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Product Detailed Parameters
- Description：LATCH TRANSPARENT 3-ST 8-CH D-TY
- Series：74HCT
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：D-Type Transparent Latch
- Circuit：1:08
- Output Type：Tri-State
- Voltage - Supply：4.5V ~ 5.5V
- Independent Circuits：1
- Delay Time - Propagation：25ns
- Current - Output High, Low：6mA, 6mA
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.209", 5.30mm Width)
- Supplier Device Package：20-SO
- Grade：-
- Qualification：-
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Overview
The SN74HCT373ANS is an octal transparent D-type latch featuring three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V. The device integrates eight independent latches sharing common latch enable (LE) and output enable (OE) inputs. It provides high-current tri-state true outputs capable of driving up to 15 LSTTL loads. Typical propagation delay is 21ns, with maximum ICC at 80μA. The component is housed in a 20-SOIC package.
Feature Summary
- Octal transparent D-type latch architecture with shared control inputs
- High-current tri-state outputs for direct interface with bus systems
- Low power consumption design suitable for battery-operated applications
- Compatible with standard TTL logic levels
Applications
- Bus-oriented memory mapping
- Register files in digital systems
- Temporary data storage in microprocessor interfaces
- I/O port expansion circuits
Procurement Notes
Verify the suffix 'ANS' confirms the 20-SOIC surface-mount package and commercial temperature grade. Ensure the ordering part number matches the specific tape-and-reel or tube quantity requirements for your assembly line. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference with the official TI datasheet to validate pinout compatibility before integration.
Selection Notes
Select this component when an octal latch with three-state capability is required for bus isolation. The HCT technology ensures compatibility with 5V CMOS devices while accepting TTL-compatible input levels. Consider the 20-SOIC package for surface-mount assembly constraints. Evaluate the 4.5V to 5.5V operating range against your system's power supply stability.
Part Context
This part belongs to the SNx4HCT373 family of octal transparent D-type latches. It shares functional characteristics with variants like SN74HCT373AN and SN74HCT373DWR, differing primarily in packaging and mounting type. The family is designed for general-purpose digital logic applications requiring data retention and bus driving capabilities.
Replacement Considerations
SN74HCT373AN is listed as an equivalent alternative. Verify package differences between SOIC and PDIP formats. Check for any updates in the latest TI documentation regarding recommended replacements for new designs.
