CD74HC283

具有快速进位的高速 CMOS 逻辑 4 位二进制全加器

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.

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Adds Two Binary Numbers

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Full Internal Lookahead

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Fast Ripple Carry for Economical Expansion

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Operates with Both Positive and Negative Logic

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Fanout Over Temperature Range

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

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

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Wide Operating Temperature Range . . . -55°C to 125°C

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Balanced Propagation Delay and Transition Times

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Significant Power Reduction Compared to LSTTL Logic ICs

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HC Types

\- 2V to 6V Operation

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

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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