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Microchip Technology AT29BV020-15TI
- Part No.:
- AT29BV020-15TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29BV020-15TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,317
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Product details
Overview
AT29BV020-15TI from Atmel is a 2.7V-only, 2 Mbit (256K × 8) Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 120 ns read access time, 20 ms max sector program cycle, software data protection, and dual 8K-byte boot blocks with independent programming lockout - deployed in industrial control firmware storage and BIOS/UEFI boot code retention.
For engineers reviewing the AT29BV020-15TI datasheet, AT29BV020-15TI pinout, AT29BV020-15TI application, or AT29BV020-15TI equivalent, key selection criteria include sector-based reprogrammability, 2.7–3.6 V single-supply operation, CMOS standby current ≤50 µA, and PLCC-32 or TSOP-32 package compatibility for legacy board upgrades.
Technical Context
The AT29BV020-15TI implements sector-erase architecture with 1024 × 256-byte sectors and internal address/data latches enabling microprocessor-speed byte loading. Programming requires a three-byte software unlock sequence (AAh→55h→A0h) before sector write, and supports DATA polling (I/O7 complement) and TOGGLE BIT (I/O6 toggling) for end-of-program detection.
Hardware protection includes VCC sense (<2.0 V inhibits programming), 10 ms power-on delay, noise filtering (<15 ns pulses ignored), and CE/OE/WE logic-level inhibition. Boot block lockout is activated via a seven-command algorithm and disables chip erase when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware images up to 256 KB without external banking logic. |
| Read Access Time | 150 ns max (tACC) - enables direct interface with 6–7 MHz microcontrollers 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 industrial systems. |
| Active Current | 15 mA at 5 MHz / 3.6 V - allows sustained read operations in power-constrained edge nodes without thermal derating. |
| Standby Current | 50 µA max (industrial temp) - extends battery life in always-on monitoring devices during idle periods. |
| Endurance | >10,000 program/erase cycles per sector - supports field-upgradable firmware with multi-year update cadence. |
| Sector Size | 256 bytes per sector - balances granularity for partial updates against overhead of sector management in bootloader code. |
Pinout & Package
AT29BV020-15TI is available in 32-lead PLCC (32J) and TSOP (32T) packages. The -TI suffix denotes Industrial temperature range (–40°C to +85°C) and TSOP packaging.
| 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. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; I/O7 provides DATA polling status; I/O6 provides TOGGLE BIT status during program/erase. |
| CE | Chip Enable | Active-low global enable; must be low for read/write; high state forces outputs to high-Z and enters CMOS standby mode. |
| OE | Output Enable | Active-low read control; used with CE to prevent bus contention; must be high during programming. |
| WE | Write Enable | Active-low write strobe; falling edge latches address/data during byte load; controls timing of software unlock and sector programming. |
| NC | No Connect | Pin 16 (PLCC) and Pin 29 (TSOP); must remain unconnected - no internal connection or function. |
| VCC | Power Supply | 2.7–3.6 V primary supply; powers all logic and memory array; internal VCC sense circuitry prevents programming below ~2.0 V. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor required within 1 cm of VCC pin for stable read/write timing. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) required before every sector program - prevents accidental writes during power transients or firmware bugs. |
| Dual Boot Block Lockout | Independent 8K-byte lockout for lower (0x00000–0x01FFF) and upper (0x3E000–0x3FFFF) memory regions - secures bootloader and recovery image from overwrite. |
| Internal Sector Erase | Automatic erase-before-write per 256-byte sector - eliminates separate erase command and simplifies host firmware logic. |
| DATA Polling & TOGGLE BIT | I/O7 complement and I/O6 toggling provide real-time, bus-compatible program completion signaling - avoids fixed delays and enables deterministic timing in RTOS tasks. |
| CMOS/TTL Input Compatibility | Inputs accept 0–5.5 V regardless of VCC level - allows direct interfacing with 5 V microcontrollers without level shifters in mixed-voltage systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed read stability at –40°C to +85°C and immunity to brown-out events during power cycling. Use Value: Eliminates need for external voltage supervisors or backup batteries while maintaining >10,000 field-update cycles over 10+ years of service life. |
Use Scenario: Holding certified boot loader and safety-critical initialization routines in portable diagnostic equipment requiring regulatory compliance (IEC 62304). IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced lockout of first/last 8K sectors to prevent unauthorized modification of startup code. Use Value: Meets traceability and integrity requirements by isolating immutable boot logic from field-upgradable application partitions. |
| Automotive Telematics Module | Legacy Industrial HMI Display |
|
Use Scenario: Storing OTA update staging area and rollback firmware images in vehicle infotainment gateways with CAN/FlexRay connectivity. IC Role / Device Role / Timing Role: Dual-sector flash providing atomic update capability: one sector active, one staging - with fast 20 ms sector reprogramming. Use Value: Enables fail-safe firmware recovery after interrupted updates without requiring external EEPROM or redundant flash chips. |
Use Scenario: Replacing obsolete EPROMs in aging human-machine interface panels using 5 V microcontrollers and 3.3 V logic level translation. IC Role / Device Role / Timing Role: Drop-in compatible Flash memory with TTL/CMOS input tolerance and 150 ns read access matching original EPROM timing. Use Value: Extends product lifecycle without PCB redesign - leverages existing address/data bus layout and timing margins. |
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 supply only; 70 ns read access; no boot block lockout; 1024-byte sectors. | Lacks independent boot block protection; higher speed but less secure for bootloader storage. | Preferred where faster read performance outweighs security requirements and system uses 3.3 V rails exclusively. |
| MX29LV200CTTI-70G | 3.0–3.6 V supply; 70 ns read; 64K-byte boot blocks; supports CFI query mode. | Wider boot blocks (64K vs 8K); CFI support eases auto-detection in generic flash drivers. | Recommended for new designs needing standardized driver integration and larger protected regions. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29BV020-15TI offers finer-grained (8K) boot protection and true 2.7 V operation - critical for battery-backed or wide-input-range industrial systems where voltage headroom is constrained.
