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Product Detailed Parameters
- Description：IC MULTIVIBRATOR
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Independent Circuits：-
- Schmitt Trigger Input：-
- Propagation Delay：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN74LS422D is a dual retriggerable monostable multivibrator manufactured by Texas Instruments. It utilizes Low-power Schottky (LS) TTL technology and is housed in a 14-pin Small Outline Package (SOP). The device operates within a commercial temperature range of 0°C to 70°C with a standard 5V supply voltage. Key electrical specifications include a maximum propagation delay of 38 ns, a low-level output current of 8 mA, and a high-level output current of -400 µA.
Feature Summary
- Dual independent retriggerable monostable multivibrator circuits integrated into a single package
- Low-power Schottky TTL logic family for reduced power consumption and high speed
- Capable of generating precise pulse widths determined by external timing components
Applications
- Pulse generation and shaping in digital systems
- Timing delays and time-base circuits
- Debouncing switches or contacts
Procurement Notes
Verify the specific suffix 'D' confirms the SOP-14 surface-mount package configuration. Confirm RoHS compliance status as legacy LS series data may vary by manufacturing date. Ensure the supplier provides official datasheets matching the SN74LS422 specification sheet to validate pinout and electrical characteristics against the original Texas Instruments documentation.
Selection Notes
Select this component when dual retriggerable monostable functionality is required in a compact surface-mount form factor. The LS TTL series offers a balance of speed and power dissipation suitable for general-purpose digital logic applications. Consider the 14-pin SOP footprint constraints during PCB layout design compared to through-hole alternatives.
Part Context
This part belongs to the Texas Instruments SN74LSxx series of Low-power Schottky TTL logic devices. The SN74LS422 specifically functions as a monostable multivibrator, distinct from decoder or counter variants within the broader 74-series ecosystem. It serves as a foundational timing element in discrete logic designs.
Replacement Considerations
Direct functional equivalents include the SN54LS422 for military temperature ranges. Other compatible dual retriggerable monostables include the SN74122 or SN74LS122, though pinouts and internal circuitry may differ requiring schematic review.
