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Product Detailed Parameters
- Description：IC FF D-TYPE DUAL 4BIT 24SOP
- Series：74AS
- Mfr：Fairchild Semiconductor
- Package：Tube
- Function：Master Reset
- Type：D-Type
- Output Type：Tri-State, Non-Inverted
- Number of Elements：2
- Number of Bits per Element：4
- Clock Frequency：80 MHz
- Max Propagation Delay @ V, Max CL：10.5ns @ 5V, 50pF
- Trigger Type：Positive Edge
- Current - Output High, Low：15mA, 48mA
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Iq)：133 mA
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：24-SOP
- Package / Case：24-SOIC (0.295", 7.50mm Width)
- Input Capacitance：-
- Grade：-
- Qualification：-
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Overview
The DM74AS874WM is an octal D-type flip-flop with 3-state outputs manufactured by Fairchild Semiconductor. It utilizes the Advanced Low-Power Schottky (ALS) TTL process for high-speed operation and low power consumption. The device features a common clock input and separate output enable controls for each direction, allowing data to be transferred from inputs to outputs or from internal registers to buses. It is housed in a 24-pin SOIC package.
Feature Summary
- Octal D-type flip-flop configuration with 3-state outputs
- Advanced Low-Power Schottky (ALS) technology implementation
- Independent output enable control for bidirectional bus access
Applications
- High-speed register applications
- Bidirectional data bus buffering
- Memory interface circuits
Procurement Notes
Verify component authenticity through official manufacturer channels or authorized distributors. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Check for obsolescence notices as ALS series components may have limited production availability. Ensure storage conditions meet specified humidity requirements.
Selection Notes
Select this component for designs requiring octal latching with tri-state capability in ALS logic families. Consider pin compatibility with existing 24-pin SOIC footprints. Evaluate switching speed requirements against ALS specifications. Verify voltage levels match standard 5V TTL systems.
Part Context
This part belongs to the Fairchild DM74AS series of Advanced Schottky TTL logic devices. It complements other ALS transceivers like the DM74ALS245A by providing registered data storage capabilities. The WM suffix indicates a surface-mount SOIC package variant within the broader DM74AS product line.
FAQ
Does the DM74AS874WM have independent output enables?
Yes, the device provides separate output enable controls for each direction to manage bus isolation.
What logic family does this component belong to?
It is part of the Advanced Low-Power Schottky (ALS) TTL logic family.
