My Inquiry
My Account
Microchip Technology AT49BV002N-90VC
- Part No.:
- AT49BV002N-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002N-90VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,138
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV002N-90VC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply Flash memory IC designed for in-system reprogrammability in embedded boot code storage. It operates from 2.7–3.6 V, delivers 70 ns read access time, supports sector-erase architecture with 16 KB boot block and hardware data protection, and is used in microcontroller-based systems requiring secure firmware storage and field-upgradable BIOS or bootloader code.
For engineers reviewing the AT49BV002N-90VC datasheet, AT49BV002N-90VC pinout, AT49BV002N-90VC application, or AT49BV002N-90VC equivalent, key selection criteria include its 32-pin VSOP package, boot-block lockout capability, DATA polling/Toggle Bit programming status detection, and compatibility with standard microprocessor bus timing (CE/OE/WE control).
Technical Context
The AT49BV002N-90VC implements a CMOS-based NOR Flash architecture with five-volt-only command set for read, byte-program, and sector/chip erase operations - no external high-voltage programming supply required. Its internal program controller manages erase timing (10 s max), byte programming (30 µs typical), and automatic pulse generation.
It features dual-line chip enable (CE) and output enable (OE) control to prevent bus contention, hardware reset-driven boot-block override (not available on N variant), and DC-level voltage sensing to inhibit inadvertent writes below 1.8 V. The device uses address latching on falling CE/WE edges and data latching on rising edges per standard microprocessor write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader + parameter storage in resource-constrained MCU systems. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic rails and battery-backed operation without level-shifting. |
| Read Access Time | 90 ns - meets timing requirements for 11 MHz bus interfaces in industrial controllers and communication modules. |
| Byte Programming Time | 30 µs typical - enables fast field updates of configuration parameters or patch code without system downtime. |
| Erase Cycle Time | 10 seconds maximum - allows predictable in-system firmware update windows during maintenance or OTA staging. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - supports long-term field deployment in industrial HMI and gateway devices. |
| Standby Current | 50 µA CMOS - critical for low-power battery-operated edge nodes where flash remains powered but idle. |
Pinout & Package
AT49BV002N-90VC is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm, with gull-wing leads and standard JEDEC MO-179 footprint. Pin 9 is a no-connect (NC) terminal 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 within 8-bit data bus. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, ARM7, and other microcontrollers using standard SRAM-like timing. |
| CE | Chip Enable | Active-low enable controlling device selection; dual-line control with OE prevents bus contention during shared-memory access. |
| OE | Output Enable | Active-low output gate; when high, places I/O pins in high-impedance state - essential for multi-device bus arbitration. |
| WE | Write Enable | Active-low signal initiating byte programming or command latch; falling edge latches address, rising edge latches data per microprocessor cycle. |
| RESET | Reset Input | Logic-high = normal operation; low = halts ongoing program/erase and forces high-Z outputs; not used for boot-block override in N variant. |
| VCC | Power Supply | Single 2.7–3.6 V supply - eliminates need for separate VPP programming voltage, simplifying power design. |
| GND | Ground Reference | Common return path for all signals and power; decoupling capacitor placement near this pin is mandatory for noise immunity. |
| DC | No-Connect | Pin 9 is unconnected internally - must be left floating or tied to GND per layout guidelines; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB protected sector (00000H–03FFFH) prevents accidental overwrite of bootloader code once enabled via 6-byte command sequence. |
| Sector Architecture | Four independently erasable regions: one 16 KB boot block, two 8 KB parameter blocks, and two main memory blocks (96 KB + 128 KB) - enables modular firmware updates. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits write), noise filtering (<15 ns pulses ignored), and CE/OE/WE state monitoring prevent spurious programming during power transients. |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection via I/O7 complement or I/O6 toggling - removes reliance on worst-case timing margins in host firmware. |
| Standard Microprocessor Interface | CE/OE/WE control logic matches 8080/8051 timing - enables drop-in replacement for EPROM or SRAM in legacy designs without glue logic. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing secure, field-upgradable startup code and configuration data accessed at power-on reset. Use Value: 10,000-cycle endurance and -40°C to +85°C industrial temp range ensure reliable operation over 10+ years in unattended machinery. | 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 boot memory with hardware lockout preventing unauthorized modification of FDA/IEC 62304-compliant startup sequences. Use Value: Boot block programming lockout ensures immutable bootloader execution, meeting traceability and anti-tampering requirements for Class II medical devices. |
| Telecom Edge Router Configuration | Automotive Infotainment Update Cache |
