M74HC299RM13TR

Shift Registers Overview

The M74HC299RM13TR is an 8-bit PIPO shift register with asynchronous clear and 3-state outputs, fabricated using silicon gate C2MOS technology. It operates within a supply voltage range of 2V to 6V and supports a maximum clock frequency of 80MHz at 6V. The device features symmetrical output impedance with minimum source/sink currents of 6mA for QA' to QH' and 4mA for QA to QH. Propagation delays from CLOCK to QA'/QH' range from 17ns to 51ns depending on voltage and temperature. Quiescent supply current is limited to 4μA maximum at 25°C.

Shift Registers Feature Summary

• Supports four operational modes: HOLD, SHIFT LEFT, SHIFT RIGHT, and LOAD DATA, selected via two function select inputs.
• Features asynchronous master reset (CLEAR) input that functions independently of the clock signal.
• Includes protection circuits against static discharge and transient excess voltage on all inputs.

Shift Registers Applications

• Parallel-to-serial or serial-to-parallel data conversion in digital systems
• Bus driver applications requiring 3-state output control
• General-purpose shift register operations in high-speed CMOS logic designs

Shift Registers Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm RoHS compliance status and check for specific manufacturing date codes relevant to your production timeline. Ensure proper ESD handling procedures are followed during storage and assembly due to the CMOS technology used.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel I/O capability and 3-state bus driving is required. Consider the wide operating voltage range and high noise immunity for robust performance in varying electrical environments. Verify package compatibility with SOP-20 footprint constraints before finalizing design integration.

Shift Registers Part Context

This part belongs to the M74HC299 series of high-speed CMOS logic devices manufactured by STMicroelectronics. It is pin and function compatible with standard 74 Series 299 equivalents, facilitating drop-in replacements in legacy designs while offering improved speed and lower power dissipation characteristics typical of modern HC logic families.

Shift Registers Replacement Considerations

Direct substitutes include other manufacturers' 74HC299 variants in SOP-20 packages. Verify electrical parameters such as propagation delay and output drive strength match original design requirements. Check for any differences in absolute maximum ratings or thermal dissipation capabilities if replacing with non-ST parts.