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Microchip Technology AT29BV020-12TI
- Part No.:
- AT29BV020-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29BV020-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
AT29BV020-12TI from Atmel is a 2.7V-only, 2 Mbit (256K × 8) in-system Flash memory IC used for nonvolatile program/data storage in embedded controllers and boot code applications. It features 120 ns read access time, 1024 sectors of 256 bytes each, software data protection, and dual 8K-byte boot blocks with independent programming lockout - all operating across -40°C to +85°C industrial temperature range.
For engineers reviewing the AT29BV020-12TI datasheet, AT29BV020-12TI pinout, AT29BV020-12TI application, or AT29BV020-12TI equivalent, key selection considerations include sector-based reprogrammability, 2.7–3.6 V single-supply operation, DATA polling and toggle-bit program status detection, boot block lockout for secure firmware startup, and PLCC-32 or TSOP-32 packaging options.
Technical Context
The AT29BV020-12TI implements a sector-erase-and-program architecture with internal address/data latches for 256-byte loads, eliminating external buffering during reprogramming. Its software data protection requires a three-byte command sequence (AAh/55h/A0h) before any sector write, preventing accidental writes during power transitions or noise events.
Hardware safeguards include VCC sense (<2.0 V inhibits programming), 10 ms power-on delay, OE/CE/WE inhibit logic, and 15 ns noise filtering on control inputs. Boot block lockout is enabled via a seven-command algorithm and disables chip erase once activated - ensuring protected startup code integrity in industrial control and telecom systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware image storage for 8-bit microcontrollers. |
| Read Access Time | 120 ns max - enables direct execution from flash (XIP) in timing-critical boot sequences without wait states. |
| Supply Voltage | 2.7 V to 3.6 V single supply - eliminates need for charge pumps or dual-rail regulators in battery-powered or low-voltage systems. |
| Active Current | 15 mA at 5 MHz - allows integration into power-constrained industrial gateways without thermal derating. |
| Standby Current | 40 µA CMOS standby - extends battery life in always-on monitoring devices between wake cycles. |
| Sector Size | 256 bytes per sector (1024 total) - balances granularity for field updates against overhead of sector management in firmware. |
| Endurance | 10,000 program/erase cycles per sector - supports frequent field firmware upgrades over 10+ year product lifecycles. |
Pinout & Package
AT29BV020-12TI is available in 32-lead PLCC (32J) and TSOP (32T) packages. The industrial-grade -TI suffix denotes -40°C to +85°C operation and applies to both package types. Pin functions are identical across packages.
| 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 during programming. |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high state forces outputs to high-Z and enables CMOS standby mode. |
| 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; initiates byte load during sector programming; toggling controls data latching timing per AC spec. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit multiplexed data path for reads and sector byte loads; supports DATA polling (I/O7) and toggle-bit (I/O6) status detection. |
| NC | No Connect | Unbonded pin; must remain unconnected - no pull-up/down or routing required. |
| VCC | Power Supply | 2.7–3.6 V main supply; includes internal VCC sense circuitry that blocks programming if voltage drops below ~2.0 V. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor (0.1 µF) required within 10 mm of VCC pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh/55h/A0h) required before every sector program - prevents spurious writes during brown-out or ESD events. |
| Boot Block Lockout | Two independent 8K-byte blocks (first/last 8K) can be permanently locked to protect bootloader code from overwrite or corruption. |
| DATA Polling & Toggle Bit | I/O7 complement indicates active programming; I/O6 toggles until completion - enables real-time status monitoring without dedicated status pins. |
| Single-Cycle Sector Reprogram | Internal erase + program executed automatically after 256-byte load - reduces host CPU overhead and eliminates external timing control. |
| CMOS/TTL Input Compatibility | Inputs accept 0–5.5 V regardless of VCC level - simplifies interface to mixed-voltage systems (e.g., 5 V MCU controlling 3.3 V flash). |
Applications
| Industrial PLC Firmware Storage | Telecom Base Station Boot Code |
|---|---|
|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing XIP-capable code execution and field-upgradable parameter tables. Use Value: 120 ns read access enables deterministic boot timing; industrial temperature rating (-40°C to +85°C) ensures reliability in uncontrolled enclosures. |
Use Scenario: Holding boot loader and baseband firmware in cellular infrastructure equipment requiring secure, tamper-resistant startup code. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced lockout of critical 8K boot blocks to prevent unauthorized modification. Use Value: Boot block lockout prevents malicious or accidental overwrite of bootloader; software identification mode allows runtime density detection across product variants. |
| Medical Diagnostic Device Configuration | Automotive Body Control Module (BCM) |
|
Use Scenario: Retaining calibration data, user preferences, and safety-critical configuration parameters in portable ultrasound or ECG units with battery backup. IC Role / Device Role / Timing Role: Low-power nonvolatile storage with 40 µA standby current and robust write protection during power transitions. Use Value: Single 2.7–3.6 V supply eliminates level-shifting; 10,000-cycle endurance supports lifetime recalibration without replacement. |
