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Microchip Technology AT49BV4096A-12TI
- Part No.:
- AT49BV4096A-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV4096A-12TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV4096A-12TI from Microchip Technology (formerly Atmel) is a 4-Mbit (512K × 8 / 256K × 16) bottom-boot CMOS Flash memory IC used for nonvolatile program storage in embedded microcontroller systems. It operates from 2.7V to 3.6V, delivers 120 ns read access time, supports byte/word programming (30 µs typical), features hardware data protection, and includes a programmable 8K-word boot block with lockout capability. It is commonly deployed in industrial firmware storage applications requiring in-system reprogrammability.
For engineers reviewing the AT49BV4096A-12TI datasheet, AT49BV4096A-12TI pinout, AT49BV4096A-12TI application, or AT49BV4096A-12TI equivalent, key selection considerations include its bottom-boot sector architecture, TSOP-48 or SOIC-44 package variants, 10,000 write/erase cycle endurance, RDY/BUSY signaling support (via dedicated pin on TSOP variant), and VPP-assisted fast programming capability.
Technical Context
The AT49BV4096A-12TI implements a sector-erased Flash architecture with four distinct memory blocks: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 240K-word main memory array. Erase operations are internally controlled via command sequences - chip erase (6-byte sequence) or sector erase (6-cycle with address latch) - eliminating need for external timing control.
It supports dual data bus configurations: word mode (I/O₀–I/O₁₅ active when BYTE = high/open) and byte mode (I/O₀–I/O₇ active, I/O₁₅ repurposed as A₋₁ LSB address input when BYTE = low). Programming uses embedded algorithms with DATA polling (I/O₇ complement) and toggle-bit (I/O₆) status detection, and hardware protections include VCC sense, noise filtering (<15 ns pulse rejection), and CE/OE/WE inhibit logic.
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 20–25 MHz microcontroller systems |
| Supply Voltage Range | 2.7V to 3.6V - compatible with 3.3V logic domains without level shifting |
| Active Current | 25 mA - determines power budget impact during firmware reads or verification |
| Standby Current | 50 µA CMOS - supports low-power sleep modes in battery-backed systems |
| Erase Cycle Time | 10 seconds per sector - defines minimum firmware update latency for field upgrades |
| Programming Time | 30 µs per byte/word - sets throughput limit for in-system programming routines |
| Endurance | 10,000 write/erase cycles - specifies maximum field firmware revision count before wear-out |
Pinout & Package
AT49BV4096A-12TI is available in 48-lead TSOP (Type 1, 48T) package per JEDEC MO-142 D outline. Pin functions are validated per official Atmel Rev. 1139A–09/98 documentation and match the TSOP top-view layout shown in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A₀–A₁₈ | Address Inputs | 19-bit address bus supporting full 512K-byte addressing space |
| CE | Chip Enable | Primary device select; must be low for read/write; enables bus contention avoidance |
| OE | Output Enable | Controls output drivers only; allows CE to remain asserted during data sampling |
| WE | Write Enable | Initiates command latching and programming/erase cycles; edge-sensitive timing |
| BYTE | Bus Width Select | Logic high = 16-bit word mode (I/O₀–I/O₁₅); logic low = 8-bit byte mode (I/O₀–I/O₇ + A₋₁) |
| RESET | Hardware Reset | Forces outputs to high-Z; 12V override enables boot block reprogramming under lockout |
| RDY/BUSY | Status Output | Open-drain signal pulled low during internal program/erase; supports multi-device OR-tying |
| I/O₀–I/O₁₄ | Data I/O (bidirectional) | Core data path; I/O₁₅ serves dual role as data bit or A₋₁ address LSB depending on BYTE state |
| VPP | Optional Programming Supply | NC by default; optional 5V ±10% supply to reduce program/erase times (contact Microchip) |
| GND / VCC | Power Rails | Two GND pins (pins 23 & 47) and one VCC (pin 32) ensure stable core voltage delivery |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector architecture | Boot block at 00000H–01FFFH (8K words) enables secure bootloader storage with independent lockout control |
| Hardware data protection | VCC sense, 10 ms power-on delay, noise filtering, and CE/OE/WE inhibit prevent accidental writes during power transients |
| Embedded erase/program control | No external high-voltage generator required; all timing and voltage sequencing handled internally |
| DATA polling & toggle-bit status | I/O₇ complement and I/O₆ toggling provide software-driven, cycle-accurate completion detection without RDY/BUSY pin dependency |
| Flexible bus interface | BYTE pin-selectable 8-bit or 16-bit data width simplifies integration with diverse MCU data buses |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing immutable bootloader code and field-upgradable application firmware in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing immediate code execution on power-up and safe in-system reprogramming of application partitions. Use Value: Bottom-boot architecture isolates bootloader from accidental overwrite; 10,000-cycle endurance supports >5 years of scheduled firmware updates at quarterly intervals. | Use Scenario: Holding certified bootloader and diagnostic firmware in Class II medical instruments requiring traceable, tamper-resistant storage with long-term data retention. IC Role / Device Role / Timing Role: Secure, lockable firmware repository ensuring boot integrity and enabling regulatory-compliant over-the-air updates. Use Value: Boot block programming lockout prevents unauthorized modification; 50 µA standby current extends battery life in portable diagnostic tools during idle periods. |
| Automotive Body Control Module (BCM) | Telecom Remote Node Configuration |
