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Microchip Technology AT29BV020-15JI
- Part No.:
- AT29BV020-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29BV020-15JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,810
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Product details
Overview
AT29BV020-15JI from Atmel is a 2.7V-only, 2 Mbit (256K × 8) Flash memory IC designed for in-system reprogrammability in embedded controllers and firmware storage applications. It features 120 ns read access time, 20 ms max sector program cycle, 1024 × 256-byte sectors, dual 8K-byte boot blocks with independent lockout, and software/hardware data protection.
For engineers reviewing the AT29BV020-15JI datasheet, AT29BV020-15JI pinout, AT29BV020-15JI application, or AT29BV020-15JI equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), PLCC-32 package compatibility, sector-based programming architecture, DATA polling and toggle-bit status detection, and boot-block write lockout for secure firmware boot code storage.
Technical Context
The AT29BV020-15JI implements a sector-erase-and-program architecture with internal address/data latches for 256-byte loads, eliminating external buffering needs during reprogramming. Its software data protection requires a three-byte command sequence (AAh/55h/A0h) before any sector write, and hardware protection includes VCC sense (<2.0V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs.
It supports standard EPROM-like read operation with CE/OE/WE control logic, and provides two status detection methods-DATA polling on I/O7 and toggle-bit monitoring on I/O6-enabling efficient host CPU wait-state management during program cycles without dedicated timing delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 256 KB firmware image storage. |
| Read Access Time | 150 ns max (tACC) - ensures compatibility with 6–7 MHz microcontroller bus timing without wait states. |
| Supply Voltage | 2.7V to 3.6V single supply - enables direct connection to 3.3V systems without level-shifting or auxiliary regulators. |
| Active Current | 15 mA at 5 MHz - supports low-power embedded operation while maintaining full-speed read performance. |
| Standby Current | 50 µA (industrial temp) - minimizes quiescent power in battery-backed or always-on systems. |
| Endurance | >10,000 program/erase cycles per sector - sufficient for field firmware updates over product lifetime. |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade environmental reliability without derating. |
Pinout & Package
AT29BV020-15JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), JEDEC MS-016 compliant, with 1.27 mm pitch and 12.45 mm × 14.95 mm body size. Pin 1 identifier is a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A7 select byte within 256-byte sector. |
| I/O0–I/O7 | Bi-directional Data Bus | CMOS/TTL-compatible 8-bit data path; I/O7 used for DATA polling, I/O6 for toggle-bit status detection. |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high disables outputs to high-impedance state. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; controls byte-load timing and initiates sector programming after software unlock. |
| VCC | Power Supply | 2.7–3.6V main supply; internal VCC sense circuitry inhibits programming if voltage drops below ~2.0V. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor required near VCC pin for stable operation. |
| NC | No Connect | Pin 16 (PLCC top view) is unconnected - must remain floating, not tied to VCC/GND or routed. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) required before every sector write - prevents accidental firmware corruption during power transients or noise events. |
| Dual Boot Block Lockout | Independent 8K-byte lockout for first and last memory blocks - secures bootloader code against overwrite while allowing application updates elsewhere. |
| Sector-Based Reprogramming | 256-byte granularity with internal latching - frees system bus during 20 ms internal erase+program cycle, enabling concurrent host operations. |
| Status Detection Methods | Hardware-supported DATA polling (I/O7) and toggle-bit (I/O6) - eliminates need for fixed delay loops or external timers in host firmware. |
| Voltage-Tolerant Inputs | Address and control inputs accept 0–5.5V regardless of VCC - simplifies interface to mixed-voltage systems or legacy 5V microcontrollers. |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing field-upgradable firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with secure boot-block lockout and sector-level update capability; operates as memory-mapped peripheral on 8-bit microcontroller bus. Use Value: Enables safe remote firmware patches without risking bootloader corruption; 50 µA standby current extends uptime in battery-buffered backup scenarios. |
Use Scenario: Holding boot loader and configuration images in enterprise-grade network routers requiring secure, reliable startup under frequent power cycling. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; accessed via standard EPROM read protocol with CE/OE/WE handshaking. Use Value: Dual boot blocks allow A/B firmware partitioning; software lockout prevents accidental overwrite of primary boot code during OTA updates. |
| Medical Device Calibration Data | Automotive Body Control Module (BCM) |
Use Scenario: Retaining calibrated sensor offsets and device-specific compensation tables in portable diagnostic equipment with long shelf life and infrequent updates. IC Role / Device Role / Timing Role: Low-power nonvolatile storage accessed only during initialization or calibration mode; sector writes occur during service mode. Use Value: >10,000 endurance cycles support lifetime calibration recalibration; 2.7–3.6V operation matches lithium battery voltage range without regulation. |
Use Scenario: Storing vehicle-specific configuration parameters and minor firmware patches in body control modules exposed to automotive temperature extremes. IC Role / Device Role / Timing Role: In-system programmable flash memory interfaced to 8-bit automotive MCU; programmed via CAN-based bootloader during dealer service. Use Value: Industrial temperature rating (–40°C to +85°C) meets AEC-Q100 Grade 3 requirements; hardware VCC sense prevents partial writes during brown-out conditions. |
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 | 70 ns read access, 3.0–3.6V supply, 48-pin TSOP - faster but narrower voltage range and different pinout. | Lacks boot block lockout; uses different software unlock sequence (5555h/2AAAh/5555h vs. AT29BV020's AA/55/A0). | Preferred where speed >120 ns is critical and boot security is handled externally. |
| MX29LV200CTTI-70G | 70 ns read, 2.7–3.6V, 48-pin TSOP - higher pin count, no PLCC option, includes CFI query support. | Supports common flash interface (CFI); lacks dedicated boot block lockout but offers block protection registers. | Recommended for new designs needing standardized driver support and future scalability to larger densities. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29BV020-15JI offers unique industrial-grade PLCC-32 packaging, dual boot block lockout with independent enable, and robust 2.7V minimum operation - making it optimal for legacy industrial PCBs requiring drop-in replacement and firmware security without layout changes.
