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Microchip Technology AT29LV020-10JC
- Part No.:
- AT29LV020-10JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV020-10JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,893
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Product details
Overview
AT29LV020-10JC from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 100 ns read access time, 10,000 write/erase cycles endurance, sector-based reprogramming (1024 × 256-byte sectors), and dual 8K-byte boot blocks with independent programming lockout - deployed in industrial control firmware storage and legacy BIOS modules.
For engineers reviewing the AT29LV020-10JC datasheet, AT29LV020-10JC pinout, AT29LV020-10JC application, or AT29LV020-10JC equivalent, key selection criteria include 3.3V-only operation, PLCC-32 packaging, software-controlled sector erase/program, DATA polling and toggle-bit status detection, and boot-block protection for secure startup code retention.
Technical Context
The AT29LV020-10JC implements a CMOS-based Flash PEROM architecture with internal address/data latches enabling 256-byte sector loading at microprocessor speed. Its software data protection requires a three-byte command sequence (AAh→55h→A0h) before any sector program cycle, and hardware safeguards include VCC sense (<1.8V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs.
Operation modes include standard EPROM-like read (CE/OE low, WE high), byte-load programming (WE or CE pulse with OE high), product identification (hardware/software), and optional chip erase via 6-byte code. Boot block lockout is activated by a 7-command algorithm and disables chip erase if enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K bytes for direct byte-addressable firmware storage |
| Supply Voltage | 3.0–3.6 V only - eliminates need for 5V programming voltage or level shifters in 3.3V systems |
| Read Access Time | 100 ns max - supports tight timing margins in 10 MHz bus interfaces without wait states |
| Active Current | 15 mA typical - enables low-power operation during active firmware fetch in portable industrial devices |
| Standby Current | 40 µA (CMOS) - maintains ultra-low quiescent draw during system sleep or idle states |
| Sector Size | 256 bytes × 1024 sectors - allows fine-grained firmware updates without erasing full device |
| Endurance | >10,000 program/erase cycles per sector - sufficient for field-upgradable embedded applications |
Pinout & Package
AT29LV020-10JC is housed in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package compliant with JEDEC MS-016, Variation AE. Dimensions: 12.4 mm × 12.4 mm × 3.4 mm (max height), lead pitch 1.27 mm, body material UL94-V0 rated plastic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A8–A17 select sector, A0–A7 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; TTL/CMOS compatible |
| CE | Chip Enable | Active-low chip select - enables device for read or program; high state forces outputs to high-Z |
| OE | Output Enable | Active-low output control - gates data onto I/O lines during read; must be high during programming |
| WE | Write Enable | Active-low write strobe - initiates byte load during sector programming; used with CE for timing control |
| VCC | Power Supply | +3.3V ±0.3V supply - powers core logic and array; internal regulation ensures stable programming voltage |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required near VCC pin |
| NC | No Connect | Pin 16 (PLCC top view) - internally unconnected; must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) required before every sector program - prevents accidental writes during noise events or power transients |
| Boot Block Lockout | Two independent 8K-byte blocks (00000h–01FFFh and 3E000h–3FFFFh) can be permanently write-protected - secures bootloader and recovery firmware |
| DATA Polling & Toggle Bit | I/O7 complement indicates programming progress; I/O6 toggles during erase/program - enables host CPU to poll status without external hardware |
| Single-Cycle Sector Erase/Program | Internal timer automates full sector erase followed by simultaneous 256-byte programming - reduces host software overhead |
| 3.3V-Only Operation | No 5V or 12V programming voltage needed - simplifies power design and eliminates high-voltage charge pumps |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded BIOS Modules |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access for real-time instruction fetch and sector-level field updates. Use Value: 10,000-cycle endurance and industrial temperature range (-40°C to +85°C) ensure reliable long-term operation across thermal cycling and electrical noise. |
Use Scenario: Holding boot code and hardware initialization routines in x86-compatible embedded motherboards where BIOS compatibility is critical. IC Role / Device Role / Timing Role: EPROM-replacement Flash memory providing 100 ns read timing and pin-compatible upgrade path for legacy designs. Use Value: Dual boot blocks with independent lockout protect primary and fallback BIOS images from corruption during firmware updates. |
| Telecom Line Card Configuration | Medical Device Calibration Data |
Use Scenario: Retaining port mapping, protocol stack settings, and fault logs in carrier-grade DSLAM line cards requiring zero-downtime reconfiguration. IC Role / Device Role / Timing Role: Sector-erasable nonvolatile memory enabling selective parameter updates without full device reflash. Use Value: 256-byte sector granularity allows atomic update of individual configuration tables while preserving operational runtime data. |
Use Scenario: Storing sensor calibration coefficients, usage history, and safety-critical diagnostic flags in Class II medical instruments with regulatory traceability requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage with hardware and software write protection mechanisms. Use Value: Software data protection + VCC-sense inhibit + boot block lockout collectively prevent unauthorized or unintended modification of calibrated values. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV020C-10G | Same density, 3.3V supply, 100 ns access, but uses TSOP-32 package and lacks boot block lockout | Requires PCB redesign for TSOP footprint; no hardware-enforced bootloader protection | Preferred when board space is constrained and boot security is managed in software |
| EN29LV020-10B | Identical PLCC-32 package and pinout; same 100 ns timing, but offers extended -40°C to +105°C temp range | Valid for higher ambient temperature deployments (e.g., under-hood automotive ECUs) | Recommended when operating beyond AT29LV020-10JC's 85°C industrial limit |
Compared with MX29LV020C-10G and EN29LV020-10B, the AT29LV020-10JC uniquely combines PLCC-32 mechanical compatibility, dual boot block lockout, and proven qualification in legacy industrial designs - making it the preferred choice for drop-in replacement in existing 3.3V systems requiring firmware security.