Use Scenario: Storing calibration tables, feature enable bits, and vehicle-specific configuration data in BCMs exposed to extended temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-stable parameter memory supporting EEPROM-like functionality with higher density and faster write throughput. Use Value: Industrial-grade temperature rating (AT49BV4096A-12TI) ensures reliable operation across automotive thermal cycles; sector erase enables selective parameter updates without full memory rewrite. | Use Scenario: Hosting firmware images and network configuration profiles in remote telecom nodes where physical access is limited and remote updates are critical. IC Role / Device Role / Timing Role: Field-programmable storage enabling zero-touch firmware deployment via serial or Ethernet interfaces. Use Value: RDY/BUSY pin allows host processor to offload erase timing; 120 ns access time supports real-time configuration loading during node boot. |
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-EKE | 4 Mbit, 70 ns access, 3.0–3.6V supply, top-boot configuration, no RDY/BUSY pin | Lacks bottom-boot alignment and hardware status pin; requires software polling only | Select when faster read speed is prioritized over boot block location control and hardware status signaling |
| MX29LV400CTTC-70G | 4 Mbit, 70 ns access, 3.0–3.6V, top-boot, includes RDY/BUSY but different command set and sector map | Top-boot orientation conflicts with AT49BV4096A-12TI's bottom-boot firmware layout; not drop-in replaceable | Choose only after full firmware partition remapping and command sequence validation |
Compared with SST39VF400A-70-4C-EKE and MX29LV400CTTC-70G, the AT49BV4096A-12TI offers deterministic bottom-boot addressing for legacy bootloader compatibility, integrated hardware data protection logic, and dual-mode (byte/word) flexibility - making it preferable for industrial designs requiring field-proven, pin-defined boot security and robust in-system reprogrammability.
Availability
AT49BV4096A-12TI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV4096A-12TI 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 supply chain support for the AT49BV4096A-12TI and related Flash memory portfolio.
The AT49BV4096A-12TI belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring simple microcontroller bus interfacing and secure firmware storage.
FAQ
What is the boot block address range for AT49BV4096A-12TI?
The AT49BV4096A-12TI implements a bottom-boot architecture with its 8K-word boot block located at address range 00000H to 01FFFH (32 KB). This fixed mapping ensures bootloader code resides at the lowest memory addresses, enabling direct CPU vector fetch on reset. The AT49BV4096A-12TI's boot block is distinct from top-boot variants like AT49BV4096AT, which places the boot block at 3E000H–3FFFFH.
Does AT49BV4096A-12TI support both 8-bit and 16-bit data bus interfaces?
Yes, the AT49BV4096A-12TI supports configurable bus width via the BYTE pin: when pulled high or left open, it operates in 16-bit word mode with I/O₀–I/O₁₅ active; when pulled low, it switches to 8-bit byte mode with I/O₀–I/O₇ active and I/O₁₅ repurposed as the A₋₁ LSB address input. This dual-mode capability allows seamless integration with both 8-bit and 16-bit microcontrollers without external glue logic.
How is boot block programming lockout enabled on AT49BV4096A-12TI?
Boot block programming lockout on the AT49BV4096A-12TI is enabled via a six-cycle command sequence: load AAH to address 5555H, 55H to 2AAAH, then 80H to 5555H, followed by AAH/55H again, and finally 40H to 5555H. Once activated, the boot block (00000H–01FFFH) becomes write-protected under standard 3.6V operation. The AT49BV4096A-12TI retains this lockout state until explicitly overridden using 12V on the RESET pin.
What status signaling methods does AT49BV4096A-12TI provide during programming or erase?
The AT49BV4096A-12TI provides three concurrent status signaling methods: (1) RDY/BUSY pin (open-drain, active-low), (2) DATA polling via I/O₇ complement detection, and (3) toggle-bit monitoring on I/O₆. These allow flexible host-side timing management - hardware interrupt (RDY/BUSY), polling loop (DATA), or mixed-mode use - without requiring external timers. All three methods are fully supported in the AT49BV4096A-12TI's command-set architecture.
Is VPP required for normal operation of AT49BV4096A-12TI?
No, VPP is optional and not required for standard operation of the AT49BV4096A-12TI. The device functions fully at 2.7V–3.6V VCC alone. VPP (5V ±10%) is an auxiliary supply pin that may be used to accelerate program and erase times, but it is NC (no-connect) by default. If VPP support is needed, users must contact Microchip for availability and implementation guidance - the AT49BV4096A-12TI's standard configuration operates without VPP.
AT49BV4096A-12TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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:
- 48-TSOP
AT49BV4096A-12TI FAQ
1.How can I place an order for AT49BV4096A-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV4096A-12TI 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-12TI reliable?
The price and inventory of AT49BV4096A-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV4096A-12TI is usually 5 days.
3.What payment methods are accepted for AT49BV4096A-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV4096A-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV4096A-12TI?
AT49BV4096A-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV4096A-12TI 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-12TI?
For technical support, including AT49BV4096A-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV4096A-12TI requirements.
6.How does Aetrix verify that AT49BV4096A-12TI is sourced from the original manufacturer or authorized distributors?
All AT49BV4096A-12TI 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-12TI meets industry standards.
7.What is the process for return or replacement of AT49BV4096A-12TI?
All AT49BV4096A-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV4096A-12TI, 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-12TI part is unused and in its original packaging.
Return procedure for AT49BV4096A-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV4096A-12TI Tags
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