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Microchip Technology AT49F2048A-70TI
- Part No.:
- AT49F2048A-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F2048A-70TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,488
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Product details
Overview
AT49F2048A-70TI 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, and hardware data protection. It supports byte/word programming in industrial temperature range (–40°C to +85°C) and is used for firmware storage in embedded controllers and boot code retention.
For engineers reviewing the AT49F2048A-70TI datasheet, AT49F2048A-70TI pinout, AT49F2048A-70TI application, or AT49F2048A-70TI equivalent, key selection criteria include its 70 ns read timing, 8K-word boot block with lockout, 10,000 program/erase cycles, TSOP-48 industrial-grade packaging, and BYTE-selectable byte/word interface mode.
Technical Context
The AT49F2048A-70TI implements a four-sector Flash architecture: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 112K-word main memory array. Erase operations are executed via six-cycle software command sequences with internal timing control.
It features dual-mode I/O configuration controlled by the BYTE pin: logic high enables 16-bit word mode (I/O0–I/O15 active); logic low enables 8-bit byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1 address input). Data Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time program/erase status feedback without external clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8 or 128K × 16 organization) |
| Read Access Time | 70 ns - guarantees fast instruction fetch in microcontroller boot paths |
| Operating Voltage | 5 V ±10% - single-supply operation eliminates need for charge pumps or auxiliary rails |
| Temperature Range | –40°C to +85°C - qualified for industrial embedded systems and automotive body electronics |
| Program/Erase Endurance | 10,000 cycles - supports field firmware updates over product lifetime |
| Active Current | 50 mA at 5 MHz - enables low-power system-level power budgeting |
| Standby Current | 100 µA CMOS - critical for battery-backed or always-on applications |
| Erase Time (Sector) | 10 seconds - deterministic sector-level reprogramming without host CPU intervention |
Pinout & Package
AT49F2048A-70TI is packaged in a 48-lead Thin Small Outline Package (TSOP Type 1, JEDEC MO-142 DD), 12 mm × 20 mm footprint, 0.5 mm lead pitch, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 256K-byte addressing space |
| CE | Chip Enable | Primary chip select; device enters high-Z when high, enabling multi-device bus sharing |
| OE | Output Enable | Controls output drivers independently of CE; allows read gating without deselecting chip |
| WE | Write Enable | Initiates command latching and internal program/erase cycles on falling edge |
| RESET | Reset Input | Halts ongoing operation and forces high-Z outputs; 12 V override enables boot block reprogramming |
| BYTE | Interface Mode Select | Logic high = 16-bit word mode; logic low = 8-bit byte mode with I/O15 → A−1 remapping |
| I/O0–I/O7 | Data I/O (Byte Mode) | Active bidirectional data bus in byte mode; tri-stated in word mode unless BYTE = 1 |
| I/O8–I/O14 | Data I/O (Word Mode) | Active in 16-bit word mode; tri-stated in byte mode |
| I/O15 / A−1 | Multi-function Terminal | In word mode: MSB data I/O; in byte mode: LSB address input (A−1) for 8-bit addressing |
| VCC | Power Supply | +5 V supply; internal voltage sensing prevents programming below 3.8 V |
| GND | Ground | Two dedicated ground pins (pins 23 and 48) reduce noise coupling and improve signal integrity |
| NC | No Connect | Unbonded pins (e.g., pins 9–12, 15–17, 25–26, 31–32) - must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | Hardware-enforced write protection for 8K-word (00000H–01FFFH) secure boot region; enabled via 6-cycle command sequence |
| Software Command Architecture | Standardized 6-cycle command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h) eliminate need for external high-voltage programming circuitry |
| Data Polling & Toggle Bit | Real-time status reporting via I/O7 complement and I/O6 toggling - enables polling-based firmware update without timers or interrupts |
| Hardware Data Protection | Integrated safeguards: VCC sense (<3.8 V inhibits programming), 10 ms power-on delay, OE/CE/WE inhibit logic, and 15 ns noise filtering on control lines |
| Sector-Erasable Architecture | Four independent sectors (boot, two parameter, main array) allow selective firmware updates without erasing entire memory |
| Single 5 V Supply | Eliminates requirement for 12 V or 21 V programming voltages - simplifies PCB layout and reduces BOM count |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module Boot Code |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing reliable code execution on power-up; 70 ns access ensures minimal boot latency. Use Value: Industrial temperature rating (–40°C to +85°C) and 10,000-cycle endurance support long-term field deployment without degradation. |
Use Scenario: Holding secure bootloader and calibration data in automotive body control units requiring ASIL-B–compatible nonvolatile storage. IC Role / Device Role / Timing Role: Boot block–protected Flash memory delivering tamper-resistant startup code; RESET pin 12 V override enables safe field recovery. Use Value: Boot block lockout prevents accidental corruption of safety-critical boot code during routine parameter updates in the main memory array. |
| Medical Device Configuration Memory | Networking Equipment Parameter Storage |
Use Scenario: Retaining user-configurable settings and device calibration tables in portable diagnostic instruments with battery backup constraints. IC Role / Device Role / Timing Role: Low-power Flash memory operating in standby at 100 µA - extends battery life during idle periods. Use Value: CMOS standby current and sector-erase capability enable infrequent, targeted updates without full memory rewrites. |
Use Scenario: Storing MAC addresses, firmware patches, and network stack parameters in Ethernet switches and routers requiring field-upgradable storage. IC Role / Device Role / Timing Role: Dual-mode (byte/word) interface adapts to host processor bus width; BYTE pin enables flexible integration with 8-bit or 16-bit microcontrollers. Use Value: 16-bit word mode doubles data throughput during firmware loading; 8-bit mode preserves compatibility with legacy 8-bit hosts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-EKE | 48-pin TSOP, 2 Mbit, 70 ns, 3.3 V supply - requires level-shifting for 5 V systems | Designed for 3.3 V embedded systems; lacks boot block lockout and RESET-based override | Select only if migrating to 3.3 V architecture and external security logic can replace boot block protection |
| MX29LV200CBTI-70G | 48-pin TSOP, 2 Mbit, 70 ns, 3.0–3.6 V supply - no 5 V compatibility | Uses CFI-compliant command set; no hardware RESET override for protected sectors | Prefer for new 3.3 V designs needing JEDEC-standard interface; not drop-in for 5 V AT49F2048A-70TI systems |
Compared with SST39VF200A-70-4C-EKE and MX29LV200CBTI-70G, the AT49F2048A-70TI uniquely supports 5 V-only operation, integrated boot block lockout with 12 V RESET override, and true industrial temperature qualification - making it irreplaceable in legacy 5 V industrial and automotive platforms requiring secure, field-upgradable firmware storage.
