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Microchip Technology AT49F008AT-12TC
- Part No.:
- AT49F008AT-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F008AT-12TC.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 40TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:107
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Product details
Overview
AT49F008AT-12TC from Atmel is an 8-megabit (1,048,576 × 8-bit) top-boot flash memory IC with 5V single-voltage operation, 120 ns read access time, and sector-erase architecture comprising one 8K-word boot block, two 4K-word parameter blocks, and one 496K-word main memory array. It supports byte/word programming in 10 µs typical, features hardware data protection, DATA polling, and READY/BUSY signaling, and is used in embedded system firmware storage where secure boot code retention is required.
For engineers reviewing the AT49F008AT-12TC datasheet, AT49F008AT-12TC pinout, AT49F008AT-12TC application, or AT49F008AT-12TC equivalent, key selection considerations include top-boot sector layout (FC000H–FFFFFH), TSOP-40 package compatibility, 5V-only interface timing, CMOS standby current of 300 µA, and boot block lockout override via 12V RESET input.
Technical Context
The AT49F008AT-12TC implements a command-register-based architecture requiring six-bus-cycle sequences for chip/sector erase and boot lockout enable, with address latching on falling CE/WE edges and data latching on rising edges. Its internal erase/program control eliminates external high-voltage circuitry, and the RDY/BUSY open-drain output enables multi-device synchronization during nonvolatile operations.
It operates in standard EPROM-compatible read mode (CE/OE low, WE high) and supports both byte and word configurations via the BYTE pin. The top-boot configuration places the protected boot block at highest addresses (FC000H–FFFFFH), enabling secure bootloader storage while allowing field updates to application code in the main memory array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 × 8-bit or 512K × 16-bit) |
| Read Access Time | 120 ns - determines maximum bus clock rate in microcontroller interfaces |
| Supply Voltage | 5 V ±10% - single-rail operation eliminates need for charge pumps or voltage translators |
| Active Current | 50 mA - defines power budget during firmware reads or active programming |
| Standby Current | 300 µA CMOS - enables low-power retention in battery-backed systems |
| Erase Time | 10 seconds typical per sector - impacts firmware update latency in field-deployed devices |
| Programming Time | 10 µs typical per byte/word - supports fast in-system reprogramming without host CPU stalls |
| Endurance | 10,000 write/erase cycles - qualifies for long-life industrial firmware storage applications |
Pinout & Package
AT49F008AT-12TC is packaged in a 40-lead Plastic Thin Small Outline Package (TSOP Type I), 10.16 mm × 13.10 mm body, 0.5 mm lead pitch. Pin 1 marked with white dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 1M-word addressing space |
| CE | Chip Enable | Active-low chip select; must be low with OE low for valid read access |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention |
| WE | Write Enable | Active-low signal initiating command latching and programming/erase cycles |
| RESET | Reset Input | Active-low reset; 12V input overrides boot block lockout during erase/program |
| RDY/BUSY | Ready/Busy Output | Open-drain status indicator; pulled low during internal program/erase operations |
| I/O0–I/O7 | Data I/O (Byte Mode) | 8-bit bidirectional data bus when BYTE = logic 0 |
| I/O0–I/O15 | Data I/O (Word Mode) | 16-bit bidirectional data bus when BYTE = logic 1 or floating |
| BYTE | Mode Select | Configures data bus width; logic 0 = byte mode (I/O0–I/O7 active), logic 1/floating = word mode |
| GND / VCC | Power Supply | Two GND pins (pins 20, 40); single 5V supply (pin 31) |
Key Features
| Feature | Design Value |
|---|---|
| Top-boot sector architecture | Boot block located at FC000H–FFFFFH enables secure bootloader placement at highest memory addresses |
| Hardware boot block lockout | Prevents accidental overwrite of boot code; enabled via 6-cycle command sequence; overridden only by 12V RESET |
| Embedded erase/program control | Eliminates need for external high-voltage generators or timing circuits during firmware updates |
| DATA polling & toggle bit | Allows host MCU to detect completion of program/erase without polling RDY/BUSY pin |
| Standard EPROM-compatible interface | Uses CE/OE/WE control signals identical to parallel EPROMs, simplifying legacy design migration |
| CMOS standby power | 300 µA max current enables use in always-on embedded controllers with strict power budgets |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and boot code in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with top-boot protection ensuring bootloader integrity across thousands of field updates. Use Value: 10,000-cycle endurance and -40°C to +85°C industrial grade operation ensure long-term reliability without recalibration or replacement. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in FDA-regulated diagnostic equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write protection preventing unauthorized modification of startup code. Use Value: Boot block lockout override via 12V RESET allows authorized service personnel to recover corrupted boot sectors without board removal. |
| Telecom Base Station Configuration | Automotive Infotainment System Flash |
Use Scenario: Storing configuration tables and calibration data in 4G/5G remote radio units exposed to thermal cycling and EMI. IC Role / Device Role / Timing Role: Parameter block storage (two 4K-word sections) for field-updatable calibration parameters independent of main firmware. Use Value: Sector-erase granularity enables updating calibration data without erasing entire firmware image, reducing downtime during maintenance. |
Use Scenario: Embedded firmware storage in automotive head units requiring AEC-Q100-compliant components and secure boot verification. IC Role / Device Role / Timing Role: Top-boot flash memory holding verified bootloader that validates subsequent application code before execution. Use Value: 120 ns read access meets real-time boot timing requirements while 5V-only interface simplifies power domain design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF080-70-4C-NHE | 8 Mbit, 70 ns access, bottom-boot, 3.3V operation | Requires level-shifting for 5V systems; lacks 12V RESET override for boot lockout | Select if migrating to lower-voltage platform and boot block location is not critical |
| MX29LV800CTTI-90G | 8 Mbit, 90 ns access, top-boot, 3.0–3.6V operation | Not 5V-tolerant; incompatible with direct 5V bus interfacing without translation | Choose only when redesigning for 3.3V core logic and faster access is prioritized over voltage compatibility |
Compared with SST39VF080-70-4C-NHE and MX29LV800CTTI-90G, the AT49F008AT-12TC uniquely supports 5V-only operation with top-boot layout and hardware-overrideable boot protection-critical for legacy 5V embedded systems requiring secure, field-upgradable firmware storage without voltage translation or PCB redesign.