Use Scenario: Caching firmware patches and network stack configurations in carrier-grade small cell base stations operating in thermally constrained enclosures. IC Role / Device Role / Timing Role: In-system reprogrammable Flash acting as persistent configuration store updated via remote management protocols. Use Value: 90 ns read access enables real-time packet processing pipeline integration; 50 µA standby current minimizes thermal load in sealed housings. | Use Scenario: Staging over-the-air (OTA) software updates in automotive head units before atomic activation during vehicle service mode. IC Role / Device Role / Timing Role: Dual-sector Flash memory partitioned to hold active firmware and pending update image simultaneously. Use Value: Independent sector erase allows background download into spare block while running from primary block - enabling zero-downtime updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-90-4C-NHE | 2 Mbit, 3.0–3.6 V, 90 ns access, same 32-pin TSOP/VSOP footprint but lacks boot-block lockout and uses different command set. | No hardware-protected boot sector; requires external software management for bootloader integrity. | Select when boot security is handled at application layer and legacy SST command compatibility is preferred. |
| MX29LV020TC-90G | 2 Mbit, 3.0–3.6 V, 90 ns access, 32-pin TSOP package; includes boot-block protection but uses different address mapping (top/bottom boot) and 12 V RESET override. | Supports both top- and bottom-boot configurations; RESET pin functionality differs - not pin-compatible with AT49BV002N-90VC. | Choose for designs needing flexible boot sector location or requiring 12 V RESET override capability unavailable in N variant. |
Compared with SST39VF020-90-4C-NHE and MX29LV020TC-90G, the AT49BV002N-90VC provides deterministic boot-block lockout via documented 6-byte command sequence and guaranteed 10,000-cycle endurance - critical for safety-critical embedded systems where firmware immutability must be hardware-enforced.
Availability
AT49BV002N-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader, and telecom edge router configuration requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002N-90VC 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 AT49BV002N-90VC belongs to Atmel's Battery-Voltage™ Flash family, engineered for reliable in-system reprogramming in battery-powered and 3.3 V embedded systems where low-voltage operation and data integrity are paramount.
FAQ
What is the memory organization of the AT49BV002N-90VC?
The AT49BV002N-90VC contains 2 Mbit of NOR Flash memory organized as 262,144 words × 8 bits (256K × 8). Its physical address space spans 00000H to 3FFFFH, divided into one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB). This structure is fixed for the AT49BV002N-90VC variant.
Does the AT49BV002N-90VC support hardware boot-block protection?
Yes, the AT49BV002N-90VC supports hardware-enforced boot-block lockout via a documented six-byte command sequence. Once enabled, the 16 KB boot sector (00000H–03FFFH) becomes permanently write-protected under standard 2.7–3.6 V operation. This feature is intrinsic to the AT49BV002N-90VC and does not require external circuitry.
What package type is used for the AT49BV002N-90VC?
The AT49BV002N-90VC uses a 32-lead Very Small Outline Package (VSOP) measuring 8 mm × 14 mm (JEDEC MO-179). Pin 9 is designated as "Don't Connect" (DC) and must remain unconnected. This package is distinct from PLCC, PDIP, and TSOP variants in the same family.
Can the AT49BV002N-90VC be programmed using standard microprocessor timing?
Yes, the AT49BV002N-90VC is fully compatible with standard 8080/8051-style microprocessor bus timing. It uses CE, OE, and WE control signals with address latched on the falling edge of CE or WE (whichever occurs last) and data latched on the rising edge - eliminating need for custom timing generators or high-voltage programmers.
What methods does the AT49BV002N-90VC provide to detect end-of-program or end-of-erase?
The AT49BV002N-90VC offers two hardware-supported status detection 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 operation, stops toggling upon completion). Both methods allow host firmware to poll asynchronously without fixed delays.
AT49BV002N-90VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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-VSOP
AT49BV002N-90VC FAQ
1.How can I place an order for AT49BV002N-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002N-90VC 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 AT49BV002N-90VC reliable?
The price and inventory of AT49BV002N-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002N-90VC is usually 5 days.
3.What payment methods are accepted for AT49BV002N-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002N-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002N-90VC?
AT49BV002N-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002N-90VC 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 AT49BV002N-90VC?
For technical support, including AT49BV002N-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002N-90VC requirements.
6.How does Aetrix verify that AT49BV002N-90VC is sourced from the original manufacturer or authorized distributors?
All AT49BV002N-90VC 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 AT49BV002N-90VC meets industry standards.
7.What is the process for return or replacement of AT49BV002N-90VC?
All AT49BV002N-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002N-90VC, 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 AT49BV002N-90VC part is unused and in its original packaging.
Return procedure for AT49BV002N-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002N-90VC 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…
