My Inquiry
My Account
Microchip Technology AT29LV020-12JC
- Part No.:
- AT29LV020-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV020-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29LV020-12JC 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, 20 ms sector program cycle time, 10,000 write/erase endurance per sector, and dual 8K-byte boot blocks with independent programming lockout - deployed in industrial control firmware storage and BIOS boot code retention.
For engineers reviewing the AT29LV020-12JC datasheet, AT29LV020-12JC pinout, AT29LV020-12JC application, or AT29LV020-12JC equivalent, key selection criteria include sector-based reprogrammability, software data protection sequence compliance, boot block lockout verification, and PLCC-32 package compatibility with legacy 8-bit bus interfaces.
Technical Context
The AT29LV020-12JC implements sector-erase architecture with 1024 × 256-byte sectors, internal address/data latches enabling microprocessor-speed byte loading, and automatic erase-before-program sequencing. Its software data protection requires a three-byte command sequence (AAh→55h→A0h) to enable programming, preventing inadvertent writes during power transitions or noise events.
It supports DATA polling on I/O7 and toggle-bit detection on I/O6 for end-of-program indication, operates across 0°C to 70°C (Commercial), and uses CMOS/TTL-compatible I/Os with 3.3V ±0.3V supply. Hardware protections include VCC sense (<1.8V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K bytes - matches standard 8-bit microcontroller data bus width without external demultiplexing. |
| Read Access Time | 120 ns max - meets timing requirements for 8 MHz Z80 or 8051-based systems with no wait states. |
| Supply Voltage | 3.0V to 3.6V only - eliminates need for 5V-to-3.3V level shifters in modern low-voltage embedded designs. |
| Active Current | 15 mA max at 5 MHz - enables low-power operation in battery-backed or energy-constrained industrial controllers. |
| Standby Current | 40 µA CMOS standby - supports >1-year retention in always-on monitoring devices with periodic wake-up. |
| Sector Size | 256 bytes per sector - allows fine-grained firmware updates without erasing full memory, reducing field upgrade risk. |
| Endurance | 10,000 program/erase cycles per sector - sufficient for 5+ years of daily field firmware patching in telecom edge nodes. |
Pinout & Package
AT29LV020-12JC is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE, with lead coplanarity ≤0.102 mm and body dimensions 12.45 × 14.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A0–A7 select byte within sector, A8–A17 select sector. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K families; supports DATA polling on I/O7 and toggle-bit on I/O6. |
| CE | Chip Enable | Active-low chip select; when high, forces outputs to high-impedance - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low read control; used with CE to gate output drivers - enables shared bus arbitration without external logic. |
| WE | Write Enable | Active-low programming control; initiates byte load or sector program cycle when CE is low and OE is high. |
| VCC | Power Supply | +3.3V ±0.3V supply input; internal VCC sense disables programming if voltage drops below 1.8V (typical). |
| GND | Ground | Signal and power reference plane; decoupling capacitor required within 10 mm of VCC/GND pins per datasheet layout guidance. |
| NC | No Connect | Pin 29 (PLCC top view) - must remain unconnected; floating or tied to GND/VCC may cause latch-up or timing violation. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h→2AAAh→5555h) required before any sector programming - prevents accidental firmware corruption during debug or brown-out conditions. |
| Dual Boot Block Lockout | Independent 8K-byte lockout for lower (0x0000–0x1FFF) and upper (0x3E000–0x3FFFF) memory regions - secures bootloader and recovery image from overwrite. |
| Internal Program Timer | Automated 20 ms sector erase-and-program cycle with no external timing components - simplifies host controller firmware and reduces BOM count. |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling - eliminates need for fixed-delay polling loops and improves system responsiveness. |
| Hardware Write Inhibit | VCC sense, 10 ms power-on delay, and 15 ns noise filter on WE/CE - ensures robust operation in electrically noisy industrial environments. |
Applications
| Industrial PLC Firmware Storage | Embedded BIOS Boot Code Retention |
|---|---|
|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-level update capability; provides deterministic 120 ns read access for real-time scan-cycle execution. Use Value: Dual boot blocks prevent corrupted firmware from disabling safe startup; 10,000-cycle endurance supports quarterly field updates over 10+ year product life. |
Use Scenario: Holding boot loader and POST routines in x86-compatible embedded motherboards used in kiosks and medical displays. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; supports hardware/software identification mode for dynamic sector-size detection during initialization. Use Value: Software lockout of lower 8K boot block ensures bootloader integrity; 3.3V-only operation eliminates level-shifter cost in modern low-power SBC designs. |
| Telecom Edge Node Configuration | Legacy Instrumentation Data Logging |
|
Use Scenario: Storing protocol stacks and calibration tables in remote radio units deployed in cellular base stations with limited maintenance windows. IC Role / Device Role / Timing Role: Field-upgradable configuration store; uses DATA polling to minimize CPU overhead during over-the-air firmware patches. Use Value: 20 ms sector programming enables <100 ms firmware segment updates; 40 µA standby current extends backup battery life during network outages. |
Use Scenario: Recording sensor calibration coefficients and operational logs in portable test equipment powered by rechargeable Li-ion batteries. IC Role / Device Role / Timing Role: Low-power nonvolatile storage interfaced directly to 8-bit MCU; retains data through 1000+ power cycles without supercapacitor support. Use Value: CMOS-compatible I/Os reduce interface complexity; 256-byte sector granularity allows selective update of calibration data without disturbing firmware. |
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, 512-byte sectors, 100,000 endurance cycles - faster but coarser erase granularity. | Lacks boot block lockout; requires external hardware protection for bootloader safety. | Preferred when higher speed and longer endurance outweigh boot security needs. |
| MX29LV200CTTI-70G | 70 ns read, 4K-byte sectors, 100,000 cycles, supports CFI query - broader industry toolchain support. | Single 16K boot block only; no independent upper/lower lockout capability. | Recommended for new designs requiring standardized flash programming tools and wider vendor support. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT29LV020-12JC offers finer 256-byte sector control and dual independent boot lockout - critical for safety-critical firmware partitioning - while trading off speed and endurance for proven reliability in long-lifecycle industrial deployments.
