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Microchip Technology AT49F001T-55JC
- Part No.:
- AT49F001T-55JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001T-55JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,705
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Product details
Overview
AT49F001T-55JC from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC with 55 ns read access time, sector-based architecture (16K boot block + two 8K parameter blocks + 96K main memory), and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F001T-55JC datasheet, AT49F001T-55JC pinout, AT49F001T-55JC application, or AT49F001T-55JC equivalent, key selection considerations include its PLCC-32 package, 5V single-supply operation, boot block lockout capability, DATA polling/Toggle Bit programming status detection, and compatibility with standard EPROM read timing interfaces.
Technical Context
The AT49F001T-55JC implements a command-register-based architecture for erase and program operations using six-byte software sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h → …). Its memory map places the 16K boot block at address range 1C000h–1FFFFh, distinct from the AT49F001(N) variant's 00000h–03FFFh layout.
It supports byte-by-byte programming (10 µs typical), sector erase (10 s max), and chip erase - all internally timed with no external clocks required. Hardware protection includes VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line gating (OE low / CE high / WE high disables writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces EPROMs in 8-bit bus systems. |
| Read Access Time | 55 ns max - enables direct interface with 12–18 MHz microcontrollers without wait states. |
| Supply Voltage | 5.0 V ±10% - single-rail operation eliminates need for 12 V programming supplies. |
| Active Current | 50 mA typical - compatible with standard 5 V logic power budgets. |
| Standby Current | 100 µA CMOS (commercial temp) - suitable for low-power embedded sleep modes. |
| Erase Cycle Time | 10 seconds max (full chip or sector) - deterministic timing simplifies host firmware timeout handling. |
| Endurance | 10,000 write/erase cycles - validated for frequent field firmware updates over product lifetime. |
| Data Retention | 20 years at 85°C - meets industrial-grade reliability requirements for unattended operation. |
Pinout & Package
AT49F001T-55JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with dimensions 12.5 mm × 15.1 mm × 3.5 mm (max height). Pin 1 identifier is a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 used only for addresses ≥128K (e.g., boot block at 1C000h). |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K families; high-impedance when CE or OE inactive. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output control; allows data gating independent of CE - essential for multiplexed bus arbitration. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing - enables standard microprocessor write cycles. |
| RESET | Reset Input | Active-low reset halts ongoing operations and forces high-Z outputs; 12 V override enables boot block reprogramming after lockout. |
| VCC | Power Supply | +5 V supply pin; decoupling capacitor required within 1 cm to maintain stable read/write margins. |
| GND | Ground | Signal reference; separate ground plane recommended to minimize noise coupling during erase/program pulses. |
| NC | No Connect | Pin 32 (PLCC) is unconnected - must remain floating; not usable as spare I/O or ground. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K boot block (1C000h–1FFFFh) can be permanently write-protected via command sequence - ensures bootloader integrity during field updates. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line gating prevent accidental writes - eliminates need for external write-protection logic or firmware guards. |
| DATA Polling & Toggle Bit Status Detection | I/O7 complement and I/O6 toggling provide real-time, bus-compatible program/erase completion signals - removes dependency on fixed timing delays in host code. |
| 5V-Only Reprogrammability | No external high-voltage generator required - simplifies PCB design and reduces BOM cost versus EPROM or older Flash devices. |
| Standard EPROM-Compatible Read Interface | CE/OE/WE timing matches industry-standard EPROMs - enables drop-in replacement without modifying existing memory controller logic. |
| Industrial Temperature Range Support | Rated for –40°C to +85°C operation (industrial grade variants exist) - suitable for automotive body control, industrial HMIs, and outdoor equipment. |
Applications
| Embedded Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing boot code and application firmware for 8-bit microcontrollers in factory automation controllers. IC Role / Device Role / Timing Role: Nonvolatile program memory with 55 ns read access enabling zero-wait-state execution from internal ROM shadow or direct XIP. Use Value: Boot block lockout prevents corruption of startup routines during remote firmware updates over Modbus RTU. |
Use Scenario: Holding user-configurable I/O mapping tables and calibration parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Parameter storage block (two 8K sections) accessible via standard memory-mapped writes during runtime configuration. Use Value: Sector-erase capability allows individual parameter block updates without disturbing firmware or other configuration data. |
| Medical Device Calibration Data | Telecom Line Card Boot Image |
Use Scenario: Retaining sensor calibration coefficients and safety-critical operational limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant data storage with hardware write protection and 20-year data retention at 85°C. Use Value: RESET-pin 12 V override enables authorized recalibration in service mode while maintaining lockout during normal operation. |
Use Scenario: Hosting boot images for DSP-based line cards in carrier-class DSLAMs and optical network terminals. IC Role / Device Role / Timing Role: High-reliability Flash memory interfaced to TI C6000 or Analog Devices SHARC processors via EMIF. Use Value: 10,000-cycle endurance supports frequent field upgrades across multi-year deployment lifecycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-55-4C-NHE | 3.3 V core (5 V tolerant I/O), 55 ns access, 1 Mbit, PLCC-32; lacks boot block lockout and RESET override. | Requires level-shifting for pure 5 V systems; no hardware-protected boot region - relies on software-only protection schemes. | Select when migrating to lower-power 3.3 V designs and boot security is managed in firmware. |
| MX29LV160CBTI-70G | 3.0 V supply, 70 ns access, 16 Mbit density, TSOP-48; boot block at top/bottom, no 12 V RESET override. | Higher density but incompatible pinout and voltage; requires PCB redesign and firmware adaptation for sector addressing. | Choose for new designs needing >1 Mbit capacity and 3 V operation - not a drop-in replacement. |
Compared with SST39VF010-55-4C-NHE and MX29LV160CBTI-70G, the AT49F001T-55JC uniquely delivers 5 V-only operation with hardware-enforced boot block protection and 12 V RESET override - critical for legacy 5 V industrial systems requiring field-serviceable secure boot.
