SN74ALS1245ANSR

Overview

The SN74ALS1245ANSR is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin SOIC surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. The device features three-state outputs with a low-level output current of 16 mA and a high-level output current of -15 mA. It exhibits a propagation delay of 13 ns and functions as a non-inverting transceiver across eight channels. The component is rated for operation between 0°C and +70°C.

Feature Summary

• Octal bidirectional data transfer capability with independent direction control
• Three-state outputs allowing direct connection to system buses
• TTL-compatible input and output voltage levels

Applications

• Memory mapping
• Clock drivers
• Bus-oriented communications

Procurement Notes

Verify the specific suffix 'ANSR' corresponds to the 20-SOIC package and tape-and-reel orientation. Confirm RoHS compliance status and lead-free manufacturing details against the latest manufacturer datasheet revision. Ensure the ordering part number matches the required pin configuration and electrical specifications for the target application design.

Selection Notes

Select this component when an octal transceiver with ALS speed and standard TTL compatibility is required. It serves as a surface-mount alternative to through-hole DIP variants like the SN74ALS1245AN. Consider the 13 ns propagation delay and drive strength for signal integrity requirements in digital bus systems operating at 5 V.

Part Context

This part belongs to the SN74ALS1245A series of octal bus transceivers. It shares functional similarities with the SN74ALS245ANSR but may differ in specific control pin configurations or internal circuitry optimizations defined by the manufacturer's documentation for the 1245A variant within the ALS logic family.

Replacement Considerations

SN74ALS245ANSR: Octal bus transceiver in 20-SOIC package.