74LVCH244AT20-13

Overview

The 74LVCH244AT20-13 is an octal buffer and line driver manufactured by Diodes Incorporated. It operates within a supply voltage range of 1.65V to 3.6V. The device features two independent 4-bit buffers with separate output-enable inputs. It provides high drive capability, sourcing or sinking 24mA at VCC = 3V. Inputs are tolerant to 5.5V, supporting mixed-voltage environments. The component includes bus hold circuitry and I_OFF support for partial power-down applications.

Feature Summary

• Provides two independent 4-bit non-inverting buffers with separate output-enable controls
• Features Schmitt trigger action at all inputs for improved noise immunity
• Includes integrated bus hold circuitry to maintain logic states on un-driven inputs
• Supports partial power-down operation via I_OFF circuitry to prevent backflow current

Applications

• Bus driving in general-purpose logic systems
• Power down signal isolation
• Memory drivers and address drivers
• System clock drivers

Procurement Notes

Verify the package code T20 corresponds to the TSSOP-20 form factor. Confirm the -13 suffix indicates 13-inch tape and reel packaging. Ensure the specific revision DS35889 Rev. 1-2 matches design requirements. Check RoHS compliance status as defined by manufacturer documentation.

Selection Notes

Select this component when mixed-voltage interfacing between 1.65V and 5.5V domains is required. The 5.5V input tolerance allows direct connection to higher voltage buses without level shifting. The low power consumption makes it suitable for battery-operated devices. Verify thermal resistance values if operating near maximum temperature limits.

Part Context

This part belongs to the 74LVCH244A series of octal buffers. It is designed for CMOS low-power applications requiring high-speed data transmission. The device is fully lead-free and compliant with EU Directives 2002/95/EC and 2011/65/EU regarding hazardous substances.

Replacement Considerations

Cross-reference with other 74LVCH244 variants from different manufacturers. Ensure pinout compatibility and electrical characteristics match. Verify that replacement parts also support 5.5V input tolerance and I_OFF functionality.

FAQ

How does the bus hold feature function?

The bus hold circuitry holds unused or un-driven inputs at a high or low logic state, eliminating the need for external pull-up or pull-down resistors.

What is the purpose of the I_OFF circuitry?

The I_OFF circuitry disables the outputs when the device is powered down, preventing damaging current backflow into the system.