Single-Channel OSD Generator · NTSC/PAL Auto-Detect · SPI · 256 Programmable Characters · TSSOP-28 · Analog Devices (Maxim Integrated)
| Part Number | MAX7456 |
|---|---|
| Manufacturer | Analog Devices (Maxim Integrated) |
| Device Type | Single-Channel Monochrome OSD Generator |
| Video Standards | NTSC (525 lines / 60 Hz) and PAL (625 lines / 50 Hz), auto-detect |
| Character Resolution | 12 × 18 pixels per character |
| Display Matrix | 16 rows × 30 columns (480 total characters) |
| User-Programmable Characters | 256 NVM characters (non-volatile memory) |
| Character Attributes | White, black, transparent background; local/full background control |
| Insertion Modes | Internal sync generator or external video sync |
| Package | TSSOP-28 (9.7 × 4.4 mm) |
| Supply Voltage | 4.75 V – 5.25 V |
| Operating Temperature | −40°C to +85°C |
| Supply Voltage (VCC) | 4.75 V – 5.25 V |
|---|---|
| Analog Supply (PVCC) | 4.75 V – 5.25 V |
| Supply Current (Active) | ~29 mA typical (video active) |
| Supply Current (Standby) | ~1 mA typical |
| Shutdown Current | < 10 µA |
| Input Video Level | 0.5 V – 2.0 Vp-p (composite video) |
| Output Video Level | 1.0 Vp-p into 75 Ω load |
| DAC Resolution (Video) | 8-bit |
| Pixel Clock | ~27 MHz internal generation |
| NVM Endurance | ~100,000 write cycles |
| Digital Interface | SPI (4-wire: SDI, SDO, SCLK, CSn) |
|---|---|
| SPI Clock Rate | up to 10 MHz |
| SPI Mode | Mode 0 (CPOL = 0, CPHA = 0) |
| Video Input | Composite video (CVBS), AC-coupled |
| Video Output | Composite video with OSD overlay, AC-coupled |
| Sync Detection | Automatic NTSC/PAL detection with LOS (Loss of Sync) flag |
| Interrupt Output | Vertical sync (VSYNC) interrupt available |
| Character Memory | 256 × 54 bytes NVM for user-defined character bitmaps |
| Display Memory | 480 bytes SRAM for screen character map |
| Pins | 28-pin TSSOP (SDI, SDO, SCLK, CSn, VIN, VOUT, LOS, RESET, HSYNC, VSYNC, NVM, ×10 GND/VCC/PVCC) |
| Part Number | MAX7456 |
|---|---|
| Orderable Qty | 1 pcs – 10,000+ pcs |
| Price (1–9 pcs) | Contact for quote |
| Price (10–99 pcs) | Contact for quote |
| Price (100–499 pcs) | Contact for quote |
| Price (500+ pcs) | Best pricing available |
| Lead Time (stock) | 3–7 business days |
| Packaging | Tape & Reel (T&R) |
| RoHS Compliant | Yes (Pb-free) |
Please confirm exact parameters with manufacturer datasheet.
The MAX7456 is a single-channel monochrome on-screen display (OSD) generator from Analog Devices (formerly Maxim Integrated). It overlays user-programmable text and graphics onto standard NTSC or PAL composite video signals, making it the go-to solution for FPV drone flight data display. With 256 non-volatile user-programmable characters, it can render telemetry info, battery voltage, GPS coordinates, altitude, and custom icons directly onto the pilot's video feed.
The MAX7456 automatically detects the incoming video standard (NTSC or PAL) and synchronizes its overlay precisely to the video raster. It supports a full 16-row × 30-column character matrix, providing up to 480 characters on screen simultaneously — more than enough space for comprehensive flight telemetry, warnings, and status indicators that FPV pilots need during flight.
The chip communicates via a simple 4-wire SPI interface at up to 10 MHz, enabling rapid screen updates from any microcontroller including STM32, ATmega328P (Arduino), or GD32. This makes it compatible with popular open-source OSD firmware including MWOSD (MultiWii OSD), ScarabOSD, and custom Betaflight/iNav OSD implementations. Its compact TSSOP-28 package is easy to hand-solder and integrates neatly into DIY drone builds.
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