My Inquiry
My Account
Microchip Technology AT49BV002AT-70PI
- Part No.:
- AT49BV002AT-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49BV002AT-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV002AT-70PI from Atmel is a 2.7V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 70 ns read access time, sector-based architecture (including 16 KB boot block at 3C000H–3FFFFH), and hardware data protection. It operates across –40°C to +85°C and supports byte-by-byte programming (30 µs/byte) and 4-second chip erase for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT49BV002AT-70PI datasheet, AT49BV002AT-70PI pinout, AT49BV002AT-70PI application, or AT49BV002AT-70PI equivalent, this page delivers verified technical context, exact pin functions for PLCC-32 packaging, real-world use cases in boot code retention and parameter storage, and two validated alternative Flash parts with documented functional and layout differences.
Technical Context
The AT49BV002AT-70PI implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read timing and command-based write/erase operations. Its internal architecture includes dedicated boot, parameter, and main memory blocks-each independently erasable-and integrates DATA polling and toggle-bit status detection for program/erase cycle completion.
It uses Atmel's nonvolatile CMOS process and features VCC sense, noise filtering on WE/CE, and RESET-driven boot block override (12 V). The device requires no high-voltage programming supply and executes all commands via 5 V–level sequences, enabling direct integration into 3.3 V systems without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader plus configuration tables in resource-constrained MCUs. |
| Read Access Time | 70 ns max - enables direct execution from Flash (XIP) in systems with ≤14 MHz bus clocks without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with single-cell Li-ion or regulated 3.3 V rails; eliminates need for dual-supply design. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small firmware patches or calibration data without system downtime. |
| Erase Cycle Time | 4 seconds max for full chip - deterministic timing simplifies host firmware timeout handling during firmware recovery routines. |
| Endurance | 10,000 program/erase cycles - supports multi-year field updates in industrial controllers and medical devices. |
| Standby Current | 50 µA CMOS - critical for battery-backed applications where low quiescent power extends shelf life. |
Pinout & Package
AT49BV002AT-70PI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE. Pin 1 is marked by a corner notch; package dimensions are 12.32 mm × 14.86 mm × 3.56 mm (max height).
| 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 per datasheet Note 2. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; I/O7 used for DATA polling, I/O6 for toggle-bit status during programming/erase. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared buses. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention; high-Z when inactive, even if CE is low. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming; filtered against <15 ns noise pulses. |
| RESET* | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V applied here overrides boot block lockout (not available on AN variant). |
| VCC | Power Supply | 2.7–3.6 V core supply; internal VCC sense disables programming if voltage drops below ~1.8 V. |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required near VCC/GND pins per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB sector (3C000H–3FFFFH) programmable lockout prevents accidental overwrite of secure bootloader code; enabled via 6-cycle command sequence. |
| Hardware Data Protection | VCC sense, OE/CE/WE inhibit logic, and 15 ns noise filtering eliminate unintended writes during power transients or EMI events. |
| Sector Erase Flexibility | Independent erase of two 8 KB parameter blocks and four main memory blocks (32 KB + 3×64 KB) enables granular firmware updates without full chip erase. |
| Status Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) provide software-controlled, real-time confirmation of program/erase completion. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin re-enables boot block programming even after lockout activation - critical for factory recovery and secure provisioning. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing and updating ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding executable firmware; accessed via parallel bus during MCU boot and runtime updates. Use Value: Sector architecture allows isolated update of application logic without erasing boot loader; 10,000-cycle endurance ensures >10 years of field upgrades under typical maintenance schedules. |
Use Scenario: Securing certified boot code and regulatory-compliant initialization routines in Class II medical infusion pumps requiring FDA audit trails. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection; stores immutable startup sequence executed before application code loads. Use Value: Boot block lockout prevents unauthorized modification; 12 V RESET override enables authorized factory reprogramming - satisfying IEC 62304 traceability requirements. |
| Automotive Telematics Parameter Storage | Point-of-Sale Terminal Configuration Memory |
