My Inquiry
My Account
Microchip Technology AT85C51SND3B1-RTTUL
- Part No.:
- AT85C51SND3B1-RTTUL
- Manufacturer:
- Microchip Technology
- Category:
- Encoders, Decoders, Converters
- Package:
- 100-LQFP
- Datasheet:
-
AT85C51SND3B1-RTTUL.pdf
- Description:
- IC DECODER/ENCODER DGTL 100-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,068
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT85C51SND3B1-RTTUL from Atmel (now Microchip) is a single-chip digital audio decoder-encoder SoC integrating an enhanced 8-bit C51 core, MP3/WMA/JPEG decoders, stereo audio codec with 16-bit DACs and microphone ADC, USB 2.0 high-speed device/host/OTG controller, NAND flash and SD/MMC controllers, and power management for battery-powered portable media players. It operates from 1.8V or 3V supply and supports real-time MTV video playback at up to 16 fps.
For engineers reviewing the AT85C51SND3B1-RTTUL datasheet, AT85C51SND3B1-RTTUL pinout, AT85C51SND3B1-RTTUL application, or AT85C51SND3B1-RTTUL equivalent, key selection considerations include its integrated MP3+WMA+JPEG decode capability, dual-voltage power architecture (1.8V/3V), LQFP100 package compatibility, USB 2.0 OTG support, and on-chip 64KB RAM for firmware execution - all critical for rapid development of cost-sensitive portable audio devices.
Technical Context
The AT85C51SND3B1-RTTUL implements a tightly coupled multimedia SoC architecture: its enhanced C51 core (24 MHz max) executes application firmware while dedicated hardware accelerators handle MP3/WMA decoding, JPEG decompression, and MTV animation rendering. The audio subsystem includes a 16-bit stereo DAC with headphone amplifier and analog volume control, plus a 16-bit mono ADC for microphone/line input with AGC.
Its memory interface supports up to four NAND flash devices (10 MB/s read, 8 MB/s write) and SD/MMC cards in 1-bit or 4-bit modes, managed via a 16-bit multimedia bus with two DMA channels. USB 2.0 operation includes full-speed (12 Mbps) and high-speed (480 Mbps) device modes plus OTG functionality using UVCON/UID pins and internal VBUS control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Enhanced 8-bit C51, 24 MHz max clock - enables real-time audio decode and UI processing in resource-constrained portable designs. |
| Audio Decode | MP3, WMA, WAV PCM/ADPCM, JPEG - eliminates need for external codecs or DSPs in music player applications. |
| USB Interface | USB 2.0 High-Speed (480 Mbps) + Full-Speed (12 Mbps) + OTG - supports mass storage class, firmware updates, and host-side card reading without external PHY. |
| Memory Controllers | NAND Flash (4-device support, 10 MB/s read), SD/MMC (V4 compatible, 1-/4-bit) - enables flexible, high-capacity local storage with hardware ECC and write protection. |
| Analog I/O | 16-bit stereo DAC (headphone out), 16-bit mono ADC (mic/line in), 3-band EQ + bass boost - delivers consumer-grade audio quality with minimal external components. |
| Power Supply | 1.8V or 3V nominal operation; supports single AAA/AA battery (0.9–1.8V) via internal DC-DC - enables ultra-low-power portable operation with battery voltage monitoring (5-bit ADC). |
| Package | LQFP100 - provides full signal access for LCD, keyboard, FM tuner, USB, and memory interfaces in compact form factor. |
Pinout & Package
LQFP100 package with 0.5 mm pitch; thermally enhanced exposed pad; RoHS-compliant; pin-compatible with AT85C51SND3B2 variant except for ADC-related pins (OUTL/OUTR/MICIN/LINL/LINR/AREF/AVCM not connected on B1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Reset Input | Active-low reset with internal pull-up; asserts 96-clock pulse on watchdog timeout; required for reliable boot and recovery sequences. |
| P0.0–P0.7 | Port 0 / LCD/SD Data Bus | 8-bit bidirectional I/O with internal pull-ups; multiplexed as LD0–LD7 (LCD) or SD0–SD7 (SD/MMC) - used for display interface or memory data transfer. |
| P3.0–P3.3 | UART/SPI/Interrupt Interface | Configurable as RXD/TXD (UART), MISO/MOSI/SCK/SS (SPI), or INT0/INT1/RTS/CTS - enables serial communication with baseband processors or peripherals. |
| DPF/DMF/DPH/DMH | USB Differential Data Lines | Full-speed (DPF/DMF) and high-speed (DPH/DMH) USB upstream pairs - require controlled-impedance routing and ESD protection per USB spec. |
