My Inquiry
My Account
Microchip Technology AT49BV002-90JC
- Part No.:
- AT49BV002-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002-90JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,586
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV002-90JC from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) single-supply 3V-only Flash memory IC designed for in-system reprogrammability in embedded boot code storage. It features 70 ns read access time, 10-second chip erase, byte-programming at 30 µs/byte, hardware data protection, and sector architecture with 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (96K/128K bytes). It is used in microcontroller-based systems requiring secure, field-upgradable firmware storage.
For engineers reviewing the AT49BV002-90JC datasheet, AT49BV002-90JC pinout, AT49BV002-90JC application, or AT49BV002-90JC equivalent, key selection considerations include its PLCC-32 package, 2.7–3.6V VCC operation, boot block lockout capability, DATA polling/Toggle Bit end-of-write detection, and compatibility with standard EPROM-like bus interface (CE/OE/WE control).
Technical Context
The AT49BV002-90JC implements a CMOS-based NOR Flash architecture with internal program control logic and autonomous erase timing. Its sector organization enables selective erasure of boot, parameter, or main memory blocks via six-cycle command sequences without external clocks.
It supports standard microprocessor write timings and uses address/data latching on falling/rising edges of CE or WE. The RESET pin provides system-level operational halt and-when driven to 12V-overrides boot block lockout for reprogramming, a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 8-bit microcontroller data buses without glue logic. |
| Read Access Time | 90 ns max - ensures compatibility with 10 MHz bus timing in legacy 8-bit MCU systems. |
| Supply Voltage | 2.7 V to 3.6 V - supports battery-powered and low-voltage industrial applications without level-shifting. |
| Byte Programming Time | 30 µs typical - enables rapid field updates of small firmware patches without long downtime. |
| Erase Cycle Time | 10 seconds max for full chip erase - predictable, self-timed operation eliminates need for external erase controllers. |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - allows software-driven status monitoring without polling overhead or dedicated status pins. |
| Write Endurance | 10,000 program/erase cycles - validated for frequent firmware update scenarios in industrial control and instrumentation. |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in always-on embedded systems. |
Pinout & Package
AT49BV002-90JC is housed in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, compliant with JEDEC MS-026. Pin 1 is index corner, and pin 32 is VCC. Pin 1 is a DC (do not connect) pin per datasheet Rev. 0982D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for byte-level access, A17 selects upper/lower half in extended modes. |
| 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; decouples device outputs from bus during inactive cycles to prevent contention. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edge depending on CE state - implements standard microprocessor write protocol. |
| RESET* | Reset Input | Active-low operational halt; 12V input enables boot block override - critical for secure recovery in locked firmware deployments. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; supports both read (output) and program (input) functions - eliminates need for separate data/address multiplexing. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and I/O buffers - compatible with 3.3V LDOs and battery stacks. |
| GND | Ground Reference | Signal and power return path; requires low-impedance connection to minimize noise coupling during programming. |
| DC | No Connect | Pin 1 is unconnected - must remain floating or tied to GND per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code - ensures system boot reliability after field updates. |
| Sector-Erasable Architecture | Independent erasure of boot, parameter (2×8K), and main memory blocks (96K/128K) - enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) - prevents spurious writes in electrically noisy environments. |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin bypasses boot block lockout during erase/program - enables emergency recovery without hardware modification. |
| EPROM-Compatible Interface | Standard CE/OE/WE control with TTL-compatible voltage thresholds (VIH = 2.0 V, VIL = 0.6 V) - drop-in replacement for legacy EPROMs in existing designs. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating firmware for programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot code and configuration storage with in-system reprogrammability via RS-485 or CAN interfaces. Use Value: 10,000 write cycles and 50 µA standby current ensure long-term reliability and low power consumption during idle periods between firmware updates. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in portable diagnostic equipment requiring regulatory-compliant firmware integrity. IC Role / Device Role / Timing Role: Secure, lockable boot memory that isolates verified startup code from user-updatable application partitions. Use Value: Boot block lockout and 12V RESET override provide dual-layer security: prevention of accidental corruption and controlled recovery under audit conditions. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
Use Scenario: Storing calibration data and minor firmware patches in body control units where space-constrained PLCC packaging and 2.7–3.6V operation align with vehicle electrical architecture. IC Role / Device Role / Timing Role: Parameter block storage for seat/mirror/window settings and incremental software updates over LIN bus. Use Value: Two independent 8K-byte parameter blocks allow simultaneous storage of active and backup configurations - enabling atomic updates without runtime corruption risk. |
