MM74HC259SJX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data storage and retrieval
• Characteristics: High-speed, 8-bit addressable latch with 3-state outputs
• Package: Plastic surface mount package (SOIC)
• Essence: The MM74HC259SJX is a versatile IC that can store and retrieve data using an 8-bit addressable latch. It is commonly used in digital systems for applications such as memory expansion, data multiplexing, and parallel-to-serial conversion.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature: -40°C to +85°C
• Input Compatibility: CMOS/TTL
• Output Drive Capability: 10 LSTTL Loads
• Latch Enable Setup Time: 20 ns
• Data Input Setup Time: 20 ns
• Data Output Hold Time: 5 ns

Pin Configuration

The MM74HC259SJX has a total of 16 pins arranged as follows:

+-----+ QA1 |1 16| VCC QA2 |2 15| QA0 QA3 |3 14| LE QA4 |4 13| D7 QA5 |5 12| D6 QA6 |6 11| D5 QA7 |7 10| D4 GND |8 9| D3 +-----+

Functional Features

• 8-bit addressable latch with 3-state outputs
• Individual latch enable control for each latch
• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatible with both CMOS and TTL logic levels

Advantages and Disadvantages

Advantages: - Versatile and widely used in digital systems - High-speed operation allows for efficient data storage and retrieval - Low power consumption helps in reducing overall system energy requirements - Wide operating voltage range provides flexibility in different applications - Compatibility with both CMOS and TTL logic levels simplifies integration into existing systems

Disadvantages: - Limited to 8-bit addressable latch functionality - May require additional components for certain applications - Sensitive to electrostatic discharge (ESD) and proper handling precautions are necessary during installation

Working Principles

The MM74HC259SJX operates by latching the input data onto its internal registers based on the state of the latch enable (LE) control signal. When LE is high, the data inputs (D0-D7) are stored in the corresponding latch outputs (QA0-QA7). The stored data can then be accessed through the 3-state outputs when the output enable (OE) signal is active.

Detailed Application Field Plans

The MM74HC259SJX finds extensive use in various digital systems and applications, including but not limited to: - Memory expansion in microcontrollers and microprocessors - Data multiplexing and demultiplexing - Parallel-to-serial conversion - Address decoding in memory systems - Control signal generation in complex digital circuits

Alternative Models

Here are some alternative models that offer similar functionality to the MM74HC259SJX: - SN74HC259N by Texas Instruments - CD74HC259E by Texas Instruments - 74HCT259 by NXP Semiconductors - MC74HC259AN by ON Semiconductor

These alternatives can be considered based on specific requirements, availability, and compatibility with the existing system.

In conclusion, the MM74HC259SJX is a versatile and widely used IC that provides efficient data storage and retrieval capabilities. Its high-speed operation, low power consumption, and compatibility with different logic levels make it suitable for various digital applications. However, it has limitations in terms of addressable latch size and requires careful handling during installation due to its sensitivity to ESD.