Availability
AT29BV020-15TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and legacy HMI display upgrades requiring stable component supply across extended product lifecycles.
Supply support for AT29BV020-15TI 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 IoT applications.
The AT29BV020-15TI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in low-voltage, space-constrained embedded systems without high-voltage programming circuitry.
FAQ
What is the operating temperature range for the AT29BV020-15TI?
The AT29BV020-15TI is rated for Industrial temperature range: –40°C to +85°C. This is confirmed in the Ordering Information table (page 12), where "-TI" explicitly denotes Industrial grade with 50 µA max standby current. The device meets this specification under full DC and AC operating conditions including tACC = 150 ns and ICC = 15 mA.
Does the AT29BV020-15TI require high-voltage programming signals?
No, the AT29BV020-15TI operates with a single 2.7–3.6 V supply for both read and program operations. High-voltage programming is not required - the software data protection unlock sequence (5555h/2AAAh/5555h) replaces external VPP, and internal circuitry handles sector erase and programming. Hardware protection ensures programming is inhibited below ~2.0 V.
How does boot block lockout work on the AT29BV020-15TI?
The AT29BV020-15TI has two independent 8K-byte boot blocks (lower: 0x00000–0x01FFF; upper: 0x3E000–0x3FFFF). Lockout is enabled via a seven-command algorithm; once activated, those blocks become permanently read-only - no erase or program is possible. Chip erase is disabled if either block is locked. Status is readable via software identification mode at addresses 00002H and 3FFF2H.
What package type does the AT29BV020-15TI use?
The AT29BV020-15TI uses the 32-lead Thin Small Outline Package (TSOP), designated as "32T" in Atmel's ordering information. Its dimensions are 20.0 mm × 8.0 mm × 1.2 mm (L × W × H), compliant with JEDEC MO-142, Variation BD. Pin 1 identifier is marked with a notch or dot per standard TSOP conventions.
Can the AT29BV020-15TI be interfaced directly with a 5 V microcontroller?
Yes - the AT29BV020-15TI inputs (A0–A17, CE, OE, WE) tolerate 0–5.5 V regardless of VCC level (2.7–3.6 V), per "INPUT LEVELS" section (page 3). Outputs (I/O0–I/O7) are CMOS/TTL compatible but limited to 0–VCC+0.6 V; thus, a 5 V MCU must use open-drain or level-shifted reads if driving I/O lines high, though reads are safe with pull-ups to VCC.
AT29BV020-15TI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29BV020-15TI FAQ
1.How can I place an order for AT29BV020-15TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29BV020-15TI 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 AT29BV020-15TI reliable?
The price and inventory of AT29BV020-15TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29BV020-15TI is usually 5 days.
3.What payment methods are accepted for AT29BV020-15TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29BV020-15TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29BV020-15TI?
AT29BV020-15TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29BV020-15TI 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 AT29BV020-15TI?
For technical support, including AT29BV020-15TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29BV020-15TI requirements.
6.How does Aetrix verify that AT29BV020-15TI is sourced from the original manufacturer or authorized distributors?
All AT29BV020-15TI 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 AT29BV020-15TI meets industry standards.
7.What is the process for return or replacement of AT29BV020-15TI?
All AT29BV020-15TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29BV020-15TI, 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 AT29BV020-15TI part is unused and in its original packaging.
Return procedure for AT29BV020-15TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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