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Microchip Technology AT49F002T-12JC
- Part No.:
- AT49F002T-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F002T-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,568
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Product details
Overview
AT49F002T-12JC from Microchip Technology (formerly Atmel) is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC used for nonvolatile program/data storage in embedded controllers and boot code applications. It features 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, sector architecture with 16K-byte boot block (address range 3C000–3FFFF), and hardware data protection including VCC sense and noise filtering.
For engineers reviewing the AT49F002T-12JC datasheet, AT49F002T-12JC pinout, AT49F002T-12JC application, or AT49F002T-12JC equivalent, key selection considerations include its PLCC-32 package, industrial temperature range (−40°C to +85°C), boot block lockout override via 12V RESET, DATA polling/toggle bit end-of-program detection, and compatibility with standard microprocessor bus timing.
Technical Context
The AT49F002T-12JC implements a command-based Flash architecture requiring six-byte sequences for chip/sector erase and boot lockout enable. Its sector map includes one 16K-byte boot block (3C000–3FFFF), two 8K-byte parameter blocks (3A000–3BFFF, 38000–39FFF), and two main memory blocks (20000–37FFF and 00000–1FFFF).
Operation relies on standard CE/OE/WE control logic identical to EPROMs, with internal program timers and automatic pulse generation. The RESET pin supports both reset functionality and 12V override of boot block protection - a feature absent in the AT49F002N(T) variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 120 ns max - defines minimum bus cycle duration for reliable read operations |
| Byte Programming Time | 10 µs typical - enables rapid field updates without external timing circuitry |
| Chip Erase Time | 10 seconds - full-device erase completes autonomously after command sequence |
| Boot Block Size & Address | 16 Kbytes at 3C000–3FFFF - dedicated secure region for bootloader code |
| Operating Voltage | 5.0 V ±10% - single-supply operation eliminates need for charge pumps or voltage translators |
| Power Dissipation | 275 mW typical active (50 mA @ 5.5 V), 100 µA CMOS standby - suitable for low-power embedded systems |
| Endurance | 10,000 write/erase cycles - validated lifetime for firmware update scenarios |
Pinout & Package
AT49F002T-12JC is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE, with 1.27 mm pitch, 18.5 × 18.3 mm body, and pin 1 index mark. Pin 1 is located at corner adjacent to notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and x86 microcontrollers |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low signal initiating byte programming, sector erase, or command latching |
| RESET | Reset / Boot Override | Logic-high = normal operation; 12V pulse enables boot block reprogramming even when locked |
| VCC | Power Supply | +5V ±10% supply input; internal regulation ensures stable core voltage |
| GND | Ground | Reference return path for all digital and programming currents |
| DC | No Connect | Pin 9 in TSOP/VSOP packages; not bonded in PLCC (32J) - left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | Enables permanent protection of bootloader code in 16K-byte region while allowing field updates to application firmware elsewhere |
| Hardware Data Protection | VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock prevent accidental writes |
| DATA Polling & Toggle Bit | Allows real-time detection of program/erase completion without external timers or status registers |
| 12V RESET Override | Permits recovery of locked boot block via 12V ±0.5V pulse on RESET - critical for firmware rescue operations |
| Standard Microprocessor Timing | Compatible with common 8-bit and 16-bit MCU buses using conventional CE/OE/WE strobes and address/data setup/hold requirements |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot code and parameter storage with guaranteed 10,000-cycle endurance and −40°C to +85°C operation. Use Value: Eliminates need for external EEPROM or battery-backed SRAM; boot block lockout prevents corruption of safety-critical startup routines. | Use Scenario: Holding certified bootloader and calibration data in Class II medical instruments requiring traceable, tamper-resistant firmware storage. IC Role / Device Role / Timing Role: Secure, reprogrammable Flash memory with hardware-enforced boot protection and 12V override for authorized service updates. Use Value: Meets IEC 62304 software lifecycle requirements by enabling controlled, auditable firmware updates without compromising boot integrity. |
| Telecom Base Station Configuration | Automotive Infotainment System BIOS |
