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Microchip Technology AT29LV512-20TC
- Part No.:
- AT29LV512-20TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV512-20TC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
AT29LV512-20TC from Atmel is a 512 Kbit (64K × 8) 3.3V-only Flash memory IC designed for in-system reprogrammability in embedded firmware storage applications. It features 120 ns read access time, 20 ms max sector program cycle time, 15 mA active current, and 40 µA CMOS standby current, operating across commercial temperature range (0°C to 70°C) in a 32-lead TSOP package.
For engineers reviewing the AT29LV512-20TC datasheet, AT29LV512-20TC pinout, AT29LV512-20TC application, or AT29LV512-20TC equivalent, key selection considerations include sector-based 128-byte programming, software data protection with three-byte unlock sequence, DATA polling and toggle-bit end-of-program detection, and compatibility with 3.3V microcontroller buses without high-voltage programming support.
Technical Context
The AT29LV512-20TC implements a sector-erasable Flash architecture with 512 independent 128-byte sectors, enabling selective reprogramming without full-chip erase. Its internal address and data latches capture 128 bytes at microprocessor speed before automatic erase-and-program execution.
Operation relies on dual-line chip enable (CE) and output enable (OE) control for bus contention prevention, TTL/CMOS-compatible I/O signaling, and hardware safeguards including 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 | 512 Kbit (64K × 8), sufficient for boot code or configuration data in resource-constrained systems |
| Read Access Time | 200 ns max - defines minimum instruction fetch latency in 3.3V microcontroller interfaces |
| Supply Voltage | 3.0V–3.6V - eliminates need for charge pumps or external 12V programming voltage |
| Active Current | 15 mA at 5 MHz - enables low-power operation during firmware reads in battery-backed systems |
| Standby Current | 40 µA CMOS - supports ultra-low-power sleep modes in always-on embedded devices |
| Sector Program Time | 20 ms max per 128-byte sector - determines firmware update granularity and worst-case write latency |
| Endurance | >10,000 write/erase cycles per sector - supports field-upgradable firmware with long service life |
Pinout & Package
AT29LV512-20TC is packaged in a 32-lead Thin Small Outline Package (TSOP, Type I, 8 mm × 20 mm, JEDEC MO-142 BD), pin-compatible with industry-standard 32-pin Flash memory footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; A0–A6 select byte within 128-byte sector, A7–A15 select sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read/write; supports DATA polling on I/O7 and toggle-bit detection on I/O6 |
| CE | Chip Enable | Active-low device selection; must be low for read/write; high forces high-impedance outputs and standby mode |
| OE | Output Enable | Active-low read control; used with CE to gate output drivers and prevent bus contention |
| WE | Write Enable | Active-low write strobe; initiates byte load during sector programming when CE is low and OE is high |
| VCC | Power Supply | 3.3V ±0.3V supply; internal VCC sense disables programming if voltage drops below 1.8V |
| GND | Ground Reference | Signal and power return; required for stable 3.3V logic thresholds and leakage current control |
| NC | No Connect | Unbonded pins (positions 6, 9, 10, 11 in TSOP top view); must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh→55h→A0h) prevents accidental writes; required before every sector program |
| DATA Polling & Toggle Bit | I/O7 complement indicates ongoing program; I/O6 toggling provides hardware-agnostic end-of-cycle detection |
| Sector-Based Programming | 512 × 128-byte sectors allow partial updates without erasing entire memory - critical for fail-safe firmware patches |
| 3.3V-Only Operation | Eliminates need for 12V programming supplies or level shifters - simplifies PCB layout and power design |
| TTL/CMOS-Compatible I/O | Inputs accept 0–5.5V; outputs drive 3.6V max - enables direct interfacing with mixed-voltage microcontrollers |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets and operational parameters in Class II medical instruments requiring traceable, field-updatable settings. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up and during maintenance mode; 200 ns read timing aligns with ARM Cortex-M3/M4 boot sequences. Use Value: Sector protection ensures calibration data remains intact during firmware updates; 10,000-cycle endurance supports lifetime recalibration intervals. |
Use Scenario: Holding safety-critical bootloader code and encrypted device identity keys in ISO 13485-compliant diagnostic equipment. IC Role / Device Role / Timing Role: Secure boot memory mapped into microcontroller address space; software lock prevents unauthorized modification of startup routines. Use Value: 3.3V-only operation avoids high-voltage injection risks; DATA polling enables deterministic boot-time verification without timeout uncertainty. |
| Automotive Body Control Module (BCM) | Telecom Remote Node Configuration |
|
Use Scenario: Retaining window/mirror position presets and lighting profiles in automotive BCMs exposed to -40°C to +85°C ambient. IC Role / Device Role / Timing Role: EEPROM-replacement Flash memory supporting over-the-air parameter updates via CAN gateway; operates across industrial temperature range. Use Value: 40 µA standby current minimizes parasitic drain on vehicle battery; sector erase allows updating lighting profiles without resetting mirror positions. |
Use Scenario: Storing protocol stack configurations and RF channel maps in outdoor LTE small-cell base stations with limited board space. IC Role / Device Role / Timing Role: Compact TSOP-packaged firmware store interfaced to low-power ARM9 host; 8×20 mm footprint fits dense RF module layouts. Use Value: TSOP package enables automated SMT assembly; 20 ms sector program time supports rapid remote configuration rollouts during maintenance windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF512-70-4C-NHE | 70 ns read access, 3.0–3.6V supply, same 512 Kbit density and TSOP-32 package | Lacks hardware VCC sense and noise-filtered WE input; requires external reset coordination during brownout | Preferred where faster read timing is critical and system-level power supervision is already implemented |
| MX29LV512CTTI-20G | 200 ns read access, 3.0–3.6V, identical sector architecture and software unlock sequence | Supports optional hardware reset pin (RESET#); includes extended data retention guarantee (20 years @ 55°C) | Recommended for long-lifecycle deployments where archival data integrity exceeds Atmel's 10-year spec |
Compared with SST39VF512-70-4C-NHE, AT29LV512-20TC offers superior power-supply fault resilience; compared with MX29LV512CTTI-20G, it lacks RESET# but maintains identical programming flow and pinout - easing migration where reset management is handled externally.
