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Microchip Technology AT29BV020-15TC
- Part No.:
- AT29BV020-15TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29BV020-15TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
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Product details
Overview
AT29BV020-15TC from Atmel is a 2.7V-only, 2 Mbit (256K × 8) Flash memory IC designed for in-system reprogrammability in embedded control and boot code storage applications. It features 120 ns read access time, 20 ms max sector program cycle, software data protection, dual 8K-byte boot blocks with independent lockout, and operates across commercial temperature range (0°C to 70°C) with 2.7–3.6V single supply.
For engineers reviewing the AT29BV020-15TC datasheet, AT29BV020-15TC pinout, AT29BV020-15TC application, or AT29BV020-15TC equivalent, key selection criteria include sector-based programming timing, boot block lockout behavior, DATA polling/Toggle Bit status detection, and PLCC-32 package compatibility with legacy board layouts.
Technical Context
The AT29BV020-15TC implements a sector-erase-and-program architecture with 1024 × 256-byte sectors, internal address/data latches for full-sector loading, and automatic erase-before-write sequencing. Its software data protection requires a three-byte command sequence (AAh/55h/A0h) before any sector programming, preventing inadvertent writes during power transitions or noise events.
Hardware protection includes VCC sense (<2.0V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs (rejects <15 ns pulses). Boot block lockout-activated via a seven-command algorithm-permanently disables programming/erasure of either the lower (0x00000–0x01FFF) or upper (0x3E000–0x3FFFF) 8K-byte region, supporting secure boot code retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 150 ns max - determines minimum CPU wait states for zero-wait-state operation at ≤6.7 MHz |
| Supply Voltage | 2.7V to 3.6V - enables direct battery-voltage operation without regulators in portable systems |
| Active Current | 15 mA max at 5 MHz - defines peak power draw during sequential reads |
| Standby Current | 40 µA CMOS - supports ultra-low-power sleep modes in battery-backed systems |
| Sector Program Time | 20 ms max per 256-byte sector - sets firmware update latency and system responsiveness during field upgrades |
| Endurance | >10,000 write/erase cycles per sector - ensures reliability for infrequently updated configuration or calibration data |
Pinout & Package
AT29BV020-15TC is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), compliant with JEDEC MS-016 Variation AE. The package measures 12.45 mm × 12.45 mm × 3.35 mm (max height), with J-leads and pin 1 identifier marked by a corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; A0–A7 select byte within 256-byte sector, A8–A17 select sector |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high forces outputs to high-Z and inhibits programming |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads; high disables outputs |
| WE | Write Enable | Active-low write strobe; initiates byte load during programming; OE must be high when WE and CE are both low |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit data path for reads and sector programming; supports DATA polling on I/O7 and Toggle Bit on I/O6 |
| VCC | Power Supply | 2.7–3.6V main supply; powers core logic and I/O buffers; VCC sense circuitry prevents programming below ~2.0V |
| GND | Ground | Reference for all signals and power; decoupling capacitor required near VCC/GND pins |
| NC | No Connect | Pin 29 (PLCC top view); must remain unconnected; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7–3.6V Supply Operation | Eliminates need for high-voltage programming circuitry or external charge pumps in embedded systems |
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) required before every sector program, preventing accidental writes |
| Dual Independent Boot Block Lockout | Two 8K-byte regions (low and high address) can be permanently write-protected to safeguard boot firmware |
| DATA Polling & Toggle Bit Status Detection | I/O7 complement and I/O6 toggling provide real-time, non-intrusive program completion signaling without requiring timers or interrupts |
| Internal Sector Erase + Program Timer | Automated erase-before-write eliminates external timing control; 20 ms max cycle time simplifies host firmware |
| CMOS/TTL-Compatible I/O | Inputs accept 0–5.5V regardless of VCC; outputs drive standard TTL loads, easing integration with mixed-voltage systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding initialization routines and safety-critical control algorithms executed at power-up. Use Value: Dual boot block lockout prevents corruption of certified startup code during field firmware updates, ensuring regulatory compliance and functional safety integrity. |
Use Scenario: Holding boot loader and diagnostic firmware in portable ultrasound or infusion pump systems powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-voltage Flash memory enabling direct battery-powered operation without voltage boosting, reducing BOM count and power loss. Use Value: 2.7V minimum operating voltage and 40 µA standby current extend battery life between charges while maintaining secure boot code integrity. |
| Legacy Embedded System Upgrade Path | Automotive Body Control Module (BCM) Configuration |
Use Scenario: Replacing obsolete EPROMs in legacy industrial controllers where PCB layout cannot accommodate new packages or pinouts. IC Role / Device Role / Timing Role: Pin-compatible Flash replacement for 32-pin PLCC EPROMs, supporting in-system reprogramming without hardware redesign. Use Value: PLCC-32 footprint and identical control signal timing (CE/OE/WE) allow drop-in replacement, eliminating costly board respins and qualification delays. |
Use Scenario: Storing vehicle-specific calibration tables and feature enablement flags in BCMs subject to ESD and thermal cycling in under-hood environments. IC Role / Device Role / Timing Role: Industrial-grade (-40°C to +85°C) nonvolatile memory retaining settings across ignition cycles and battery disconnects. Use Value: Hardware VCC sense and noise filtering on WE/CE inputs prevent spurious writes during load dump or cranking transients, ensuring data reliability. |
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 only, no boot block lockout, TSOP-48 package | Lacks dedicated boot block protection; requires external software management of critical firmware regions | Preferred when faster read speed is prioritized over secure boot isolation and PLCC-32 footprint compatibility |
| MX29LV200CTTI-70G | 70 ns read access, 2.7–3.6V, boot block architecture (top/bottom 16K), TSOP-48 | Same boot block concept but different lockout mechanism and larger sector size (4K vs 256B) | Selected when migrating to newer Flash families with enhanced endurance (>100K cycles) and wider industry support, accepting TSOP-48 layout change |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29BV020-15TC offers unique value in legacy PLCC-32 designs requiring hardware-enforced boot block write protection and 150 ns read timing-without demanding board-level changes or sacrificing in-system reprogrammability.
