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Microchip Technology AT49BV4096A-70TI
- Part No.:
- AT49BV4096A-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV4096A-70TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,031
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Product details
Overview
AT49BV4096A-70TI from Atmel is a 4-Mbit (524,288 × 8 or 256K × 16) single-voltage Flash memory IC with 70 ns read access time, 2.7–3.6 V operation, sector-erase architecture (boot + parameter + main blocks), and hardware data protection. It serves as nonvolatile program/data storage in embedded boot loaders, firmware update modules, and industrial controller BIOS.
For engineers reviewing the AT49BV4096A-70TI datasheet, AT49BV4096A-70TI pinout, AT49BV4096A-70TI application, or AT49BV4096A-70TI equivalent, this page delivers verified timing, sector protection behavior, byte/word mode control, RESET-based boot lock override, and TSOP-48 package compatibility for legacy 3.3 V system designs.
Technical Context
The AT49BV4096A-70TI implements a CMOS-based NOR Flash architecture with internal erase/program state machines, supporting chip-erase (10 s max) and sector-erase (10 s typical) via six-cycle command sequences. Its boot block (00000H–01FFFH) features programmable lockout enabled by a 6-byte command sequence.
Operation relies on standard EPROM-like control signals (CE/OE/WE), with BYTE pin selection between 16-bit word mode (I/O0–I/O15 active) and 8-bit byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1). RESET pin supports both TTL-level reset and 12 V override of boot lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8 or 256K × 16), enabling full BIOS or bootloader storage in compact footprint |
| Read Access Time | 70 ns at 2.7–3.6 V, meeting real-time boot latency requirements for microcontroller host systems |
| Supply Voltage | 2.7 V to 3.6 V single supply, compatible with battery-backed or low-noise 3.3 V rails without level shifters |
| Erase Time | 10 seconds typical for sector or chip erase, enabling field firmware updates within defined maintenance windows |
| Programming Time | 30 µs per byte/word, supporting efficient in-system reprogramming during production or service |
| Standby Current | 50 µA CMOS standby, minimizing power draw in always-on embedded control applications |
| Endurance | 10,000 write/erase cycles, sufficient for firmware revision management over product lifetime |
Pinout & Package
AT49BV4096A-70TI is packaged in a 48-lead Plastic Thin Small Outline Package (TSOP Type I, 12 × 20 mm), compliant with JEDEC MO-142 DD. Pin 1 identifier is marked with a notch or dot; package height ≤ 1.20 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 524,288-word addressing; A−1 function on I/O15 in byte mode |
| CE | Chip Enable | Active-low chip select; enables device output drivers only when OE is also low and WE high during read |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention in shared-data-bus systems |
| WE | Write Enable | Active-low write strobe; initiates command latching and programming/erase cycles when CE low and OE high |
| RESET | Reset Input | TTL-level reset (VIL/VIH) halts operations; 12 V ±0.5 V input overrides boot block lockout |
| BYTE | Bus Width Select | Logic high or open = 16-bit word mode (I/O0–I/O15); logic low = 8-bit byte mode (I/O0–I/O7 active) |
| I/O0–I/O15 | Data I/O | Bidirectional data bus; I/O15 functions as LSB address (A−1) in byte mode |
| VPP | Programming Voltage | No-connect pin; no external voltage required-device uses internal charge pump for all programming |
| NC | No Connect | Unbonded pins (e.g., ball A1 in CBGA variants); must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 8K-word (00000H–01FFFH) region protected via 6-byte command; prevents accidental overwrite of secure boot code |
| Data Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, software-driven confirmation of program/erase completion without polling timers |
| Hardware Data Protection | VCC sense (<1.8 V inhibit), 10 ms power-on delay, noise filtering (<15 ns pulses ignored), and control-line gating prevent spurious writes |
| Sector Erase Architecture | Four independent sectors (1× boot, 2× parameter, 1× main) enable selective firmware updates without full chip erase |
| Single 2.7–3.6 V Operation | Eliminates need for 5 V or 12 V programming supplies-reduces BOM count and simplifies power design |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing certified boot firmware and configuration parameters in Class II medical diagnostic equipment requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 70 ns read access to initialize ARM Cortex-M4 host processor during cold start. Use Value: Boot block lockout ensures FDA-regulated startup code remains unaltered across 10,000 field updates; sector erase allows safe parameter revision without risking boot integrity. |
Use Scenario: Holding upgradeable application firmware in portable ultrasound controllers where battery life and firmware security are critical. IC Role / Device Role / Timing Role: Field-updatable Flash memory operating from 3.3 V rail, interfaced via parallel bus to microcontroller with CE/OE/WE handshaking. Use Value: 50 µA standby current extends battery runtime; RESET-pin 12 V override enables secure recovery of corrupted boot sectors during service. |
| Automotive ECU Calibration Data | Networking Equipment BIOS |
Use Scenario: Storing engine calibration maps and diagnostic logs in Tier-1 automotive ECUs operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade Flash memory delivering guaranteed 70 ns read timing under temperature extremes for real-time sensor data lookup. Use Value: Parameter block architecture isolates calibration tables (4K-word blocks) from main firmware, enabling independent OTA updates without full reflash. |
Use Scenario: Hosting BIOS and UEFI firmware in enterprise switches/routers requiring secure, field-reprogrammable boot media. IC Role / Device Role / Timing Role: Parallel-interface Flash IC acting as primary boot source for x86 host processors, accessed via standard memory-mapped I/O. Use Value: Hardware data protection and command-sequence validation prevent unauthorized firmware modification; TSOP-48 footprint ensures compatibility with legacy server motherboard layouts. |
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, 3.0–3.6 V; lacks boot block lockout and RESET-based override; uses different command set | Requires modified firmware driver for erase/write; no hardware-protected boot region | Choose when boot security is not required and existing SST39VF driver stack is already deployed. |
| MX29LV400CBTI-70G | 4 Mbit, 70 ns, 3.0–3.6 V; top-boot configuration (boot block at highest addresses); identical sector sizes but inverted layout | Requires PCB address mapping changes; boot code must be relocated to upper 8K-word region | Choose only if board layout accommodates top-boot address remapping and firmware supports alternate sector addressing. |
Compared with SST39VF400A-70-4C-EKE and MX29LV400CBTI-70G, the AT49BV4096A-70TI uniquely provides bottom-boot lockout with 12 V RESET override, making it irreplaceable in safety-critical boot applications where firmware integrity verification and field recovery are mandatory.
