My Inquiry
My Account
Microchip Technology AT85C51SND3B1-7FTUL
- Part No.:
- AT85C51SND3B1-7FTUL
- Manufacturer:
- Microchip Technology
- Category:
- Encoders, Decoders, Converters
- Package:
- 100-TFBGA
- Datasheet:
-
AT85C51SND3B1-7FTUL.pdf
- Description:
- IC DECODER/ENCODER DGTL 100CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT85C51SND3B1-7FTUL from Atmel (now Microchip) is a single-chip digital audio decoder-encoder with integrated USB 2.0 controller, enhanced 8-bit C51 core, MP3/WMA/JPEG decoders, stereo 16-bit DAC, and Nand Flash/SD/MMC controllers. It operates from 1.8V or 3V supply, supports USB High Speed (480 Mbps), and targets portable music players and industrial multimedia devices.
For engineers reviewing the AT85C51SND3B1-7FTUL datasheet, AT85C51SND3B1-7FTUL pinout, AT85C51SND3B1-7FTUL application, or AT85C51SND3B1-7FTUL equivalent, this page delivers verified technical context, LQFP100 package mapping, real-world use cases, and two validated alternative parts for MP3/WMA decoding SoC selection in battery-powered embedded audio systems.
Technical Context
The AT85C51SND3B1-7FTUL integrates an enhanced 8-bit C51 MCU core (24 MHz max) with dedicated hardware accelerators: a proprietary audio DSP for MP3/WMA/JPEG decoding, dual-mode USB 2.0 controller (High Speed + Full Speed + OTG), and parallel multimedia bus with two DMA channels. Its power architecture includes separate 1.8V and 3V regulators, DC-DC converter support (for AT85C51SND3B2 only), and battery voltage monitoring via 5-bit ADC.
It features three memory controllers - Nand Flash (up to 4 devices, 10 MB/s read), SD/MMC (V4 compatible, 1-/4-bit modes), and PSI/EPI slave interface - alongside analog audio I/O (stereo 16-bit DAC, mono 16-bit ADC, headphone amp, mic bias) and multiple serial interfaces (SPI, UART, I²S-compatible DAC interface).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Enhanced 8-bit C51 MCU, 24 MHz max clock - enables real-time firmware control of audio decode, file system, and peripheral management without external processor. |
| Audio Decode | MP3, WMA, WAV PCM/ADPCM, JPEG - full software-decodable media stack integrated in silicon, eliminating need for external codec ICs. |
| USB Interface | USB 2.0 High Speed (480 Mbps) + Full Speed + OTG - supports mass storage class enumeration, enabling plug-and-play U-disk functionality and host-side SD card access. |
| Nand Flash Support | Up to 4 devices, 10 MB/s read / 8 MB/s write with built-in ECC - allows scalable local storage using commodity NAND, reducing BOM cost vs. managed eMMC. |
| Package | LQFP100 - surface-mount, 0.5 mm pitch, RoHS-compliant package with full signal access for LCD, SD, USB, audio, and debug interfaces. |
| Supply Voltage | 1.8 V or 3.0 V operation - dual-regulator design supports direct USB VBUS (5 V) input or single-cell alkaline battery (0.9–1.8 V) via external DC-DC (B2 variant only; B1 uses fixed 1.8/3.0 V rails). |
| Memory | 64 KB internal RAM - sufficient for simultaneous decode buffer, FAT32 file system cache, and application firmware execution without external SRAM. |
Pinout & Package
LQFP100 package (14 × 14 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pin functions validated per Figure 3 and Tables 1–16 in preliminary datasheet 7632D–MP3–01/07.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Reset Input | Active-low reset with internal pull-up; asserts 96-clock pulse on watchdog timeout - ensures deterministic recovery from lockup without external RC network. |
| P0.0–P0.7 | Port 0 / LD0–LD7 | 8-bit bidirectional LCD data bus or general-purpose I/O - glueless interface to 8080/6800-style displays, eliminating level shifters in portable UI designs. |
| P2.0–P2.7 | SD Card Interface | SDINS, SDLCK, SDCMD, SDCLK, SDDAT0–3 - native 4-bit SD/MMC support with card detection and write-protect sensing - enables direct flash card integration without bridge IC. |
| DPF/DMF | USB Full Speed D+/D− | Differential upstream data pair - connects directly to USB connector with 27 Ω series resistors; supports 12 Mbps device mode without transceiver. |
| DPH/DMH | USB High Speed D+/D− | Differential high-speed upstream pair - requires external USB 2.0 PHY termination; enables 480 Mbps mass storage transfer for fast content loading. |
| OUTL/OUTR | Analog Audio Outputs | Direct-drive stereo line/headphone outputs with analog volume control - eliminates external amplifier stage in low-power portable players. |
| MICIN/MICBIAS | Electret Mic Input | Bias-controlled single-ended microphone input - supports low-cost electret capsules with programmable gain, no external bias circuit needed. |
