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Product Detailed Parameters
- Description：SN54ALS574B OCTAL D-TYPE EDGE-TR
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Function：-
- Type：-
- Output Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Clock Frequency：-
- Max Propagation Delay @ V, Max CL：-
- Trigger Type：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Current - Quiescent (Iq)：-
- Operating Temperature：-
- Mounting Type：-
- Supplier Device Package：-
- Package / Case：-
- Input Capacitance：-
- Grade：-
- Qualification：-
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Overview
The Texas Instruments SN54ALS574B (84001012A) is an octal D-type edge-triggered flip-flop with 3-state outputs, designed for bus driving applications. It operates within a supply voltage range of 2V to 6V and supports data rates up to 90MHz. The device features low power consumption typical of ALS logic, with input/output levels compatible with standard TTL interfaces. It is housed in a 20-pin ceramic flat package suitable for high-reliability environments.
Feature Summary
- Octal D-type edge-triggered flip-flops with 3-state outputs
- Designed specifically for bus driving applications
- Compatible with standard TTL input/output levels
Applications
- Digital signal processing systems requiring data capture on clock edges
- Data storage implementations needing edge-triggered latching
- Bus driving circuits utilizing 3-state output control
Procurement Notes
Verify the specific manufacturer part number prefix SN54ALS574B against the requested 84001012A identifier, as the latter may refer to a distributor-specific or legacy catalog code. Confirm package type compatibility, particularly regarding the 20-pin ceramic flat configuration, to ensure proper mechanical fit. Check for RoHS compliance status if required by your manufacturing standards, noting that older ALS series components may have different environmental certifications compared to modern equivalents.
Selection Notes
Select this component when designing systems requiring octal data latching with tri-state bus isolation. Ensure the application environment supports the operating temperature range specified for military-grade variants. Consider the propagation delay characteristics relative to system clock speeds to maintain timing integrity. Verify that the 3-state outputs align with the bus architecture's impedance requirements and drive capabilities.
Part Context
This component belongs to the Texas Instruments SN54/74ALS series of logic devices, known for advanced low-power Schottky technology. The SN54 variant indicates military-grade reliability and extended temperature ranges, distinguishing it from commercial grade parts. It serves as a fundamental building block for sequential logic circuits in digital systems.
Replacement Considerations
Public confirmed substitute part numbers include SN54ALS574J and SN54ALS574FK. These alternatives offer similar functional specifications and pin configurations. Verify electrical parameters and package dimensions before substitution to ensure compatibility with existing board layouts and system requirements.
