DM74LS377N

Product Overview

• Category: Integrated Circuit
• Use: Flip-Flop
• Characteristics: TTL Logic, Octal D-Type Transparent Latch
• Package: 20-Pin Plastic Dual In-Line Package (PDIP)
• Essence: The DM74LS377N is a high-speed octal D-type transparent latch designed for general-purpose storage applications in digital systems.
• Packaging/Quantity: Available in tubes or reels, with quantities varying based on manufacturer and distributor.

Specifications

• Logic Family: LS-TTL
• Number of Bits: 8
• Input Voltage: 0.8V to 2.0V
• Output Voltage: 0V to 5.25V
• Propagation Delay: 15ns (typical)
• Operating Temperature: -55°C to +125°C

Pin Configuration

The DM74LS377N has a total of 20 pins, which are assigned specific functions as follows:

1. D0: Data Input 0
2. D1: Data Input 1
3. D2: Data Input 2
4. D3: Data Input 3
5. D4: Data Input 4
6. D5: Data Input 5
7. D6: Data Input 6
8. D7: Data Input 7
9. GND: Ground
10. Q0: Output 0
11. Q1: Output 1
12. Q2: Output 2
13. Q3: Output 3
14. Q4: Output 4
15. Q5: Output 5
16. Q6: Output 6
17. Q7: Output 7
18. LE: Latch Enable
19. CP: Clock Pulse
20. VCC: Power Supply

Functional Features

• Octal D-Type Transparent Latch with 3-State Outputs
• High-Speed Operation
• Direct Interface with TTL Logic Levels
• Buffered Inputs and Outputs
• Latch Enable (LE) for Data Storage
• Clock Pulse (CP) for Latching Data
• 3-State Outputs for Bus-Oriented Applications

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data storage and retrieval.
• Direct interface with TTL logic levels simplifies integration into existing digital systems.
• Buffered inputs and outputs provide improved signal integrity.
• 3-state outputs enable bus-oriented applications, allowing multiple devices to share a common data bus.

Disadvantages

• Limited voltage range for input and output signals (0.8V to 2.0V and 0V to 5.25V, respectively).
• Propagation delay of 15ns may be a limiting factor in certain high-speed applications.
• The 20-pin package may require additional space on the circuit board compared to smaller package options.

Working Principles

The DM74LS377N operates as an octal D-type transparent latch. It stores data from the input pins (D0-D7) when the latch enable (LE) signal is active. The stored data can then be latched onto the output pins (Q0-Q7) when a clock pulse (CP) is applied. The 3-state outputs allow the device to be connected to a common data bus, enabling multiple devices to share the same data lines.

Detailed Application Field Plans

The DM74LS377N can be used in various applications, including:

1. Register File Systems
2. Data Storage Units
3. Address Decoders
4. Multiplexers
5. Arithmetic Logic Units (ALUs)
6. Control Units

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the DM74LS377N are:

1. SN74LS377
2. 74HC377
3. CD74HCT377
4. MC74ACT377

These models offer similar functionality and characteristics, but may vary in terms of voltage levels, speed, and package options.

Note: The content provided above is a general overview and should be verified with the specific datasheet and manufacturer's documentation for accurate and up-to-date information.