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Microchip Technology AT49F001-70PC
- Part No.:
- AT49F001-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F001-70PC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,212
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Product details
Overview
AT49F001-70PC from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, hardware data protection, and sector-based architecture with a 16 KB boot block supporting programming lockout.
For engineers reviewing the AT49F001-70PC datasheet, AT49F001-70PC pinout, AT49F001-70PC application, or AT49F001-70PC equivalent, key selection considerations include its 32-pin PDIP package, 5V-only operation, boot-block write protection, DATA polling/Toggle Bit end-of-program detection, and compatibility with standard EPROM read timing interfaces.
Technical Context
The AT49F001-70PC implements a sector-erasable Flash architecture with four distinct memory regions: one 16 KB boot block (address 00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). Its command interface uses six-byte sequences latched via WE/CE edges to execute chip erase, sector erase, byte programming, and boot lockout enable functions.
Internal program control includes automatic pulse generation, VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and dual hardware/software protection - including RESET-pin-based 12 V override for boot block reprogramming. The device operates in standard EPROM read mode (CE/OE low, WE high) and supports TTL/CMOS-compatible I/O levels with 50 mA active and 100 µA standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits), organized as 128K words × 8 bits - directly replaces 27C010 EPROMs in legacy designs. |
| Read Access Time | 70 ns max (tACC) - ensures compatibility with 14 MHz Z80, 8051, and 68K bus cycles without wait states. |
| Byte Programming Time | 10 µs typical (tBP) - enables fast field updates of configuration or calibration data without system interruption. |
| Chip Erase Time | 10 seconds max (tEC) - deterministic internal timing eliminates need for external erase controllers or timers. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - allows real-time status monitoring without dedicated status pins. |
| Boot Block Protection | 16 KB (00000H–03FFFH) with lockout enable via 6-byte command sequence - secures bootloader firmware against accidental overwrite. |
| Power Dissipation | 275 mW typical at 55 ns (5V, 5 MHz), 100 µA CMOS standby - suitable for low-power industrial control and battery-backed applications. |
Pinout & Package
AT49F001-70PC is supplied in a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated as package type 32P6 per Microchip's ordering information. Pin 1 is located at the left end of the top row when viewed with notch up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 map directly to memory location bits. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; tri-stated when CE or OE is high to prevent bus contention. |
| 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 manage bus sharing and avoid contention during multi-device reads. |
| WE | Write Enable | Active-low write strobe; controls latching of addresses/data during programming/erase command sequences. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces outputs to high-Z; 12 V on this pin overrides boot block lockout. |
| VCC | Power Supply | +5 V ±10% supply; powers all internal logic and charge pumps; VCC sense prevents programming below 3.8 V. |
| GND | Ground | Signal and power reference; required for stable operation and noise immunity across all modes. |
| NC | No Connect | Pin 9 is NC in TSOP/VSOP packages but not applicable to PDIP; in AT49F001-70PC (PDIP), all 32 pins are functional or GND/VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12 V or +21 V programming voltages - simplifies power design and enables true in-system reprogramming. |
| Sector Architecture with Boot Lockout | Enables secure bootloader storage (00000H–03FFFH) while allowing independent update of parameter and application memory blocks. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition (OE low/CE high/WE high) prevent spurious writes during power-up/down or EMI events. |
| DATA Polling & Toggle Bit | Provides software-controllable, pin-efficient status feedback - no extra status lines or polling overhead beyond standard I/O bus. |
| 10,000 Program/Erase Cycles | Guarantees long-term field reliability for firmware updates, calibration storage, and configuration logging in industrial equipment. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Bootloader |
|---|---|
Use Scenario: Storing firmware images and runtime configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed 10,000-cycle endurance and 0°C–70°C commercial temperature rating. Use Value: Enables field firmware upgrades without removing the module; boot block lockout prevents corruption of critical startup routines during remote updates. |
Use Scenario: Hosting secure boot code for 8-bit and 16-bit microcontrollers (e.g., 8051, Z80, 68HC11) in medical and test equipment. IC Role / Device Role / Timing Role: EPROM-replacement Flash memory with 70 ns read timing and standard CE/OE/WE control interface. Use Value: Eliminates UV-erasure requirement and socket wear; 16 KB protected boot sector ensures system always boots from validated firmware. |
| Embedded Instrument Calibration Data | Communications Equipment Parameter Storage |
Use Scenario: Retaining calibrated sensor offsets and gain coefficients in portable test instruments powered by batteries or low-noise supplies. IC Role / Device Role / Timing Role: Low-power nonvolatile memory with 100 µA CMOS standby current and 5V-only operation. Use Value: Minimizes quiescent drain on backup power sources; sector erase allows selective update of calibration tables without disturbing firmware. |