| UVCON/UID | USB OTG Control | UVCON drives external VBUS switch; UID senses ID pin state - essential for OTG role negotiation and power management in dual-role systems. |
| LVDD/RLVDD/HVDD | Power Supply Outputs | LVDD = 1.8V DC-DC output (battery); RLVDD = 1.8V regulator output (USB/3V); HVDD = 3V regulator output - enables mixed-voltage system design with automatic source selection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MP3+WMA+JPEG Decoder | Hardware-accelerated decode eliminates external DSP, reduces BOM cost, and ensures deterministic real-time playback at ≤16 fps MTV video. |
| USB 2.0 OTG with On-Chip PHY | Supports device, host, and OTG roles without external transceiver - simplifies USB connectivity for firmware updates, mass storage, and SD card reading. |
| Dual-Voltage Power Architecture | Internal 1.8V DC-DC (from 0.9–1.8V battery) and 3V regulator (from USB/external 3V) enable seamless power-source switching and extended battery life. |
| 64 KB On-Chip RAM | Configurable as code/data space for firmware execution - removes need for external SRAM and accelerates boot time and audio buffer handling. |
| Fat12/16/32 File System Engine | Hardware-managed file I/O across NAND, SD, MMC, and USB mass storage - enables plug-and-play media access without host OS dependency. |
Applications
| Portable MP3/WMA Player | USB Media Adapter |
|---|---|
Use Scenario: Standalone handheld music player with LCD display, keypad, headphone jack, and microSD slot. IC Role / Device Role / Timing Role: Primary SoC managing audio decode, UI rendering, file system navigation, USB mass storage enumeration, and battery-powered operation. Use Value: Reduces bill-of-materials by integrating codec, USB PHY, NAND controller, and MCU - enabling sub-$15 retail BOM for feature-rich players. | Use Scenario: Compact dongle that reads SD cards or USB sticks and streams audio to car stereos via line-out or FM transmitter. IC Role / Device Role / Timing Role: USB host controller interfacing with removable media, performing FAT parsing, MP3 decode, and analog audio output generation. Use Value: Enables direct playback from legacy storage without smartphone dependency - leverages built-in SD/MMC and USB host controllers with zero external logic. |
| Industrial Audio Annunciator | Toy Audio Module |
Use Scenario: Factory floor audio alert system playing localized voice messages or alarm tones from NAND flash based on PLC triggers. IC Role / Device Role / Timing Role: Slave-mode controller receiving commands via PSI or UART, fetching preloaded WAV/ADPCM files, and driving line-out or speaker amplifier. Use Value: Provides robust, low-latency audio playback with AGC and EQ tuning - ideal for noisy environments where consistent volume and clarity are critical. | Use Scenario: Interactive learning toy with voice recording, playback, and simple games using onboard mic and speaker. IC Role / Device Role / Timing Role: Self-contained audio subsystem handling mic input (AGC), WAV encode/decode, button-driven UI, and battery management. Use Value: Eliminates need for separate MCU, codec, and USB IC - allows single-chip implementation of record/playback features with <10 mA active current draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STA013TR-E | Dedicated MP3 decoder IC (no MCU, no USB, no NAND controller); requires external microcontroller and memory. | Targeted at simpler, lower-cost MP3-only players without file system or USB host capability. | Select when only MP3 decode is needed and system already includes MCU and storage interface - avoids over-specification. |
| VS1053B | Audio codec + MP3/WMA decoder with SPI interface; no integrated MCU, no USB, no NAND/SD controllers; requires external flash for firmware. | Suitable for MCU-based designs needing offload decoding with minimal footprint - lacks SoC-level integration. | Choose for Arduino/RPi-based projects where host processor handles UI/file system and only audio decode acceleration is required. |
Compared with STA013TR-E and VS1053B, the AT85C51SND3B1-RTTUL provides full SoC integration - combining MCU, USB 2.0 OTG, NAND/SD controllers, and multi-format decode - making it optimal for standalone, battery-powered media devices requiring minimal external components and fast time-to-market.
