Key facts
- Model
- DM7425
- Documents
- 4
- Languages
- EN
- Last added
- 2012-06-12
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National Semiconductor DM54259/DM74259 8-Bit Addressable Latches Datasheet
This document describes the DM54259 and DM74259, which are 8-bit addressable latches designed for general-purpose storage applications in digital systems. These multifunctional devices can operate as storage registers, serial-holding registers, active-high decoders, or demultiplexers. They feature asynchronous parallel clear and an enable/disable input to simplify expansion.
Read onlineNational Semiconductor DM7425 specifications
| Storage Capacity | 8-bit |
|---|---|
| Operating Temperature (Commercial) | 0°C to +70°C |
| Supply Voltage (Min) | 4.5V |
| Low Level Output Current | 16 mA |
| High Level Output Current | -0.8 mA |
| Typical Propagation Delay (Enable-to-output) | 18 ns |
| Typical Propagation Delay (Data-to-output) | 21 ns |
| Typical Propagation Delay (Address-to-output) | 22 ns |
| Typical Propagation Delay (Clear-to-output) | 21 ns |
Source: National Semiconductor DM54259/DM74259 8-Bit Addressable Latches Datasheet
All National Semiconductor DM7425 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- National Semiconductor DM54259/DM74259 8-Bit Addressable Latches Datasheet 3 p
- National Semiconductor DM54253/DM74253 Tri-State Dual 1 of 4 Line Data Selectors/Multiplexers Datasheet 4 p
- National Semiconductor DM54251/DM74251 Tri-State Data Selectors/Multiplexers Datasheet 4 p
- National Semiconductor 5425/DM7425 Dual 4-Input NOR Gate Datasheet 2 p
Questions answered in these manuals
What are the four distinct modes of operation?
The four modes are addressable-latch mode, memory mode, 1-of-8 decoding or demultiplexing mode, and clear mode.
From: National Semiconductor DM54259/DM74259 8-Bit Addressable Latches Datasheet
Is this device a direct replacement for Fairchild 9334?
Yes, the DM54259/DM74259 is listed as a direct replacement for Fairchild 9334.
From: National Semiconductor DM54259/DM74259 8-Bit Addressable Latches Datasheet
What is the typical propagation delay of the DM54253?
The typical propagation delay is 13.5 ns.
What happens to the output when the enable line is high?
The output enters a high-impedance TRI-STATE condition.
What is the function of the strobe input?
The strobe must be at a low logic level to enable these devices; when high, outputs are in a high-impedance state.
From: National Semiconductor DM54251/DM74251 Tri-State Data Selectors/Multiplexers Datasheet
What is the maximum supply voltage?
The maximum supply voltage is 5.5V.
From: National Semiconductor DM54251/DM74251 Tri-State Data Selectors/Multiplexers Datasheet