MC74LCX257 Motorola, MC74LCX257 Datasheet
MC74LCX257
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MC74LCX257 Summary of contents
Page 1
... High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance specification of 5.5V allows MC74LCX257 inputs to be safely driven from 5V devices. Four bits of data from two sources can be selected using the Select input. The four outputs present the selected data in the true (non– ...
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... MC74LCX257 2 I0a 3 I1a 5 I0b 6 I1b 14 I0c 13 I1c 11 I0d 10 I1d TRUTH TABLE Inputs High Voltage Level Low Voltage Level High or Low Voltage Level High Impedance State; For I CC Reasons DO NOT FLOAT Inputs MOTOROLA LOGIC DIAGRAM ...
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... V CC 3.6V –100 2.7V –12mA 3.0V –18mA 3.0V –24mA 2. 3.6V 100 2.7V 12mA 3.0V 16mA 3.0V 24mA 3 MC74LCX257 Condition Unit V V Output in 3–State V Note < GND < GND > ...
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... MC74LCX257 DC ELECTRICAL CHARACTERISTICS Symbol Characteristic I I Input Leakage Current I OZ 3–State Output Current I OFF Power–Off Leakage Current I CC Quiescent Supply Current I CC Increase per Input AC CHARACTERISTICS ( 2.5ns 50pF 500 ) Symbol Parameter t PLH Propagation Delay t PHL ...
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... 2.5ns, 10 1MHz 500ns 1.5V 1.5V t PHZ 1.5V t PLZ 1.5V WAVEFORM 3 – OUTPUT ENABLE AND DISABLE TIMES 2.5ns, 10 1MHz 500ns Figure 1. AC Waveforms V CC DUT TEST Figure 2. Test Circuit 5 MC74LCX257 2.7V 1. PHL V OH 1. – 0. 0.3V GND ...
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... MC74LCX257 –A – –T – SEATING PLANE 0.25 (0.010 0.10 (0.004) 0.13 (0.005) M MOTOROLA OUTLINE DIMENSIONS D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J – – 0.25 (0.010 ...
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... K1 SECTION N–N –W– DETAIL E 7 MC74LCX257 NOTES: 6 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 7 CONTROLLING DIMENSION: MILLIMETER. 8 DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0 ...
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... C ––– 1.20 ––– 0.047 D 0.05 0.15 0.002 0.006 F 0.50 0.75 0.020 0.030 –W– G 0.65 BSC 0.026 BSC H 0.18 0.28 0.007 0.011 J 0.09 0.20 0.004 0.008 J1 0.09 0.16 0.004 0.006 K 0.19 0.30 0.007 0.012 K1 0.19 0.25 0.007 0.010 L 6.40 BSC 0.252 BSC MC74LCX257/D LCX DATA BR1339 — REV 3 ...