Use Scenario: Hosting field-configurable settings and protocol stacks in remote base station components deployed in unattended outdoor cabinets. IC Role / Device Role / Timing Role: Main memory block storage for telecom stack binaries updated via SNMP or TR-069 management protocols. Use Value: 90 ns read access and 10-second erase enable fast boot times and responsive remote reconfiguration - critical for carrier-grade uptime SLAs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-90-4C-NHE | 4-Mbit density (512K × 8), 90 ns access, 3.0–3.6V supply, PLCC-32 - double capacity but no 12V RESET override or boot block lockout. | Lacks hardware-enforced boot protection and emergency recovery; suited for non-critical data logging rather than secure boot. | Select when higher density is required and boot integrity is managed in software or external logic. |
| MX29LV200CBTI-90G | 2-Mbit (256K × 8), 90 ns, 2.7–3.6V, PLCC-32 - includes CFI compliance and wider temperature range (-40°C to +85°C), but no 12V RESET pin function. | CFI support simplifies auto-detection in generic flash programmers; lacks hardware boot override, limiting field recovery options. | Prefer for new designs needing standardized flash interface and extended industrial temp rating, accepting software-managed lockout. |
Compared with SST39VF200A-90-4C-NHE and MX29LV200CBTI-90G, the AT49BV002-90JC uniquely combines boot block hardware lockout with 12V-enabled override - delivering deterministic, hardware-governed firmware security essential for safety-certified and legacy-replacement applications.
Availability
AT49BV002-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive body control modules, and telecom remote node configuration requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002-90JC 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products including the AT49BV series. The company specializes in secure, reliable microcontrollers and nonvolatile memory solutions for industrial and automotive markets.
The AT49BV002-90JC belongs to Atmel's Battery-Voltage™ Flash family, engineered specifically for low-voltage, in-system reprogrammable code storage in resource-constrained embedded systems where firmware integrity and field upgradeability are critical.
FAQ
What is the operating voltage range for the AT49BV002-90JC?
The AT49BV002-90JC operates from 2.7 V to 3.6 V. This single-supply range eliminates the need for dual-voltage rails and supports direct interfacing with 3.3V microcontrollers and battery-powered systems. Operation below 2.7 V disables programming functions via internal VCC sense circuitry, preventing inadvertent writes during brown-out conditions.
Does the AT49BV002-90JC support hardware write protection for the boot sector?
Yes, the AT49BV002-90JC includes a hardware-enforced boot block programming lockout feature for its 16K-byte boot sector (addresses 00000H–03FFFH). Once enabled via a six-cycle command sequence, the boot block cannot be erased or programmed using standard 5.5V-level signals - ensuring bootloader integrity in deployed systems.
How is end-of-program detection implemented in the AT49BV002-90JC?
The AT49BV002-90JC provides two hardware methods: DATA polling (I/O7 returns complement of written data until completion, then true data) and Toggle Bit (I/O6 toggles between 0 and 1 during programming and stops upon completion). Both methods allow software to monitor write status without external timing components or interrupt lines.
What package type is used for the AT49BV002-90JC?
The AT49BV002-90JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-026). Pin 1 is the index corner, pin 32 is VCC, and pin 1 is designated as "DC" (do not connect) - requiring proper PCB layout to leave it unconnected or grounded per design guidelines.
Can the boot block be reprogrammed after lockout is enabled on the AT49BV002-90JC?
Yes - unlike the N-suffix variants, the AT49BV002-90JC supports boot block reprogramming after lockout activation by applying 12.0 V ± 0.5 V to the RESET pin during chip erase, sector erase, or byte programming operations. This hardware override enables secure field recovery without requiring device replacement.
AT49BV002-90JC 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:
- 2Mbit
- Memory Organization:
- 256K 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)
AT49BV002-90JC FAQ
1.How can I place an order for AT49BV002-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002-90JC 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 AT49BV002-90JC reliable?
The price and inventory of AT49BV002-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002-90JC is usually 5 days.
3.What payment methods are accepted for AT49BV002-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002-90JC?
AT49BV002-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002-90JC 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 AT49BV002-90JC?
For technical support, including AT49BV002-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002-90JC requirements.
6.How does Aetrix verify that AT49BV002-90JC is sourced from the original manufacturer or authorized distributors?
All AT49BV002-90JC 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 AT49BV002-90JC meets industry standards.
7.What is the process for return or replacement of AT49BV002-90JC?
All AT49BV002-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002-90JC, 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 AT49BV002-90JC part is unused and in its original packaging.
Return procedure for AT49BV002-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002-90JC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
