N74F299N,602

Shift Registers Overview

The N74F299N,602 is an 8-bit universal shift/storage register with 3-State outputs manufactured by NXP USA Inc. It operates within a supply voltage range of 4.5V to 5.5V and supports a commercial temperature range of 0°C to +70°C. The device features four operating modes: hold, shift left, shift right, and parallel load. It includes serial inputs for expansion and separate outputs for Q0 and Q7. The maximum clock frequency is 115 MHz at typical conditions. Total supply current is typically 58 mA.

Shift Registers Feature Summary

• Multiplexed parallel I/O pins reduce total package pin count
• Four distinct operating modes including synchronous shift and parallel load
• Separate serial outputs allow easy cascading for longer word lengths
• Active-LOW Master Reset overrides select and clock inputs

Shift Registers Applications

• Bus-oriented applications requiring 3-State output control
• Serial-to-parallel and parallel-to-serial data conversion systems
• Digital signal processing circuits requiring shift storage capabilities
• Expansion modules utilizing serial cascading of flip-flops

Shift Registers Procurement Notes

Verify the specific ordering code matches the required package type, as the N74F299N,602 designation corresponds to the 20-pin plastic DIP (SOT146-1). Confirm that the component status aligns with project lifecycle requirements, noting that older Philips/NXP logic families may have varying availability or obsolescence statuses across different distributors. Ensure compatibility with existing board layouts regarding the DIP-20 footprint.

Shift Registers Selection Notes

Select this component when an 8-bit universal shift register with tri-state outputs is required in a through-hole DIP package. Consider the 74F logic family speed characteristics and power consumption profile relative to system needs. Verify that the input loading and fan-out specifications meet the driving requirements of connected circuitry. Ensure the design accommodates the separate serial I/O pins available on the package.

Shift Registers Part Context

This part belongs to the 74F series of high-speed TTL logic devices originally developed by Philips Semiconductors and now produced by NXP. The 74F299 specifically provides versatile data handling capabilities within a standard 20-pin dual in-line package format. It serves as a foundational building block for digital systems requiring flexible data shifting and storage operations with bus-compatible outputs.

Shift Registers Replacement Considerations

Compatible substitutes include other 74F299 variants from different manufacturers offering identical logical functionality and pinouts. Verify electrical characteristics such as propagation delay and supply current against the original datasheet specifications. Ensure the replacement part supports the same 20-pin DIP package configuration for direct physical interchangeability.

Shift Registers FAQ

How are the parallel data inputs and flip-flop outputs managed?

The parallel load inputs and flip-flop outputs are multiplexed to shared I/O pins to reduce the total number of package pins required.

What happens when both S0 and S1 inputs are HIGH?

When both S0 and S1 are HIGH, the 3-State buffers are disabled in preparation for a parallel load operation, provided the Output Enable inputs are active.

Can the device operate if the outputs are disabled?

Yes, even when the 3-State buffers are disabled by HIGH signals on OE0 or OE1, internal shift, hold, load, and reset operations can still occur.