MC74AC240DTR2

Overview

The MC74AC240DTR2G is an octal buffer and line driver from the onsemi AC logic family, housed in a 20-TSSOP package. It features eight inputs and outputs with three-state capability and inverting polarity. The device operates within a supply voltage range of 2 V to 6 V. Key electrical parameters include a high-level output current of -24 mA and a low-level output current of 24 mA. Static current is specified at 8 uA, while operating power consumption reaches 80 uA. Propagation delay is 8 ns at 3.3 V and 6.5 ns at 5 V. The component supports surface mount installation and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Provides octal buffering with three-state output control for bus-oriented communication systems.
• Features symmetrical drive capability with 24 mA source and sink currents for transmission line driving.
• Operates with low static power dissipation suitable for battery-powered applications.

Applications

• Clock drivers and buffer circuits
• Memory address and data bus drivers
• Carry propagation in high-speed computing devices

Procurement Notes

Verify the complete part number includes the trailing 'G' suffix (MC74AC240DTR2G) as indicated in official documentation, which denotes RoHS compliance. Confirm the TSSOP-20 package type matches the design requirements. Ensure the supplier provides valid datasheets referencing the specific AC logic series characteristics. Cross-reference ordering information with authorized distributors to ensure authenticity and correct revision levels.

Selection Notes

Select this component when designing systems requiring octal buffering with three-state outputs within a 2V to 6V supply range. The AC logic family offers a balance between speed and power consumption compared to older standards. Consider the 20-TSSOP package for space-constrained surface-mount designs. Verify that the 24 mA drive current meets the load requirements of the connected circuitry without exceeding thermal limits.

Part Context

This component belongs to the MC74AC240 series of octal buffers and line drivers manufactured by onsemi. It is part of the broader 74AC logic family, designed for high-speed digital applications. The device serves as a standard interface solution for connecting microprocessors, memory, and other digital logic components in complex electronic systems.

Replacement Considerations

The MC74AC240DWG is a documented alternative in the same series, utilizing a SOIC-20 package instead of TSSOP. Both parts share identical logical functionality and electrical specifications but differ in physical footprint and mounting style.