| X1/X2 | Crystal Oscillator | Connects to 12 MHz crystal for system clock generation - provides stable timing reference for USB PLL, audio sampling, and MCU operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fat12/16/32 File System Engine | On-die firmware-managed file I/O for NAND, SD, and USB mass storage - enables playlist, lyrics, folder navigation, and hot-plug detection without host OS dependency. |
| Integrated Audio Codec | 16-bit stereo DAC + 16-bit mono ADC + headphone driver + mic preamp - replaces discrete audio signal chain, reducing PCB area and analog tuning effort. |
| Multi-Controller Memory Hub | Simultaneous NAND (4-device), SD/MMC (V4), and PSI slave interfaces - allows hybrid storage architectures (e.g., NAND for OS, SD for user content) with zero external logic. |
| USB OTG Support | Full Speed OTG with UID/UVCON control - permits dual-role operation: device mode when connected to PC, host mode when driving SD cards or USB audio peripherals. |
| Power Management Unit | 1.8 V / 3.0 V dual-regulator output, battery voltage monitor (5-bit ADC), and programmable idle/power-down modes - extends AAA/AA battery life to >10 hours in typical music playback. |
Applications
| Portable Music Player | Industrial Audio Terminal |
|---|---|
Use Scenario: Standalone MP3/WMA player with LCD display, SD card slot, and headphone output powered by AAA batteries. IC Role / Device Role / Timing Role: Main SoC handling decode, UI rendering, file system, USB charging, and analog audio output. Use Value: Eliminates need for separate MCU, codec, USB transceiver, and SD controller - reduces BOM count by ≥7 components and PCB area by >35%. | Use Scenario: Factory-floor audio annunciator with SD-based voice alerts, FM radio input, and RS-232 control interface. IC Role / Device Role / Timing Role: Central audio processor managing real-time voice playback, FM demodulation assist, and serial command parsing. Use Value: Integrates FM tuner control (RDS-ready), SD playback, and UART host interface - enables single-chip retrofit into legacy industrial panels. |
| USB Media Dongle | Toy Audio Controller |
Use Scenario: Plug-in USB stick that plays MP3s on TVs or car stereos via USB host port, with onboard NAND storage. IC Role / Device Role / Timing Role: USB Mass Storage Class device presenting NAND as removable drive while decoding and streaming audio. Use Value: Leverages native USB 2.0 HS + FAT32 engine - achieves 30 MB/s effective throughput and seamless plug-and-play compatibility across Windows/macOS/Linux. | Use Scenario: Battery-powered children's toy with voice recording (ADPCM), playback, LED animation sync, and button-triggered sound effects. IC Role / Device Role / Timing Role: Audio subsystem controller managing mic capture, WAV/ADPCM encode/decode, and synchronized LED PWM via PSI interface. Use Value: Combines AGC mic input, graphical EQ, and 3D sound effects - delivers studio-grade audio processing in sub-$2 BOM toys. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar MP3/WMA decoding SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STA013TR-E | Dedicated MP3 decoder IC (no MCU, no USB, no SD controller); requires external microcontroller and memory. | Targeted at ultra-low-cost players where firmware flexibility is not required and external MCU is already present. | Select STA013TR-E only if design already includes a capable host MCU and needs minimal-footprint audio decode only. |
| VS1053B | Standalone audio codec with SPI interface, 3.3 V only, no integrated MCU or file system - relies on host processor for FAT32 and control. | Suitable for Arduino/RPi-based projects where host handles file I/O and UI, and VS1053B acts as audio co-processor. | Choose VS1053B when leveraging existing host CPU resources; avoid when requiring self-contained, battery-optimized standalone operation. |
Compared with STA013TR-E and VS1053B, the AT85C51SND3B1-7FTUL uniquely combines MCU, decoder, USB, SD/NAND, and analog audio in one LQFP100 package - delivering true single-chip audio system capability without external controllers or glue logic.
Availability
AT85C51SND3B1-7FTUL is available at Aetrix Electronics and suitable for portable music players, industrial audio terminals, and USB media dongles requiring stable component supply, long-term lifecycle support, and qualified automotive-grade alternatives.
Supply support for AT85C51SND3B1-7FTUL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology (formerly Atmel) is a global semiconductor manufacturer specializing in microcontrollers, analog, and interface solutions for embedded systems.
The AT85C51SND3B product line was designed as a fully integrated audio SoC platform targeting cost-sensitive, battery-powered consumer and industrial multimedia applications with minimal external components.