Use Scenario: Storing radio configuration profiles, encryption keys, and field-upgradable DSP firmware in cellular base station remote units. IC Role / Device Role / Timing Role: High-reliability Flash memory supporting fast 10 µs/byte programming and 120 ns read for real-time configuration loading. Use Value: Enables over-the-air (OTA) updates with verified sector erase and DATA polling confirmation - reducing downtime during maintenance windows. | Use Scenario: Hosting BIOS and secure boot modules in automotive head units where ECU-level firmware integrity is mandated by ISO 26262 ASIL-B. IC Role / Device Role / Timing Role: Boot block-protected Flash memory with hardware write inhibition and 12V override for dealership-level diagnostics and recovery. Use Value: Prevents unauthorized modification of boot code while permitting OEM-controlled firmware restoration - satisfying automotive cybersecurity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002T-12JI | Same die and pinout, but in PDIP-32 package instead of PLCC-32; no DC pin; different thermal profile and board mounting | Preferred for through-hole prototyping or legacy PCBs; lacks PLCC's surface-mount reliability in vibration-prone environments | Select AT49F002T-12JI only if DIP footprint is required and mechanical robustness is secondary to ease of hand-soldering. |
| SST39VF020-90-4C-NHE | 4 Mbit (512K × 8), 90 ns access, 3.3 V operation; no 12V RESET override; different command set and sector layout | Requires level-shifting for 5V systems; lacks boot lockout override - unsuitable for safety-critical recovery paths | Choose SST39VF020 only when higher density and lower voltage are mandatory, and boot block recovery is handled externally. |
Compared with AT49F002T-12JI and SST39VF020-90-4C-NHE, the AT49F002T-12JC uniquely combines industrial-grade PLCC packaging, 12V boot override, and 5V-only operation - making it optimal for field-serviceable embedded systems requiring guaranteed firmware recovery.
Availability
AT49F002T-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and telecom base station configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F002T-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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products, including manufacturing, documentation, and technical assistance.
The AT49F002T-12JC belongs to Atmel's early-generation 5V Flash memory family, designed specifically for cost-sensitive, in-system reprogrammable applications in industrial control, instrumentation, and communications equipment.
FAQ
What is the maximum operating temperature range for the AT49F002T-12JC?
The AT49F002T-12JC is rated for industrial operation from −40°C to +85°C. This is confirmed by its ordering suffix "I" (as in -12JI) and the "Industrial" designation in the AT49F002T Ordering Information table on page 14 of the datasheet. The "-12" denotes 120 ns access time, and "JC" specifies the PLCC-32 package.
Does the AT49F002T-12JC support boot block protection, and how is it enabled?
Yes, the AT49F002T-12JC supports boot block programming lockout for its 16K-byte region (3C000–3FFFF). It is enabled via a six-cycle command sequence: load AA to 5555H, 55 to 2AAAH, 80 to 5555H, then AA/55/40 to 5555H/2AAAH/5555H. Once activated, programming is blocked at ≤5.5 V - only a 12V pulse on RESET can override it.
Can the AT49F002T-12JC be used in a 5V microcontroller system without level shifters?
Yes, the AT49F002T-12JC operates exclusively at 5V ±10% and uses TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and outputs (VOH ≥ 2.4 V, VOL ≤ 0.45 V). It interfaces directly with 8051, 68HC11, Z8, and other 5V microcontrollers without level translation.
How is end-of-program detection implemented in the AT49F002T-12JC?
The AT49F002T-12JC provides two hardware methods: DATA polling (I/O7 returns complement of written data until complete, then true data) and Toggle Bit (I/O6 toggles during operation and stabilizes upon completion). Both require no external components and work with any address location.
Is the RESET pin on the AT49F002T-12JC functional for both reset and boot override?
Yes - the RESET pin serves dual roles. At logic-high (≤5.5 V), it places the device in standard read/standby mode. When pulsed to 12.0 V ±0.5 V, it overrides the boot block lockout feature, enabling chip/sector erase or byte programming of the protected 3C000–3FFFF region - a capability not present in the AT49F002N(T) variant.
AT49F002T-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:
- 50µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F002T-12JC FAQ
1.How can I place an order for AT49F002T-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002T-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 AT49F002T-12JC reliable?
The price and inventory of AT49F002T-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002T-12JC is usually 5 days.
3.What payment methods are accepted for AT49F002T-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002T-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002T-12JC?
AT49F002T-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002T-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 AT49F002T-12JC?
For technical support, including AT49F002T-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002T-12JC requirements.
6.How does Aetrix verify that AT49F002T-12JC is sourced from the original manufacturer or authorized distributors?
All AT49F002T-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 AT49F002T-12JC meets industry standards.
7.What is the process for return or replacement of AT49F002T-12JC?
All AT49F002T-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002T-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 AT49F002T-12JC part is unused and in its original packaging.
Return procedure for AT49F002T-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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