SN74ALS245ANSRG4

Overview

The SN74ALS245ANSRG4 is an octal bus transceiver manufactured by Texas Instruments, belonging to the SN74ALS logic series. It features eight non-inverting channels with three-state outputs housed in a 20-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports input levels compatible with TTL or CMOS standards. It provides a low-level output current of 24 mA and a high-level output current of -15 mA. The component functions reliably across an operating temperature range from 0°C to +70°C.

Feature Summary

• Octal bus transceiver architecture providing eight independent data channels for parallel communication.
• Three-state outputs enable direct connection to system buses without additional buffering requirements.
• Non-inverting logic design ensures signal polarity preservation during transmission.
• High drive capability allows interfacing with heavy capacitive loads on data lines.

Applications

• Parallel data transmission between microprocessors and memory modules.
• I/O port expansion in embedded control systems.
• Bus-oriented driving for consumer electronics and industrial instrumentation.
• Clock drivers and buffer circuits requiring high current capacity.

Procurement Notes

Verify the complete part number including the G4 suffix to confirm RoHS compliance status. Ensure the SOIC-20 package dimensions match the target PCB footprint. Confirm that the 4.5V to 5.5V supply voltage aligns with the system power rails. Check the operating temperature range against environmental specifications. Validate pinout compatibility if replacing legacy components.

Selection Notes

Select this component when designing systems requiring robust parallel data transfer with high drive strength. The ALS series offers faster switching speeds compared to standard LS logic while maintaining lower power consumption than AS variants. Consider the 24 mA output current capability for driving long traces or multiple inputs. Ensure the 5V supply domain matches the connected peripheral devices for proper logic level compatibility.

Part Context

This device is part of the Texas Instruments SN74ALS family, representing Advanced Low-Power Schottky technology. It serves as a successor to earlier 74S245 designs, offering improved speed and power efficiency. The SN74ALS245ANSR variant shares functional equivalence with other octal bus transceivers but distinguishes itself through specific drive characteristics and thermal performance suitable for commercial applications.

Replacement Considerations

SN74ALS245ANSRE4