Encyclopedia Entry: 74ALVCH16245GRDR

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Signal Buffer/Transceiver
• Characteristics: High-speed, low-power, bidirectional voltage level translator
• Package: Green RoHS-compliant package (GRDR)
• Essence: The 74ALVCH16245GRDR is a 16-bit bus transceiver with 3-state outputs, designed to provide bidirectional level translation between two independent voltage domains.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 3.6V
• Input Voltage Range (Vref): -0.5V to VCC + 0.5V
• Output Voltage Range (Vref): -0.5V to VCC + 0.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 2.4ns (max) at 3.3V supply, 20pF load
• Output Drive Capability: ±24mA at 3.3V supply
• Input Capacitance: 3.5pF (typical)

Detailed Pin Configuration

The 74ALVCH16245GRDR has a total of 48 pins, arranged as follows:

A1 1 ────────────────────── 48 VCCB B1 2 ────────────────────── 47 OE# A2 3 ────────────────────── 46 B2 B2 4 ────────────────────── 45 A2 A3 5 ────────────────────── 44 B3 B3 6 ────────────────────── 43 A3 A4 7 ────────────────────── 42 B4 B4 8 ────────────────────── 41 A4 A5 9 ────────────────────── 40 B5 B5 10 ────────────────────── 39 A5 A6 11 ────────────────────── 38 B6 B6 12 ────────────────────── 37 A6 A7 13 ────────────────────── 36 B7 B7 14 ────────────────────── 35 A7 A8 15 ────────────────────── 34 B8 B8 16 ────────────────────── 33 A8 GND 17 ────────────────────── 32 B9 OE# 18 ────────────────────── 31 A9 B9 19 ────────────────────── 30 GND A9 20 ────────────────────── 29 B10 GND 21 ────────────────────── 28 A10 VCCA 22 ────────────────────── 27 B11 VCCB 23 ────────────────────── 26 A11 B10 24 ────────────────────── 25 GND

Functional Features

• Bidirectional voltage level translation between two independent voltage domains.
• 3-state outputs allow multiple devices to share a common bus.
• High-speed operation with low power consumption.
• Supports hot insertion and removal of devices without causing bus contention or data corruption.

Advantages and Disadvantages

Advantages: - Provides seamless voltage level translation, enabling communication between different voltage domains. - Low power consumption makes it suitable for battery-powered applications. - High-speed operation allows for efficient data transfer. - 3-state outputs enable multiple devices to share a common bus.

Disadvantages: - Limited to 16-bit bus width, may not be suitable for applications requiring larger data buses. - Requires careful consideration of input and output voltage levels to ensure proper functionality.

Working Principles

The 74ALVCH16245GRDR utilizes a combination of MOSFETs and CMOS technology to achieve bidirectional voltage level translation. It employs a voltage reference (Vref) to determine the logic thresholds for input and output signals. When an input signal from one voltage domain is applied, the IC translates it to the corresponding voltage level of the other domain and drives the output accordingly. The 3-state outputs allow the device to be effectively disconnected from the bus when