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Microchip Technology AT49BV001T-90JC
- Part No.:
- AT49BV001T-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001T-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,420
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Product details
Overview
AT49BV001T-90JC from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V Flash memory IC 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 supports in-system reprogramming for embedded firmware storage in microcontroller-based industrial controllers.
For engineers reviewing the AT49BV001T-90JC datasheet, AT49BV001T-90JC pinout, AT49BV001T-90JC application, or AT49BV001T-90JC equivalent, key selection considerations include its PLCC-32 package, boot block lockout override via 12 V RESET, DATA polling/Toggle Bit erase/program status detection, and compatibility with standard EPROM-like CE/OE/WE bus interface timing.
Technical Context
The AT49BV001T-90JC implements a command-register-based architecture requiring six-byte software 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 - enabling secure bootloader storage separate from application code.
It features dual-line control (CE + OE) for bus contention avoidance, internal program timer and erase controller, and hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and write-inhibit logic (OE low, CE high, or WE high blocks writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for compact firmware images and configuration data. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V systems without level-shifting or external regulators. |
| Active Current | 25 mA typical - supports low-power operation during active reads in battery-backed or energy-constrained designs. |
| Standby Current | 50 µA CMOS - minimizes quiescent power in always-on embedded controllers. |
| Erase Time | 10 seconds max for full chip - enables field firmware updates with predictable timeout handling. |
| Program End Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
Pinout & Package
AT49BV001T-90JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, compatible with standard PLCC sockets and reflow profiles. Pin 1 is marked by notch orientation; pins 1 and 32 are NC/DC per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 used only for addresses ≥128K (e.g., boot block at 1C000H). |
| I/O0–I/O7 | Data Input/Output | Bi-directional 8-bit data bus; supports byte-wide programming and read operations with true TTL-compatible levels. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - enables multi-device bus sharing. |
| OE | Output Enable | Active-low output control; used with CE to gate data outputs and prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing - critical for reliable command entry. |
| RESET* | Reset Input | Active-low reset; applying 12 V ±0.5 V overrides boot block lockout - unique to T-suffix devices for secure recovery. |
| VCC | Power Supply | 2.7–3.6 V supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground | Reference return path for all I/O and internal circuitry; requires low-impedance PCB plane for noise immunity. |
| NC/DC | No Connect / Don't Connect | Pins 1 and 32 are unconnected - must remain floating; no pull-up/down or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout Override | 12 V applied to RESET pin enables reprogramming of locked 16 KB boot sector - critical for field recovery of corrupted bootloader. |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) - allows selective firmware update without full chip erase. |
| Hardware Data Protection | VCC sense, noise filtering, and triple-input write inhibit (CE/OE/WE logic) prevent accidental writes during power transients or EMI events. |
| Standard EPROM Interface | CE/OE/WE control and output timing identical to industry-standard EPROMs - enables drop-in replacement in legacy designs with minimal firmware changes. |
| Software Product Identification | Manufacturer code 1FH and device code 04H readable via software command - enables automatic device detection in universal programmers. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with 90 ns read access enabling real-time instruction fetch for deterministic scan-cycle execution. Use Value: Boot block lockout prevents unauthorized modification of safety-critical startup routines while allowing field updates to application logic in main memory blocks. | Use Scenario: Securing boot code in portable diagnostic equipment requiring FDA-compliant firmware integrity and traceable update history. IC Role / Device Role / Timing Role: Trusted bootloader storage with hardware-enforced write protection and 12 V RESET override for certified recovery procedures. Use Value: Enables auditable firmware updates where boot sector immutability is mandated, while maintaining flexibility for parameter block updates (e.g., sensor calibration offsets). |
| Telecom Edge Node Configuration | Automotive Body Control Module |
Use Scenario: Holding configuration data and protocol stacks in remote radio units exposed to thermal cycling and electrical noise. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) for network-specific settings and firmware patches, accessed via standard microprocessor bus. Use Value: Sector-level erase allows independent update of protocol parameters without disturbing operational firmware in main memory blocks. | Use Scenario: Storing vehicle-specific calibration maps and CAN message definitions in body control modules operating across -40°C to +85°C. IC Role / Device Role / Timing Role: EEPROM-replacement for infrequently updated but mission-critical data, leveraging 10,000 write cycles and low standby current (50 µA). Use Value: Eliminates need for external EEPROM while meeting automotive AEC-Q100 reliability requirements through robust hardware write protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90JI | Same die and command set, but rated for -40°C to +85°C industrial temperature range and packaged in PLCC-32 with different marking. | Required for extended-temperature deployments (e.g., outdoor telecom, engine bay electronics); otherwise functionally identical. | Select AT49BV001T-90JI when operating ambient exceeds 70°C or automotive/industrial qualification is mandatory. |
| AT49LV001T-90JC | Narrower VCC range (3.0–3.6 V vs. 2.7–3.6 V); identical pinout, timing, and sector architecture; shares same PLCC-32 package. | Not suitable for battery-powered systems where supply may dip below 3.0 V; otherwise interchangeable in regulated 3.3 V rails. | Choose AT49LV001T-90JC only in stable 3.3 V environments where lowest possible active current (20 mA typ.) is prioritized over voltage flexibility. |
Compared with AT49BV001T-90JI, the AT49BV001T-90JC offers lower cost and commercial-temperature suitability, while AT49LV001T-90JC trades voltage margin for slightly reduced active current - making the original part optimal for 2.7–3.6 V battery-backed or mixed-voltage industrial systems.
