My Inquiry
My Account
Microchip Technology AT49BV002A-70PI
- Part No.:
- AT49BV002A-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49BV002A-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,429
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV002A-70PI from Atmel is a 2.7 V–3.6 V single-supply, 2 Mbit (256K × 8) Flash memory IC with 70 ns read access time, sector-erase architecture (1×16K boot block, 2×8K parameter blocks, 4×main blocks), and hardware data protection. It supports byte-programming at 30 µs/byte and chip erase in ≤4 seconds, targeting embedded firmware storage in industrial microcontroller systems.
For engineers reviewing the AT49BV002A-70PI datasheet, AT49BV002A-70PI pinout, AT49BV002A-70PI application, or AT49BV002A-70PI equivalent, this page delivers verified electrical specs, PLCC-32 pin mapping, boot-block lockout behavior, DATA polling/toggle-bit status detection, and real-world use cases for secure code storage and in-system reprogramming.
Technical Context
The AT49BV002A-70PI implements a standard parallel Flash interface with CE/OE/WE control logic and RESET input for operation halting. Its internal program controller handles command sequences-including chip erase (6-byte sequence), sector erase (address-specific), and byte programming-without external timing clocks.
It features dual-mode product identification (hardware/software), boot-block lockout override via 12 V on RESET (enabled only on non-N/T variants), and hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and multi-input inhibit (OE low, CE high, or WE high blocks writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 2 Mbit (262,144 × 8 bits), organized as 256K words × 8 bits - directly maps to 16-bit microcontroller data buses without glue logic. |
| Read Access Time | 70 ns max - enables direct connection to 14 MHz+ bus systems without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic rails and battery-backed industrial systems (Battery-Voltage™ design). |
| Byte Programming Time | 30 µs typical - allows rapid field updates of configuration or calibration data without system interruption. |
| Erase Cycle Time | 4 seconds max for full chip erase - supports predictable firmware recovery windows in embedded bootloaders. |
| End-of-Operation 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 - validated for long-term use in industrial HMI and PLC firmware storage. |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention during sleep modes in battery-operated edge devices. |
Pinout & Package
AT49BV002A-70PI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package per JEDEC MS-016, Variation AE, with 1.27 mm pitch and pin 1 identifier notch. Pin 1 is A7 (not NC), and RESET is functional (unlike AT49BV002AN/T variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A11 is don't-care in command cycles. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; controls latching of address/data in command sequences. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention; high during programming/erase to tri-state outputs. |
| WE | Write Enable | Active-low write strobe; falling edge latches address, rising edge latches data in command and programming cycles. |
| RESET | Reset Input | Active-low halt signal; high-to-low transition aborts ongoing operations; 12 V applied enables boot-block override (unique to A variant). |
| I/O0–I/O7 | Data Bus | Bidirectional 8-bit data path; I/O7 used for DATA polling, I/O6 for toggle-bit status monitoring during programming/erase. |
| VCC | Power Supply | 2.7–3.6 V supply; internal regulation ensures stable core voltage across rail variation. |
| GND | Ground | Reference for all inputs/outputs; decoupling required within 10 mm of VCC pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector-based Erase Architecture | Enables selective update of boot code (16K), parameters (2×8K), or application data (4×main blocks) without full-chip erase overhead. |
| Boot Block Programming Lockout | Software-enabled permanent write protection for boot sector (00000H–03FFFH); prevents accidental corruption of bootloader firmware. |
| Hardware Data Protection | VCC sense, noise filtering, and multi-input inhibit collectively eliminate spurious writes from power transients or EMI. |
| 12 V RESET Override | Allows reprogramming of locked boot block using 12 V ±0.5 V on RESET pin - critical for factory recovery and secure firmware rollback. |
| Standard EPROM-Compatible Interface | Uses CE/OE/WE control signals identical to EPROMs, enabling drop-in replacement in legacy designs without logic redesign. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
|
Use Scenario: Storing field-upgradable ladder logic and I/O configuration in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with 70 ns read access enabling deterministic scan-cycle execution. Use Value: Sector erase permits updating application logic while preserving boot code integrity; 50 µA standby current extends uptime during maintenance mode. |
Use Scenario: Securing certified bootloader code in FDA-cleared diagnostic equipment requiring tamper-proof startup verification. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write lockout preventing unauthorized firmware modification. Use Value: Boot block lockout + 12 V RESET override enables both field safety compliance and controlled factory recovery paths. |
| Automotive Body Control Module | Point-of-Sale Terminal Configuration |
|
Use Scenario: Holding vehicle-specific calibration tables and CAN protocol stacks in body control units exposed to wide temperature swings (−40°C to +85°C). IC Role / Device Role / Timing Role: Automotive-grade Flash memory with 2.7–3.6 V operation tolerating battery brownouts and load-dump events. Use Value: 10,000-cycle endurance and 4-second erase support frequent recalibration updates over 15-year vehicle lifetime. |
Use Scenario: Storing localized language packs, tax rate tables, and peripheral driver settings in retail terminals deployed globally. IC Role / Device Role / Timing Role: In-system reprogrammable configuration store accessible via standard microcontroller parallel bus. Use Value: Byte-programming (30 µs) enables fast over-the-air updates of regional settings without full firmware reflashing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | Same 2 Mbit density and 70 ns access, but uses 3.0–3.6 V supply and lacks RESET-based boot-block override. | No 12 V override capability; requires external logic for boot-sector recovery in secure systems. | Select when cost sensitivity outweighs need for hardware-assisted boot recovery. |
| MX29LV200CBTI-70G | 2 Mbit, 70 ns, 2.7–3.6 V, but implements CFI-compliant command set and lacks dedicated boot-block lockout register. | Relies on software-managed sector protection; no hardware-enforced boot lockout or 12 V override. | Prefer for CFI-standard toolchain compatibility where boot security is managed at firmware layer. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CBTI-70G, the AT49BV002A-70PI uniquely integrates hardware-enforced boot-block lockout with 12 V RESET override - delivering stronger physical-layer security for bootloader integrity in safety-critical embedded systems.
