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Microchip Technology AT49BV4096A-12RI
- Part No.:
- AT49BV4096A-12RI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-SOIC (0.525", 13.34mm Width)
- Datasheet:
-
AT49BV4096A-12RI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 44SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,186
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Product details
Overview
AT49BV4096A-12RI from Microchip Technology (formerly Atmel) is a 4-Mbit (512K × 8 / 256K × 16) 3V-only CMOS Flash memory with bottom-boot sector architecture, 120 ns read access time, 10-second sector erase time, and hardware data protection. It operates across −40°C to +85°C for industrial embedded systems requiring nonvolatile firmware storage with boot code integrity.
For engineers reviewing the AT49BV4096A-12RI datasheet, AT49BV4096A-12RI pinout, AT49BV4096A-12RI application, or AT49BV4096A-12RI equivalent, key selection considerations include its bottom-boot block (00000H–01FFFH), BYTE pin–controlled byte/word mode, RDY/BUSY support (TSOP only), VPP optional acceleration, and 10,000-program-cycle endurance.
Technical Context
This device implements a command-based flash architecture with internal erase/program control logic, eliminating external high-voltage programming requirements. Its four-sector memory map includes an 8K-word boot block (write-lockable), two 4K-word parameter blocks, and a 240K-word main array - all accessible via standard CE/OE/WE control signals compatible with microprocessor buses.
Operation supports both byte (I/O0–I/O7 active, I/O15 = A−1) and word (I/O0–I/O15 active) modes selected by the BYTE pin. Data polling (I/O7 complement) and toggle-bit (I/O6) mechanisms provide software-controlled program/erase completion detection, while hardware protections include VCC sense, noise filtering, and reset-driven boot-block override at 12 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8 or 256K × 16 organization) |
| Read Access Time | 120 ns - enables direct replacement of EPROMs in legacy 5 MHz bus systems |
| Supply Voltage | 2.7 V to 3.6 V - single-supply operation compatible with 3.3 V logic domains |
| Sector Erase Time | 10 seconds typical - allows selective firmware updates without full chip reprogramming |
| Program Time | 30 µs per byte/word - supports efficient in-system reprogramming during field upgrades |
| Endurance | 10,000 write/erase cycles - validated for long-term use in industrial control firmware storage |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications |
| Standby Current | 50 µA CMOS - minimizes power draw in sleep-mode systems like remote sensors |
Pinout & Package
AT49BV4096A-12RI is available in 48-lead TSOP (Type 1, 48T) package with 0.5 mm pitch and 12 mm × 20 mm footprint. Pin compatibility follows JEDEC MO-142 D outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 512K-byte addressing in byte mode |
| I/O0–I/O7 | Data I/O (Byte Mode) | Active bidirectional data path when BYTE = 0; I/O8–I/O14 tri-stated |
| I/O0–I/O15 | Data I/O (Word Mode) | Active 16-bit data path when BYTE = 1 or floating; supports 256K-word configuration |
| I/O15 / A−1 | Multiplexed Terminal | In byte mode: LSB address input (A−1); in word mode: MSB data bit (I/O15) |
| CE | Chip Enable | Primary chip select - must be low for read/write; enables bus contention avoidance |
| OE | Output Enable | Controls output drivers - low enables data output; used with CE for timing flexibility |
| WE | Write Enable | Initiates command latching and programming - rising edge triggers internal cycle start |
| BYTE | Mode Select | Logic 0 = byte mode (8-bit bus); logic 1 or open = word mode (16-bit bus) |
| RESET | Reset Input | High = normal operation; low = outputs high-Z; 12 V pulse overrides boot lockout |
| RDY/BUSY | Status Output | Open-drain active-low signal indicating ongoing program/erase - supports wired-OR multi-device monitoring |
| VPP | Optional Supply | NC by default; contact Microchip for 5 V ±10% option to reduce program/erase times |
| GND / VCC | Power Rails | Two GND pins (pins 22, 47); single VCC (pin 35) - decoupling critical for stable 120 ns reads |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector architecture | Boot block at 00000H–01FFFH (8K words) enables secure bootloader storage with lockout command sequence |
| Hardware data protection | VCC sense (<1.8 V inhibits programming), 10 ms power-on delay, and 15 ns noise filtering prevent spurious writes |
| Flexible interface modes | BYTE pin selects between 8-bit microcontroller buses (byte mode) and 16-bit processor interfaces (word mode) |
| Embedded command execution | Internal state machine handles erase/program timing - no external clocks or timing controllers required |
| Multiple completion detection | Simultaneous support for DATA polling (I/O7), TOGGLE bit (I/O6), and RDY/BUSY pin for robust system integration |
| Industrial temperature rating | Qualified from −40°C to +85°C with 50 µA standby current - suitable for unheated outdoor or factory-floor deployments |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing boot code and configuration parameters in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing immediate firmware execution on power-up; 120 ns access ensures deterministic startup timing. Use Value: Bottom-boot lockout prevents accidental corruption of safety-critical bootloader while allowing field-upgradable application firmware in main memory. | Use Scenario: Holding certified bootloader and calibration data in portable diagnostic equipment requiring regulatory-compliant firmware integrity. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA/IEC 62304–compliant boot sequences; RDY/BUSY pin synchronizes firmware updates with host MCU. Use Value: Hardware lockout + 12 V RESET override enables controlled re-certification procedures without physical rework or device replacement. |
| Telecom Base Station Configuration | Automotive Infotainment System BIOS |
Use Scenario: Retaining radio channel maps, encryption keys, and network settings in outdoor telecom nodes exposed to thermal cycling and EMI. IC Role / Device Role / Timing Role: Parameter block storage (two 4K-word sections) for mission-critical configuration data; sector-erase isolation prevents cross-contamination during updates. Use Value: 10,000-cycle endurance and −40°C to +85°C operation ensure 10+ year field life without data retention degradation. | Use Scenario: Hosting boot firmware and UI assets in automotive head units where vibration, temperature extremes, and ESD events are common. IC Role / Device Role / Timing Role: Main memory array (240K words) stores compressed OS images; BYTE pin configures interface to 8-bit automotive microcontrollers. Use Value: 2.7–3.6 V supply range tolerates automotive battery transients; 50 µA standby current extends battery backup runtime during ignition-off states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-NHE | 4 Mbit, 70 ns access, 3.0–3.6 V, top-boot architecture, no RDY/BUSY pin | Top-boot block (3E000H–3FFFFH); lacks hardware reset override for lockout | Choose for faster read timing where boot location flexibility is acceptable and RDY/BUSY is not required |
| MX29LV400CTTI-70G | 4 Mbit, 70 ns access, 2.7–3.6 V, top-boot, supports CFI query, no VPP option | CFI-compliant for auto-detection; different command set and sector map (64K/8K/8K/64K) | Choose for systems requiring standardized flash interrogation and where top-boot alignment matches existing layout |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CTTI-70G, AT49BV4096A-12RI offers bottom-boot alignment ideal for legacy x86-compatible boot ROMs, integrated RDY/BUSY signaling for simplified firmware update coordination, and a dedicated 12 V RESET override path for secure bootloader reprogramming - making it optimal for industrial and medical designs prioritizing boot integrity and debug flexibility.
