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Microchip Technology AT29BV020-12TC
- Part No.:
- AT29BV020-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29BV020-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,605
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Product details
Overview
AT29BV020-12TC 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, software-protected sector programming, 1024 × 256-byte sectors, two 8K-byte boot blocks with independent lockout, and operates across commercial temperature range (0°C to 70°C).
For engineers reviewing the AT29BV020-12TC datasheet, AT29BV020-12TC pinout, AT29BV020-12TC application, or AT29BV020-12TC equivalent, key selection criteria include single-supply 2.7–3.6 V operation, DATA polling/toggle-bit program status detection, hardware VCC-sense protection, CMOS/TTL-compatible I/O, and PLCC-32 packaging for legacy board compatibility.
Technical Context
The AT29BV020-12TC implements sector-based erase-and-program architecture with internal address/data latches for 256-byte loads, eliminating external buffering requirements. Its software data protection requires a three-byte command sequence (AAh/55h/A0h) before any sector write, preventing inadvertent programming during power transitions or noise events.
Hardware protection includes 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-activated via a seven-command algorithm-permanently disables programming of either the first or last 8K-byte region, supporting secure bootloader storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 1024 sectors × 256 bytes - enables fine-grained firmware updates without full chip erase. |
| Read Access Time | 120 ns max - supports high-speed CPU interface at up to ~8.3 MHz sustained read throughput. |
| Supply Voltage | 2.7 V to 3.6 V single supply - eliminates need for dual-voltage rails or charge pumps in battery-powered systems. |
| Active Current | 15 mA max at 5 MHz - enables low-power operation in portable or energy-constrained embedded designs. |
| Standby Current | 40 µA CMOS standby - reduces quiescent power by >99% vs active mode, critical for always-on firmware storage. |
| Endurance | >10,000 program/erase cycles per sector - ensures long-term field reliability for infrequently updated configuration or calibration data. |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade industrial control panels, consumer electronics, and office equipment. |
Pinout & Package
AT29BV020-12TC is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), JEDEC MS-016 compliant, with 1.27 mm pitch and body size 12.45 × 14.95 mm. Pin 1 identifier is a corner chamfer; leads are J-bent for surface-mount soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus selects one of 262,144 locations; A8–A17 define sector address during programming. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output or byte-load input; supports DATA polling on I/O7 and toggle-bit detection on I/O6. |
| CE | Chip Enable | Active-low global enable; when high, places outputs in high-impedance state and forces CMOS standby current. |
| OE | Output Enable | Active-low read control; used with CE to prevent bus contention and enable multi-device sharing. |
| WE | Write Enable | Active-low programming control; falling edge latches address/data during byte-load phase; must be high during reads. |
| VCC | Power Supply | 2.7–3.6 V main supply; internal VCC sense circuitry disables programming if voltage drops below ~2.0 V. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor required near VCC pin for stable operation. |
| NC | No Connect | Pin 29 (PLCC top view) is unconnected - must remain floating; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) required before every sector program - prevents accidental writes during system reset or EMI events. |
| Boot Block Lockout | Independent enable/disable for first and last 8K-byte regions - secures bootloader code against corruption while allowing application updates elsewhere. |
| DATA Polling & Toggle Bit | I/O7 complement indicates programming progress; I/O6 toggling provides asynchronous status detection - eliminates need for fixed timing delays in firmware. |
| Single-Cycle Sector Erase/Program | Internal timer automates full sector erase followed by 256-byte write - simplifies host controller firmware and reduces software overhead. |
| Hardware Program Inhibit | VCC sense, 10 ms power-on delay, and noise-filtered WE/CE inputs - ensures robust operation in electrically noisy industrial environments. |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage device with sector-level update capability and boot block protection for safe field upgrades. Use Value: Enables reliable in-system reprogramming without removing the module; boot block lockout prevents corruption of safety-critical startup routines. |
Use Scenario: Holding boot loader and initial network stack code in residential and SMB broadband routers requiring secure, field-upgradable firmware. IC Role / Device Role / Timing Role: Primary boot memory mapped to CPU reset vector; accessed during cold start and firmware recovery sequences. Use Value: 120 ns read access ensures fast boot times; dual boot blocks allow A/B firmware partitioning for fail-safe OTA updates. |
| Medical Diagnostic Equipment Calibration Data | Automotive Body Control Module (BCM) Configuration |
Use Scenario: Retaining sensor calibration coefficients and user preferences in portable ultrasound or ECG devices subject to periodic recalibration. IC Role / Device Role / Timing Role: Parameter storage peripheral interfaced via parallel bus; programmed during service calibration using dedicated test software. Use Value: >10,000 endurance cycles support lifetime recalibration; 40 µA standby current extends battery life between clinical sessions. |
Use Scenario: Storing vehicle-specific configuration tables (e.g., door lock timing, lighting profiles) in BCMs where updates occur during dealership service. IC Role / Device Role / Timing Role: Field-programmable configuration memory accessed during power-up initialization and diagnostic mode. Use Value: Software data protection prevents unintended writes during CAN bus transients; sector granularity allows selective table updates without full memory rewrite. |
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 VCC sense below 2.7 V, 1024 × 256-byte sectors | Lacks boot block lockout and hardware VCC-sense protection; requires tighter supply regulation | Preferred where faster read speed is critical and supply stability is guaranteed; not suitable for battery-voltage operation. |
| MX29LV200CTTI-70G | 70 ns read access, 2.7–3.6 V supply, 1024 × 256-byte sectors, boot block lockout supported | Uses different software unlock sequence (555h/2AAh); toggle-bit behavior differs slightly in timing margins | Drop-in replacement for read operations; requires firmware adaptation for programming algorithms and lockout activation. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29BV020-12TC uniquely supports true 2.7 V minimum operation with integrated VCC-sense and deterministic 120 ns timing - making it optimal for legacy designs where supply headroom is constrained and robustness against brown-out conditions is mandatory.