Availability
AT49BV001T-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader, telecom edge node configuration, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV001T-90JC 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/LV series was designed as pin-compatible, single-supply Flash memory replacements for EPROMs in legacy and new industrial designs - emphasizing in-system reprogrammability, sector protection, and robust command-set reliability.
FAQ
What is the boot block address range for AT49BV001T-90JC?
The AT49BV001T-90JC locates its 16 KB boot block at address range 1C000H to 1FFFFH - distinct from non-T variants (which use 00000H–03FFFH). This offset enables separation of bootloader code from application firmware in larger memory maps, and is confirmed in the device's sector erase command table and block diagram. The AT49BV001T-90JC's boot block lockout feature applies exclusively to this region.
Does AT49BV001T-90JC support 12 V RESET for boot block override?
Yes, AT49BV001T-90JC supports 12 V ±0.5 V applied to the RESET pin to override enabled boot block lockout during chip erase, sector erase, or byte programming - a feature explicitly documented for the "T" suffix variant and absent in "N" variants. This capability is critical for secure field recovery and is electrically validated per Absolute Maximum Ratings (RESET pin tolerates up to +13.5 V).
What package type is used for AT49BV001T-90JC?
AT49BV001T-90JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's ordering guide. Pin 1 is identified by the package notch; pins 1 and 32 are NC/DC and must remain unconnected. This surface-mount package supports socketed prototyping and reflow assembly, with thermal and mechanical characteristics validated for commercial-temperature operation (0°C to 70°C).
How does AT49BV001T-90JC detect end-of-program without polling?
AT49BV001T-90JC provides Toggle Bit detection on I/O6: during programming or erase, successive reads of any fixed address cause I/O6 to toggle between 0 and 1; cessation of toggling indicates completion. This method avoids bus contention and eliminates dependency on specific data values, unlike DATA polling (I/O7 complement). Both mechanisms are fully supported and characterized in the AC timing specifications.
Is AT49BV001T-90JC compatible with standard EPROM timing and interface?
Yes, AT49BV001T-90JC uses identical CE/OE/WE control logic and timing windows as standard EPROMs - including tACC = 90 ns, tCE = 90 ns, and tOE ≤ 40 ns - enabling direct replacement in existing 8-bit microprocessor buses without logic redesign. Its output drive strength (IOH = –400 µA, IOL = 2.1 mA) and voltage thresholds (VIH = 2.0 V, VIL = 0.6 V) comply with TTL/CMOS interface standards.
AT49BV001T-90JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV001T-90JC FAQ
1.How can I place an order for AT49BV001T-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001T-90JC 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-90JC reliable?
The price and inventory of AT49BV001T-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001T-90JC is usually 5 days.
3.What payment methods are accepted for AT49BV001T-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001T-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001T-90JC?
AT49BV001T-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001T-90JC 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-90JC?
For technical support, including AT49BV001T-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001T-90JC requirements.
6.How does Aetrix verify that AT49BV001T-90JC is sourced from the original manufacturer or authorized distributors?
All AT49BV001T-90JC 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-90JC meets industry standards.
7.What is the process for return or replacement of AT49BV001T-90JC?
All AT49BV001T-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001T-90JC, 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-90JC part is unused and in its original packaging.
Return procedure for AT49BV001T-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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