Availability
AT29BV020-15JI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT29BV020-15JI 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT29BV020 belongs to Atmel's Battery-Voltage™ Flash family, engineered for reliable in-system reprogramming in 2.7V–3.6V embedded systems where power efficiency, firmware security, and industrial temperature resilience are critical.
FAQ
What is the maximum read access time specified for the AT29BV020-15JI?
The AT29BV020-15JI has a maximum read access time (tACC) of 150 ns, as defined in its AC characteristics table for the -15 speed grade. This value applies under industrial temperature conditions (–40°C to +85°C) and VCC = 3.0V, ensuring deterministic timing for 6–7 MHz microcontroller interfaces without wait-state insertion. The AT29BV020-15JI achieves this while maintaining full compatibility with standard EPROM read protocols using CE, OE, and WE control signals.
Does the AT29BV020-15JI support both PLCC and TSOP packages?
No - the AT29BV020-15JI specifically denotes the industrial-temperature PLCC-32 package (32J). The suffix "JI" stands for "J-leaded, Industrial", whereas "TI" indicates TSOP-32 industrial. Although the AT29BV020 family offers both packages, the AT29BV020-15JI is exclusively the PLCC variant, with mechanical dimensions and pinout matching JEDEC MS-016, Variation AE. Board designs must use the PLCC footprint for this exact part number.
How does the boot block lockout feature work on the AT29BV020-15JI?
The AT29BV020-15JI contains two 8K-byte boot blocks - one at the lowest addresses (0x00000–0x01FFF) and one at the highest (0x3E000–0x3FFFF). Each can be independently locked via a seven-command software sequence. Once enabled, that block becomes permanently read-only: no erase or program operations are possible, and chip erase is disabled. The AT29BV020-15JI retains this lock state even after power cycling, providing tamper-resistant bootloader protection essential for certified embedded systems.
Can the AT29BV020-15JI be programmed using standard 5V microcontroller I/O lines?
Yes - the AT29BV020-15JI's address and control inputs (A0–A17, CE, OE, WE) tolerate 0–5.5V regardless of VCC (2.7–3.6V), enabling direct interface to legacy 5V microcontrollers without level shifters. However, I/O0–I/O7 are strictly limited to 0–VCC+0.6V, so bidirectional data transfer requires either 3.3V-tolerant MCU pins or external level translation on the data bus to avoid damage or undefined behavior during writes.
What status detection methods does the AT29BV020-15JI provide during programming?
The AT29BV020-15JI provides two hardware-supported status detection methods: DATA polling on I/O7 (complement of loaded data until completion) and toggle-bit monitoring on I/O6 (repeated reads cause toggling until program ends). Both operate concurrently and require no additional hardware - the AT29BV020-15JI drives these signals internally during the 20 ms sector program cycle, allowing host firmware to poll efficiently without fixed delays or external timers.
AT29BV020-15JI 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:
- 20ms
- Access Time:
- 150 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29BV020-15JI FAQ
1.How can I place an order for AT29BV020-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29BV020-15JI 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 AT29BV020-15JI reliable?
The price and inventory of AT29BV020-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29BV020-15JI is usually 5 days.
3.What payment methods are accepted for AT29BV020-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29BV020-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29BV020-15JI?
AT29BV020-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29BV020-15JI 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 AT29BV020-15JI?
For technical support, including AT29BV020-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29BV020-15JI requirements.
6.How does Aetrix verify that AT29BV020-15JI is sourced from the original manufacturer or authorized distributors?
All AT29BV020-15JI 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 AT29BV020-15JI meets industry standards.
7.What is the process for return or replacement of AT29BV020-15JI?
All AT29BV020-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29BV020-15JI, 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 AT29BV020-15JI part is unused and in its original packaging.
Return procedure for AT29BV020-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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