Availability
AT29BV020-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, and medical diagnostic equipment calibration data requiring stable component supply and long-term obsolescence management.
Supply support for AT29BV020-12TC 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, nonvolatile memory, and secure authentication ICs, with a legacy of robust Flash and EEPROM solutions for industrial and automotive markets.
The AT29BV020-12TC belongs to Atmel's Battery-Voltage™ Flash family, engineered for reliable in-system reprogramming in systems powered directly from batteries or unregulated DC supplies - targeting cost-sensitive, space-constrained embedded applications.
FAQ
What is the maximum operating frequency supported by the AT29BV020-12TC for read operations?
The AT29BV020-12TC guarantees a 120 ns read access time, enabling reliable operation with CPU interfaces running up to approximately 8.3 MHz under worst-case timing conditions. This specification is validated across the full 0°C to 70°C commercial temperature range and 2.7–3.6 V supply, with no derating required. The AT29BV020-12TC does not specify a maximum clock frequency but relies on valid setup/hold timing relative to CE and OE signals - actual achievable throughput depends on host bus protocol and wait-state implementation.
Does the AT29BV020-12TC support hardware reset-based programming protection?
Yes, the AT29BV020-12TC incorporates multiple hardware safeguards: VCC sense circuitry disables programming if supply voltage falls below ~2.0 V; a 10 ms internal power-on delay prevents writes during supply ramp-up; and noise filters reject sub-15 ns pulses on WE and CE pins. These features operate independently of software commands and ensure the AT29BV020-12TC remains immune to spurious writes during brown-outs, ESD events, or power sequencing anomalies.
How is boot block lockout activated and verified on the AT29BV020-12TC?
Boot block lockout is enabled via a seven-command software sequence written to specific addresses (5555h/2AAAh/5555h/5555h/2AAAh/4000h/00000h for lower block; same sequence ending with FFh at 3FFFFh for upper block). Verification is performed in Software Product Identification mode: reading address 00002h returns FEh if unlocked or FFh if locked (lower block); reading 3FFF2h yields the same codes for the upper block. Once set, lockout is permanent and disables chip erase functionality.
Can the AT29BV020-12TC be used in place of the AT29BV020-12JC?
Yes - the AT29BV020-12TC and AT29BV020-12JC share identical electrical specifications, timing parameters, and functional behavior; the only difference is package type: TC denotes 32-lead TSOP, while JC denotes 32-lead PLCC. Both are rated for commercial temperature range (0°C to 70°C) and 120 ns access time. PCB layout and signal integrity requirements differ due to package geometry, but no firmware or timing changes are needed when substituting the AT29BV020-12TC for the AT29BV020-12JC.
What are the valid methods to detect end-of-program for the AT29BV020-12TC?
The AT29BV020-12TC provides two hardware-supported methods: DATA polling (monitoring complement-to-data on I/O7 during read attempts) and Toggle Bit detection (observing I/O6 toggling state until it stabilizes). Both methods are fully asynchronous and can be initiated at any point during the 20 ms max program cycle. Neither requires precise timing loops - the AT29BV020-12TC internally manages erase and programming phases, and these status signals reflect actual completion, not estimated duration.
AT29BV020-12TC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29BV020-12TC FAQ
1.How can I place an order for AT29BV020-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29BV020-12TC 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 AT29BV020-12TC reliable?
The price and inventory of AT29BV020-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29BV020-12TC is usually 5 days.
3.What payment methods are accepted for AT29BV020-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29BV020-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29BV020-12TC?
AT29BV020-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29BV020-12TC 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 AT29BV020-12TC?
For technical support, including AT29BV020-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29BV020-12TC requirements.
6.How does Aetrix verify that AT29BV020-12TC is sourced from the original manufacturer or authorized distributors?
All AT29BV020-12TC 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 AT29BV020-12TC meets industry standards.
7.What is the process for return or replacement of AT29BV020-12TC?
All AT29BV020-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29BV020-12TC, 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 AT29BV020-12TC part is unused and in its original packaging.
Return procedure for AT29BV020-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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