Availability
AT49F008AT-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, telecom base station configuration, and automotive infotainment system flash requiring stable component supply across extended product lifecycles.
Supply support for AT49F008AT-12TC 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 security ICs for embedded applications.
The AT49F008AT-12TC belongs to Atmel's parallel-interface flash memory product line, designed specifically for 5V embedded systems requiring secure, in-system reprogrammable firmware storage with hardware-enforced boot code protection.
FAQ
What does the "T" suffix in AT49F008AT-12TC indicate?
The "T" in AT49F008AT-12TC denotes top-boot configuration, meaning the 8K-word boot block resides at the highest address range (FC000H–FFFFFH). This contrasts with the bottom-boot AT49F008A-12TC (00000H–03FFFH). The AT49F008AT-12TC maintains identical timing, packaging, and electrical specs but provides different boot sector placement for system-level bootloader architecture decisions.
Does AT49F008AT-12TC require external high voltage for programming?
No, AT49F008AT-12TC uses single 5V supply for both read and programming operations. All erase and program functions are internally controlled via command sequences written to specific addresses. The AT49F008AT-12TC eliminates need for external 12V programming supplies, simplifying system design and reducing BOM cost compared to older EPROM or UV-erasable devices.
How is boot block protection enabled and overridden on AT49F008AT-12TC?
Boot block protection on AT49F008AT-12TC is enabled via a six-cycle command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once enabled, writes to FC000H–FFFFFH are blocked at ≤5.5V. Override requires applying 12V ±0.5V to the RESET pin during erase/program cycles-this is the only method to reprogram the locked boot block in AT49F008AT-12TC.
What package type and pin count does AT49F008AT-12TC use?
AT49F008AT-12TC uses a 40-lead Plastic Thin Small Outline Package (TSOP Type I), with 10.16 mm × 13.10 mm body size and 0.5 mm lead pitch. Pin 1 is marked with a white dot. This TSOP-40 footprint is compatible with standard surface-mount assembly processes and widely supported by legacy PCB layouts designed for parallel flash memory.
Can AT49F008AT-12TC operate in both byte and word modes?
Yes, AT49F008AT-12TC supports configurable data bus width via the BYTE pin. When BYTE = logic 0, it operates in 8-bit byte mode (I/O0–I/O7 active). When BYTE = logic 1 or left floating, it operates in 16-bit word mode (I/O0–I/O15 active). This flexibility allows the same AT49F008AT-12TC device to interface with either 8-bit or 16-bit microcontroller buses without hardware changes.
AT49F008AT-12TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-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:
- 8Mbit
- Memory Organization:
- 1M x 8, 512K x 16
- 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:
- 40-TSOP
AT49F008AT-12TC FAQ
1.How can I place an order for AT49F008AT-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F008AT-12TC 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 AT49F008AT-12TC reliable?
The price and inventory of AT49F008AT-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F008AT-12TC is usually 5 days.
3.What payment methods are accepted for AT49F008AT-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F008AT-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F008AT-12TC?
AT49F008AT-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F008AT-12TC 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 AT49F008AT-12TC?
For technical support, including AT49F008AT-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F008AT-12TC requirements.
6.How does Aetrix verify that AT49F008AT-12TC is sourced from the original manufacturer or authorized distributors?
All AT49F008AT-12TC 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 AT49F008AT-12TC meets industry standards.
7.What is the process for return or replacement of AT49F008AT-12TC?
All AT49F008AT-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F008AT-12TC, 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 AT49F008AT-12TC part is unused and in its original packaging.
Return procedure for AT49F008AT-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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