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Product Detailed Parameters
- Description：IC TXRX NON-INVERT 5.5V 20DIP
- Series：74ALS
- Mfr：Texas Instruments
- Package：Tube
- Logic Type：Transceiver, Non-Inverting
- Number of Elements：1
- Number of Bits per Element：8
- Input Type：-
- Output Type：3-State
- Current - Output High, Low：15mA, 24mA
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Through Hole
- Package / Case：20-DIP (0.300", 7.62mm)
- Supplier Device Package：20-PDIP
- Grade：-
- Qualification：-
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Overview
The SN74ALS245AN is an octal bus transceiver manufactured by Texas Instruments, belonging to the 74ALS logic series. It features a single circuit with eight bits per element and non-inverting polarity. The device utilizes a 20-PDIP package for through-hole mounting. Electrical specifications include a supply voltage range of 4.5 V to 5.5 V. Output drive capabilities are defined by a high-level output current of -15 mA and a low-level output current of 24 mA. The component operates within a temperature range of 0°C to +70°C.
Feature Summary
- Octal bus transceiver architecture supporting bidirectional data transfer
- Non-inverting signal polarity with three-state outputs
- High-current driving capability suitable for bus-oriented applications
Applications
- Bus-oriented memory and register systems
- Data acquisition and control systems
- Digital signal processing units
Procurement Notes
Verify the specific manufacturer designation on the component marking, as the prefix indicates Texas Instruments production. Confirm the package type matches the required 20-pin dual in-line configuration for your PCB layout. Ensure the operating environment remains within the specified commercial temperature limits. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.
Selection Notes
Select this component when an octal wide-bus interface is required with moderate speed and high drive strength. The ALS series offers a balance between power consumption and switching speed compared to standard TTL. Verify that the system voltage aligns with the 4.5 V to 5.5 V operating range. Consider the through-hole packaging constraint if surface-mount alternatives are not feasible for the assembly process.
Part Context
This part belongs to the SN74ALS family, which represents Advanced Low-power Schottky logic technology. The 74ALS245A variant specifically provides octal buffering and bus driving functions. It serves as a standard interface component for connecting microprocessors to peripheral devices or memory banks in digital circuits requiring reliable data transmission.
