SN74AS874DWRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: High-speed, low-power, octal D-type transparent latch
• Package: SOIC-20 (Small Outline Integrated Circuit), Wide Body
• Essence: Latch that stores and outputs digital data
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (typical)
• Output Drive Capability: ±24mA

Detailed Pin Configuration

The SN74AS874DWRG4 has a total of 20 pins, which are assigned as follows:

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

Functional Features

• Octal transparent latch with 3-state outputs
• Latch enable (LE) input controls the storage of data
• Clock input (CLK) synchronizes the data transfer
• Outputs can be disabled using the output enable (OE) input

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Wide operating temperature range - Compact SOIC package for space-saving designs

Disadvantages: - Limited output drive capability - Requires external clock signal for proper operation

Working Principles

The SN74AS874DWRG4 is a transparent latch that stores and outputs digital data. When the latch enable (LE) input is high, the data inputs (D0-D7) are transferred to the corresponding outputs (Q0-Q7) on the rising edge of the clock input (CLK). The outputs remain latched until the LE input goes low. The output enable (OE) input can be used to disable the outputs, placing them in a high-impedance state.

Detailed Application Field Plans

The SN74AS874DWRG4 is commonly used in various digital logic applications, including:

1. Microprocessor systems
2. Data storage systems
3. Communication equipment
4. Industrial control systems
5. Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74AS874DWRG4 include:

1. SN74LS374: Octal D-type flip-flop with 3-state outputs
2. SN74HC574: Octal D-type flip-flop with 3-state outputs, CMOS technology
3. SN74LVC373: Octal transparent latch with 3-state outputs, low-voltage CMOS technology
4. SN74LVTH373: Octal transparent latch with 3-state outputs, low-voltage TTL-compatible technology

(Note: This list is not exhaustive and there may be other alternative models available in the market.)

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