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Product Detailed Parameters
- Description：IC D-TYPE TRANSP SGL 8:8 20SOIC
- Series：74ALS
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Logic Type：D-Type Transparent Latch
- Circuit：8:08
- Output Type：Tri-State
- Voltage - Supply：4.5V ~ 5.5V
- Independent Circuits：1
- Delay Time - Propagation：2ns
- Current - Output High, Low：2.6mA, 24mA
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Grade：-
- Qualification：-
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Overview
The SN74ALS573CDWR is an octal D-type transparent latch manufactured by Texas Instruments, belonging to the ALS logic series. It features eight non-inverting outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device exhibits a propagation delay of 14 ns, with a low-level output current capability of 32 mA and a high-level output current of -2.6 mA. It functions reliably across an operating temperature range from 0°C to +70°C and is housed in a 20-pin SSOP package.
Feature Summary
- Provides eight-bit data storage via transparent latch functionality for bus holding applications
- Delivers high drive strength through 32 mA low-level output current capability
- Ensures signal integrity with 14 ns propagation delay characteristics
Applications
- Bus-oriented memory mapping
- Register files
- I/O buffering
Procurement Notes
Verify the specific suffix 'CDWR' against the manufacturer's official datasheet to confirm the SSOP-20 package type and industrial/commercial temperature grade. Ensure compatibility with existing PCB footprints for 20-pin small-outline packages. Confirm RoHS compliance status as indicated in the latest component documentation before finalizing procurement specifications.
Selection Notes
Select this component when designing systems requiring octal latching with ALS speed and drive characteristics. It serves as a direct functional replacement for standard 74LS573 designs where higher speed or lower power consumption is not the primary constraint compared to AC/ACT families. Verify that the 5V supply rail matches the system requirements.
Part Context
This part belongs to the Texas Instruments SN74ALS573 family of octal transparent latches. It is designed for high-speed digital applications requiring multiple data storage elements in a single package. The ALS series offers a balance between power consumption and speed, making it suitable for legacy and mixed-technology digital systems.
Replacement Considerations
Check for SN74ALS573N (PDIP) or SN74ALS573D (SOIC) if package changes are acceptable. Verify pinout compatibility with SN74HC573 variants, noting differences in drive current and switching speeds.
