SN74ALS1645ADWG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Shift Register
• Characteristics: High-speed, TTL compatible, 16-bit parallel-in/serial-out shift register
• Package: SOIC (Small Outline Integrated Circuit) package
• Essence: Serial-to-parallel data conversion
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Input Voltage Levels: TTL compatible
• Maximum Clock Frequency: 100 MHz
• Number of Bits: 16
• Output Type: Tri-State

Detailed Pin Configuration

The SN74ALS1645ADWG4 has a total of 20 pins. The pin configuration is as follows:

1. SER (Serial Data Input)
2. CLK (Clock Input)
3. GND (Ground)
4. QA (Parallel Output A)
5. QB (Parallel Output B)
6. QC (Parallel Output C)
7. QD (Parallel Output D)
8. QE (Parallel Output E)
9. QF (Parallel Output F)
10. QG (Parallel Output G)
11. QH (Parallel Output H)
12. QI (Parallel Output I)
13. QJ (Parallel Output J)
14. QK (Parallel Output K)
15. QL (Parallel Output L)
16. QM (Parallel Output M)
17. QN (Parallel Output N)
18. VCC (Supply Voltage)
19. OE (Output Enable)
20. RST (Reset)

Functional Features

• Serial-to-parallel data conversion
• High-speed operation with TTL compatibility
• Tri-state outputs for easy bus interfacing
• Internal asynchronous reset for initialization
• Clock input for synchronized data transfer
• Output enable pin for controlling the output state

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick data transfer - TTL compatibility ensures easy integration with existing systems - Tri-state outputs facilitate bus interfacing - Internal reset simplifies initialization process

Disadvantages: - Limited to 16-bit parallel output - Requires an external clock signal for data transfer

Working Principles

The SN74ALS1645ADWG4 is a shift register that converts serial data into parallel output. The serial data is input through the SER pin and shifted into the register on each rising edge of the CLK signal. The parallel outputs (QA-QN) represent the stored data in parallel format. The OE pin controls the output state, enabling or disabling the outputs. The RST pin asynchronously resets the register to its initial state.

Detailed Application Field Plans

The SN74ALS1645ADWG4 can be used in various applications, including:

1. Data communication systems
2. Serial-to-parallel data conversion in microcontrollers
3. LED matrix displays
4. Digital signal processing
5. Shift register-based counters

Detailed and Complete Alternative Models

1. SN74ALS1645AN: DIP (Dual In-line Package) version of the same shift register
2. SN74ALS1645ADR: SOIC package with different pin configuration
3. SN74ALS1645APWR: TSSOP (Thin Shrink Small Outline Package) version with smaller footprint
4. SN74ALS1645ADL: Ceramic DIP package for high-reliability applications

These alternative models offer similar functionality but may differ in package type, pin configuration, or temperature range.

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