SN74HC245APW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC245APW is an octal bus transceiver from the Texas Instruments SN74HC245 series, designed for asynchronous bidirectional data communication between two buses. It features eight non-inverting channels with three-state outputs, allowing direct connection to bus lines or up to fifteen LSTTL loads. The device operates within a supply voltage range of 2 V to 6 V and supports CMOS input and output levels. Key electrical parameters include a maximum propagation delay of 22 ns at 5 V, low input current of 1 µA, and output drive currents of ±6 mA. It functions in temperatures from -40°C to +85°C and is housed in a TSSOP-20 package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides octal (8-bit) bidirectional data transmission capability between separate bus systems.
• Features three-state outputs that effectively isolate the bus when the device is disabled.
• Supports wide supply voltage operation ranging from 2 V to 6 V for flexible system integration.
• Accepts CMOS logic inputs while driving standard CMOS or LSTTL loads directly.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous bidirectional data communication between microprocessors and memory modules.
• Driving bus lines in computer systems and industrial control networks.
• Interface circuits requiring isolation between different voltage domains within the specified range.
• General-purpose digital signal routing in embedded systems.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'PW' confirms the TSSOP-20 surface-mount package variant. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the operating temperature range meets the environmental requirements of the target application. Cross-reference the datasheet revision date to ensure all electrical characteristics are current.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal width is required for bidirectional data transfer. The HC series offers a balance of speed and power consumption suitable for general-purpose applications. Verify that the 2 V to 6 V supply range aligns with the system's power architecture. Consider the TSSOP-20 package constraints regarding PCB space and thermal dissipation capabilities.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74HC245 family of octal bus transceivers. It shares functional compatibility with other variants in the series but differs in packaging and specific electrical tolerances. The HC logic family is characterized by high noise immunity and low power dissipation compared to older TTL technologies. It serves as a standard interface solution for parallel data buses in legacy and modern digital designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC245PWR: Same logical function and pinout but utilizes a TSSOP-20 tape-and-reel package instead of tube packaging. SN74HCT245APW: Compatible logic function but requires a 4.5 V to 5.5 V supply voltage range due to HCT input thresholds. SN74LVC245APW: Lower voltage operation (1.65 V to 3.6 V) with higher drive current; verify voltage level compatibility before substitution.