Use Scenario: Hosting firmware and vehicle-specific settings in body control modules exposed to automotive vibration, thermal cycling, and EMI. IC Role / Device Role / Timing Role: In-system reprogrammable flash enabling OEM firmware updates via diagnostic port without component removal. Use Value: Sector-based programming allows partial updates without erasing entire image; hardware noise filtering prevents false writes in noisy harness environments. |
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, 3.0–3.6 V supply only, no boot block lockout, 100,000-cycle endurance | Lacks hardware-protected boot blocks; higher speed but narrower voltage range limits battery-operated use | Preferred when faster read timing is critical and boot security is managed externally |
| MX29LV200CTTI-70G | 70 ns access, 2.7–3.6 V, top/bottom boot blocks with lockout, 100,000-cycle endurance, JEDEC-standard command set | Uses industry-standard unlock sequence (555h/2AAh); broader ecosystem support but larger die size increases cost | Recommended for new designs requiring long-term supply continuity and standardized programming flow |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29BV020-12TI offers tighter voltage tolerance (2.7 V min), integrated boot lockout with independent enable, and lower standby current - making it optimal for legacy industrial systems where power efficiency and firmware security outweigh raw speed or standardization needs.
Availability
AT29BV020-12TI is available at Aetrix Electronics and suitable for industrial PLCs, telecom base station boot loaders, and medical diagnostic device configuration storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT29BV020-12TI 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 for industrial, automotive, and consumer applications.
The AT29BV020 belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for low-voltage in-system reprogrammability in space-constrained, battery-backed, or wide-temperature embedded systems.
FAQ
What is the maximum operating temperature range for the AT29BV020-12TI?
The AT29BV020-12TI is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table and DC Operating Range section of the datasheet. The "-TI" suffix explicitly denotes this industrial grade. The device maintains full functionality-including 120 ns read access, 40 µA standby current, and reliable sector programming-across this full range without derating.
Does the AT29BV020-12TI require high-voltage programming signals?
No, the AT29BV020-12TI operates with a single 2.7 V to 3.6 V supply for both read and write operations. It does not require external high-voltage generators (e.g., 12 V) for programming. All sector erase and program functions are internally controlled using the standard VCC supply, enabled only after the three-byte software unlock sequence (AAh/55h/A0h) is correctly issued.
How is program completion detected on the AT29BV020-12TI?
Program completion on the AT29BV020-12TI is detected using either DATA polling on I/O7 (which returns the complement of loaded data until completion) or the toggle-bit method on I/O6 (which toggles between 0 and 1 during programming). Both methods are supported simultaneously and require no additional hardware - enabling host software to monitor status in real time without halting other system operations.
Can the boot blocks on the AT29BV020-12TI be unlocked after programming lockout is enabled?
No, the boot block programming lockout feature on the AT29BV020-12TI is irreversible once activated. The seven-command enable algorithm permanently disables further writes to the selected 8K-byte block(s). If lockout is enabled on either boot block, the chip erase function is also disabled. This design ensures absolute protection of critical boot code in mission-critical applications.
What package options are available for the AT29BV020-12TI?
The AT29BV020-12TI is offered in two RoHS-compliant packages: 32-lead Plastic J-Leaded Chip Carrier (PLCC-32, type 32J) and 32-lead Thin Small Outline Package (TSOP-32, type 32T). Both packages share identical pinouts and electrical specifications. The PLCC variant provides enhanced mechanical robustness for high-vibration environments, while the TSOP offers smaller footprint for space-constrained PCB layouts.
AT29BV020-12TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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:
- 20ms
- Access Time:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29BV020-12TI FAQ
1.How can I place an order for AT29BV020-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29BV020-12TI 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 AT29BV020-12TI reliable?
The price and inventory of AT29BV020-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29BV020-12TI is usually 5 days.
3.What payment methods are accepted for AT29BV020-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29BV020-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29BV020-12TI?
AT29BV020-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29BV020-12TI 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 AT29BV020-12TI?
For technical support, including AT29BV020-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29BV020-12TI requirements.
6.How does Aetrix verify that AT29BV020-12TI is sourced from the original manufacturer or authorized distributors?
All AT29BV020-12TI 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 AT29BV020-12TI meets industry standards.
7.What is the process for return or replacement of AT29BV020-12TI?
All AT29BV020-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29BV020-12TI, 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 AT29BV020-12TI part is unused and in its original packaging.
Return procedure for AT29BV020-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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