Availability
AT29LV020-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded BIOS boot code retention, and telecom edge node configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT29LV020-12JC 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, nonvolatile memory, and secure authentication ICs for industrial and automotive markets.
The AT29LV020-12JC belongs to Atmel's legacy LV-series Flash memory product line, designed specifically for 3.3V-only in-system reprogrammability in space-constrained embedded systems with strict power and reliability requirements.
FAQ
What is the maximum operating temperature range for the AT29LV020-12JC?
The AT29LV020-12JC is rated for commercial temperature operation from 0°C to +70°C. Its datasheet specifies this range explicitly in the Ordering Information table and DC Operating Range section. The "JC" suffix denotes the PLCC-32 package with commercial-grade thermal specification. Industrial variants (e.g., AT29LV020-12JI) extend to –40°C to +85°C, but the AT29LV020-12JC itself is not qualified beyond 70°C ambient.
Does the AT29LV020-12JC support hardware reset-based programming protection?
No, the AT29LV020-12JC does not implement hardware reset-based programming protection. It relies exclusively on software data protection (three-byte unlock sequence) and hardware features including VCC sense, 10 ms power-on delay, and noise filtering on WE/CE inputs. There is no dedicated reset pin or hardware lock bit; protection is enforced through input voltage thresholds and timing constraints, not a dedicated reset-driven state machine.
Can the AT29LV020-12JC be used in a 5V system without level shifting?
No, the AT29LV020-12JC is a 3.3V-only device and must not be operated from a 5V supply. While its address and control inputs tolerate up to 5.5V (per INPUT LEVELS section), VCC must remain within 3.0V–3.6V. Applying 5V to VCC will exceed absolute maximum ratings and cause permanent damage. Level shifters are required for 5V bus interfacing, though input tolerance allows direct connection of 5V logic signals to OE, CE, and WE.
How many sectors does the AT29LV020-12JC have, and what is the sector size?
The AT29LV020-12JC contains 1024 sectors, each 256 bytes in size. This is confirmed in the Features section ("1024 Sectors (256 Bytes/Sector)") and reinforced in the Description ("Sector Program Operation") and Programming Algorithm sections. Sector addressing uses A8–A17, providing exactly 10 bits of sector address space (2¹⁰ = 1024), with A0–A7 selecting the byte within the sector.
Is the AT29LV020-12JC pin-compatible with the AT29LV020-10JC?
Yes, the AT29LV020-12JC is pin-compatible with the AT29LV020-10JC. Both share identical PLCC-32 packaging, pinout, and electrical interface. The only difference is the maximum read access time: 120 ns for the -12JC versus 100 ns for the -10JC. All other timing, functional, and mechanical specifications - including sector architecture, software protection, and boot block lockout - are identical across speed grades within the same package type.
AT29LV020-12JC 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:
- 120 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)
AT29LV020-12JC FAQ
1.How can I place an order for AT29LV020-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-12JC 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 AT29LV020-12JC reliable?
The price and inventory of AT29LV020-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-12JC is usually 5 days.
3.What payment methods are accepted for AT29LV020-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-12JC?
AT29LV020-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-12JC 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 AT29LV020-12JC?
For technical support, including AT29LV020-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-12JC requirements.
6.How does Aetrix verify that AT29LV020-12JC is sourced from the original manufacturer or authorized distributors?
All AT29LV020-12JC 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 AT29LV020-12JC meets industry standards.
7.What is the process for return or replacement of AT29LV020-12JC?
All AT29LV020-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-12JC, 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 AT29LV020-12JC part is unused and in its original packaging.
Return procedure for AT29LV020-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29LV020-12JC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
