CD74HC283ME4

高速CMOS逻辑4位二进制全加器与快速进 High-Speed CMOS Logic 4-Bit Binary Full Adder with Fast Carry

Description

The ’HC283 and ’HCT283 binary full adders add two 4-bit binary numbers and generate a carry-out bit if the sum exceeds 15.

Because of the symmetry of the add function, this device can be used with either all active-high operands positive logic or with all active-low operands negative logic. When using positive logic the carry-in input must be tied low if there is no carry-in.

Features

• Adds Two Binary Numbers

• Full Internal Lookahead

• Fast Ripple Carry for Economical Expansion

• Operates with Both Positive and Negative Logic

• Fanout Over Temperature Range

  - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

  - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55℃ to 125℃

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL Logic ICs

• HC Types

  - 2V to 6V Operation

  - High Noise Immunity: NIL= 30%, NIH= 30% of VCC at VCC= 5V

• HCT Types

  - 4.5V to 5.5V Operation

  - Direct LSTTL Input Logic Compatibility, VIL= 0.8V Max, VIH = 2V Min

  - CMOS Input Compatibility, Il ≤1µA at VOL, VOH