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Microchip Technology AT49F512-70PC
- Part No.:
- AT49F512-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F512-70PC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,112
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Product details
Overview
AT49F512-70PC from Atmel is a 512K-bit (64K × 8) single-voltage 5V-only CMOS Flash memory IC used for nonvolatile program storage in embedded systems. It delivers 70 ns read access time, supports byte-by-byte programming at 10 µs/byte, and features an 8K-byte boot block with hardware lockout for secure firmware storage. It operates across 0°C to 70°C and is commonly deployed in industrial controllers requiring field-upgradable firmware.
For engineers reviewing the AT49F512-70PC datasheet, AT49F512-70PC pinout, AT49F512-70PC application, or AT49F512-70PC equivalent, key selection considerations include its 5V-only reprogrammability, boot sector write protection, DATA polling/Toggle Bit end-of-program detection, and compatibility with standard EPROM read timing interfaces.
Technical Context
The AT49F512-70PC implements a software-command-controlled Flash architecture with internal program timers and no external high-voltage programming supply required. Its operation relies on six-byte command sequences (e.g., 5555h/2AAAh/80h for chip erase) latched via address/data bus, enabling in-system reprogramming without socket removal.
It supports three primary operational modes: standard EPROM-like read (CE/OE low, WE high), byte programming (CE low, WE low, OE high), and chip erase (six-cycle command sequence). Hardware data protection includes VCC sense (<3.8V inhibit), noise filtering (<15 ns pulse rejection), and dual-line control (CE/OE) to prevent bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), providing sufficient space for boot code + application firmware in mid-complexity microcontrollers. |
| Read Access Time | 70 ns max - compatible with 14 MHz CPU bus timing without wait states in commercial-grade systems. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of small configuration or calibration data blocks. |
| Erase Cycle Time | 10 seconds max for full-chip erase - deterministic timing simplifies host firmware timeout handling. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay loops during programming. |
| Boot Block Size & Protection | 8 KB (0000H–1FFFH) with irreversible lockout via 6-byte command - ensures bootloader integrity during main array updates. |
| Power Dissipation | 30 mA active current / 100 µA CMOS standby - suitable for low-power industrial nodes with periodic wake-up. |
| Endurance | 10,000 write/erase cycles - validated for firmware update cycles over 5+ year product lifetimes. |
Pinout & Package
AT49F512-70PC is packaged in a 32-lead, 0.600" wide plastic dual inline package (PDIP), designated 32P6 per Atmel's ordering information. Pin 1 is marked by a notch or dot; leads are spaced 0.100" (2.54 mm) apart.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A0–A15 directly map to memory locations 0000H–FFFFH. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; outputs valid during read (OE/CE low), inputs latched during programming (WE/CE low). |
| CE | Chip Enable | Active-low global select; device enters standby (<100 µA) when CE = VIH, enabling power gating in multi-device systems. |
| OE | Output Enable | Active-low output control; decouples data bus during transfers to prevent contention when multiple devices share bus. |
| WE | Write Enable | Active-low programming control; initiates byte load or command latch on falling edge; must be held stable ≥90 ns. |
| VCC | Power Supply | +5.0 V ±10%; internal voltage regulator enables reliable operation across supply ripple up to 500 mVpp. |
| GND | Ground Reference | Signal and power return; requires low-inductance connection to minimize noise coupling into I/O timing paths. |
| NC | No Connect | Pins 1, 2, 31, 32 (DIP top view) are unconnected - must remain floating or tied to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V programming voltage rails, reducing BOM count and PCB complexity in embedded designs. |
| Hardware Boot Block Lockout | Irreversible 8KB protection (0000H–1FFFH) prevents accidental overwrite of bootloader - critical for fail-safe system recovery. |
| DATA Polling & Toggle Bit | Dual asynchronous programming completion signals allow real-time status monitoring without fixed delays or external clocks. |
| Internal Program Timer | On-chip timing circuitry automates byte programming pulses and erase cycles - relieves host MCU of precise timing control. |
| VCC Sense Protection | Automatic inhibition of programming if VCC drops below ~3.8 V - prevents corruption during brown-out or power ramp conditions. |
| Noise-Filtered Control Inputs | WE/CE inputs reject transients <15 ns - improves immunity to EMI in industrial motor drive or power supply environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile program memory with secure boot sector; provides deterministic 70 ns read access for real-time scan cycle execution. Use Value: Boot block lockout ensures bootloader remains intact during partial firmware upgrades, preventing brick scenarios during remote maintenance. |
Use Scenario: Retaining calibrated sensor offsets and regulatory-compliant device settings across power cycles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Field-programmable configuration store; leverages 10,000-cycle endurance for lifetime recalibration events. Use Value: DATA polling enables host MCU to verify write completion before committing to next calibration step - essential for audit-trail compliance. |
| Automotive Body Control Module | Networking Equipment Bootloader |
|