Availability
AT49F001T-55JC is available at Aetrix Electronics and suitable for embedded firmware storage, industrial PLC configuration memory, medical device calibration data retention, and telecom line card boot image hosting requiring stable component supply across extended production lifecycles.
Supply support for AT49F001T-55JC 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 the AT49F001 family. The company specializes in microcontrollers, analog, Flash memory, and security ICs.
The AT49F001T series belongs to Atmel's 5V Flash memory product line, designed specifically for in-system reprogrammability in cost-sensitive, 5 V-based embedded systems where EPROM replacement and field firmware updates are required.
FAQ
What is the boot block address range for AT49F001T-55JC?
The boot block for AT49F001T-55JC occupies address range 1C000h to 1FFFFh (16 Kbytes). This differs from the base AT49F001(N) variant, which locates the boot block at 00000h–03FFFh. The AT49F001T-55JC's upper-address boot block placement facilitates separation from main application code in larger memory maps.
Does AT49F001T-55JC support 3.3 V operation?
No, AT49F001T-55JC is strictly a 5 V-only device. Its DC specifications require VCC = 5.0 V ±10%, and it lacks 3.3 V core logic or I/O tolerance. Attempting 3.3 V operation will result in undefined behavior, failed reads, and inability to execute command sequences. Use SST39VF010 or similar for 3.3 V systems.
How is boot block programming lockout enabled on AT49F001T-55JC?
Boot block lockout on AT49F001T-55JC is enabled by executing a six-cycle command sequence: write AAh to 5555h, 55h to 2AAAh, 80h to 5555h, AAh to 5555h, 55h to 2AAAh, then 40h to 5555h. Once confirmed, the boot block (1C000h–1FFFFh) becomes permanently protected against erasure or programming at ≤5.5 V.
Can the boot block of AT49F001T-55JC be reprogrammed after lockout is enabled?
Yes - the AT49F001T-55JC supports 12 V override on the RESET pin to temporarily disable boot block protection. Applying 12.0 V ±0.5 V to RESET allows chip erase, sector erase, or byte programming of the locked boot block. Upon return to TTL levels, lockout re-engages automatically.
What package type is used for AT49F001T-55JC?
AT49F001T-55JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering guide. Its footprint conforms to JEDEC MS-016, Variation AE, with pin 1 identified by a corner chamfer and body dimensions of 12.5 mm × 15.1 mm × 3.5 mm max height.
AT49F001T-55JC 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 55 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)
AT49F001T-55JC FAQ
1.How can I place an order for AT49F001T-55JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001T-55JC 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 AT49F001T-55JC reliable?
The price and inventory of AT49F001T-55JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001T-55JC is usually 5 days.
3.What payment methods are accepted for AT49F001T-55JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001T-55JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001T-55JC?
AT49F001T-55JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001T-55JC 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 AT49F001T-55JC?
For technical support, including AT49F001T-55JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001T-55JC requirements.
6.How does Aetrix verify that AT49F001T-55JC is sourced from the original manufacturer or authorized distributors?
All AT49F001T-55JC 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 AT49F001T-55JC meets industry standards.
7.What is the process for return or replacement of AT49F001T-55JC?
All AT49F001T-55JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001T-55JC, 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 AT49F001T-55JC part is unused and in its original packaging.
Return procedure for AT49F001T-55JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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