Availability
AT29LV512-20TC is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration retention, and automotive body electronics requiring stable component supply across extended lifecycle programs.
Supply support for AT29LV512-20TC 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.
The AT29LV512 product line was engineered for cost-sensitive, in-system programmable firmware storage in 3.3V embedded systems - prioritizing sector-level flexibility, low standby power, and robustness against inadvertent writes.
FAQ
What is the maximum read access time specified for the AT29LV512-20TC?
The AT29LV512-20TC has a maximum read access time of 200 ns, as indicated by the "-20" suffix in its part number. This value is guaranteed across the commercial temperature range (0°C to 70°C) and 3.0V–3.6V supply voltage. The specification applies to standard read operations with CE and OE asserted low and WE high, and directly impacts boot-time latency when the AT29LV512-20TC is memory-mapped to a microcontroller's address space.
Does the AT29LV512-20TC require high-voltage programming signals?
No, the AT29LV512-20TC operates with 3.3V-only programming - no 12V or 5V programming voltages are needed. All write operations are initiated using standard 3.3V logic levels and a three-byte software unlock sequence (AAh → 55h → A0h). This eliminates external charge pumps and simplifies power design, making the AT29LV512-20TC suitable for compact, low-cost embedded systems where board space and BOM count are constrained.
How many sectors does the AT29LV512-20TC contain, and what is the size of each sector?
The AT29LV512-20TC contains 512 sectors, each consisting of 128 bytes. This sector structure enables granular firmware updates: only modified sectors need reprogramming, preserving unchanged data elsewhere. During programming, all 128 bytes of a selected sector must be loaded before the internal erase-and-program cycle begins - any unloaded byte defaults to FFh. This architecture is integral to the AT29LV512-20TC's use in fail-safe embedded applications.
What methods does the AT29LV512-20TC provide to detect the end of a program cycle?
The AT29LV512-20TC supports two hardware-confirmed end-of-program detection methods: DATA polling on I/O7 (which returns the complement of the last written byte until completion) and toggle-bit detection on I/O6 (which alternates between 0 and 1 during programming and stabilizes upon completion). Both methods allow the host processor to poll asynchronously without fixed timeouts - a key reliability feature for the AT29LV512-20TC in real-time systems where deterministic response is required.
Is the AT29LV512-20TC compatible with both TTL and CMOS logic families?
Yes, the AT29LV512-20TC features TTL- and CMOS-compatible inputs and outputs. Address and control inputs (A0–A15, CE, OE, WE) tolerate 0–5.5V drive levels when VCC = 3.3V ±10%, while I/O lines operate within 0–3.6V. This dual compatibility allows direct interfacing with legacy 5V microcontrollers (via level-tolerant inputs) and modern 3.3V SoCs (via matched output swing), ensuring broad interoperability without external level shifters in mixed-voltage designs involving the AT29LV512-20TC.
AT29LV512-20TC 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:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ms
- Access Time:
- 200 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29LV512-20TC FAQ
1.How can I place an order for AT29LV512-20TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV512-20TC 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 AT29LV512-20TC reliable?
The price and inventory of AT29LV512-20TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV512-20TC is usually 5 days.
3.What payment methods are accepted for AT29LV512-20TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV512-20TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV512-20TC?
AT29LV512-20TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV512-20TC 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 AT29LV512-20TC?
For technical support, including AT29LV512-20TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV512-20TC requirements.
6.How does Aetrix verify that AT29LV512-20TC is sourced from the original manufacturer or authorized distributors?
All AT29LV512-20TC 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 AT29LV512-20TC meets industry standards.
7.What is the process for return or replacement of AT29LV512-20TC?
All AT29LV512-20TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV512-20TC, 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 AT29LV512-20TC part is unused and in its original packaging.
Return procedure for AT29LV512-20TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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