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MC74ACT540MELG
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Product Detailed Parameters
- Description：IC BUFF INVERT 5.5V SOEIAJ-20
- Series：74ACT
- Mfr：onsemi
- Package：Tape & Reel (TR)
- Logic Type：Buffer, Inverting
- Number of Elements：1
- Number of Bits per Element：8
- Input Type：-
- Output Type：3-State
- Current - Output High, Low：24mA, 24mA
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.209", 5.30mm Width)
- Supplier Device Package：SOEIAJ-20
- Grade：-
- Qualification：-
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Overview
The MC74ACT540MELG is an octal buffer and line driver manufactured by onsemi, belonging to the 74ACT logic family. It features eight inverting outputs with three-state capability, allowing for high-impedance isolation when disabled. The device operates within a supply voltage range of 4.5V to 5.5V and utilizes a 20-pin SSOP surface-mount package. Designed for memory and address driving applications, it provides TTL-compatible inputs and robust output drive currents suitable for bus-oriented architectures.
Feature Summary
- Octal inverting buffer architecture with three-state outputs
- TTL-compatible input levels for system interoperability
- High-output drive current capability for bus loading
- Surface-mount SSOP packaging for compact board layouts
Applications
- Memory address drivers
- Clock signal distribution
- Bus-oriented transceiver interfaces
Procurement Notes
Verify the specific suffix MELG against the official datasheet to confirm the package type and tape-and-reel or tube configuration. Ensure the order quantity matches the manufacturer's standard packing unit. Confirm RoHS compliance status and lead times directly with authorized distributors prior to finalizing procurement plans.
Selection Notes
Select this component when designing systems requiring eight-channel inverting buffering with three-state control. It is appropriate for applications needing TTL-compatible inputs and operation at 5V logic levels. Consider the SSOP package constraints regarding thermal dissipation and pin pitch during PCB layout planning.
Part Context
This part belongs to the 74ACT series of high-speed CMOS logic devices. It shares functional similarities with other octal buffers like the 74AC540 but offers improved switching speeds and lower power consumption compared to older 74LS variants. The ACT series is widely used in microprocessor-based systems for data and address bus management.
Replacement Considerations
Compatible substitutes include the MC74AC540 for non-TTL input versions and the MC74ACT541 for non-inverting functionality. Cross-reference package variations such as SOIC or TSSOP if pin compatibility allows.