Availability
AT85C51SND3B1-RTTUL is available at Aetrix Electronics and suitable for portable media players, USB audio adapters, industrial annunciators, and educational toys requiring stable component supply and long-term production continuity.
Supply support for AT85C51SND3B1-RTTUL 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 (acquired Atmel in 2016) is a leading provider of microcontrollers, analog, and Flash-IP solutions for embedded control and connectivity applications.
The AT85C51SND3B product line was designed as a highly integrated audio SoC platform targeting cost-sensitive, battery-powered portable media devices - delivering complete decode, storage, UI, and connectivity functions in a single LQFP100 package.
FAQ
What audio formats does the AT85C51SND3B1-RTTUL support natively in hardware?
The AT85C51SND3B1-RTTUL supports MP3, WMA, WAV PCM, ADPCM, and JPEG decoding entirely in hardware - no external DSP or software libraries required. It also enables MTV video animation playback at up to 16 fps using on-chip resources. These capabilities are confirmed in the preliminary datasheet 7632D–MP3–01/07 and apply specifically to the AT85C51SND3B1-RTTUL variant.
Does the AT85C51SND3B1-RTTUL include an integrated USB PHY, and what speeds does it support?
Yes, the AT85C51SND3B1-RTTUL integrates a full USB 2.0 PHY supporting High-Speed (480 Mbps), Full-Speed (12 Mbps), and On-The-Go (OTG) operation. Its DPF/DMF (full-speed) and DPH/DMH (high-speed) pins connect directly to USB connectors with appropriate ESD protection. This eliminates the need for external USB transceivers in compliant designs.
What is the difference between AT85C51SND3B1-RTTUL and AT85C51SND3B2 variants?
The AT85C51SND3B1-RTTUL lacks the analog audio output pins (OUTL/OUTR), input pins (MICIN/LINL/LINR), and reference pins (AREF/AVCM) present on the AT85C51SND3B2. Per datasheet notes, these signals are "not connected" on B1. Both share identical MCU core, USB, memory controllers, and digital interfaces - making B1 suitable for systems using external audio codecs.
Can the AT85C51SND3B1-RTTUL operate from a single AAA battery, and how is power managed?
Yes, the AT85C51SND3B1-RTTUL supports 0.9–1.8V single-cell alkaline battery operation via its internal DC-DC converter, which generates regulated 1.8V (LVDD). Power management includes battery voltage monitoring (5-bit ADC), programmable idle/power-down modes, and automatic DC-DC disable when USB or 3V supply is detected - extending battery life significantly.
What memory types and capacities does the AT85C51SND3B1-RTTUL support for local storage?
The AT85C51SND3B1-RTTUL supports up to four NAND flash devices (any page size, up to 10 MB/s read), SD/MMC cards (V4 compatible, 1-/4-bit modes), and USB mass storage devices. Its built-in Fat12/16/32 file system engine manages multiple drives and folders - enabling seamless media access without host OS involvement.
AT85C51SND3B1-RTTUL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 100-LQFP
- 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-LQFP (14x14)
AT85C51SND3B1-RTTUL FAQ
1.How can I place an order for AT85C51SND3B1-RTTUL through Aetrix?
Please submit a Request for Quotation (RFQ) for AT85C51SND3B1-RTTUL 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-RTTUL reliable?
The price and inventory of AT85C51SND3B1-RTTUL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT85C51SND3B1-RTTUL is usually 5 days.
3.What payment methods are accepted for AT85C51SND3B1-RTTUL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT85C51SND3B1-RTTUL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT85C51SND3B1-RTTUL?
AT85C51SND3B1-RTTUL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT85C51SND3B1-RTTUL 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-RTTUL?
For technical support, including AT85C51SND3B1-RTTUL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT85C51SND3B1-RTTUL requirements.
6.How does Aetrix verify that AT85C51SND3B1-RTTUL is sourced from the original manufacturer or authorized distributors?
All AT85C51SND3B1-RTTUL 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-RTTUL meets industry standards.
7.What is the process for return or replacement of AT85C51SND3B1-RTTUL?
All AT85C51SND3B1-RTTUL units undergo pre-shipment inspection (PSI). If there is an issue with AT85C51SND3B1-RTTUL, 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-RTTUL part is unused and in its original packaging.
Return procedure for AT85C51SND3B1-RTTUL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT85C51SND3B1-RTTUL 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
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