Use Scenario: Storing vehicle-specific CAN message filters, GPS calibration offsets, and OTA update metadata in telematics control units operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Parameter memory mapped to MCU's external bus; erased/reprogrammed during firmware updates without disrupting real-time CAN communication. Use Value: Two independent 8 KB parameter blocks allow A/B partitioning for atomic configuration swaps; 50 µA standby current minimizes battery drain during ignition-off periods. |
Use Scenario: Holding merchant-specific encryption keys, tax rate tables, and receipt formatting templates in PCI-DSS-compliant POS terminals with frequent firmware revisions. IC Role / Device Role / Timing Role: Secure, field-updatable configuration store; accessed during terminal boot and transaction initialization. Use Value: Hardware data protection prevents key corruption during power loss; 70 ns read speed ensures sub-millisecond response during cryptographic key lookup. |
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 | 3.0–3.6 V operation only; no 2.7 V support; 70 ns access, same 2 Mbit density and PLCC-32 package. | Lacks boot block lockout and 12 V RESET override; uses different command set (SST proprietary vs. Atmel standard). | Choose for cost-sensitive designs where boot protection is handled externally and 2.7 V operation is unnecessary. |
| MX29LV200CTTI-70G | 2.7–3.6 V compatible; 70 ns access; same density and PLCC-32; includes CFI-compliant command set and 16 KB boot sector. | Boot sector location fixed at top of address space (0x1F0000); no 12 V override - lockout is permanent once enabled. | Prefer for new designs requiring industry-standard CFI interface and broader toolchain support, accepting permanent boot lockout. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT49BV002AT-70PI uniquely combines 2.7 V minimum operation, hardware-enforced boot block lockout with 12 V override, and Atmel's mature command-set compatibility - making it optimal for legacy industrial systems requiring guaranteed boot integrity and flexible field recovery.
Availability
AT49BV002AT-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and automotive telematics parameter storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT49BV002AT-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 manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49BV002A(T) series was designed as a drop-in upgrade to EPROM-based systems, delivering in-system reprogrammability, low-voltage operation, and robust data retention for embedded firmware and configuration storage.
FAQ
What is the boot block address range for AT49BV002AT-70PI?
The AT49BV002AT-70PI has its 16 KB boot block located at address range 3C000H to 3FFFFH, distinct from the base AT49BV002A(N) variant which places it at 00000H–03FFFH. This top-address placement simplifies memory mapping in systems where boot code must reside at the highest accessible Flash region.
Does AT49BV002AT-70PI support 2.7 V operation?
Yes, AT49BV002AT-70PI is specified for single-supply operation from 2.7 V to 3.6 V across the industrial temperature range (–40°C to +85°C). Its VCC sense circuitry inhibits programming if supply drops below ~1.8 V, ensuring reliable behavior during brown-out conditions.
How is boot block lockout overridden on AT49BV002AT-70PI?
Boot block lockout on AT49BV002AT-70PI can be overridden by applying 12.0 V ±0.5 V to the RESET pin during chip erase, sector erase, or byte programming operations. Once RESET returns to TTL levels, lockout reactivates - a feature absent in the AN variant.
What package type does AT49BV002AT-70PI use?
AT49BV002AT-70PI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, identified by ordering code suffix "PI". Its dimensions comply with JEDEC MS-016 Variation AE, with pin 1 marked by a corner notch and body size 12.32 mm × 14.86 mm.
Can AT49BV002AT-70PI be programmed using standard 5 V logic levels?
Yes, AT49BV002AT-70PI uses 5 V–level command sequences (e.g., 555H/AAH, AAH/55H) for all operations including read, program, erase, and lockout enable. No high-voltage programming supply is required - all functions execute within the 2.7–3.6 V VCC range.
AT49BV002AT-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
AT49BV002AT-70PI FAQ
1.How can I place an order for AT49BV002AT-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AT-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 AT49BV002AT-70PI reliable?
The price and inventory of AT49BV002AT-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AT-70PI is usually 5 days.
3.What payment methods are accepted for AT49BV002AT-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AT-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AT-70PI?
AT49BV002AT-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AT-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 AT49BV002AT-70PI?
For technical support, including AT49BV002AT-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AT-70PI requirements.
6.How does Aetrix verify that AT49BV002AT-70PI is sourced from the original manufacturer or authorized distributors?
All AT49BV002AT-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 AT49BV002AT-70PI meets industry standards.
7.What is the process for return or replacement of AT49BV002AT-70PI?
All AT49BV002AT-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AT-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 AT49BV002AT-70PI part is unused and in its original packaging.
Return procedure for AT49BV002AT-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002AT-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…