Availability
AT49BV4096A-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloaders, and automotive ECU calibration data requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV4096A-70TI 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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for embedded systems.
The AT49BV/LV4096A product line delivers single-supply, sector-erasable Flash memory optimized for reliable in-system reprogramming in resource-constrained industrial, medical, and automotive control applications.
FAQ
What is the operating voltage range for the AT49BV4096A-70TI?
The AT49BV4096A-70TI operates from 2.7 V to 3.6 V DC. This single-supply range eliminates the need for auxiliary 5 V or 12 V programming voltages, simplifying power design in battery-powered or low-noise 3.3 V systems. The device incorporates VCC sense circuitry that inhibits programming if VCC drops below ~1.8 V, ensuring data integrity during brownout conditions. AT49BV4096A-70TI maintains full 70 ns read access and 30 µs programming performance across this entire voltage window.
How does the boot block programming lockout work on the AT49BV4096A-70TI?
The AT49BV4096A-70TI's boot block lockout protects the 8K-word region (00000H–01FFFH) using a 6-byte command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once enabled, no programming or erasure is possible with ≤5.5 V inputs. AT49BV4096A-70TI retains this lockout state until power-cycled, and lock status can be verified by reading bit I/O0 at address 00002h in software identification mode.
Can the AT49BV4096A-70TI be used in both 8-bit and 16-bit data bus configurations?
Yes-the AT49BV4096A-70TI supports both modes via the BYTE pin. When BYTE = high or open, it operates in 16-bit word mode with I/O0–I/O15 active; when BYTE = low, it enters 8-bit byte mode with only I/O0–I/O7 active and I/O15 repurposed as address bit A−1. This flexibility allows AT49BV4096A-70TI to interface directly with 8-bit microcontrollers (e.g., 8051 derivatives) or 16-bit hosts (e.g., Intel 80C188) without external glue logic.
What is the purpose of the RESET pin on the AT49BV4096A-70TI beyond standard reset functionality?
On the AT49BV4096A-70TI, the RESET pin serves dual roles: TTL-level reset (VIL/VIH) halts ongoing operations and places outputs in high-impedance state, while a 12 V ±0.5 V signal applied to RESET overrides the boot block programming lockout during chip/sector erase or word programming. This feature enables secure field recovery of corrupted boot code without requiring specialized programmers. AT49BV4096A-70TI returns to normal lockout behavior once RESET is restored to TTL levels.
How is end-of-program detection implemented in the AT49BV4096A-70TI?
The AT49BV4096A-70TI provides two hardware-supported methods: Data Polling (I/O7 returns complement of last written data until completion, then true data) and Toggle Bit (I/O6 toggles between 0/1 during operation, then stabilizes). Both methods allow host software to poll asynchronously without fixed delays. AT49BV4096A-70TI guarantees these signals reflect actual internal state-not just command acceptance-enabling robust, timing-independent firmware update routines.
AT49BV4096A-70TI 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:
- 70 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-70TI FAQ
1.How can I place an order for AT49BV4096A-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV4096A-70TI 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-70TI reliable?
The price and inventory of AT49BV4096A-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV4096A-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV4096A-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV4096A-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV4096A-70TI?
AT49BV4096A-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV4096A-70TI 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-70TI?
For technical support, including AT49BV4096A-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV4096A-70TI requirements.
6.How does Aetrix verify that AT49BV4096A-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV4096A-70TI 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-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV4096A-70TI?
All AT49BV4096A-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV4096A-70TI, 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-70TI part is unused and in its original packaging.
Return procedure for AT49BV4096A-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV4096A-70TI Tags
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