SN74LVC4245APWRE4

Translators, Level Shifters Overview

The SN74LVC4245APWRE4 is an octal bus transceiver and 3.3-V to 5-V shifter with three-state outputs manufactured by Texas Instruments. It belongs to the SN74LVC4245A series and utilizes a 24-pin TSSOP package. The device supports bidirectional data transfer between two buses operating at different voltage levels, specifically allowing VCCA to range from 4.5 V to 5.5 V while VCCB ranges from 2.7 V to 3.6 V. Key electrical parameters include a maximum propagation delay of 6.7 ns, a maximum supply current of 80 uA, and output drive capabilities of -24 mA for high-level and 24 mA for low-level states. It operates within a temperature range of -40°C to +85°C.

Translators, Level Shifters Feature Summary

• Provides bidirectional voltage translation between 3.3-V and 5-V buses without requiring board layout changes.
• Features three-state outputs that effectively isolate buses when the device is disabled via the output enable input.
• Control circuitry references VCCA, ensuring direction control inputs align with the A-side voltage logic levels.

Translators, Level Shifters Applications

• Asynchronous communication between data buses operating at different voltage domains.
• Post-migration interface solutions allowing upgrades from 5-V to 3.3-V systems without PCB redesign.
• General-purpose bidirectional level shifting in mixed-voltage digital circuits.

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'E4' indicates lead-free packaging compliant with RoHS standards as per Texas Instruments documentation. Confirm the package type is TSSOP-24 and ensure the voltage domain requirements match the application's VCCA and VCCB specifications. Cross-reference the manufacturer part number with official TI distributors to ensure authenticity and correct revision status before procurement.

Translators, Level Shifters Selection Notes

Select this component when interfacing 5-V logic devices with 3.3-V logic devices in an octal configuration. It is suitable for designs requiring non-inverting data transmission with controlled directionality. Ensure the system power supplies can maintain the required voltage ranges for both ports. Consider the 6.7 ns propagation delay if signal integrity at higher frequencies is critical.

Translators, Level Shifters Part Context

This device is part of the SN74LVC4245A family of octal bus transceivers designed for low-voltage CMOS applications. The 'E4' suffix typically denotes environmental compliance, specifically lead-free construction. It shares functional compatibility with standard LVC series logic but offers specific voltage translation capabilities between 3.3-V and 5-V domains, making it distinct from standard non-translating bus transceivers.

Translators, Level Shifters Replacement Considerations

SN74LVC4245APWR

Translators, Level Shifters FAQ

What is the primary function of the DIR input?

The DIR input determines the direction of data flow. When high, data transfers from port A to port B; when low, data transfers from port B to port A.

How does the device handle voltage differences between ports?

It allows independent power supplies for each port (VCCA and VCCB), enabling seamless translation between 3.3-V and 5-V logic levels without external components.