AT7456E

AT7456E – Single-Channel, Monochrome On-Screen Display (OSD) Generator

📌 Product Overview

The AT7456E is a single-channel, monochrome On-Screen Display (OSD) generator with integrated EEPROM, developed by Hangzhou Zhongke Microelectronics Co., Ltd. The device integrates a video driver, sync separator, video switch, and EEPROM memory, significantly enhancing system integration and reducing overall cost. The AT7456E offers pin-to-pin compatibility with the industry-standard MAX7456, making it an ideal upgrade or drop-in replacement.

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⚙️ Key Specifications

Parameter	Value
Operating Voltage (VAVDD/VDVDD/VPVDD)	3.15V to 5.25V (Supports 3.3V operation)
Total Operating Current (Typical @3.3V)	25.8 mA (Low-power design)
Supported Video Standards	NTSC and PAL
User-Programmable Characters	512 characters (Stored in EEPROM)
Maximum Display Characters	16 rows × 30 columns
Character Size	12 × 18 pixels
Interface	SPI-compatible serial interface
Operating Temperature Range	-40°C to +85°C
Package Options	TSSOP-28 (with exposed pad) or LGA-16

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✨ Key Features

• Enhanced OSD Engine: Integrates video driver, sync separator, and EEPROM. Supports 512 user-defined characters (12×18 pixels) with brightness adjustment per row, plus blinking, inverse, and background control features.
• Flexible Display Control: Video driver output with cable compensation, built-in sync generator, and support for external composite sync input. Compatible with both NTSC and PAL standards.
• Low-Power 3.3V Operation: Consumes only 25.8 mA typical total current at 3.3V — one-quarter the power of legacy 5V OSD chips. Ideal for battery-powered and power-sensitive applications.
• Glitch-Free Character Updates: Allows character updates at any time (no vertical blanking required) without display artifacts, simplifying MCU control logic.
• Expanded Character Storage: Extended EEPROM capacity to 480 characters, plus an additional 32 SRAM-based characters, providing richer character storage options.

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📦 Packaging & Ordering Information

Ordering Part Number	AT7456E (TSSOP-28-EP package)
Ordering Part Number	AT7456ELAH (LGA-16 package)
Minimum Package Quantity (TSSOP-28)	Tape & Reel packaging
Minimum Package Quantity (LGA-16)	4,000 pieces per reel
Product Status	Active (In Production)

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🔧 Key Applications

• Drone FPV Systems: Overlay flight telemetry data (altitude, speed, voltage, etc.)
• Security & Surveillance Cameras: Overlay timestamps and camera ID information
• Industrial Monitoring & Test Equipment: Display measurement data and status information
• Indoor Entertainment Systems & Consumer Electronics: Overlay characters and graphics
• MAX7456 Drop-in Replacement: Provides hardware pin-to-pin compatibility with nearly identical SPI control timing

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⚡ Architecture Advantages

The AT7456E is specifically designed for video OSD overlay applications. Its key differentiators over previous-generation or competing devices include:

• Significant Power Reduction: Supports 3.3V operation with only 25.8 mA typical total current (@3.3V), effectively extending battery life in portable equipment.
• Simplified Software Development: Supports VRAM updates at any time without display artifacts, eliminating rigid dependency on VSYNC signals and enabling simpler, more flexible MCU control logic.
• Larger Character Storage: Provides 512 user-programmable characters (including SRAM-based characters), facilitating display of more custom graphics and fonts.

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📋 Compliance & Environmental

RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	MSL Level 3
Data Retention	100 Years
Endurance (Erase/Write Cycles)	100,000 cycles

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For complete technical documentation including the full datasheet and application notes, as well as sample requests, please visit the Hangzhou Zhongke Microelectronics official website or contact your authorized distributor.