Availability
AT49BV4096A-12RI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic devices, telecom base stations, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT49BV4096A-12RI 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 and maintains full technical and manufacturing continuity for the AT49BV series. The company specializes in secure, reliable microcontrollers and nonvolatile memory for industrial and automotive markets.
AT49BV4096A-12RI belongs to Atmel's legacy 3V Flash memory product line, designed specifically for embedded systems needing cost-effective, pin-compatible EPROM replacements with in-system reprogrammability and hardware-level boot protection.
FAQ
What is the boot block address range for AT49BV4096A-12RI?
The AT49BV4096A-12RI features a bottom-boot architecture with its 8K-word boot block located at address range 00000H to 01FFFH (0–8191 decimal). This fixed location enables predictable bootloader placement and simplifies memory mapping in legacy x86 and 8051-based systems. The AT49BV4096A-12RI datasheet confirms this range in the Block Diagram and Command Definitions sections.
Does AT49BV4096A-12RI support both byte and word data interfaces?
Yes, AT49BV4096A-12RI supports configurable 8-bit and 16-bit operation via the BYTE pin. When BYTE = 0, only I/O0–I/O7 are active (byte mode); when BYTE = 1 or left open, I/O0–I/O15 operate as a 16-bit bus (word mode), with I/O15 doubling as A−1 in byte mode. This dual-mode capability allows the AT49BV4096A-12RI to interface seamlessly with both 8-bit microcontrollers and 16-bit processors without external glue logic.
How is boot block programming lockout enabled and overridden on AT49BV4096A-12RI?
Boot block lockout on AT49BV4096A-12RI is enabled via a six-cycle command sequence (5555H/AAh → 2AAAH/55h → 5555H/80h → 5555H/AAh → 2AAAH/55h → 5555H/40h). Once set, the boot block (00000H–01FFFH) becomes write-protected at ≤5.5 V. Override is achieved by applying 12.0 V ±0.5 V to the RESET pin during chip/sector erase or programming - a feature explicitly documented for the AT49BV4096A-12RI in the Boot Block Programming Lockout Override section.
What completion detection methods does AT49BV4096A-12RI provide for programming and erase operations?
AT49BV4096A-12RI provides three independent completion detection methods: DATA polling (I/O7 returns complement of written data until complete), TOGGLE bit (I/O6 toggles during operation and stops when done), and RDY/BUSY pin (open-drain active-low signal). All three are fully supported in the AT49BV4096A-12RI and enable flexible firmware design - software polling for resource-constrained systems or hardware interrupt-driven handling using RDY/BUSY.
Is RDY/BUSY functionality available on all AT49BV4096A-12RI package variants?
No, RDY/BUSY functionality is only available on the 48-lead TSOP (48T) variant of AT49BV4096A-12RI (pin 12), as confirmed in the Pin Configurations diagram and Device Operation section. The 44-lead SOIC (44R) variant does not include this pin - a critical distinction for system designers selecting packages. The AT49BV4096A-12RI ordering information table explicitly lists "48T" for TSOP versions with RDY/BUSY support.
AT49BV4096A-12RI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-SOIC (0.525", 13.34mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8, 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 30µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOIC
AT49BV4096A-12RI FAQ
1.How can I place an order for AT49BV4096A-12RI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV4096A-12RI 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 AT49BV4096A-12RI reliable?
The price and inventory of AT49BV4096A-12RI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV4096A-12RI is usually 5 days.
3.What payment methods are accepted for AT49BV4096A-12RI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV4096A-12RI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV4096A-12RI?
AT49BV4096A-12RI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV4096A-12RI 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 AT49BV4096A-12RI?
For technical support, including AT49BV4096A-12RI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV4096A-12RI requirements.
6.How does Aetrix verify that AT49BV4096A-12RI is sourced from the original manufacturer or authorized distributors?
All AT49BV4096A-12RI 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 AT49BV4096A-12RI meets industry standards.
7.What is the process for return or replacement of AT49BV4096A-12RI?
All AT49BV4096A-12RI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV4096A-12RI, 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 AT49BV4096A-12RI part is unused and in its original packaging.
Return procedure for AT49BV4096A-12RI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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