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Microchip Technology AT49F2048A-70TC
- Part No.:
- AT49F2048A-70TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F2048A-70TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,871
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Product details
Overview
AT49F2048A-70TC from Atmel is a 5V-only, 2-Mbit (256K × 8 / 128K × 16) CMOS Flash memory with 70 ns read access time, sector-based erase architecture (including 8K-word boot block with programming lockout), and byte/word programmability. It operates in SOIC-44 package and serves as nonvolatile program storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F2048A-70TC datasheet, AT49F2048A-70TC pinout, AT49F2048A-70TC application, or AT49F2048A-70TC equivalent, key selection criteria include its 70 ns read timing, hardware reset-enabled boot block override, BYTE pin-selectable 8-bit/16-bit bus interface, and sector-erase granularity for secure firmware partitioning.
Technical Context
The AT49F2048A-70TC implements a four-sector Flash architecture: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 112K-word main array. Erase and program operations are fully internal-no external high-voltage or clocks required-and controlled via six-cycle command sequences written to specific address/data latches.
Its dual-mode I/O interface is governed by the BYTE pin: logic high enables 16-bit word mode (I/O0–I/O15 active), while logic low selects 8-bit byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1 LSB address input). RESET supports both TTL-level operation and 12V override to unlock the boot block during reprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8 or 128K × 16 organization) |
| Read Access Time | 70 ns - meets real-time boot code fetch timing in 8/16-bit microcontroller buses |
| Supply Voltage | 5 V ±10% - single-rail compatibility with legacy 5V logic and MCU systems |
| Active Current | 50 mA - supports sustained read bursts without thermal derating in compact PCB layouts |
| Standby Current | 100 µA CMOS - enables low-power retention in battery-backed or sleep-mode applications |
| Erase Time (Sector) | 10 seconds - allows predictable firmware update windows without system timeout risks |
| Programming Time | 50 µs per byte/word - enables fast field patching of small code segments |
| Endurance | 10,000 write/erase cycles - qualifies for industrial firmware update lifecycles |
Pinout & Package
AT49F2048A-70TC is housed in a 44-lead, 0.525" wide plastic gull-wing SOIC (SOP) package (JEDEC MS-012AC), pin-compatible with standard 44-pin SOIC footprints and compatible with wave-solder and reflow assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 256K-byte addressing; A−1 function on I/O15 in byte mode |
| CE | Chip Enable | Active-low chip select enabling memory access only when asserted with OE and WE in correct state |
| OE | Output Enable | Active-low output gate controlling data bus drive; used with CE for read cycle timing control |
| WE | Write Enable | Active-low signal initiating internal command latch and program/erase sequence execution |
| RESET | Hardware Reset | TTL-level reset halts operations and tri-states outputs; 12V input overrides boot block lockout |
| BYTE | Bus Width Select | Logic high = 16-bit word mode (I/O0–I/O15); logic low = 8-bit byte mode (I/O0–I/O7 + A−1 on I/O15) |
| I/O0–I/O14 | Data I/O (Bidirectional) | Core data bus pins; direction and tristate controlled by CE/OE/WE states and BYTE mode |
| I/O15 / A−1 | Configurable Terminal | In word mode: data bit 15; in byte mode: LSB address input (A−1) for 8-bit addressing expansion |
| VCC, GND | Power Supply | Single 5V supply with dedicated ground pins placed to minimize noise coupling in high-speed reads |
| NC | No Connect | Unbonded pins (A7–A9, A11–A13 on TSOP variant not applicable here; SOIC-44 has no NCs per pin map) |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 8K-word (00000H–01FFFH) region permanently protected at ≤5.5V; prevents accidental overwrite of bootloader code |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin unlocks boot block for reprogramming even when lockout is enabled |
| Data Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, software-visible status of ongoing program/erase cycles |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), 10 ms power-on delay, and noise filtering (<15 ns pulses ignored) |
| Sector-Erase Architecture | Four independently erasable sectors enable selective firmware updates without full-chip erase latency |
| Single-Voltage Reprogramming | 5V-only command sequences eliminate need for external VPP generators or voltage translators |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Bootloader Memory |
|---|---|
|
Use Scenario: Storing field-upgradable ladder logic and configuration data in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot firmware and application code, accessed via 8-bit parallel bus during cold start and runtime updates. Use Value: Sector erase enables safe patching of control logic without disrupting operational parameters stored in protected parameter blocks. |
Use Scenario: Hosting secure bootloader code and calibration tables in engine control units where ASAM-compliant flash updates are required. IC Role / Device Role / Timing Role: Boot block-resident trusted code verified before loading main application; BYTE pin configures 16-bit bus for faster flash programming. Use Value: 12V RESET override allows OEM service tools to reflash locked boot sectors during dealership diagnostics and recalibration. |
| Medical Device Configuration Storage | Networking Equipment Parameter Memory |
|
Use Scenario: Retaining FDA-compliant device settings, user preferences, and audit logs in portable diagnostic instruments with battery backup. IC Role / Device Role / Timing Role: Low-power standby mode (100 µA) preserves settings during idle periods; sector architecture isolates critical configuration from firmware updates. Use Value: Hardware data protection ensures settings remain intact during brown-out conditions common in mobile medical equipment. |
Use Scenario: Storing MAC addresses, VLAN tables, and firmware version metadata in managed Ethernet switches undergoing remote firmware upgrades. IC Role / Device Role / Timing Role: Parameter blocks (two 4K-word sections) store volatile network identity data separately from main firmware image. Use Value: Independent sector erase allows updating switch configuration without reprogramming entire firmware image, reducing downtime risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV200BT-70EC | 3V core with 5V I/O tolerance; 70 ns access; 2 Mbit (256K × 8); no boot block lockout | Lacks hardware-enforced boot sector protection and 12V override; requires level-shifting in pure 5V systems | Choose when migrating to lower-voltage systems or when boot block security is not required |
| SST39VF200A-70-4C-NHE | 3.3V-only operation; 70 ns access; 2 Mbit (256K × 8); includes software-controlled block protection | Requires 3.3V supply and may need voltage translation; protection relies on software commands only | Prefer for new 3.3V designs where power efficiency outweighs 5V compatibility and hardware lockout |
Compared with AM29LV200BT-70EC and SST39VF200A-70-4C-NHE, the AT49F2048A-70TC uniquely delivers 5V-native operation with hardware-enforced boot block lockout and 12V-reset override-critical for legacy industrial and automotive systems requiring tamper-resistant firmware staging.