Availability
AT29LV020-10JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded BIOS modules, and telecom line card configuration requiring stable component supply and long-lifecycle support.
Supply support for AT29LV020-10JC 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, with a legacy of robust industrial-grade nonvolatile memory solutions.
The AT29LV020 product line was designed for in-system reprogrammable firmware storage in 3.3V embedded systems, targeting applications requiring EPROM compatibility, sector-level update flexibility, and hardware-enforced boot code protection.
FAQ
What is the operating temperature range for AT29LV020-10JC?
The AT29LV020-10JC is rated for commercial operation from 0°C to +70°C. Its "J" suffix denotes the PLCC-32 package, and "C" specifies the commercial temperature grade. This differs from industrial-grade variants like AT29LV020-10JI, which operate from –40°C to +85°C. The device's DC and AC characteristics, including 100 ns access time and 40 µA standby current, are guaranteed within this 0°C–70°C range.
Does AT29LV020-10JC require a 5V programming voltage?
No, AT29LV020-10JC operates exclusively from a 3.0–3.6 V supply and does not require any high-voltage programming signal. All programming - including sector erase and byte load - is performed using standard 3.3V logic levels and a software-controlled three-byte unlock sequence. This eliminates external voltage translators or charge pumps, simplifying system power architecture.
How is sector programming initiated on AT29LV020-10JC?
Sector programming on AT29LV020-10JC begins only after issuing the software unlock sequence (write AAh to 5555h, 55h to 2AAAh, then A0h to 5555h). Then, up to 256 bytes are loaded into the target sector using WE or CE pulses, with A8–A17 holding the sector address and A0–A7 selecting the byte offset. The internal timer automatically erases and programs the sector upon completion of the byte load.
Can AT29LV020-10JC be used as a direct replacement for standard EPROMs?
Yes, AT29LV020-10JC supports EPROM-like read operations: when CE and OE are low and WE is high, it asserts data on I/O0–I/O7 with 100 ns access time. Its pinout, voltage levels, and timing are compatible with 27C256 and similar 32-pin EPROMs, enabling drop-in replacement in legacy sockets - provided the system accommodates its software-programming protocol instead of UV-erase dependency.
What happens if boot block lockout is enabled on AT29LV020-10JC?
Once enabled via the 7-command algorithm, the designated 8K-byte boot block(s) on AT29LV020-10JC become permanently write-protected: no erase or program commands affect those regions. Critically, enabling lockout on either block also disables the entire-chip erase function. Lockout status can be verified by reading addresses 00002h (lower block) or 3FFF2h (upper block); FEh means unlocked, FFh means locked.
AT29LV020-10JC 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:
- 100 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT29LV020-10JC FAQ
1.How can I place an order for AT29LV020-10JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-10JC 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 AT29LV020-10JC reliable?
The price and inventory of AT29LV020-10JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-10JC is usually 5 days.
3.What payment methods are accepted for AT29LV020-10JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-10JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-10JC?
AT29LV020-10JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-10JC 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 AT29LV020-10JC?
For technical support, including AT29LV020-10JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-10JC requirements.
6.How does Aetrix verify that AT29LV020-10JC is sourced from the original manufacturer or authorized distributors?
All AT29LV020-10JC 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 AT29LV020-10JC meets industry standards.
7.What is the process for return or replacement of AT29LV020-10JC?
All AT29LV020-10JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-10JC, 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 AT29LV020-10JC part is unused and in its original packaging.
Return procedure for AT29LV020-10JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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