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Microchip Technology AT29BV020-15JC
- Part No.:
- AT29BV020-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29BV020-15JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,568
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Product details
Overview
AT29BV020-15JC 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, 20 ms max sector programming time, 10,000 write/erase endurance, software data protection, and dual 8K-byte boot blocks with independent lockout.
For engineers reviewing the AT29BV020-15JC datasheet, AT29BV020-15JC pinout, AT29BV020-15JC application, or AT29BV020-15JC equivalent, key selection considerations include its PLCC-32 package, 2.7–3.6 V single-supply operation, sector-based reprogramming architecture, DATA polling and toggle-bit status detection, and industrial temperature range support.
Technical Context
The AT29BV020-15JC implements a sector-erasable Flash architecture with 1024 × 256-byte sectors, enabling in-system reprogramming without high-voltage programming supplies. Its internal address/data latches allow microprocessor-speed byte loading prior to autonomous erase-and-program execution.
It supports both hardware and software data protection: VCC sense (<2.0 V inhibits programming), noise filtering (<15 ns pulses ignored), and a mandatory three-byte unlock sequence (AAh→55h→A0h) before any sector program cycle. Boot block lockout uses a seven-command enable algorithm and disables chip erase when activated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to standard 8-bit microcontroller data buses. |
| Read Access Time | 150 ns max (tACC) - ensures compatibility with 6–7 MHz bus timing in legacy 8-bit systems. |
| Supply Voltage | 2.7 V to 3.6 V single supply - enables direct battery operation (e.g., 3 V coin cell or Li-ion) without level-shifting or charge pumps. |
| Active Current | 15 mA max at 5 MHz - supports low-power embedded operation while maintaining sufficient drive strength for TTL/CMOS loads. |
| Standby Current | 40 µA CMOS standby (commercial temp) - extends battery life in always-on firmware storage applications. |
| Sector Size | 256 bytes per sector - balances granularity for partial updates against overhead of sector management in bootloader logic. |
| Endurance | 10,000 program/erase cycles per sector - qualifies for field-upgradable firmware in industrial control and telecom equipment. |
Pinout & Package
AT29BV020-15JC is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016, Variation AE. Dimensions: 12.45 mm × 14.95 mm × 3.35 mm (max height), with 1.27 mm lead pitch and pin 1 identifier corner.
| 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 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers; supports DATA polling on I/O7 and toggle-bit detection on I/O6. |
| CE | Chip Enable | Active-low chip select; must be low for read or program; high state forces outputs to high-impedance and enters CMOS standby mode. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention; must be high during programming cycles. |
| WE | Write Enable | Active-low write strobe; controls latching of address/data during byte load; toggling initiates sector programming after unlock sequence. |
| 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 for all inputs, outputs, and internal logic; decoupling required near VCC pin. |
| NC | No Connect | Pin 13 (PLCC top view) is unconnected; must remain floating - no external tie or pull-up/down required. |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7–3.6 V supply for read/write | Eliminates need for separate 5 V or 12 V programming rails - simplifies power design and enables true battery-voltage operation. |
| Software data protection (3-byte unlock) | Prevents accidental writes during power-up/down or noise events without requiring external hardware lock signals. |
| Dual 8K-byte boot blocks with independent lockout | Enables secure storage of bootloader code in either lowest or highest memory region, preventing corruption during application firmware updates. |
| DATA polling and toggle-bit status detection | Allows host processor to poll I/O7 or I/O6 instead of using fixed delays - improves system responsiveness and eliminates timing margin uncertainty. |
| Internal address/data latching (256 bytes) | Frees address/data bus immediately after byte loading - enables concurrent background operations during sector programming. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Code |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup routines and user-defined ladder logic; accessed at power-on reset via 8-bit parallel bus. Use Value: 10,000-cycle endurance and -40°C to +85°C industrial rating ensure reliable field updates over 10+ years without replacement. |
Use Scenario: Providing boot code for 8051- or Z80-based medical instruments where space and BOM count are constrained. IC Role / Device Role / Timing Role: Primary boot ROM mapped at 0x0000; lower 8K boot block locked to preserve integrity of initialization routines. Use Value: 150 ns read access meets timing budgets of 6–8 MHz CPU buses; single 3 V supply reduces power rail complexity. |
| Point-of-Sale Terminal Configuration | Telecom Line Card Parameter Storage |
Use Scenario: Holding localized language packs, tax tables, and peripheral calibration data in retail terminals deployed globally. IC Role / Device Role / Timing Role: Field-upgradable parameter memory; updated via serial host interface using parallel Flash programming commands. Use Value: Sector-based reprogramming allows partial updates without erasing entire image; software lockout prevents corruption during power loss. |
Use Scenario: Storing DSP coefficients, line impedance profiles, and firmware patches in DSLAM line cards requiring long-term reliability. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed by TI C54x DSP via EMIF; upper 8K boot block locked for critical initialization vectors. Use Value: 40 µA standby current minimizes idle power draw across hundreds of line cards; DATA polling avoids fixed 20 ms timeouts. |
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 | 4 Mbit density, 70 ns access, 3.3 V only, TSOP-48 package - higher capacity but larger footprint and different pinout. | Requires PCB redesign; suitable for new designs needing >2 Mbit or faster access, not drop-in replacement. | Select only if migrating to larger memory or tighter timing; not compatible with AT29BV020-15JC layout or software drivers. |
| MX29LV200CTTI-70G | 2 Mbit, 70 ns access, 3.0–3.6 V, PLCC-32 - same density and package but lacks boot block lockout and uses different unlock sequence (5555h/2AAAh). | Bootloader security requires external logic; software driver changes needed for command set and status polling. | Consider for cost-sensitive industrial designs where boot block protection is unnecessary and faster timing is required. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29BV020-15JC offers unique boot block lockout and proven 150 ns timing in PLCC-32, making it optimal for legacy 8-bit systems requiring field-safe firmware updates without layout changes.