Availability
AT49BV002A-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloaders, and automotive body control modules requiring stable component supply across extended lifecycle commitments.
Supply support for AT49BV002A-70PI 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 innovator specializing in microcontrollers, Flash memory, and secure authentication solutions for industrial and automotive markets.
The AT49BV002A-70PI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in 3.3 V embedded systems where low-voltage operation and boot-code security are mandatory.
FAQ
What is the function of the RESET pin on the AT49BV002A-70PI?
The RESET pin on the AT49BV002A-70PI serves two roles: (1) active-low reset to halt ongoing operations and tri-state outputs, and (2) 12 V ±0.5 V input to override boot-block lockout - a feature exclusive to the AT49BV002A variant. This dual functionality enables both safe operation interruption and secure factory recovery. The AT49BV002A-70PI datasheet confirms RESET is functional (unlike AT49BV002AN/T), and its override capability is explicitly defined in the Boot Block Programming Lockout Override section.
Does the AT49BV002A-70PI support in-system programming without high-voltage supplies?
Yes, the AT49BV002A-70PI supports full in-system reprogramming using only its 2.7–3.6 V VCC supply - no external 12 V or 5 V programming voltage is required. All command sequences (chip erase, sector erase, byte programming) execute via standard 5 V–compatible logic-level signals (CE/OE/WE), with internal charge pumps generating necessary programming voltages. This is confirmed in the "Description" section and "Device Operation" chapter of the AT49BV002A-70PI datasheet (Rev. 3353D).
How does boot block protection work on the AT49BV002A-70PI?
The AT49BV002A-70PI implements boot block protection via a six-command software sequence that permanently disables programming/erasure of the 16K-byte boot sector (00000H–03FFFH) for input voltages ≤5.5 V. Once enabled, only application of 12 V to the RESET pin can re-enable writes - a hardware-enforced security boundary. This behavior is documented in the "Boot Block Programming Lockout" and "Boot Block Lockout Override" sections of the AT49BV002A-70PI datasheet.
What package type is used by the AT49BV002A-70PI?
The AT49BV002A-70PI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, designated as "32P6" in Atmel's ordering information. Its mechanical dimensions conform to JEDEC MS-016, Variation AE, with 1.27 mm lead pitch and pin 1 identifier notch. This package is explicitly listed for AT49BV002A-70PI in the "AT49BV002A Ordering Information" table (page 14) and illustrated in the PLCC drawing (page 15) of the AT49BV002A-70PI datasheet.
Can the AT49BV002A-70PI be used as a direct replacement for EPROMs?
Yes, the AT49BV002A-70PI is designed as an EPROM-compatible Flash memory: it uses identical CE/OE/WE control signaling, outputs valid data when CE and OE are low and WE is high, and places outputs in high-impedance state when CE or OE is high. Its 70 ns access time matches common 27C256 EPROMs, and the AT49BV002A-70PI datasheet explicitly states "Reading data out of the device is similar to reading from an EPROM." No bus-interface logic changes are required for migration.
AT49BV002A-70PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49BV002A-70PI FAQ
1.How can I place an order for AT49BV002A-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002A-70PI 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 AT49BV002A-70PI reliable?
The price and inventory of AT49BV002A-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002A-70PI is usually 5 days.
3.What payment methods are accepted for AT49BV002A-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002A-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002A-70PI?
AT49BV002A-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002A-70PI 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 AT49BV002A-70PI?
For technical support, including AT49BV002A-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002A-70PI requirements.
6.How does Aetrix verify that AT49BV002A-70PI is sourced from the original manufacturer or authorized distributors?
All AT49BV002A-70PI 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 AT49BV002A-70PI meets industry standards.
7.What is the process for return or replacement of AT49BV002A-70PI?
All AT49BV002A-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002A-70PI, 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 AT49BV002A-70PI part is unused and in its original packaging.
Return procedure for AT49BV002A-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002A-70PI 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…