Availability
AT49F2048A-70TI is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical diagnostics equipment, and networking infrastructure requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F2048A-70TI 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 industrial, automotive, and consumer applications.
The AT49F2048A product line delivers 5 V-only Flash memory optimized for embedded firmware storage, featuring sector-erasable architecture, hardware data protection, and boot block security - targeting cost-sensitive, reliability-critical applications where 3.3 V migration is not feasible.
FAQ
What is the operating temperature range for the AT49F2048A-70TI?
The AT49F2048A-70TI is rated for industrial operation from –40°C to +85°C. This specification is validated per the manufacturer's DC and AC operating range table and applies to all functional modes including read, program, and erase. The device maintains 70 ns read access time and 100 µA standby current across this full range, making it suitable for deployment in uncontrolled environmental conditions typical of factory automation and vehicle under-hood applications.
Does the AT49F2048A-70TI support both byte and word data interfaces?
Yes, the AT49F2048A-70TI supports configurable 8-bit and 16-bit operation via the BYTE pin. When BYTE = logic high or open, the device operates in 16-bit word mode with I/O0–I/O15 active. When BYTE = logic low, it operates in 8-bit byte mode: I/O0–I/O7 are active data lines, while I/O15 functions as the A−1 address input and I/O8–I/O14 enter high-impedance state. This dual-mode capability enables seamless integration with both 8-bit and 16-bit microcontrollers without external glue logic.
How is boot block protection implemented in the AT49F2048A-70TI?
The AT49F2048A-70TI implements boot block protection through a hardware-enforced lockout feature covering the 8K-word sector at addresses 00000H–01FFFH. Once enabled via a documented six-cycle command sequence (5555h/AAh → 2AAAh/55h → 5555h/40h), the boot block becomes immune to erase or program commands using standard 5 V inputs. Recovery requires applying 12 V ± 0.5 V to the RESET pin during the command cycle - a deliberate, high-voltage mechanism preventing accidental or malicious modification of critical boot code stored in the AT49F2048A-70TI.
What methods does the AT49F2048A-70TI provide to detect completion of program or erase operations?
The AT49F2048A-70TI provides two hardware-supported status detection methods: Data Polling and Toggle Bit. During programming, reading the last written location returns the complement of the loaded data on I/O7; when complete, true data appears. During erase, I/O7 reads "0" until completion. Simultaneously, I/O6 toggles between 0 and 1 during active program/erase cycles and stabilizes upon completion. Both mechanisms operate autonomously without external clocks or timers, enabling efficient polling-based firmware update routines in the AT49F2048A-70TI.
Is the AT49F2048A-70TI pin-compatible with other 2 Mbit Flash devices in TSOP-48 packages?
No, the AT49F2048A-70TI is not pin-compatible with generic 2 Mbit TSOP-48 Flash devices. Its pinout includes dedicated RESET and BYTE control signals, dual-purpose I/O15/A−1 functionality, and specific NC placements that differ from JEDEC-standard 2 Mbit Flash footprints. Substitution requires verification of signal mapping, command set compatibility, and timing alignment - particularly for RESET-driven boot block override and BYTE-mode configuration, which are unique to the AT49F2048A-70TI architecture.
AT49F2048A-70TI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49F2048A-70TI FAQ
1.How can I place an order for AT49F2048A-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F2048A-70TI 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-70TI reliable?
The price and inventory of AT49F2048A-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F2048A-70TI is usually 5 days.
3.What payment methods are accepted for AT49F2048A-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F2048A-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F2048A-70TI?
AT49F2048A-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F2048A-70TI 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-70TI?
For technical support, including AT49F2048A-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F2048A-70TI requirements.
6.How does Aetrix verify that AT49F2048A-70TI is sourced from the original manufacturer or authorized distributors?
All AT49F2048A-70TI 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-70TI meets industry standards.
7.What is the process for return or replacement of AT49F2048A-70TI?
All AT49F2048A-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F2048A-70TI, 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-70TI part is unused and in its original packaging.
Return procedure for AT49F2048A-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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