Availability
AT29BV020-15JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot code, and telecom line card parameter storage requiring stable component supply and long-lifecycle support.
Supply support for AT29BV020-15JC 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 U.S.-based semiconductor company specializing in microcontrollers, Flash memory, and secure authentication devices.
The AT29BV020-15JC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for low-voltage, in-system programmable nonvolatile storage in battery-powered and energy-constrained embedded systems.
FAQ
What is the operating temperature range for the AT29BV020-15JC?
The AT29BV020-15JC is rated for commercial operation from 0°C to +70°C. Its "JC" suffix explicitly denotes the commercial temperature grade, distinguishing it from industrial-grade variants like AT29BV020-15JI (-40°C to +85°C). This range suits office equipment, consumer electronics, and non-harsh-environment embedded applications where ambient thermal stress is limited.
Does the AT29BV020-15JC require high-voltage programming signals?
No, the AT29BV020-15JC operates with a single 2.7 V to 3.6 V supply for both read and program operations. It uses internal charge pumps and a software-controlled unlock sequence (AAh→55h→A0h) instead of external 12 V programming voltages. This eliminates the need for dedicated high-voltage generators and simplifies in-system reprogramming in battery-powered devices.
How does the boot block lockout feature work on the AT29BV020-15JC?
The AT29BV020-15JC contains two 8K-byte boot blocks - one at the lowest addresses (0x00000–0x01FFF) and one at the highest (0x3E000–0x3FFFF). Lockout is enabled via a seven-command software sequence; once activated, those blocks become permanently read-only. The AT29BV020-15JC supports independent locking of either block, verified by reading addresses 00002h (lower) or 3FFF2h (upper).
Can the AT29BV020-15JC be used with 5 V logic interfaces?
Yes - its address and control inputs (A0–A17, CE, OE, WE) tolerate 0–5.5 V regardless of VCC level, enabling direct connection to 5 V microcontrollers without level shifters. However, I/O0–I/O7 pins are limited to 0–(VCC + 0.6 V); with VCC = 3.3 V, that caps I/O voltage at ~3.9 V, so 5 V-tolerant receivers are required on the data bus side.
What status monitoring methods does the AT29BV020-15JC support during programming?
The AT29BV020-15JC provides two hardware-supported status detection methods: DATA polling (monitoring complement-to-data on I/O7) and toggle-bit detection (observing oscillation on I/O6). Both can be initiated at any time during the 20 ms max programming cycle and eliminate reliance on fixed timeout delays, improving system efficiency and robustness in variable-temperature environments.
AT29BV020-15JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29BV020-15JC FAQ
1.How can I place an order for AT29BV020-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29BV020-15JC 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 AT29BV020-15JC reliable?
The price and inventory of AT29BV020-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29BV020-15JC is usually 5 days.
3.What payment methods are accepted for AT29BV020-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29BV020-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29BV020-15JC?
AT29BV020-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29BV020-15JC 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 AT29BV020-15JC?
For technical support, including AT29BV020-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29BV020-15JC requirements.
6.How does Aetrix verify that AT29BV020-15JC is sourced from the original manufacturer or authorized distributors?
All AT29BV020-15JC 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 AT29BV020-15JC meets industry standards.
7.What is the process for return or replacement of AT29BV020-15JC?
All AT29BV020-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29BV020-15JC, 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 AT29BV020-15JC part is unused and in its original packaging.
Return procedure for AT29BV020-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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