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Microchip Technology AT28C010-12JU-T
- Part No.:
- AT28C010-12JU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT28C010-12JU-T.pdf
- Description:
- IC EEPROM 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,478
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Product details
Overview
AT28C010-12JU-T from Microchip Technology is a 1-Mbit (128K × 8) paged parallel EEPROM with 120 ns read access time, JEDEC-standard byte-wide pinout, and industrial temperature range (–40°C to +85°C). It operates from a single 5V ±10% supply, supports hardware/software data protection, and delivers up to 100,000 write cycles with 10-year data retention - used in firmware storage, configuration memory, and boot code retention for embedded controllers.
For engineers reviewing the AT28C010-12JU-T datasheet, AT28C010-12JU-T pinout, AT28C010-12JU-T application, or AT28C010-12JU-T equivalent, key selection criteria include page-write capability (1–128 bytes), DATA Polling/Toggle Bit write completion detection, CMOS/TTL compatibility, 32-lead PLCC package, and industrial-grade reliability for legacy system upgrades and long-lifecycle designs.
Technical Context
The AT28C010-12JU-T implements a paged architecture with a 128-byte internal latch, enabling simultaneous write of up to 128 bytes per internal programming cycle. Its dual-line control logic (CE/OE/WE) allows SRAM-like read/write timing without external sequencing logic.
It integrates VCC-sense and power-on delay circuitry to inhibit writes during brown-out conditions, plus noise filtering on CE/WE inputs (rejects <15 ns pulses). The device supports software data protection via a 3-byte command sequence and includes 128 bytes of dedicated identification memory accessible at 1FF80H–1FFFFH using A9 = 12V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8 bits); provides sufficient space for BIOS/UEFI firmware images or multi-parameter calibration tables in industrial controllers. |
| Read Access Time | 120 ns max; enables direct replacement of SRAM or faster EPROMs in legacy 8-bit microcontroller bus systems without wait-state insertion. |
| Page Write Cycle | ≤10 ms; reduces firmware update time by 128× vs. byte-write mode, critical for field-programmable devices with constrained host CPU bandwidth. |
| Write Endurance | 100,000 cycles (E-grade); supports frequent reconfiguration in programmable logic controllers (PLCs) and test equipment calibration storage. |
| Supply Voltage | 5V ±10%; compatible with legacy 5V TTL/CMOS logic families and eliminates need for level-shifting in retrofitted designs. |
| Operating Temperature | –40°C to +85°C; qualified for industrial automation, automotive body-control modules, and outdoor telecom infrastructure. |
| Standby Current | 200 µA (CMOS); enables low-power operation in battery-backed systems where EEPROM retains settings during sleep modes. |
Pinout & Package
AT28C010-12JU-T is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC) with JEDEC-standard byte-wide pinout. Pin 1 is "Don't Connect" (NC), and the package features matte tin (Sn) terminal finish per J-STD-609 for RoHS compliance.
| 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 page writes. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K family buses; supports true read/write without direction control pins. |
| CE | Chip Enable | Active-low chip select; must be stable ≥50 ns before read access to avoid data corruption; enables bus sharing in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention; high-Z state prevents conflicts during write cycles. |
| WE | Write Enable | Active-low write strobe; falling edge latches address/data; supports both byte and page write initiation depending on timing sequence. |
| VCC / GND | Power Supply | Single 5V supply with 200 µA standby current; no separate VPP required - simplifies PCB layout and power design. |
| NC (Pin 1) | No Connect | Unused pin per PLCC package definition; must remain unconnected to ensure correct operation and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Page Write | Internal 128-byte latch and timer eliminate host-side write-loop overhead - reduces firmware update time from seconds to milliseconds. |
| DATA Polling & Toggle Bit | Dual asynchronous write-completion detection (I/O7 complement, I/O6 toggle) enables non-blocking host polling without fixed delays or timers. |
| Hardware Write Inhibit | VCC sense (<3.8V), 5 ms power-on delay, and noise filtering prevent spurious writes during power-up/down or EMI events. |
| Software Data Protection | User-configurable 3-byte command lock (AAh/55h/A0h) prevents accidental overwrites - essential for field-deployed systems with remote updates. |
| Device Identification Memory | Dedicated 128-byte EEPROM region (1FF80H–1FFFFH) accessible via 12V on A9 - supports unique serial number, calibration data, or revision tracking. |
Applications
| Industrial PLC Configuration Storage | Legacy Embedded System Boot Code Retention |
|---|---|
|
Use Scenario: Storing ladder logic parameters, I/O mapping, and alarm thresholds in programmable logic controllers subject to frequent field reconfiguration. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via parallel bus during startup and runtime; requires 100K endurance and industrial temp stability. Use Value: Enables secure, fast page writes (≤10 ms) and software protection to prevent corruption during power glitches in factory-floor environments. |
Use Scenario: Holding boot firmware for 8-bit microcontrollers (e.g., 8051, PIC18) in medical diagnostic instruments where firmware updates occur infrequently but must be highly reliable. IC Role / Device Role / Timing Role: Primary boot ROM replacement; accessed during cold start with 120 ns read latency to minimize boot time. Use Value: 10-year data retention and 100K-cycle endurance ensure firmware integrity across instrument lifetime without recalibration or service intervention. |
| Automotive Body Control Module Calibration | Test Equipment Calibration Data Archive |
|
