My Inquiry
My Account
Microchip Technology AT29LV020-12TC
- Part No.:
- AT29LV020-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV020-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,204
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29LV020-12TC from Atmel is a 2-Mbit (256K × 8) 3.3V-only Flash memory IC used for nonvolatile program/data storage in embedded microcontroller systems. It features 100 ns read access time, 20 ms sector programming, 10,000 write/erase endurance, and dual 8K-byte boot blocks with independent lockout. It operates across commercial temperature range (0°C to 70°C) and supports in-system reprogramming via software data protection.
For engineers reviewing the AT29LV020-12TC datasheet, AT29LV020-12TC pinout, AT29LV020-12TC application, or AT29LV020-12TC equivalent, key selection criteria include sector-based erase architecture, 3.3V-only operation, boot block lockout for firmware protection, DATA polling and toggle-bit programming status detection, and PLCC-32/TSSOP-32 package compatibility.
Technical Context
The AT29LV020-12TC implements a sector-erasable Flash architecture with 1024 × 256-byte sectors and two dedicated 8K-byte boot blocks. Programming requires a three-byte software unlock sequence followed by byte-load cycles within 150 µs windows, with automatic internal sector erase prior to programming.
It uses CMOS-compatible inputs (0–5.5V tolerant) and TTL-compatible outputs, supports hardware and software data protection, and provides dual status detection methods-DATA polling on I/O7 and toggle-bit monitoring on I/O6-enabling robust host system integration without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling full firmware image storage for 8-bit MCUs with limited external memory space |
| Read Access Time | 120 ns max - meets timing requirements for 8 MHz Z80 or 68K-based legacy control systems |
| Supply Voltage | 3.3 V ± 0.3 V - eliminates need for 5 V supply rail or level shifters in modern low-voltage designs |
| Active Current | 15 mA max - supports battery-backed or energy-constrained industrial controllers during active read |
| Standby Current | 40 µA max (CMOS) - enables ultra-low-power sleep modes in always-on embedded devices |
| Endurance | >10,000 program/erase cycles per sector - sufficient for field-upgradable firmware with infrequent updates |
| Operating Temp | 0°C to 70°C - certified for commercial-grade instrumentation, POS terminals, and office equipment |
Pinout & Package
AT29LV020-12TC is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), pin-compatible with JEDEC MS-016 AE variant. The package measures 12.45 mm × 14.95 mm × 3.35 mm and features J-leads for reliable socket or reflow mounting in high-reliability applications.
| 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 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers; supports both read output and program input |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high-Z output when high - prevents bus contention in multi-device systems |
| OE | Output Enable | Active-low output control; allows data read without asserting CE - useful for memory-mapped I/O arbitration |
| WE | Write Enable | Active-low write strobe; initiates byte load during programming; combined with CE for timing-critical sector writes |
| NC | No Connect | Pin 16 (PLCC top view); must remain unconnected - no internal function or pull-up/pull-down |
| VCC | Power Supply | +3.3 V supply input; requires local 0.1 µF ceramic decoupling near pin to suppress switching noise during program cycles |
| GND | Ground Reference | Signal and power ground return; shared with MCU ground plane to minimize read/write timing skew |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh→55h→A0h) required before any sector programming - prevents accidental firmware corruption during power transients or noise events |
| Dual Boot Block Lockout | Independent 8K-byte upper/lower boot blocks can be permanently locked after enable algorithm - secures bootloader code against overwrite in field-deployed systems |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling provide real-time, bus-synchronous programming status - eliminates need for fixed delay timers or external interrupt lines |
| Single-Cycle Sector Erase/Program | Entire 256-byte sector erased and programmed in one internal operation - simplifies host firmware logic and reduces update latency vs. page-by-page architectures |
| Input Voltage Tolerance | Address and control inputs accept 0–5.5 V while powered at 3.3 V - enables direct interfacing with 5 V logic without level translators in mixed-voltage systems |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Instrumentation |
|---|---|
|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers requiring field updates without hardware replacement. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to MCU address space; provides deterministic 120 ns read access for real-time scan cycle execution. Use Value: Dual boot blocks allow safe A/B firmware partitioning; sector lockout prevents corruption of critical startup routines during remote OTA updates. |
Use Scenario: Retaining calibration constants and sensor compensation tables in benchtop test equipment with long product lifecycles and infrequent recalibration. IC Role / Device Role / Timing Role: Read-mostly data storage accessed during initialization and periodic self-test; low 40 µA standby current extends battery backup life. Use Value: >10,000 endurance cycles support decades of recalibration events; 3.3 V-only operation simplifies power design versus older 5 V EPROM alternatives. |
| Point-of-Sale Terminal BIOS | Medical Device Configuration Memory |
|
Use Scenario: Holding secure boot code and peripheral driver modules in retail POS terminals subject to PCI-DSS compliance requirements. IC Role / Device Role / Timing Role: Boot ROM executing immediately post-reset; boot block lockout ensures immutable first-stage loader integrity. Use Value: Hardware + software data protection layers prevent malicious or erroneous writes; 120 ns access enables fast boot times under strict regulatory timing constraints. |
Use Scenario: Storing device-specific calibration offsets and usage logs in Class II medical analyzers requiring traceable, tamper-resistant configuration storage. IC Role / Device Role / Timing Role: Secure nonvolatile memory accessed only during service mode; DATA polling confirms write completion for audit trail generation. Use Value: Manufacturer and device codes (1Fh/BAh) enable automated BOM verification; industrial temp grade optional for sterilization-capable enclosures. |
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 | 2 Mbit, 70 ns read, 3.3 V, TSOP-48 package; lacks boot block lockout and uses different unlock sequence | Higher speed but larger footprint; no native boot protection - requires external logic or firmware overhead for secure boot | Choose when faster read performance is prioritized over firmware security features and board space is not constrained. |
| MX29LV200CBTI-70G | 2 Mbit, 70 ns read, 3.3 V, TSOP-48; includes CFI query support and uniform 64K-byte sectors (no boot blocks) | CFI compatibility simplifies generic flash drivers but removes dedicated boot sector isolation - increases risk of accidental bootloader overwrite | Prefer for systems using standardized flash abstraction layers; avoid where bootloader integrity is mission-critical. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CBTI-70G, the AT29LV020-12TC trades raw speed for deterministic boot security, smaller 32-pin footprint, and simpler software protection - making it optimal for cost-sensitive, safety-aware legacy embedded platforms.