Availability
AT49F2048A-70TC is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostic devices, and networking equipment requiring stable component supply across extended product lifecycles.
Supply support for AT49F2048A-70TC 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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs for embedded and industrial applications.
The AT49F2048A product line delivers 5V-only Flash memory optimized for legacy 8/16-bit microcontroller platforms requiring field-upgradable, sector-protected firmware storage with minimal board-level support circuitry.
FAQ
What is the operating temperature range for the AT49F2048A-70TC?
The AT49F2048A-70TC is rated for commercial operation from 0°C to +70°C. Its SOIC-44 package and internal design meet this specification under continuous read and program conditions with proper PCB thermal management. The "-70TC" suffix explicitly denotes the commercial temperature grade and TSOP-compatible SOIC packaging, distinguishing it from industrial-grade variants like AT49F2048A-70TI.
How does the BYTE pin affect the AT49F2048A-70TC's data interface?
The BYTE pin determines bus width mode: logic high enables 16-bit word operation (I/O0–I/O15 active), while logic low configures 8-bit byte mode (I/O0–I/O7 active, I/O15 becomes A−1 address input). This allows the AT49F2048A-70TC to interface directly with either 8-bit or 16-bit microprocessor buses without external glue logic, preserving PCB layout flexibility across platform generations.
Can the boot block of the AT49F2048A-70TC be reprogrammed after lockout is enabled?
Yes-the AT49F2048A-70TC boot block can be reprogrammed after lockout activation using the 12V RESET override: applying 12.0V ±0.5V to the RESET pin during chip/sector erase or word programming temporarily disables the lockout feature. Once RESET returns to TTL levels, lockout resumes. This capability is unique to the AT49F2048A-70TC and enables secure field recovery without physical device replacement.
What command sequence initiates sector erase on the AT49F2048A-70TC?
The AT49F2048A-70TC sector erase uses a six-bus-cycle command: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → SA/30H, where SA is the sector address (e.g., 01XXXH for boot block). The final data value 30H and sector address are latched on the sixth cycle's rising WE edge. This sequence is validated in the official Atmel datasheet Rev. 1159F–04/01.
Does the AT49F2048A-70TC support data polling for program completion detection?
Yes-the AT49F2048A-70TC supports data polling: reading the last programmed byte returns its complement on I/O7 until programming completes, then true data appears. This provides deterministic, software-driven confirmation of write completion without timer delays or external status lines-enabling robust firmware update routines in resource-constrained embedded systems using the AT49F2048A-70TC.
AT49F2048A-70TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-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:
- 2Mbit
- Memory Organization:
- 256K x 8, 128K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49F2048A-70TC FAQ
1.How can I place an order for AT49F2048A-70TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F2048A-70TC 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 AT49F2048A-70TC reliable?
The price and inventory of AT49F2048A-70TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F2048A-70TC is usually 5 days.
3.What payment methods are accepted for AT49F2048A-70TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F2048A-70TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F2048A-70TC?
AT49F2048A-70TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F2048A-70TC 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 AT49F2048A-70TC?
For technical support, including AT49F2048A-70TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F2048A-70TC requirements.
6.How does Aetrix verify that AT49F2048A-70TC is sourced from the original manufacturer or authorized distributors?
All AT49F2048A-70TC 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 AT49F2048A-70TC meets industry standards.
7.What is the process for return or replacement of AT49F2048A-70TC?
All AT49F2048A-70TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F2048A-70TC, 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 AT49F2048A-70TC part is unused and in its original packaging.
Return procedure for AT49F2048A-70TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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