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Microchip Technology AT29C512-70TC
- Part No.:
- AT29C512-70TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C512-70TC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,217
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Product details
Overview
AT29C512-70TC from Atmel is a 512 Kbit (64K × 8) CMOS Flash memory IC designed for in-system reprogrammability with 70 ns read access time, single 5V ±10% supply operation, and sector-based programming of 512 × 128-byte sectors. It serves as nonvolatile program/data storage in embedded controllers, firmware boot loaders, and industrial control systems requiring field-upgradable code.
For engineers reviewing the AT29C512-70TC datasheet, AT29C512-70TC pinout, AT29C512-70TC application, or AT29C512-70TC equivalent, key selection criteria include its 70 ns read timing, hardware/software data protection, 10 ms sector program cycle, DATA polling/Toggle Bit end-of-write detection, and TSOP-32 package compatibility with space-constrained PCB layouts.
Technical Context
The AT29C512-70TC implements a sector-erase architecture where each 128-byte sector is erased and programmed in a single internal cycle using an on-chip timer; address and data latches hold the full sector during load, freeing the bus for concurrent operations. Its dual-line chip enable (CE) and output enable (OE) control enables flexible bus arbitration and prevents contention in shared-memory systems.
Hardware data protection uses VCC sensing (<3.8 V inhibits programming), 5 ms power-on delay, noise filtering (<15 ns pulses ignored), and CE/OE/WE state monitoring; software protection requires a three-byte command sequence (AAh/55h/A0h) to enable and (AAh/55h/80h/AAh/55h/20h) to disable, persisting across power cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), supporting firmware images up to 64 KB in size |
| Read Access Time | 70 ns maximum - enables direct execution from flash in 8-bit microcontroller systems |
| Sector Size | 128 bytes per sector - allows fine-grained updates without erasing entire device |
| Program Cycle Time | 10 ms per sector - defines minimum time between successive sector writes |
| Supply Voltage | 5 V ±10% - eliminates need for dedicated programming voltage rails |
| Active Current | 50 mA typical - determines power budget for active read/write bursts |
| Standby Current | 100 µA CMOS standby - supports low-power sleep modes in battery-backed systems |
| Endurance | 10,000 write/erase cycles per sector - sets field lifetime for frequently updated configuration data |
Pinout & Package
AT29C512-70TC is housed in a 32-lead Thin Small Outline Package (TSOP, Type I, 8 × 20 mm, JEDEC MO-142 BD), optimized for surface-mount assembly and high-density PCBs. Pin 1 identifier is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A7–A15 select sector, A0–A6 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output or program data input; supports DATA polling on I/O7 and Toggle Bit on I/O6 |
| CE | Chip Enable | Active-low global enable; when high, places outputs in high-impedance state and inhibits all operations including programming |
| OE | Output Enable | Active-low read control; must be low during read, high during programming to prevent bus contention |
| WE | Write Enable | Active-low programming control; used with CE to latch addresses/data during byte load and initiate sector programming |
| VCC | Power Supply | +5 V ±10% main supply; powers core logic and I/O buffers; VCC sense circuitry disables programming if below 3.8 V |
| GND | Ground | Reference for all signals and power; decoupling capacitor required near VCC pin for stable operation |
| NC | No Connect | Two pins (positions 6 and 9 in TSOP top view) are unconnected; must remain floating, not tied to VCC/GND |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V-only programming | Eliminates need for +12 V or +25 V programming supplies, simplifying system power design |
| Internal address/data latches | Hold full 128-byte sector during programming, freeing external bus for other tasks |
| DATA polling & Toggle Bit | Enables real-time status monitoring without timers or interrupts - I/O7 complement indicates busy, I/O6 toggling confirms in-progress erase/write |
| Hardware + software data protection | Prevents accidental writes during power-up/down or noise events via VCC sensing, timing delays, and command-gated programming |
| CMOS/TTL-compatible I/O | Interoperates directly with both 5 V CMOS and TTL logic families without level-shifting components |
| Commercial temperature range | Operates reliably from 0°C to +70°C - suitable for office equipment, consumer electronics, and non-critical industrial controls |
Applications
| Embedded Firmware Storage | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing boot code and application firmware for 8-bit microcontrollers in factory automation panels. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; 70 ns access time ensures zero-wait-state execution. Use Value: Enables field firmware upgrades without removing the board; sector erase preserves valid configuration data during partial updates. |
Use Scenario: Holding user-defined ladder logic parameters and I/O mapping tables in programmable logic controllers. IC Role / Device Role / Timing Role: Parameter storage accessed during PLC initialization and runtime; software protection prevents corruption during brown-out conditions. Use Value: 10,000-cycle endurance supports daily parameter adjustments over 10+ years; 100 µA standby current minimizes backup battery drain. |
| Medical Device Bootloader | Networking Equipment Image Storage |