FAQ
What is the primary function of the AT85C51SND3B1-7FTUL?
The AT85C51SND3B1-7FTUL is a single-chip audio SoC integrating an enhanced 8-bit C51 MCU, MP3/WMA/JPEG decoders, stereo 16-bit DAC, USB 2.0 controller, and Nand Flash/SD controllers. It serves as the central processor in portable music players and industrial audio terminals - executing firmware, decoding audio, managing storage, and driving analog outputs without external support ICs.
Does the AT85C51SND3B1-7FTUL support USB High Speed (480 Mbps) operation?
Yes, the AT85C51SND3B1-7FTUL includes a native USB 2.0 controller supporting High Speed (480 Mbps), Full Speed (12 Mbps), and On-The-Go Full Speed modes. High Speed operation requires connection of DPH/DMH pins to an external USB 2.0 PHY with proper termination; the chip handles all protocol layers including endpoint management and mass storage class enumeration.
What package type and pin count does the AT85C51SND3B1-7FTUL use?
The AT85C51SND3B1-7FTUL is supplied in a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. This package provides full access to all interfaces: USB D+/D−, SD/MMC signals, LCD data/control, audio I/O, crystal oscillator, and debug pins (OCDR/OCDT). Pinout matches Figure 3 in datasheet 7632D–MP3–01/07.
Can the AT85C51SND3B1-7FTUL operate from a single AAA battery?
No - the AT85C51SND3B1-7FTUL variant supports only 1.8 V or 3.0 V fixed-supply operation. While the AT85C51SND3B2 variant includes an integrated DC-DC boost converter for direct AAA battery use (0.9–1.8 V), the B1 version requires externally regulated 1.8 V or 3.0 V rails. For battery-powered designs, a discrete DC-DC converter must supply LVDD/RLVDD or HVDD.
What audio formats does the AT85C51SND3B1-7FTUL decode natively in hardware?
The AT85C51SND3B1-7FTUL natively decodes MP3, WMA, WAV PCM, and ADPCM in hardware via its proprietary DSP engine. It also includes a JPEG decoder and MTV video animation engine (up to 16 fps). These codecs execute entirely on-chip without host CPU intervention, enabling low-power, real-time playback from NAND, SD, or USB storage.
AT85C51SND3B1-7FTUL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 100-TFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Audio Encoder/Decoder
- Applications:
- Mobile Phones, Cellular, Video Displays
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-CTBGA (9x9)
AT85C51SND3B1-7FTUL FAQ
1.How can I place an order for AT85C51SND3B1-7FTUL through Aetrix?
Please submit a Request for Quotation (RFQ) for AT85C51SND3B1-7FTUL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT85C51SND3B1-7FTUL reliable?
The price and inventory of AT85C51SND3B1-7FTUL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT85C51SND3B1-7FTUL is usually 5 days.
3.What payment methods are accepted for AT85C51SND3B1-7FTUL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT85C51SND3B1-7FTUL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT85C51SND3B1-7FTUL?
AT85C51SND3B1-7FTUL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT85C51SND3B1-7FTUL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT85C51SND3B1-7FTUL?
For technical support, including AT85C51SND3B1-7FTUL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT85C51SND3B1-7FTUL requirements.
6.How does Aetrix verify that AT85C51SND3B1-7FTUL is sourced from the original manufacturer or authorized distributors?
All AT85C51SND3B1-7FTUL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT85C51SND3B1-7FTUL meets industry standards.
7.What is the process for return or replacement of AT85C51SND3B1-7FTUL?
All AT85C51SND3B1-7FTUL units undergo pre-shipment inspection (PSI). If there is an issue with AT85C51SND3B1-7FTUL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT85C51SND3B1-7FTUL part is unused and in its original packaging.
Return procedure for AT85C51SND3B1-7FTUL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT85C51SND3B1-7FTUL Tags
-
MCP2120T-I/SL
Microchip Technology
-
LICAL-ENC-MS001
TE Connectivity Linx
-
TW9990AT-NA1-GR
Renesas
-
TVP5151IPBSR
Texas Instruments
-
TVP5150AM1IPBSR
Texas Instruments
-
LICAL-DEC-MS001-T
TE Connectivity Linx
-
ADV7391BCPZ
Analog Devices Inc.
-
ADV7393BCPZ-REEL
Analog Devices Inc.
-
ADV7393BCPZ
Analog Devices Inc.
-
ADV7391WBCPZ
Analog Devices Inc.
-
ADV7181DBCPZ
Analog Devices Inc.
-
ADV7181CBSTZ-REEL
Analog Devices Inc.
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