Use Scenario: Storing protocol stacks, channel maps, and security keys in telecom line cards and base station subsystems. IC Role / Device Role / Timing Role: In-system reprogrammable Flash with hardware write protection and 12 V RESET override for emergency recovery. Use Value: Supports over-the-air (OTA) updates and secure key management; boot lockout prevents unauthorized modification of critical communication modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29C010A-70PU | Same 1 Mbit density, 70 ns access, PDIP-32 package, but lacks boot block lockout and RESET-based override; uses different command set. | Supports basic firmware storage but offers no hardware-enforced bootloader protection. | Select when boot security is unnecessary and legacy AT29C-series compatibility is required. |
| MX29LV160BTC-70G | 16 Mbit (2 MB), 70 ns, TSOP-48; supports CFI, wider voltage range (2.7–3.6 V), no 5V-only operation; boot block at top/bottom selectable. | Designed for modern 3.3 V systems; incompatible pinout and voltage domain - requires level-shifting and PCB redesign. | Select only for new 3.3 V designs requiring higher density and CFI-compliant toolchain support. |
Compared with AT29C010A-70PU and MX29LV160BTC-70G, the AT49F001-70PC uniquely delivers 5V-only operation, hardware boot lockout with 12 V RESET override, and direct PDIP drop-in replacement for 27C010 - making it optimal for maintaining and upgrading legacy industrial control hardware without board changes.
Availability
AT49F001-70PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller bootloader deployment, and embedded instrument calibration data retention requiring stable component supply across extended production lifecycles.
Supply support for AT49F001-70PC 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 the AT49F series Flash memories, including datasheets, application notes, and long-term manufacturing commitments.
The AT49F001 product line was designed specifically for 5V embedded systems needing EPROM-compatible Flash with enhanced in-system reprogrammability, sector protection, and robust hardware safeguards against inadvertent writes.
FAQ
What is the memory organization of the AT49F001-70PC?
The AT49F001-70PC contains 1 Mbit (131,072 × 8) of Flash memory, organized as 128K words × 8 bits. Its physical address space spans 00000H to 1FFFFH, partitioned into a 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). This layout is fixed and matches the AT49F001-70PC datasheet revision 1008D.
Does the AT49F001-70PC support in-system programming without high-voltage signals?
Yes, the AT49F001-70PC supports full in-system reprogramming using only a 5 V supply - no +12 V or +21 V programming voltages are required. All commands (byte program, sector erase, chip erase, boot lockout) are executed via standard 5 V logic-level signals applied to CE, WE, OE, and address/data buses per the documented 4- to 6-cycle command sequences.
How is boot block protection enabled and overridden on the AT49F001-70PC?
Boot block protection on the AT49F001-70PC is enabled by issuing a specific six-byte command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once enabled, the 16 KB boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5 V. Override is achieved by applying 12.0 V ±0.5 V to the RESET pin during chip/sector erase or byte programming.
What are the valid operating temperature and supply ranges for the AT49F001-70PC?
The AT49F001-70PC is rated for commercial temperature operation from 0°C to +70°C and requires a VCC supply of 5.0 V ±10% (4.5 V to 5.5 V). Its DC characteristics - including 50 mA active current and 100 µA CMOS standby current - are specified under these conditions. The "-70" suffix denotes 70 ns maximum access time, not temperature grade.
Can the AT49F001-70PC be used as a direct replacement for the 27C010 EPROM?
Yes, the AT49F001-70PC is pin-compatible and functionally compatible with the 27C010 EPROM in PDIP-32 packaging. It uses identical CE/OE/WE control timing for read operations and occupies the same 128K × 8 address space. However, AT49F001-70PC requires explicit command sequences for programming/erasing and provides additional features like boot lockout and DATA polling not present in the 27C010.
AT49F001-70PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F001-70PC FAQ
1.How can I place an order for AT49F001-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001-70PC 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 AT49F001-70PC reliable?
The price and inventory of AT49F001-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001-70PC is usually 5 days.
3.What payment methods are accepted for AT49F001-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001-70PC?
AT49F001-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001-70PC 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 AT49F001-70PC?
For technical support, including AT49F001-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001-70PC requirements.
6.How does Aetrix verify that AT49F001-70PC is sourced from the original manufacturer or authorized distributors?
All AT49F001-70PC 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 AT49F001-70PC meets industry standards.
7.What is the process for return or replacement of AT49F001-70PC?
All AT49F001-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001-70PC, 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 AT49F001-70PC part is unused and in its original packaging.
Return procedure for AT49F001-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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