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Product Detailed Parameters
- Description：BUS TRANSCEIVER, ALS SERIES
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Input Type：-
- Output Type：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN74ALS1645A-1DW is an octal bus transceiver from Texas Instruments, belonging to the Advanced Low-power Schottky (ALS) logic family. It features eight bidirectional data channels with three-state outputs, designed for TTL-compatible input and output levels. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports commercial temperature ranges from 0°C to +70°C. Packaged in a 20-pin SOIC format, it facilitates efficient data transfer between buses while minimizing power consumption and propagation delay.
Feature Summary
- Octal bidirectional data transmission capability with three-state outputs
- Advanced Low-power Schottky (ALS) technology for reduced power dissipation
- TTL-compatible input and output voltage levels
- Direction control and output enable functions for bus management
Applications
- Memory and memory mapping applications
- Control lines driving
- Bus-oriented architectures
Procurement Notes
Verify the specific suffix '-1DW' against the manufacturer's current datasheet to confirm package type and electrical characteristics. Ensure compatibility with system voltage requirements and signal integrity needs before integration. Check for end-of-life status or alternative recommendations from Texas Instruments.
Selection Notes
Select this component when high-speed, low-power octal bus interfacing is required. The ALS series offers a balance of speed and power efficiency suitable for complex digital systems. Confirm that the 20-pin SOIC package fits the PCB layout constraints and thermal requirements of the design.
Part Context
This part belongs to the SN74ALS1645A family of bus transceivers. It serves as a critical interface component in digital circuits, enabling data flow control between different bus segments. The ALS variant improves upon standard 74S series performance with lower power consumption while maintaining comparable speeds.
Replacement Considerations
Check for direct pin-to-pin replacements within the same ALS family or compatible 74F/74LS series equivalents if availability is an issue. Verify that any substitute maintains the same voltage levels and drive capabilities.
