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Microchip Technology AT28LV010-20PI
- Part No.:
- AT28LV010-20PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28LV010-20PI.pdf
- Description:
- IC EEPROM 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT28LV010-20PI from Atmel is a 1-Mbit (128K × 8) low-voltage paged parallel EEPROM with JEDEC-standard byte-wide pinout, 200 ns read access time, and single 3.3V ±10% supply operation. It supports automatic 1–128-byte page writes with internal latching and timer control, and delivers 15 mA active current and 20 µA CMOS standby current for embedded memory retention in industrial temperature range (−40°C to +85°C).
For engineers reviewing the AT28LV010-20PI datasheet, AT28LV010-20PI pinout, AT28LV010-20PI application, or AT28LV010-20PI equivalent, this device serves as a drop-in replacement for legacy 5V EEPROMs in space-constrained industrial controllers, firmware storage modules, and configuration memory systems requiring reliable nonvolatile write endurance and hardware/software data protection.
Technical Context
The AT28LV010-20PI implements a static RAM-compatible read interface with dual-line chip enable (CE) and output enable (OE) control, enabling bus contention avoidance in multi-peripheral systems. Its write architecture relies on a 128-byte internal page register and software data protection (SDP) command sequence (0x5555/0x2AAA/0x5555) to gate all programming operations.
End-of-write detection is supported via DATA polling on I/O7 (complement-to-data toggle) and TOGGLE BIT behavior on I/O6, both usable at any point during the internal 10 ms max page write cycle. The device uses advanced CMOS process technology to achieve 100,000 write cycles endurance and 10-year data retention without external high-voltage circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces 27C010/27C020 in 8-bit microcontroller boot memory designs. |
| Read Access Time | 200 ns maximum - enables direct interfacing with 5 MHz Z80, 8051, or 68K-based systems without wait states. |
| Page Write Cycle | ≤10 ms - allows full 128-byte page programming in one atomic operation, reducing host CPU overhead vs. byte-by-byte writes. |
| Supply Voltage | 3.3 V ±10% - eliminates need for level shifters when used with modern 3.3V logic families and microcontrollers. |
| Endurance & Retention | 100,000 write cycles / 10 years data retention - validated for long-life industrial firmware storage where field updates are infrequent but critical. |
| Operating Temperature | −40°C to +85°C - qualified for use in programmable logic controllers, motor drives, and outdoor instrumentation without derating. |
| Standby Current | 20 µA (CMOS) - supports ultra-low-power sleep modes in battery-backed or energy-harvesting systems. |
Pinout & Package
AT28LV010-20PI is supplied in a 32-lead plastic dual inline package (PDIP), 0.600" wide (package code 32P6), with JEDEC-standard byte-wide pinout compatible with industry EEPROM footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A7–A16 define page boundaries for 128-byte writes. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path; I/O7 provides DATA polling status, I/O6 provides TOGGLE BIT end-of-write indication. |
| CE | Chip Enable | Active-low global enable; must be low for read/write access; high state forces outputs to high-impedance and inhibits writes. |
| OE | Output Enable | Active-low read control; used with CE to manage bus contention; high state disables outputs regardless of CE/WE state. |
| WE | Write Enable | Active-low write strobe; falling edge latches address/data; rising edge initiates internal write cycle after SDP command validation. |
| VCC | Power Supply | 3.3V ±10% primary supply; includes internal power-on delay (~5 ms) to prevent inadvertent writes during power ramp-up. |
| GND | Ground Reference | Signal and power return; decoupling capacitor (0.1 µF) required within 1 cm of VCC/GND pins per datasheet layout guidance. |
| NC | No Connect | Two unconnected pins (Pin 1 and Pin 32 in PDIP); must remain floating - no pull-up/down or routing allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection (SDP) | Three-byte command sequence (0x5555/0x2AAA/0xA0) required before every write - prevents accidental overwrites during power transitions or noise events. |
| Hardware Write Inhibit | Automatic 5 ms VCC power-on delay + WE/CE/OE state monitoring - blocks writes unless all three control lines meet valid timing and logic conditions. |
| DATA Polling & TOGGLE BIT | Dual asynchronous write completion detection via I/O7 complement-read or I/O6 toggling - eliminates need for fixed delays or external timers in host firmware. |
| Paged Write Architecture | 128-byte internal latch with auto-timed programming - reduces host bus occupancy by up to 99% vs. byte-wise writes for block updates. |
| JEDEC Byte-Wide Pinout | Pin-compatible with 27C010, 27C020, and AT28C256 - enables drop-in replacement in existing PCB layouts without redesign. |
Applications
| Industrial PLC Configuration Storage | Firmware Boot Memory for 8-bit MCUs |
|---|---|
|
Use Scenario: Storing ladder logic parameters, I/O mapping tables, and calibration coefficients in programmable logic controllers operating in factory environments with voltage fluctuations and EMI. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during cold start and runtime parameter updates; requires guaranteed 10-year retention and immunity to brown-out writes. Use Value: Hardware/software write protection and 20 µA standby current ensure data integrity across 24/7 operation with no backup battery needed. |
Use Scenario: Holding bootloader code and initial stack setup for Z80 or 8051 microcontrollers in legacy industrial equipment where ROM replacement is cost-prohibitive. IC Role / Device Role / Timing Role: Parallel boot memory mapped at 0x0000–0x1FFFF; read-access timing must meet 200 ns requirement to avoid CPU wait states. Use Value: 200 ns access time and JEDEC pinout allow direct substitution of obsolete 27C010 without PCB or firmware changes. |
| Field-Upgradeable Sensor Calibration Data | Embedded System Parameter Backup |
|
Use Scenario: Storing sensor offset/gain coefficients updated during field calibration of pressure transmitters or flow meters exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: Write-once-per-calibration nonvolatile storage with verified 100,000-cycle endurance; page write minimizes host MCU intervention time. Use Value: 128-byte page write capability enables full calibration dataset update in ≤10 ms, reducing downtime during maintenance windows. |