Availability
AT29BV020-15TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and legacy embedded system upgrade paths requiring stable component supply and long-term obsolescence management.
Supply support for AT29BV020-15TC 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, Flash memory, and security ICs for embedded and industrial applications.
The AT29BV020 belongs to Atmel's Battery-Voltage™ Flash family, engineered for reliable in-system reprogramming in battery-powered and space-constrained devices where single-supply simplicity and boot code security are essential.
FAQ
What is the maximum read access time specified for the AT29BV020-15TC?
The AT29BV020-15TC has a maximum read access time of 150 ns, as indicated by the "-15" suffix in its part number. This parameter defines the worst-case delay from address stabilization and CE/OE assertion to valid data appearing on I/O0–I/O7. It enables zero-wait-state operation with microcontrollers running up to approximately 6.7 MHz and is verified under commercial temperature conditions (0°C to 70°C) with VCC = 2.7–3.6V. The AT29BV020-15TC meets this specification consistently across its rated operating range.
Does the AT29BV020-15TC support true in-system programming without high-voltage signals?
Yes, the AT29BV020-15TC supports full in-system programming using only its standard 2.7–3.6V VCC supply-no external high-voltage generator or programming adapter is required. Programming is initiated via a software-controlled three-byte unlock sequence followed by sector-based byte loading. The device internally manages erase and program timing, and status is monitored via DATA polling on I/O7 or Toggle Bit on I/O6. This capability makes the AT29BV020-15TC ideal for field-upgradable embedded systems where physical access is limited.
How does the boot block lockout feature work on the AT29BV020-15TC?
The AT29BV020-15TC includes two independent 8K-byte boot blocks-one at the lowest addresses (0x00000–0x01FFF) and one at the highest (0x3E000–0x3FFFF). Each can be permanently locked against programming and erasure using a dedicated seven-command software algorithm. Once enabled, the lockout cannot be reversed, ensuring boot code immutability. Lockout status is readable via software product identification mode: reading address 00002H returns FEh if the lower block is unlocked or FFh if locked; similarly, 3FFF2H reports upper block status. This feature is integral to the AT29BV020-15TC's secure boot architecture.
Can the AT29BV020-15TC be used in systems with mixed 3.3V and 5V logic interfaces?
Yes, the AT29BV020-15TC supports mixed-voltage interfacing: its address and control inputs (A0–A17, CE, OE, WE) tolerate 0–5.5V regardless of VCC level (2.7–3.6V), allowing direct connection to 5V microcontrollers or FPGAs without level shifters. However, I/O0–I/O7 are limited to 0–(VCC + 0.6V), so they must interface only with 3.3V-compatible devices when VCC = 3.3V. This input voltage tolerance simplifies integration into heterogeneous systems while maintaining safe operation-confirmed in the AT29BV020-15TC's DC characteristics table.
What package type is used for the AT29BV020-15TC, and is it compatible with standard PLCC sockets?
The AT29BV020-15TC uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J in Atmel's ordering information. Its mechanical dimensions (12.45 mm × 12.45 mm body, 3.35 mm max height) and lead pitch (1.27 mm) comply with JEDEC MS-016 Variation AE, ensuring full compatibility with standard 32-pin PLCC sockets and rework tools. Pin 1 is identified by a corner notch, matching industry-standard orientation. This package choice preserves design continuity for legacy systems originally using EPROMs like the 27C256 or 27C512 in PLCC-32 form factor-making the AT29BV020-15TC a direct physical and electrical replacement.
AT29BV020-15TC 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:
- 150 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
AT29BV020-15TC FAQ
1.How can I place an order for AT29BV020-15TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29BV020-15TC 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 AT29BV020-15TC reliable?
The price and inventory of AT29BV020-15TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29BV020-15TC is usually 5 days.
3.What payment methods are accepted for AT29BV020-15TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29BV020-15TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29BV020-15TC?
AT29BV020-15TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29BV020-15TC 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 AT29BV020-15TC?
For technical support, including AT29BV020-15TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29BV020-15TC requirements.
6.How does Aetrix verify that AT29BV020-15TC is sourced from the original manufacturer or authorized distributors?
All AT29BV020-15TC 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 AT29BV020-15TC meets industry standards.
7.What is the process for return or replacement of AT29BV020-15TC?
All AT29BV020-15TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29BV020-15TC, 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 AT29BV020-15TC part is unused and in its original packaging.
Return procedure for AT29BV020-15TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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