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MC14581B 数据表(PDF) 1 Page - Motorola, Inc |
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MC14581B 数据表(HTML) 1 Page - Motorola, Inc |
1 / 7 page MOTOROLA CMOS LOGIC DATA 1 MC14581B 4-Bit Arithmetic Logic Unit The MC14581B is a CMOS 4–bit ALU capable of providing 16 functions of two Boolean variables and 16 binary arithmetic operations on two 14–bit words. The level of the mode control input determines whether the output function is logic or arithmetic. The desired logic function is selected by applying the appropriate binary word to the select inputs (S0 thru S3) with the mode control input high, while the desired arithmetic operation is selected by applying a low voltage to the mode control input, the required level to carry in, and the appropriate word to the select inputs. The word inputs and function outputs can be operated with either active high or active low data. Carry propagate (P) and carry generate (G) outputs are provided to allow a full look–ahead carry scheme for fast simultaneous carry generation for the four bits in the package. Fast arithmetic operations on long words are obtainable by using the MC14582B as a second order look ahead block. An inverted ripple carry input (Cn) and a ripple carry output (Cn+4) are included for ripple through operation. When the device is in the subtract mode (LHHL), comparison of two 4–bit words present at the A and B inputs is provided using the A = B output. It assumes a high–level state when indicating equality. Also, when the ALU is in the subtract mode the Cn+4 output can be used to indicate relative magnitude as shown in this table: Data Level Cn Cn+4 Magnitude Active High H L H L H H L L A v B A < B A > B A w B Active Low L H L H L L H H A v B A < B A > B A w B • Functional and Pinout Equivalent to 74181. • Diode Protection on All Inputs • All Outputs Buffered • Supply Voltage Range = 3.0 Vdc to 18 Vdc • Capable of Driving Two Low–power TTL Loads or One Low–power Schottky TTL Load over the Rated Temperature Range MAXIMUM RATINGS* (Voltages Referenced to VSS) Symbol Parameter Value Unit VDD DC Supply Voltage – 0.5 to + 18.0 V Vin, Vout Input or Output Voltage (DC or Transient) – 0.5 to VDD + 0.5 V Iin, Iout Input or Output Current (DC or Transient), per Pin ± 10 mA PD Power Dissipation, per Package† 500 mW Tstg Storage Temperature – 65 to + 150 _C TL Lead Temperature (8–Second Soldering) 260 _C * Maximum Ratings are those values beyond which damage to the device may occur. †Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW/ _C From 65_C To 125_C Ceramic “L” Packages: – 12 mW/ _C From 100_C To 125_C MOTOROLA SEMICONDUCTOR TECHNICAL DATA © Motorola, Inc. 1995 REV 3 1/94 MC14581B L SUFFIX CERAMIC CASE 623 ORDERING INFORMATION MC14XXXBCP Plastic MC14XXXBCL Ceramic MC14XXXBDW SOIC TA = – 55° to 125°C for all packages. P SUFFIX PLASTIC CASE 709 DW SUFFIX SOIC CASE 751E PIN ASSIGNMENT S0 S2 S3 A0 B0 MC Cn S1 B2 A2 B1 A1 VDD P Cn+4 G 5 4 3 2 1 10 9 8 7 6 14 15 16 17 18 19 20 13 11 12 21 22 23 24 F3 A = B B3 A3 F2 VSS F1 F0 |
类似零件编号 - MC14581B |
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类似说明 - MC14581B |
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