Use Scenario: Preserving user preferences, network settings, and operational history in medical infusion pumps and diagnostic analyzers requiring FDA-compliant data persistence. IC Role / Device Role / Timing Role: Secondary configuration store backed up during power-down; must retain data for ≥10 years with zero annual failure rate under shelf-life conditions. Use Value: 10-year data retention and industrial temperature rating (-40°C to +85°C) satisfy IEC 62304 Class C software safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar paged parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PU | 5V-only supply (4.5–5.5V), 150 ns access, 256 Kbit (32K × 8), no SDP - requires external 5V rail and lacks hardware write inhibit. | Suitable only in legacy 5V systems; cannot replace AT28LV010-20PI in 3.3V designs without level-shifting or regulator changes. | Select when upgrading from 27C256 and 5V infrastructure is fixed; avoid for new 3.3V designs due to supply incompatibility. |
| MX28LV160CTC-20G | 3.3V supply, 200 ns access, 16 Mbit (2M × 8), boot-block architecture, top/bottom boot sectors - larger capacity but different sector protection model. | Used in flash-based boot loaders; lacks true EEPROM byte-write capability and requires erase-before-write for sectors. | Choose for higher-density firmware storage where block erase tolerance is acceptable; not a functional substitute for true EEPROM random-write behavior. |
Compared with AT28C256-15PU and MX28LV160CTC-20G, the AT28LV010-20PI uniquely combines 3.3V operation, JEDEC pin compatibility, true byte/page random write, and integrated hardware/software write protection - making it the only option for drop-in upgrades of 27C010 in industrial 3.3V systems requiring guaranteed data integrity.
Availability
AT28LV010-20PI is available at Aetrix Electronics and suitable for industrial PLC configuration storage, firmware boot memory for 8-bit MCUs, and field-upgradeable sensor calibration data requiring stable component supply and long-term obsolescence management.
Supply support for AT28LV010-20PI 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, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT28LV010 belongs to Atmel's low-voltage parallel EEPROM product line, designed specifically to replace obsolete 5V EPROMs and EEPROMs in industrial control systems while maintaining pin and function compatibility under 3.3V operation.
FAQ
What is the operating voltage range for AT28LV010-20PI?
The AT28LV010-20PI operates from a single 3.3V supply with a tolerance of ±10%, meaning it functions reliably between 2.97V and 3.63V. This eliminates the need for separate 5V rails or level translators in modern 3.3V system designs, and its internal power-on delay prevents writes during power ramp-up - a key reliability feature confirmed in the Absolute Maximum Ratings and DC Characteristics sections of the datasheet.
Does AT28LV010-20PI support true byte-level writes or only page writes?
The AT28LV010-20PI supports both true byte-level writes and 1–128-byte page writes. While the internal architecture uses a 128-byte page register for efficiency, the device allows individual byte programming by asserting the correct address and data with valid WE/CE timing. Each byte write still requires the full SDP command sequence, and the 10 ms maximum write cycle applies per operation - whether writing one byte or a full page.
How is end-of-write detection implemented in AT28LV010-20PI?
The AT28LV010-20PI provides two independent end-of-write detection methods: DATA polling on I/O7 (which returns the complement of the last written byte until completion) and TOGGLE BIT on I/O6 (which alternates logic states during programming and stabilizes upon completion). Both methods are fully asynchronous and can be polled at any time during the internal 10 ms write cycle - no fixed delay or external timer is required for host firmware implementation.
Is AT28LV010-20PI pin-compatible with older 27-series EPROMs?
Yes, the AT28LV010-20PI features a JEDEC-approved byte-wide pinout identical to the 27C010 and 27C020 EPROMs in 32-pin PDIP packages. Pin-for-pin mapping includes A0–A16, I/O0–I/O7, CE, OE, WE, VCC, and GND - enabling direct PCB replacement without layout modification. However, unlike 27-series devices, AT28LV010-20PI requires no external 12V programming voltage and uses software-controlled write enable instead of hardware VPP.
What is the endurance and data retention specification for AT28LV010-20PI?
The AT28LV010-20PI is rated for 100,000 write/erase cycles and guarantees 10 years of data retention at temperatures ranging from −40°C to +85°C. These values are measured and specified in the "High Reliability CMOS Technology" section of the datasheet and reflect actual characterization results - not typical or best-case estimates. The device achieves this using internal error correction and optimized charge-trapping oxide layers inherent to Atmel's nonvolatile process.
AT28LV010-20PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 200 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT28LV010-20PI FAQ
1.How can I place an order for AT28LV010-20PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28LV010-20PI 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 AT28LV010-20PI reliable?
The price and inventory of AT28LV010-20PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28LV010-20PI is usually 5 days.
3.What payment methods are accepted for AT28LV010-20PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28LV010-20PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28LV010-20PI?
AT28LV010-20PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28LV010-20PI 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 AT28LV010-20PI?
For technical support, including AT28LV010-20PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28LV010-20PI requirements.
6.How does Aetrix verify that AT28LV010-20PI is sourced from the original manufacturer or authorized distributors?
All AT28LV010-20PI 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 AT28LV010-20PI meets industry standards.
7.What is the process for return or replacement of AT28LV010-20PI?
All AT28LV010-20PI units undergo pre-shipment inspection (PSI). If there is an issue with AT28LV010-20PI, 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 AT28LV010-20PI part is unused and in its original packaging.
Return procedure for AT28LV010-20PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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