Use Scenario: Storing sensor offset compensation values and actuator trim settings in vehicle door modules exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Calibration parameter store written once per production line and read at every power-on; requires –40°C to +85°C operation. Use Value: Industrial-grade temperature rating and hardware write-inhibit circuitry prevent data corruption during vehicle battery transients or thermal shock. |
Use Scenario: Archiving calibration coefficients and date stamps for benchtop oscilloscopes and signal generators undergoing periodic NIST traceable recalibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for calibration metadata; accessed only during maintenance mode via dedicated service interface. Use Value: Software data protection (SDP) and 128-byte ID memory allow authenticated calibration records with unique device binding and revision history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C010-15JU-T | Slower 150 ns read access; identical pinout, endurance, and feature set. | Suitable where timing margin permits relaxed access time; lower cost in volume for non-critical timing paths. | Select when system bus speed allows 150 ns latency and cost optimization is prioritized over maximum throughput. |
| AT28C010-12TU-T | Same 120 ns speed and functionality, but in 32-lead TSOP package (8 × 20 mm) instead of PLCC. | Required for space-constrained PCB layouts; lacks PLCC's mechanical robustness and socket compatibility. | Choose for high-density SMT designs where footprint reduction outweighs serviceability and thermal mass requirements. |
Compared with AT28C010-15JU-T, the AT28C010-12JU-T delivers tighter timing for faster boot and configuration loads; versus AT28C010-12TU-T, it offers superior thermal cycling reliability and socket-based field replacement - making it optimal for repairable industrial hardware.
Availability
AT28C010-12JU-T is available at Aetrix Electronics and suitable for industrial PLCs, legacy embedded system upgrades, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT28C010-12JU-T 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on long-lifecycle, industrial-grade components.
The AT28C010 belongs to Microchip's parallel EEPROM product line, designed specifically for drop-in replacement of obsolete EPROMs and SRAM-backed NV memory in legacy 8/16-bit systems requiring high reliability and JEDEC-compliant interfaces.
FAQ
What is the maximum page write size supported by the AT28C010-12JU-T?
The AT28C010-12JU-T supports page writes of 1 to 128 bytes within a single internal programming cycle. Each byte must be loaded within 150 µs of the previous one, and all addresses must reside on the same page (defined by A7–A16). This capability is implemented in hardware and requires no external timing control - the AT28C010-12JU-T handles latching and internal timing autonomously.
Does the AT28C010-12JU-T require a high-voltage programming supply (VPP)?
No, the AT28C010-12JU-T operates from a single 5V ±10% supply and does not require an external VPP voltage. All write operations - including byte, page, and chip erase - are performed using standard 5V logic levels. The only exception is the optional device identification memory region (1FF80H–1FFFFH), which requires 12V on A9 for access, but this is not used for main array programming.
How does DATA Polling work on the AT28C010-12JU-T during a write cycle?
During a write cycle, reading the last-written address returns the complement of the data on I/O7 until the internal programming completes. Once valid data appears on I/O7, the write is finished. This allows the host to poll I/O7 asynchronously without fixed delays - a key feature of the AT28C010-12JU-T that simplifies firmware design and improves system responsiveness.
Is the AT28C010-12JU-T pin-compatible with older Atmel AT28C series devices?
Yes, the AT28C010-12JU-T maintains JEDEC-approved byte-wide pinout compatibility with prior AT28C010 variants, including Atmel-era versions. Pin functions, timing behavior, and electrical characteristics match across the family - enabling direct replacement in existing PCBs without layout changes, provided the 32-lead PLCC footprint is used.
What is the purpose of the 128-byte device identification memory in the AT28C010-12JU-T?
The AT28C010-12JU-T includes 128 bytes of dedicated EEPROM at addresses 1FF80H–1FFFFH, accessible only when A9 is raised to 12V ±0.5V. This region is intended for storing unique device identifiers, calibration constants, manufacturing lot codes, or firmware version stamps - providing traceability and customization without consuming main array memory.
AT28C010-12JU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
AT28C010-12JU-T FAQ
1.How can I place an order for AT28C010-12JU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28C010-12JU-T 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 AT28C010-12JU-T reliable?
The price and inventory of AT28C010-12JU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28C010-12JU-T is usually 5 days.
3.What payment methods are accepted for AT28C010-12JU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28C010-12JU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28C010-12JU-T?
AT28C010-12JU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28C010-12JU-T 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 AT28C010-12JU-T?
For technical support, including AT28C010-12JU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28C010-12JU-T requirements.
6.How does Aetrix verify that AT28C010-12JU-T is sourced from the original manufacturer or authorized distributors?
All AT28C010-12JU-T 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 AT28C010-12JU-T meets industry standards.
7.What is the process for return or replacement of AT28C010-12JU-T?
All AT28C010-12JU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT28C010-12JU-T, 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 AT28C010-12JU-T part is unused and in its original packaging.
Return procedure for AT28C010-12JU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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