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Product Detailed Parameters
- Description：8 FUNC, POSITIVE EDGE TRIGGERED,
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
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- Number of Elements：-
- Number of Bits per Element：-
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- Max Propagation Delay @ V, Max CL：-
- Trigger Type：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Current - Quiescent (Iq)：-
- Operating Temperature：-
- Mounting Type：-
- Supplier Device Package：-
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Overview
The National Semiconductor 74LS574SC is an octal D-type flip-flop featuring positive edge triggering and three-state outputs. It operates within a supply voltage range of 4.75 V to 5.25 V, with a maximum clock frequency of 30 MHz at 5 V. The device exhibits a typical propagation delay of 59 ns and supports up to 10 LSTTL loads. Packaged in a 20-pin SOIC (SC) format, it functions as a non-inverting storage element for digital logic applications.
Feature Summary
- Octal D-type flip-flop architecture with eight independent storage elements
- Positive edge-triggered data capture synchronized with the clock signal
- Three-state output capability allowing bus-oriented system connections
- Direct interface compatibility with standard LSTTL logic families
Applications
- Parallel-to-serial data conversion circuits
- General-purpose register implementation in digital systems
- Bus buffer applications requiring high-impedance states
- Timing synchronization and data storage modules
Procurement Notes
Verify the manufacturer origin carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific SC suffix corresponds to the required SOIC package variant. Confirm that the component meets the necessary RoHS compliance standards if applicable to your manufacturing process. Cross-reference the datasheet specifications against current inventory to ensure functional equivalence with modern replacements.
Selection Notes
Select this component when designing systems requiring octal storage with three-state control. It is suitable for applications needing direct LSTTL interfacing without additional level shifting. Consider the 59 ns propagation delay for timing constraints. Verify that the operating temperature range aligns with the environmental requirements of the target application.
Part Context
This part belongs to the 74LS series of logic integrated circuits, widely used in legacy digital designs. The 74LS574 provides a cost-effective solution for storing eight bits of data. Its pinout is compatible with other 74LS devices, facilitating easy integration into existing circuit boards designed around the LS logic family standards.
Replacement Considerations
Consider the SN74LS574 from Texas Instruments as a direct equivalent. Other manufacturers such as ON Semiconductor or NXP may offer compatible parts like the MC74LS574. Verify pin compatibility and electrical specifications before substitution.
