, 41 51 62 ns tpH. | Input Ato Output Y or tpLz, | Maximum Propogation Delay Time, 39 49 59 tpuz | Output Enable to Output Y 5.0 tez_, | Maximum Propogation Delay Time, +10% 29 36 44 tpzy | Output Enable to Output tpLz, | Maximum Propogation Delay Time, ae 55. 66 ns tpuz | Output Enable to Output tez.. | Maximum Propogation Delay Time, 30 38 45 ns tezH | Output Enable to Output Y try, | Maximum Output Transition Time 15 19 22 ns tro. =| Any Output Cin Maximum Input Capacitance 10 10 10 pF Cour | Maximum Three-State Output Capacitence -- 15 15 15 pF (Output High-lmpedance} Cep | Power Dissipation Capacitance (Per Package) Typical @ 25C, Vec=5V | Used to determine the no-load dynamic power consumption, 36 pF Po = Creo Voc! + lec Vec DV74HC257, DV74HCT257 5-148 1-800-AVG-SEMISWITCHING WAVEFORMS GND tie High impedances Enable X Vr xX vt t py 1 Y oy L90% Vee High Impedance Input and Output Threshold Voltage: Vr = 50% Vee for HC, 1.3V for HCT, Vu = Voc for HC, 3V for HCT 1-800-AVG-SEMI 5-149 DV74HC257, DV74HCT257 LS