74FCT574ATQG

Overview

The IDT 74FCT574ATQG is an octal edge-triggered D-type flip-flop featuring three-state outputs, manufactured by Integrated Device Technology. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 10 MHz. The device exhibits a typical propagation delay of 7.2 ns and provides high drive capabilities with a low-level output current of 48 mA and a high-level output current of -15 mA. Designed for industrial applications, it functions reliably across a temperature range of -40°C to +85°C and is housed in a 20-pin QSOP package.

Feature Summary

• Octal edge-triggered D-type flip-flop architecture with three-state outputs
• High-drive capability suitable for bus driver and memory address latch implementations
• Compatible with standard CMOS and TTL logic families

Applications

• Memory address latching systems
• I/O port buffering interfaces
• Bus driver circuits requiring high capacitive load drive

Procurement Notes

Verify component authenticity through authorized Renesas or IDT distributors due to potential legacy status. Confirm RoHS compliance details via the official datasheet before integration. Ensure the specific QSOP-20 package variant matches the target PCB footprint requirements. Validate that the operating temperature range meets the environmental specifications of the final assembly.

Selection Notes

Select this component when an octal register with three-state control is required for high-speed data storage. The FCT series offers superior speed compared to standard 74LS logic while maintaining CMOS power efficiency. Consider the 7.2 ns propagation delay and 10 MHz limit for timing-critical designs. Verify that the 48 mA sink current adequately drives the connected loads without exceeding thermal limits.

Part Context

This part belongs to the 74FCT family of Fast CMOS logic devices produced by Integrated Device Technology, now under Renesas Electronics. The 74FCT574 serves as a direct replacement for older 74S574 or 74LS374 equivalents in terms of pinout and function, but delivers significantly faster switching speeds. It is designed to bridge the performance gap between standard TTL and advanced CMOS technologies.

Replacement Considerations

Public confirmed substitute part numbers include IDT74FCT574ATQG and 74FCT574ATQG.