74HC283D,653

Overview

The 74HC283D,653 is a high-speed Si-gate CMOS 4-bit binary full adder with fast carry. It adds two 4-bit binary words plus an incoming carry to produce sum outputs and an outgoing carry. The device operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. Propagation delays vary by output stage; typical values at 5.0 V include 16 ns for CIN to S1 and 23 ns for CIN to S4. Input capacitance is specified at 3.5 pF.

Feature Summary

• High-speed 4-bit binary addition capability
• Fast internal look-ahead carry mechanism
• Pin compatible with low power Schottky TTL (LSTTL)
• ESD protection exceeding 2000 V per HBM standard

Applications

• Cascaded multi-bit binary addition circuits
• Digital arithmetic logic units
• Address calculation hardware

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74HC283 family includes DIP, SO, SSOP, and TSSOP variants. Confirm the temperature grade corresponds to the application environment requirements. Check current product status on official manufacturer channels to ensure availability, as production status may change without notice.

Selection Notes

Select this component when a 4-bit binary adder with fast carry propagation is required in a CMOS process. Ensure the system supply voltage falls within the 2.0 V to 6.0 V operating range. Verify that the input logic levels are compatible with the HC family thresholds. Consider the thermal dissipation limits if operating at maximum ambient temperatures or high switching frequencies.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices manufactured by NXP USA Inc. The 74HC283 specifically implements a 4-bit binary full adder function. It is designed to be pin-compatible with older LSTTL standards, facilitating migration from legacy designs while offering lower power consumption and higher speed performance characteristics.

Replacement Considerations

The 74HCT283 is a related variant within the same datasheet family, though it utilizes different logic level specifications.