74HC670N – PHILIPS

Overview

The Nexperia 74HC670N is a 4×4, 4-bit, read/write, random-access memory (RAM) register designed for high-speed data buffering and storage applications. Its key operational characteristic is its ability to perform both read and write operations to any of its 16 internal storage locations, selected via address inputs. A critical design consideration when implementing this device is managing the potential for race conditions during simultaneous read and write cycles to the same address, which necessitates careful timing analysis and potentially external synchronization logic to ensure data integrity, especially in complex state machines.

Key Features

• 4×4, 4-bit Read/Write RAM Register
• CMOS Logic Family (HC)
• Supply Voltage: 2V to 6V
• Propagation Delay: 25 ns (typical)
• 3-State Outputs with High/Low Drive of ±7.8 mA
• SOT-38 Package (19.5 mm x 6.48 mm x 3.2 mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Data buffering in microcontroller peripherals
• Temporary storage for signal processing chains
• Address decoding and multiplexing in control logic
• Temporary data holding in communication interfaces