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Microchip Technology AT49BV001T-90JI
- Part No.:
- AT49BV001T-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001T-90JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
AT49BV001T-90JI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 90 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It is used for firmware storage and boot code retention in industrial microcontroller systems.
For engineers reviewing the AT49BV001T-90JI datasheet, AT49BV001T-90JI pinout, AT49BV001T-90JI application, or AT49BV001T-90JI equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), boot block programming lockout with 12 V override capability, byte-programming time (30 µs typical), and PLCC-32 package compatibility with legacy embedded designs.
Technical Context
The AT49BV001T-90JI implements a command-register-based architecture requiring six-byte sequences for chip/sector erase and boot lockout enable. Its memory map places the 16 KB boot block at address range 1C000H–1FFFFH - distinct from non-T variants - and supports DATA polling (I/O7 complement) and Toggle Bit (I/O6) for program/erase cycle detection.
Hardware protection includes VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes). RESET pin enables both system reset and 12 V–triggered boot block reprogramming override, a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Read Access Time | 90 ns - determines maximum bus clock rate in 8-bit parallel interface systems |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V rails without level-shifting |
| Active Current | 25 mA - defines power budget impact during firmware reads or verification |
| Standby Current | 50 µA CMOS - supports low-power sleep modes in battery-backed applications |
| Erase Cycle Time | 10 seconds (full chip) - sets minimum firmware update latency during field upgrades |
| Write Endurance | 10,000 program/erase cycles - qualifies for long-life industrial logging or configuration storage |
Pinout & Package
AT49BV001T-90JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with standard 0.5-inch body size and gull-wing leads. Pin 1 is index corner, and pin 9 is NC (no connect) per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper memory regions including boot block (1C000H–1FFFFH) |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; I/O7 used for DATA polling, I/O6 for Toggle Bit status monitoring |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access |
| OE | Output Enable | Active-low output control; enables tristate output drivers to prevent bus contention |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing |
| RESET | Reset / Boot Override | Logic-high = normal operation; 12 V pulse enables boot block reprogramming even when lockout is active |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage regulation ensures stable core operation across range |
| GND | Ground | Reference return path for all signals and power; requires low-impedance PCB plane |
| NC | No Connect | Pin 9 - must remain unconnected; floating or driven states may cause undefined behavior |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB region (1C000H–1FFFFH) permanently protected after enable command; prevents accidental overwrite of critical startup code |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin during erase/program restores boot block writability - essential for field recovery |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) enables modular firmware updates |
| DATA Polling & Toggle Bit | Dual asynchronous end-of-cycle detection methods eliminate need for fixed timing delays in host firmware |
| Hardware Write Inhibit | VCC sense, noise filtering, and multi-control-line gating prevent spurious writes during power transients or EMI events |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing bootloader and safety-critical initialization routines in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup sequence execution upon cold power-up or watchdog reset. Use Value: Boot block lockout ensures firmware integrity across 10,000+ field updates; 90 ns access enables fast instruction fetch during real-time control loops. | Use Scenario: Holding certified diagnostic firmware and calibration tables in portable ultrasound or infusion pump systems requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store with verified write endurance and industrial temperature operation. Use Value: 50 µA standby current extends battery life between recalibrations; 12 V RESET override allows authorized service personnel to restore corrupted boot sectors. |
| Telecom Base Station Configuration | Automotive Body Control Module (BCM) |
Use Scenario: Storing radio parameter sets and network authentication keys in outdoor LTE small cells exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Field-upgradable parameter memory supporting over-the-air (OTA) configuration changes without hardware replacement. Use Value: Sector-erase capability isolates parameter updates from main firmware; −40°C to +85°C rating ensures reliability in uncontrolled enclosures. | Use Scenario: Hosting vehicle-specific CAN message routing tables and lighting control logic in automotive BCMs subject to AEC-Q100 stress screening. IC Role / Device Role / Timing Role: Reprogrammable nonvolatile memory interfaced directly to 8-bit MCU buses for low-latency configuration access. Use Value: Hardware data protection prevents corruption during load-dump events; PLCC-32 package supports automated optical inspection in high-reliability assembly lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90PI | Same die, PDIP-32 package instead of PLCC-32; no NC pin (pin 9 functional as A15) | Through-hole assembly only; lacks gull-wing thermal/mechanical advantages of PLCC | Select for prototyping or low-volume hand-soldered boards where PLCC rework is impractical |
| SST39VF010-90-4C-NHE | 1 Mbit Flash with 90 ns access, but uses different command set and lacks 12 V RESET override | No boot block lockout override mechanism; requires full chip erase to recover locked sectors | Choose only if migrating legacy SST39VF designs; verify command sequence compatibility and absence of 12 V recovery requirement |
Compared with AT49BV001T-90PI and SST39VF010-90-4C-NHE, the AT49BV001T-90JI uniquely combines industrial temperature rating, PLCC-32 mechanical robustness, and 12 V–enabled boot recovery - making it irreplaceable in field-deployed systems requiring guaranteed firmware resilience.
Availability
AT49BV001T-90JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and telecom base station configuration requiring stable component supply across extended lifecycle commitments.
Supply support for AT49BV001T-90JI 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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial and automotive markets.
The AT49BV/LV001(N)(T) family was designed specifically for in-system reprogrammable firmware storage in resource-constrained 8-bit embedded systems, emphasizing boot integrity, sector-level flexibility, and robustness against electrical disturbances.
FAQ
What is the boot block address range for AT49BV001T-90JI?
The boot block for AT49BV001T-90JI occupies address range 1C000H to 1FFFFH (16 KB), distinct from non-T variants that use 00000H–03FFFH. This relocation enables separation of boot code from application firmware in larger memory maps and is confirmed in the device's sector address table and block diagram.
Does AT49BV001T-90JI support 12 V programming override?
Yes, AT49BV001T-90JI supports 12 V ±0.5 V applied to the RESET pin during chip/sector erase or byte programming to temporarily disable boot block lockout. This feature is explicitly documented in the Boot Block Programming Lockout Override section and is not available on N-suffix variants like AT49BV001N(T).
What package type is used by AT49BV001T-90JI?
AT49BV001T-90JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as 32J in Atmel's ordering information. Pin 9 is NC (no connect), and the package complies with JEDEC MS-026 standards for surface-mount reliability and thermal performance.
How does AT49BV001T-90JI detect end-of-program cycle?
AT49BV001T-90JI provides two hardware-supported methods: DATA polling (reading last programmed byte returns complement on I/O7 until completion) and Toggle Bit (I/O6 toggles during operation and stabilizes upon finish). Both are usable concurrently and require no external timing components.
Is AT49BV001T-90JI compatible with standard EPROM socket interfaces?
Yes, AT49BV001T-90JI uses standard CE/OE/WE control signals and operates in read mode identically to EPROMs, enabling drop-in replacement in existing 27C010-compatible sockets - provided VCC is 2.7–3.6 V and RESET is pulled high. No address/data bus changes are needed.
AT49BV001T-90JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV001T-90JI FAQ
1.How can I place an order for AT49BV001T-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001T-90JI 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 AT49BV001T-90JI reliable?
The price and inventory of AT49BV001T-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001T-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV001T-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001T-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001T-90JI?
AT49BV001T-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001T-90JI 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 AT49BV001T-90JI?
For technical support, including AT49BV001T-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001T-90JI requirements.
6.How does Aetrix verify that AT49BV001T-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001T-90JI 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 AT49BV001T-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV001T-90JI?
All AT49BV001T-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001T-90JI, 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 AT49BV001T-90JI part is unused and in its original packaging.
Return procedure for AT49BV001T-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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