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Microchip Technology AT49BV4096A-12RC
- Part No.:
- AT49BV4096A-12RC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-SOIC (0.525", 13.34mm Width)
- Datasheet:
-
AT49BV4096A-12RC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 44SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,671
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Product details
Overview
AT49BV4096A-12RC 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, 25 mA active current, and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller boot loaders and firmware update subsystems.
For engineers reviewing the AT49BV4096A-12RC datasheet, AT49BV4096A-12RC pinout, AT49BV4096A-12RC application, or AT49BV4096A-12RC equivalent, key selection criteria include boot block lockout support, byte/word mode flexibility via BYTE pin, sector erase granularity (8K/4K/240K words), RDY/BUSY signaling, and 2.7–3.6V single-supply operation for low-power embedded systems.
Technical Context
The AT49BV4096A-12RC implements a four-sector flash architecture: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 240K-word main memory array. Erase and program operations are internally controlled via command sequences written to latched address/data bus cycles without external high-voltage generators.
It supports dual data interface modes: word mode (I/O₀–I/O₁₅ active, BYTE = high/open) and byte mode (I/O₀–I/O₇ active, I/O₈–I/O₁₄ tri-stated, I/O₁₅ repurposed as A₋₁, BYTE = low). Programming uses 4-cycle command entry; sector/chip erase requires 6-cycle sequences with address-dependent sector selection (e.g., SA = 01XXX for boot block).
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 execution from flash in 20 MHz microcontroller systems |
| Supply Voltage | 2.7 V to 3.6 V - single-supply compatibility with 3.3 V logic domains and battery-backed systems |
| Active Current | 25 mA - limits thermal load in compact industrial control modules |
| Standby Current | 50 µA CMOS - supports ultra-low-power sleep modes in portable devices |
| Erase Time | 10 seconds per sector - balances speed and endurance for field firmware updates |
| Programming Time | 30 µs per byte/word - allows rapid patching of small code sections without system interruption |
| Endurance | 10,000 write/erase cycles - qualifies for 5+ years of daily firmware revision in industrial gateways |
Pinout & Package
AT49BV4096A-12RC is packaged in a 44-lead, 0.525" wide plastic gull-wing SOIC (package code 44R), compliant with JEDEC MS-013AC. Pin pitch is 1.27 mm; body width is 15.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A₀–A₁₇ | Address Inputs | 18-bit address bus supporting full 512K-byte addressing space; A₋₁ appears on I/O₁₅ in byte mode |
| CE | Chip Enable | Active-low chip select enabling memory access; must be low with OE low and WE high for read |
| OE | Output Enable | Active-low output gate controlling data bus drive; used with CE to prevent bus contention |
| WE | Write Enable | Active-low control initiating command latching, programming, or erase sequencing |
| BYTE | Interface Mode Select | Logic high = word mode (16-bit data path); logic low = byte mode (8-bit data path with A₋₁ on I/O₁₅) |
| RESET | Hardware Reset | Active-low reset halting ongoing operations; 12 V override enables boot block reprogramming |
| RDY/BUSY | Status Output | Open-drain signal pulled low during internal program/erase; supports wired-OR multi-device monitoring |
| I/O₀–I/O₇ | Data I/O (Byte Mode) | Bi-directional 8-bit data bus when BYTE = low; I/O₈–I/O₁₄ tri-stated, I/O₁₅ = A₋₁ |
| I/O₀–I/O₁₅ | Data I/O (Word Mode) | Bi-directional 16-bit data bus when BYTE = high/open; full parallel throughput for fast firmware loads |
| VCC, GND | Power Supply | Single 2.7–3.6 V supply; dual GND pins reduce ground bounce in high-speed read/write bursts |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector architecture | Boot block at 00000H–01FFFH (8K words) ensures secure bootloader storage independent of application firmware updates |
| Hardware boot block lockout | Command-enabled write protection prevents accidental corruption of critical startup code under ≤3.6 V operation |
| Internal erase/program control | No external high-voltage generator required - simplifies PCB layout and reduces BOM count in cost-sensitive designs |
| DATA polling & toggle bit | I/O₇ complement and I/O₆ toggling provide software-driven status detection without RDY/BUSY hardware dependency |
| Hardware data protection | VCC sense, 10 ms power-on delay, noise filtering (<15 ns), and control-line inhibit prevent spurious writes during power transients |
| Flexible sector erase | Independent erasure of boot block, parameter blocks, or main array enables granular firmware maintenance without full chip erase |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
|
Use Scenario: Storing certified bootloader and safety-critical initialization routines in programmable logic controllers requiring field-upgradable firmware. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic cold-start execution with hardware-protected boot block integrity. Use Value: Prevents unauthorized modification of startup code via boot lockout; 120 ns access enables real-time response in motion control loops. |
Use Scenario: Hosting FDA-compliant bootloader and diagnostic firmware in portable ultrasound and infusion pumps with regulatory traceability requirements. IC Role / Device Role / Timing Role: Secure, low-power flash storage for verified firmware images validated prior to runtime execution. Use Value: 50 µA standby current extends battery life; 10,000-cycle endurance supports multi-year device lifecycle with periodic security patches. |
| Automotive Telematics Module | Network Router Boot Image |
|
Use Scenario: Storing OTA-updatable firmware and calibration tables in vehicle infotainment and telematics control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade flash memory serving as primary boot source with sector-level update capability. Use Value: 10-second sector erase enables fast over-the-air firmware delta updates; 2.7–3.6 V range matches automotive 3.3 V rail tolerances. |
Use Scenario: Holding boot image and configuration parameters in enterprise-grade routers requiring zero-downtime firmware upgrades. IC Role / Device Role / Timing Role: Dual-mode (byte/word) flash interfacing directly with MIPS/ARM host processors for flexible memory mapping. Use Value: BYTE pin-selectable interface avoids glue logic; RDY/BUSY open-drain output supports multi-flash synchronization in redundant boot paths. |
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 configuration, no RDY/BUSY pin | Lacks hardware-ready signaling; requires software polling only; boot block at highest addresses | Select when faster read timing is critical and system software can manage polling overhead without hardware status lines |
| MX29LV400CTTI-70G | 4 Mbit, 70 ns access, 2.7–3.6 V, top-boot, includes VPP pin for accelerated programming | Top-boot orientation conflicts with AT49BV4096A-12RC's bottom-boot layout; requires PCB redesign for address mapping | Choose for legacy designs already using MXIC top-boot footprint or where VPP-assisted 5 µs programming is required |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CTTI-70G, the AT49BV4096A-12RC provides bottom-boot alignment for standard x86/ARM boot vector mapping, integrated RDY/BUSY signaling for deterministic timing, and proven 10,000-cycle endurance in extended temperature industrial deployments.
