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Microchip Technology AT29C040A-10TI
- Part No.:
- AT29C040A-10TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C040A-10TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,536
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Product details
Overview
AT29C040A-10TI from Microchip Technology (formerly Atmel) is a 4-Mbit (512K × 8) 5V-only CMOS Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 100 ns read access time, sector-based reprogramming (2048 × 256-byte sectors), hardware/software data protection, and two 16 KB boot blocks with independent lockout-enabling secure firmware boot storage in industrial controllers and legacy microcontroller systems.
For engineers reviewing the AT29C040A-10TI datasheet, AT29C040A-10TI pinout, AT29C040A-10TI application, or AT29C040A-10TI equivalent, key selection considerations include its 5V-only operation, 100 ns tACC timing grade, -40°C to +85°C industrial temperature range, TSOP-32 package, and sector-program architecture requiring full 256-byte reloads for partial updates.
Technical Context
The AT29C040A-10TI implements a sector-erase/program architecture where each 256-byte sector must be fully loaded before internal auto-erase-and-program execution. Address latching occurs on falling CE or WE edges, with A0–A7 selecting byte offset and A8–A18 specifying sector address during programming.
It supports dual data validation methods: DATA polling via I/O7 complement detection and TOGGLE BIT monitoring on I/O6. Hardware protection includes VCC sense (<3.8 V inhibit), 5 ms power-on delay, and noise filtering (<15 ns pulse rejection); software protection uses three-byte command sequences at fixed addresses (5555H/2AAAH) to enable/disable write locks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8 bits) - supports full firmware images for 8-bit/16-bit MCUs without external banking logic. |
| Read Access Time | 100 ns (tACC) - enables direct execution from flash (XIP) in systems with ≤10 MHz bus clocks. |
| Sector Size | 256 bytes - matches typical bootloader partition granularity and minimizes rewrite overhead during field updates. |
| Program Cycle Time | 10 ms per sector - defines minimum latency for firmware patching; requires system-level timeout handling. |
| Supply Voltage | 5.0 V ±10% - eliminates need for charge pumps or auxiliary voltage rails; compatible with legacy 5V logic families. |
| Endurance | >10,000 program/erase cycles per sector - sufficient for infrequent field upgrades over 10+ year product lifecycles. |
| Standby Current | 100 µA (CMOS mode) - enables low-power retention in battery-backed or energy-harvested edge nodes. |
| Operating Temp | -40°C to +85°C - qualified for industrial automation, motor drives, and outdoor metering applications. |
Pinout & Package
AT29C040A-10TI is supplied in a 32-lead Thin Small Outline Package (TSOP Type 1, 32T), pin-compatible with industry-standard 32-pin Flash memory footprints. The package supports surface-mount assembly and meets JEDEC MO-153 mechanical specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus; A0–A7 select byte within 256-byte sector, A8–A18 select sector (0–2047). |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; supports byte-load programming and EPROM-style read access. |
| CE | Chip Enable | Active-low chip select; must be low for read, program, or identification modes; enables bus sharing. |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention when disabled during writes. |
| WE | Write Enable | Active-low write strobe; controls latching of addresses/data during byte load and program initiation. |
| NC | No Connect | Pin 32 is unconnected; must remain floating or tied to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Two 16 KB Boot Blocks with Independent Lockout | Enables secure storage of primary and fallback boot code; lockout prevents accidental overwrite during field firmware updates. |
| Hardware + Software Data Protection | VCC sensing, 5 ms power-on delay, and 3-byte command sequence prevent unintended writes during brown-out or noise events. |
| DATA Polling & TOGGLE BIT Detection | Allows real-time program completion monitoring without dedicated status pins or external timers-reducing MCU GPIO usage. |
| Single 5V Supply Operation | Eliminates need for 12V programming voltages or charge-pump circuitry, simplifying power design and PCB layout. |
| 2048 × 256-Byte Sectors | Provides fine-grained update capability: only modified sectors require reprogramming, minimizing wear and downtime. |
Applications
| Industrial PLC Firmware Storage | Legacy Automotive ECU Code Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers deployed in factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage with direct bus interface; provides deterministic 100 ns read access for real-time scan cycle execution. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 100 µA standby current extends uptime during maintenance power-downs. | Use Scenario: Holding calibration maps and diagnostic routines in pre-OBD-II engine control units where space-constrained TSOP packaging is required. IC Role / Device Role / Timing Role: Replacement for obsolete EPROMs; functions as drop-in 5V-compatible memory with identical timing and pinout. Use Value: Sector erase avoids full-chip reprogramming during calibration updates; hardware VCC sense prevents corruption during vehicle cranking voltage dips. |
| Medical Device Bootloader Storage | Point-of-Sale Terminal BIOS Retention |