Use Scenario: Secure bootloader storage in diagnostic imaging systems requiring regulatory-compliant firmware integrity. IC Role / Device Role / Timing Role: Read-only boot image memory with hardware write-inhibit during power transitions; product ID mode verifies Atmel manufacturer code (1Fh) and device code (5Dh). Use Value: Dual protection (VCC sense + software lock) meets IEC 62304 safety requirements for preventing unauthorized code execution. |
Use Scenario: Storing multiple firmware images (primary/backup) and MAC address tables in Ethernet switches and routers. IC Role / Device Role / Timing Role: Parallel-access flash memory interfaced to network processor's external bus; TSOP-32 package fits compact module designs. Use Value: 512 sectors allow independent update of bootloader, OS kernel, and application partitions without cross-contamination. |
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 | 5 V-only, 512 Kbit, 70 ns, PDIP-32 package; no software data protection; requires VPP = 12 V for some operations | Lacks software lock and Toggle Bit; suited for legacy designs with fixed firmware and no field update requirement | Select when board layout already accommodates PDIP and security features are unnecessary |
| SST39VF512-70-4C-NHE | 3.3 V core, 5 V tolerant I/O, 512 Kbit, 70 ns, TSOP-32; supports byte-write without sector erase | Lower voltage operation reduces power; lacks hardware VCC-sense protection but adds automatic write suspend/resume | Choose for new low-power designs needing 3.3 V compatibility and finer write granularity than 128-byte sectors |
Compared with AM29LV512-70PC, AT29C512-70TC provides stronger data integrity via dual protection and sector-level flexibility; versus SST39VF512-70-4C-NHE, it trades 3.3 V operation for robust 5 V-only simplicity and higher write endurance in industrial environments.
Availability
AT29C512-70TC is available at Aetrix Electronics and suitable for embedded firmware storage, industrial PLC configuration, medical device bootloaders, and networking equipment image storage requiring stable component supply and long-term obsolescence management.
Supply support for AT29C512-70TC 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, nonvolatile memory, and secure authentication ICs.
The AT29C512 belongs to Atmel's legacy parallel Flash memory product line, engineered for cost-sensitive, 5 V-based embedded systems requiring reliable in-system reprogrammability without high-voltage programming infrastructure.
FAQ
What is the operating temperature range for the AT29C512-70TC?
The AT29C512-70TC is rated for commercial temperature operation from 0°C to +70°C. This range is specified in the Ordering Information table and applies to all electrical characteristics including 70 ns access time and 100 µA standby current. Industrial variants (e.g., AT29C512-70TI) extend to –40°C to +85°C but use different suffixes and packaging.
How does DATA polling work on the AT29C512-70TC?
During programming, reading the last loaded byte returns the complement of the data on I/O7 until completion; once valid, true data appears. This allows software to poll I/O7 without timers or interrupts. The AT29C512-70TC supports this feature across all sectors and requires no special setup beyond standard read timing (tOE ≤ 35 ns).
Can the AT29C512-70TC be used as a direct replacement for EPROMs like the 27C512?
Yes, the AT29C512-70TC is pin-compatible with 27C512 EPROMs in TSOP-32, shares identical address/data bus structure (A0–A15, I/O0–I/O7), and operates with same CE/OE/WE control logic. However, it adds sector programming, software protection, and eliminates UV-erasure - requiring only firmware-level adaptation for write sequences.
What package type does the AT29C512-70TC use, and what are its key mechanical dimensions?
The AT29C512-70TC uses a 32-lead Thin Small Outline Package (TSOP, Type I, JEDEC MO-142 BD), measuring 8 mm × 20 mm with 0.5 mm lead pitch. Key dimensions include D1 = 18.3–18.5 mm (body length), E = 7.9–8.1 mm (body width), and A2 = 0.95–1.05 mm (package height), enabling high-density SMT placement.
Does the AT29C512-70TC support chip-wide erase, and how is it initiated?
Yes, the AT29C512-70TC supports optional software chip erase using a 6-byte command sequence (AAh/55h/80h/AAh/55h/10h) issued to address 5555h. This erases all 512 sectors simultaneously and is documented in Atmel's Software Chip Erase application note - distinct from sector erase which targets individual 128-byte blocks.
AT29C512-70TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-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:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- 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:
- 32-TSOP
AT29C512-70TC FAQ
1.How can I place an order for AT29C512-70TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C512-70TC 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 AT29C512-70TC reliable?
The price and inventory of AT29C512-70TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C512-70TC is usually 5 days.
3.What payment methods are accepted for AT29C512-70TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C512-70TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C512-70TC?
AT29C512-70TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C512-70TC 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 AT29C512-70TC?
For technical support, including AT29C512-70TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C512-70TC requirements.
6.How does Aetrix verify that AT29C512-70TC is sourced from the original manufacturer or authorized distributors?
All AT29C512-70TC 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 AT29C512-70TC meets industry standards.
7.What is the process for return or replacement of AT29C512-70TC?
All AT29C512-70TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C512-70TC, 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 AT29C512-70TC part is unused and in its original packaging.
Return procedure for AT29C512-70TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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