Availability
AT29LV020-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded instrumentation, and point-of-sale terminal BIOS requiring stable component supply, long-lifecycle support, and verified second-source availability.
Supply support for AT29LV020-12TC 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 secure authentication ICs for industrial and automotive markets.
The AT29LV020 belongs to Atmel's legacy low-voltage Flash memory product line, designed specifically for 3.3 V embedded systems needing field-upgradable firmware storage with hardware-enforced boot protection.
FAQ
What is the maximum read access time specified for the AT29LV020-12TC?
The AT29LV020-12TC has a maximum read access time of 120 ns, as indicated by the "-12" suffix in its part number. This value is guaranteed across the commercial temperature range (0°C to 70°C) and at VCC = 3.3 V ± 0.3 V. The AT29LV020-12TC achieves this timing using advanced nonvolatile CMOS process technology, enabling compatibility with 8 MHz microcontroller buses without wait states.
Does the AT29LV020-12TC support in-system programming without high-voltage signals?
Yes, the AT29LV020-12TC supports full in-system programming using only the standard 3.3 V supply - no external 12 V or 5 V programming voltage is required. Programming is initiated via a documented three-byte software unlock sequence (AAh → 55h → A0h), after which sector-based byte loads proceed at microprocessor speed. This capability is intrinsic to the AT29LV020-12TC architecture and eliminates need for dedicated programmers or high-voltage circuitry.
How does the boot block lockout feature work on the AT29LV020-12TC?
The AT29LV020-12TC contains 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 using a seven-command enable algorithm. Once activated, that block becomes read-only: no erase or program operations are possible. The AT29LV020-12TC supports software detection of lockout status via reads from 0x00002H (lower) and 0x3FFF2H (upper), returning FFh if locked.
Can the AT29LV020-12TC be used with 5 V logic interfaces?
Yes - the AT29LV020-12TC's address and control inputs (A0–A17, CE, OE, WE) tolerate 0–5.5 V when operating at VCC = 3.3 V, allowing direct connection to 5 V microcontrollers or FPGAs without level-shifting components. However, I/O0–I/O7 pins are limited to 0–3.6 V and must interface only with 3.3 V–compatible devices. This hybrid tolerance makes the AT29LV020-12TC suitable for mixed-voltage legacy system upgrades.
What programming status detection methods does the AT29LV020-12TC provide?
The AT29LV020-12TC provides two hardware-confirmed programming status detection methods: DATA polling on I/O7 (complement of last loaded byte indicates ongoing program cycle) and toggle-bit monitoring on I/O6 (toggling between 0 and 1 during programming, stopping upon completion). Both methods are accessible over the standard data bus and require no additional pins or external components - a key design advantage of the AT29LV020-12TC for resource-constrained hosts.
AT29LV020-12TC 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:
- 120 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29LV020-12TC FAQ
1.How can I place an order for AT29LV020-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV020-12TC 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 AT29LV020-12TC reliable?
The price and inventory of AT29LV020-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV020-12TC is usually 5 days.
3.What payment methods are accepted for AT29LV020-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV020-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV020-12TC?
AT29LV020-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV020-12TC 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 AT29LV020-12TC?
For technical support, including AT29LV020-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV020-12TC requirements.
6.How does Aetrix verify that AT29LV020-12TC is sourced from the original manufacturer or authorized distributors?
All AT29LV020-12TC 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 AT29LV020-12TC meets industry standards.
7.What is the process for return or replacement of AT29LV020-12TC?
All AT29LV020-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV020-12TC, 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 AT29LV020-12TC part is unused and in its original packaging.
Return procedure for AT29LV020-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29LV020-12TC 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…