Use Scenario: Securing boot firmware in Class II medical instruments requiring traceable, tamper-resistant startup code with regulatory audit trails. IC Role / Device Role / Timing Role: Secure nonvolatile storage with software-enabled write protection; supports cryptographic signature verification during boot. Use Value: Independent boot block lockout allows separate certification of bootloader vs. application firmware; >10,000 endurance supports long-term device recalibration cycles. | Use Scenario: Maintaining BIOS and payment stack initialization code in retail terminals operating 24/7 in uncontrolled ambient conditions. IC Role / Device Role / Timing Role: Primary firmware repository interfaced directly to 8051 or Z80 derivatives; operates across -40°C to +85°C without derating. Use Value: 10 ms sector programming enables fast firmware hotfix deployment; CMOS standby current minimizes thermal load in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-NHE | 4 Mbit, 70 ns access, 3.3V supply; no boot block lockout; supports byte-write without sector reload. | Requires level-shifting for 5V systems; lacks hardware-secured boot region for safety-critical boot code. | Select when migrating to 3.3V platforms or needing finer write granularity; not suitable for 5V-only legacy designs. |
| MX29LV400CBTI-70G | 4 Mbit, 70 ns, 3.0–3.6V supply; CFI-compliant; includes 16 KB top/bottom boot blocks but no lockout feature. | Needs external voltage regulator; lacks software/hardware write inhibit during brown-out-increasing corruption risk in unstable power environments. | Prefer for new 3.3V designs requiring JEDEC-standard command sets; avoid where 5V compatibility or robust power-fail protection is mandatory. |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CBTI-70G, the AT29C040A-10TI uniquely delivers 5V-only operation with integrated boot block lockout and dual hardware/software write protection-making it the only option for maintaining legacy industrial firmware integrity without board redesign.
Availability
AT29C040A-10TI is available at Aetrix Electronics and suitable for industrial automation, automotive ECU retrofit, and medical device manufacturing requiring stable component supply across extended product lifecycles.
Supply support for AT29C040A-10TI 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 legacy Atmel Flash products including the AT29C040A series.
The AT29C040A belongs to Atmel's 5V-only Flash memory family, designed specifically for drop-in replacement of EPROMs and EEPROMs in cost-sensitive, temperature-resilient industrial and automotive applications.
FAQ
What is the maximum operating temperature range for the AT29C040A-10TI?
The AT29C040A-10TI is rated for industrial operation from -40°C to +85°C. This range is validated per Microchip's qualification standards and applies to all DC and AC parameters specified in the datasheet, including 100 ns read access and 10 ms sector programming. The TSOP-32 package construction ensures thermal stability under sustained industrial ambient conditions.
Does the AT29C040A-10TI require external high-voltage programming signals?
No, the AT29C040A-10TI operates with single 5V ±10% supply and requires no external high-voltage programming signals. All reprogramming-including sector erase and byte load-is executed using standard 5V logic levels and timed command sequences (e.g., 5555H/2AAAH). This eliminates need for charge pumps or auxiliary voltage generators in the host system.
How does the boot block lockout feature function in the AT29C040A-10TI?
The AT29C040A-10TI contains two 16 KB boot blocks (lowest and highest address regions) that can be independently locked against programming via a seven-command algorithm. Once enabled, locked blocks retain data permanently-even during chip erase-and are verified by reading FFFF2H (upper) or 00002H (lower). This ensures bootloader integrity in safety-critical applications.
Can the AT29C040A-10TI be used as a direct replacement for standard EPROMs like the 27C040?
Yes, the AT29C040A-10TI is pin- and command-compatible with 27C040 EPROMs in read mode, supporting identical CE/OE/WE control and output timing. However, programming requires sector-based 256-byte loads instead of byte-by-byte writes, and software command sequences must initiate erase/program cycles-requiring minor firmware adaptation.
What methods are available to detect program completion on the AT29C040A-10TI?
The AT29C040A-10TI supports two hardware-confirmed program completion detection methods: DATA polling (monitoring complement state on I/O7) and TOGGLE BIT (observing I/O6 state transitions). Both operate during active programming and require no additional pins or external components-enabling efficient MCU resource use during firmware updates.
AT29C040A-10TI 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:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 100 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29C040A-10TI FAQ
1.How can I place an order for AT29C040A-10TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C040A-10TI 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 AT29C040A-10TI reliable?
The price and inventory of AT29C040A-10TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C040A-10TI is usually 5 days.
3.What payment methods are accepted for AT29C040A-10TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C040A-10TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C040A-10TI?
AT29C040A-10TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C040A-10TI 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 AT29C040A-10TI?
For technical support, including AT29C040A-10TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C040A-10TI requirements.
6.How does Aetrix verify that AT29C040A-10TI is sourced from the original manufacturer or authorized distributors?
All AT29C040A-10TI 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 AT29C040A-10TI meets industry standards.
7.What is the process for return or replacement of AT29C040A-10TI?
All AT29C040A-10TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C040A-10TI, 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 AT29C040A-10TI part is unused and in its original packaging.
Return procedure for AT29C040A-10TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29C040A-10TI Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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