SN74LS259BNG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage and Control
• Characteristics: 8-bit Addressable Latch with 3-State Outputs
• Package: DIP (Dual In-line Package)
• Essence: The SN74LS259BNG4 is a high-speed, low-power 8-bit addressable latch designed for general-purpose storage applications in digital systems. It provides parallel data storage and control functions necessary for various applications.
• Packaging/Quantity: The SN74LS259BNG4 is available in a 16-pin DIP package and is typically sold in packs of 25 units.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Input Voltage High: 2.0V (min), 7.0V (max)
• Input Voltage Low: -0.5V (min), 0.8V (max)
• Output Voltage High: 2.7V (min), VCC (max)
• Output Voltage Low: 0.5V (max)
• Propagation Delay Time: 15ns (typical)
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

The SN74LS259BNG4 has a total of 16 pins, each serving a specific function:

1. GND: Ground
2. D0: Data Input Bit 0
3. D1: Data Input Bit 1
4. D2: Data Input Bit 2
5. D3: Data Input Bit 3
6. D4: Data Input Bit 4
7. D5: Data Input Bit 5
8. D6: Data Input Bit 6
9. D7: Data Input Bit 7
10. MR: Master Reset (Active Low)
11. G1: Enable Input (Active High)
12. G2A, G2B: Enable Inputs for Output Group A and B (Active High)
13. QA: Output Bit 0
14. QB: Output Bit 1
15. QC: Output Bit 2
16. QD: Output Bit 3

Functional Features

• Addressable latch with 8-bit storage capability
• 3-state outputs for bus-oriented applications
• Individual control of each latch
• Master reset function to clear all latches simultaneously
• High-speed operation suitable for various digital systems
• Low power consumption

Advantages and Disadvantages

Advantages

• Versatile and widely used in digital systems
• Allows parallel data storage and control
• Suitable for bus-oriented applications
• Provides individual control of each latch
• High-speed operation enhances system performance
• Low power consumption helps conserve energy

Disadvantages

• Limited storage capacity (8 bits)
• Requires external components for complete functionality
• Not suitable for applications requiring larger data storage

Working Principles

The SN74LS259BNG4 operates by storing data in its 8-bit addressable latch. The latch can be controlled individually or as a group using the enable inputs. When enabled, the latch stores the input data and provides it at the output pins. The 3-state outputs allow multiple devices to share a common bus without interference. The master reset function clears all latches simultaneously, returning them to their initial state.

Detailed Application Field Plans

The SN74LS259BNG4 finds applications in various digital systems, including:

1. Microprocessor-based systems
2. Data storage and retrieval systems
3. Address decoding circuits
4. Bus-oriented systems
5. Control and interface circuits

Detailed and Complete Alternative Models

1. SN74LS259N: Similar to SN74LS259BNG4 but in a different package (16-pin DIP)
2. 74HC259: CMOS version of the 8-bit addressable latch with similar functionality
3. CD54/74HC259: High-speed CMOS version with improved performance characteristics
4. CD54/74HCT259: CMOS version with TTL-compatible inputs and outputs

These alternative models provide similar functionality and can be used as substitutes for the SN74LS259BNG4 depending on specific requirements.

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