Availability
AT49BV4096A-12RC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloaders, automotive telematics modules, network router boot images, and embedded gateway firmware updates requiring stable component supply across extended temperature ranges.
Supply support for AT49BV4096A-12RC 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 of parallel-interface Flash memories.
The AT49BV4096A-12RC belongs to Atmel's legacy parallel Flash product line, designed specifically for embedded systems requiring reliable, low-voltage, sector-erasable nonvolatile storage with hardware-based boot protection and in-system reprogrammability.
FAQ
What is the boot block address range for AT49BV4096A-12RC?
The AT49BV4096A-12RC features a bottom-boot configuration with its 8K-word boot block located at address range 00000H to 01FFFH (32 KB). This fixed location enables predictable vector table placement for ARM Cortex-M and other microcontrollers requiring boot code at the lowest memory addresses. The AT49BV4096A-12RC does not support top-boot variants - that functionality is reserved for the AT49BV4096AT-12RC.
Does AT49BV4096A-12RC support both byte and word data interfaces?
Yes, the AT49BV4096A-12RC supports configurable 8-bit or 16-bit data bus operation via the BYTE pin. When BYTE = high or open, it operates in word mode with I/O₀–I/O₁₅ active. When BYTE = low, it enters byte mode: I/O₀–I/O₇ drive data while I/O₁₅ functions as the LSB address input (A₋₁), and I/O₈–I/O₁₄ are tri-stated. This dual-mode capability makes the AT49BV4096A-12RC compatible with both 8-bit and 16-bit host processors without external multiplexing.
How is hardware boot block protection enabled on AT49BV4096A-12RC?
Boot block protection on the AT49BV4096A-12RC is enabled by executing a six-cycle command sequence: write AAh to 5555H, 55h to 2AAAH, 80h to 5555H, AAh to 5555H, 55h to 2AAAH, then 40h to 5555H. Once activated, the boot block (00000H–01FFFH) becomes immune to erase or program commands under standard 2.7–3.6 V operation. The AT49BV4096A-12RC retains this lock state until power-cycled or overridden via 12 V applied to RESET during an erase/program cycle.
What signaling options does AT49BV4096A-12RC provide to detect program/erase completion?
The AT49BV4096A-12RC offers three independent methods: (1) RDY/BUSY open-drain output pulled low during internal operations; (2) DATA polling via I/O₇ complement detection; and (3) toggle bit behavior on I/O₆. Engineers may use any combination - for example, polling I/O₇ in firmware while connecting RDY/BUSY to an interrupt pin for hard real-time systems. All three mechanisms are fully supported in the AT49BV4096A-12RC and require no external components.
Is AT49BV4096A-12RC compatible with 5 V tolerant microcontrollers?
Yes - the AT49BV4096A-12RC accepts 0–5.5 V on address and control inputs (A₀–A₁₇, CE, OE, WE, RESET, BYTE) while operating from a 2.7–3.6 V VCC supply. This 5 V-tolerant input design allows direct interfacing with legacy 5 V microcontrollers without level shifters. However, I/O lines are limited to 0–(VCC + 0.6 V), so 5 V signals must not be driven onto I/O pins; the AT49BV4096A-12RC must be used in systems where data bus voltage follows VCC.
AT49BV4096A-12RC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOIC
AT49BV4096A-12RC FAQ
1.How can I place an order for AT49BV4096A-12RC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV4096A-12RC 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-12RC reliable?
The price and inventory of AT49BV4096A-12RC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV4096A-12RC is usually 5 days.
3.What payment methods are accepted for AT49BV4096A-12RC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV4096A-12RC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV4096A-12RC?
AT49BV4096A-12RC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV4096A-12RC 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-12RC?
For technical support, including AT49BV4096A-12RC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV4096A-12RC requirements.
6.How does Aetrix verify that AT49BV4096A-12RC is sourced from the original manufacturer or authorized distributors?
All AT49BV4096A-12RC 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-12RC meets industry standards.
7.What is the process for return or replacement of AT49BV4096A-12RC?
All AT49BV4096A-12RC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV4096A-12RC, 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-12RC part is unused and in its original packaging.
Return procedure for AT49BV4096A-12RC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV4096A-12RC Tags
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