AT7456E Package and Pinout Reference
The AT7456E is a single-chip On-Screen Display (OSD) generator designed for FPV (First-Person View) drones and other video systems. It overlays flight data and other information onto the video stream. This article details its features, specifications, and provides a reference for its pinout and usage.
Table of Contents
1. Overview and Core Features
The AT7456E is a popular choice for flight controllers in the FPV community. It integrates a character-based OSD with an EEPROM for font storage, and supports both NTSC and PAL video standards. Its low power consumption and small footprint make it ideal for compact drone builds. Communication with the host microcontroller is handled via an SPI interface.
2. Specifications and Parameter Table
| Parameter | Value |
|---|---|
| Function | On-Screen Display (OSD) Generator |
| Video Standards | NTSC / PAL |
| Font Storage | Internal EEPROM |
| Interface | SPI |
| Supply Voltage | 3.3V to 5V |
| Package | QFN-24 |
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Check AT7456E Stock3. Architecture and Block Diagram
The AT7456E combines a video synchronization circuit, a character generator, and control logic into a single IC. It reads character data from an internal EEPROM and overlays it onto an incoming analog video signal. The SPI interface allows a microcontroller to update the display memory and configure the OSD parameters.
4. Video: Feature Breakdown
5. Equivalents, Cross-Reference, and Lifecycle
The AT7456E is a widely used and actively produced component in the FPV and drone market. While direct, pin-compatible replacements are uncommon, other OSD generator chips exist. However, they typically require software changes for integration.
6. Frequently Asked Questions (FAQ)
What is the main use of the AT7456E?
It is primarily used in flight controllers for FPV drones to display real-time telemetry data (like battery voltage, altitude, and speed) on the pilot's video feed.
Is the AT7456E compatible with modern flight controller software?
Yes, the AT7456E is supported by popular open-source flight controller firmwares like Betaflight and iNav, which have built-in drivers for it.
Alan Carter, Senior Hardware Engineer
Alan has over 15 years of experience in embedded systems design, specializing in ARM Cortex architectures, PCB routing for high-speed digital signals, and industrial IoT deployments. He frequently contributes technical teardowns and architecture comparisons.
