Encyclopedia Entry: 74ALVCH16821DGGS

Basic Information Overview

• Product Name: 74ALVCH16821DGGS
• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: High-speed, low-power, voltage level shifting
• Package: DGGS (TSSOP-56)
• Essence: Translates logic levels between different voltage domains
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Logic Family: ALVCH
• Number of Channels: 18
• Input Voltage Range (VCC): 1.2V to 3.6V
• Output Voltage Range (VCCA/VCCB): 1.2V to 3.6V
• Propagation Delay: 2.5ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74ALVCH16821DGGS has a TSSOP-56 package with the following pin configuration:

VCCB 1 56 VCCA B1_IN 2 55 A1_OUT B2_IN 3 54 A2_OUT B3_IN 4 53 A3_OUT B4_IN 5 52 A4_OUT B5_IN 6 51 A5_OUT B6_IN 7 50 A6_OUT B7_IN 8 49 A7_OUT B8_IN 9 48 A8_OUT B9_IN 10 47 A9_OUT B10_IN 11 46 A10_OUT B11_IN 12 45 A11_OUT B12_IN 13 44 A12_OUT B13_IN 14 43 A13_OUT B14_IN 15 42 A14_OUT B15_IN 16 41 A15_OUT B16_IN 17 40 A16_OUT B17_IN 18 39 A17_OUT B18_IN 19 38 A18_OUT GND1 20 37 GND2

Functional Features

• Translates logic levels between two voltage domains (VCCA and VCCB)
• Supports bidirectional level shifting
• High-speed operation with low propagation delay
• Low power consumption
• Provides voltage translation for up to 18 channels simultaneously

Advantages and Disadvantages

Advantages: - Enables seamless communication between different voltage domains - High-speed operation allows for efficient data transfer - Low power consumption helps in reducing overall system energy requirements - Compact package size (TSSOP-56) facilitates space-constrained designs

Disadvantages: - Limited to voltage translation within the specified input and output voltage ranges - May require additional components for more complex level shifting scenarios

Working Principles

The 74ALVCH16821DGGS operates by utilizing a combination of MOSFETs and CMOS technology. It employs a voltage level shifting technique to translate logic signals between two different voltage domains. The inputs (B1IN to B18IN) are connected to one voltage domain (VCCB), while the outputs (A1OUT to A18OUT) are connected to another voltage domain (VCCA). The IC ensures that logic signals received at the inputs are correctly translated to the corresponding voltage levels at the outputs, allowing seamless communication between different parts of a system operating at different voltages.

Detailed Application Field Plans

The 74ALVCH16821DGGS finds applications in various fields where logic level translation is required. Some common application areas include: - Microcontroller interfacing with peripherals operating at different voltage levels - Communication systems involving multiple voltage domains - Battery-powered devices requiring efficient level shifting for power conservation - Industrial automation and control systems

Detailed and Complete Alternative Models

• 74ALVC16821DGGS: Similar to 74ALVCH16821DGGS but operates at a lower voltage range (1.0V to 3.6V)
• 74LVC16821ADGVRG4: Low-voltage CMOS version with similar functionality and pin configuration
• SN74AVC16821DGGR: Texas Instruments alternative with comparable specifications and features

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