Use Scenario: Holding lighting control algorithms and CAN message routing tables in vehicle body computers operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-rated Flash memory (industrial grade variants available); supports 5V bus interface without level shifters. Use Value: Hardware VCC sense and noise filtering ensure robust programming during engine cranking voltage dips and alternator ripple. |
Use Scenario: Storing primary bootloader code that initializes DDR, loads FPGA bitstreams, and validates application images in enterprise switches. IC Role / Device Role / Timing Role: Secure boot memory with immutable 8KB region; accessed via standard memory-mapped bus during cold start. Use Value: Irreversible lockout prevents malicious modification of boot code - foundational for chain-of-trust security architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV512-70PC | 3.3V core with 5V I/O tolerance; 70 ns read; no boot block lockout feature; requires VPP = 12V for programming. | Lacks hardware-protected boot sector; requires external voltage switching for programming - unsuitable for pure 5V systems. | Choose only if migrating to lower-power 3.3V core design and external VPP generation is acceptable. |
| SST39VF512-70-4C-NHE | 3.3V-only operation; 70 ns read; 10 µs byte programming; includes 8KB parameter sector but no irreversible lockout. | Requires level translation for 5V buses; boot sector protection is software-configurable and reversible - less secure than AT49F512-70PC. | Select when 3.3V system integration is mandatory and reversible sector protection suffices for bootloader integrity. |
Compared with AM29LV512-70PC and SST39VF512-70-4C-NHE, the AT49F512-70PC uniquely delivers true 5V-only operation with irreversible boot block lockout - eliminating both voltage translation and post-deployment firmware rollback risks in safety-critical embedded systems.
Availability
AT49F512-70PC is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive body electronics requiring stable component supply across extended product lifecycles.
Supply support for AT49F512-70PC 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
Atmel Corporation (now part of Microchip Technology) is a fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs for embedded applications.
The AT49F512 belongs to Atmel's 5V-only Flash memory product line, designed specifically for cost-sensitive, field-upgradable embedded systems where simplicity of programming and bootloader security are prioritized over ultra-low voltage operation.
FAQ
What is the maximum operating temperature range for the AT49F512-70PC?
The AT49F512-70PC is rated for commercial temperature operation from 0°C to +70°C. Industrial-grade variants (e.g., AT49F512-70PI) extend this to –40°C to +85°C, but the -70PC suffix explicitly denotes the commercial temperature grade. This range is validated per Atmel's DC and AC operating specifications table.
Does the AT49F512-70PC require external high-voltage programming signals?
No, the AT49F512-70PC does not require external high-voltage programming signals. It supports 5V-only reprogramming using standard bus-level commands (e.g., 5555h/2AAAh sequences), eliminating the need for +12V VPP supplies or dedicated programmers - a core design feature confirmed in the device description and command definition tables.
How is boot block protection enabled on the AT49F512-70PC?
Boot block protection on the AT49F512-70PC is enabled via a six-byte command sequence: load AAh to 5555h, 55h to 2AAAh, then 40h to 5555h. Once executed, the 8KB region (0000H–1FFFH) becomes permanently write- and erase-protected. This irreversible lockout is verified by reading I/O0 at address 00002H in Product ID mode.
Can the AT49F512-70PC be used as a direct replacement for standard EPROMs like the 27C512?
Yes, the AT49F512-70PC is pin-compatible and functionally compatible with 27C512 EPROMs in read mode (CE/OE low, WE high), delivering identical 512K×8 organization and EPROM-like access timing. However, programming requires Flash-specific command sequences - not UV erasure - so host firmware must be updated to support software-based erase/program cycles.
What are the two methods for detecting program completion on the AT49F512-70PC?
The AT49F512-70PC provides two hardware-supported methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming, then stabilizes). Both are documented in the Data Polling and Toggle Bit Waveforms sections and require no external components.
AT49F512-70PC 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:
- 512Kbit
- Memory Organization:
- 64K 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
AT49F512-70PC FAQ
1.How can I place an order for AT49F512-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F512-70PC 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 AT49F512-70PC reliable?
The price and inventory of AT49F512-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F512-70PC is usually 5 days.
3.What payment methods are accepted for AT49F512-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F512-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F512-70PC?
AT49F512-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F512-70PC 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 AT49F512-70PC?
For technical support, including AT49F512-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F512-70PC requirements.
6.How does Aetrix verify that AT49F512-70PC is sourced from the original manufacturer or authorized distributors?
All AT49F512-70PC 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 AT49F512-70PC meets industry standards.
7.What is the process for return or replacement of AT49F512-70PC?
All AT49F512-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F512-70PC, 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 AT49F512-70PC part is unused and in its original packaging.
Return procedure for AT49F512-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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