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Microchip Technology AT29C1024-70TC
- Part No.:
- AT29C1024-70TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29C1024-70TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,872
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Product details
Overview
AT29C1024-70TC from Atmel is a 5-V-only, 1-Mbit (64K × 16) Flash memory IC designed for in-system reprogrammability in embedded controllers and firmware storage applications. It delivers 70 ns read access time, supports sector-based programming with 512 sectors (128 words/sector), and operates across commercial temperature range (0°C to 70°C) in a 48-lead TSOP package.
For engineers reviewing the AT29C1024-70TC datasheet, AT29C1024-70TC pinout, AT29C1024-70TC application, or AT29C1024-70TC equivalent, this page provides verified electrical specs, validated sector-program timing, confirmed hardware/software data protection mechanisms, and real-world use cases in firmware update systems and industrial controller boot memory.
Technical Context
The AT29C1024-70TC implements a nonvolatile CMOS Flash architecture with internal address/data latches for full 128-word sector buffering. Its dual-line chip enable (CE) and output enable (OE) control enables bus contention avoidance during mixed-read/write operations.
Programming is executed per sector using a single-cycle erase-and-program sequence timed by an on-chip control timer; end-of-program detection is supported via DATA polling on I/O7/I/O15 or TOGGLE bit behavior on I/O6/I/O14 - both confirmed functional per AC characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (65,536 × 16 bits) - supports full firmware image storage for 8-bit/16-bit microcontrollers. |
| Read Access Time | 70 ns - enables direct execution from flash in high-speed embedded systems without wait states. |
| Sector Architecture | 512 sectors × 128 words - allows granular firmware updates without erasing entire memory. |
| Program Cycle Time | 10 ms per sector - deterministic timing for host MCU scheduling of background updates. |
| VCC Supply | 5 V ± 5% - compatible with legacy 5V logic systems without level-shifting circuitry. |
| Standby Current | 200 µA (CMOS) - suitable for low-power modes in battery-backed industrial controllers. |
| Endurance | >10,000 write/erase cycles per sector - validated for field-upgradable equipment with multi-year service life. |
Pinout & Package
AT29C1024-70TC is housed in a 48-lead Thin Small Outline Package (TSOP, JEDEC MO-142 DD), pin-compatible with industry-standard 48T footprint. Pin functions are electrically and physically validated per Atmel Rev. 0571A–10/98 datasheet Figure 1 (TSOP Top View).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; A7–A15 define sector, A0–A6 define word within sector. |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel data path; supports DATA polling on I/O7/I/O15 and TOGGLE on I/O6/I/O14. |
| CE | Chip Enable | Active-low device select; must be low for read, program, or identification modes. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads. |
| WE | Write Enable | Active-low signal initiating data load or program cycle; timing-critical for 150 µs word load window. |
| VCC, VSS | Power Supply | Single 5V supply with dedicated ground pins; decoupling required per AC waveform guidelines. |
| NC | No Connect | Unbonded pins (positions 1, 8, 25, 26, 30, 40, 43, 44, 47, 48); must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Data Protection | VCC sense (inhibit below 3.8 V), 5 ms power-on delay, and noise filtering (<15 ns pulses rejected) prevent spurious writes during brown-out or EMI events. |
| Software Data Protection | Three-command unlock sequence (5555h/2AAAh/A0A0h) required before each sector program - prevents accidental firmware corruption. |
| Internal Program Control | On-chip timer automates full sector erase + program sequence; eliminates external timing circuitry or software delays. |
| DATA Polling & TOGGLE Bit | Dual end-of-program detection methods allow flexible host polling strategies without fixed timeout loops. |
| CMOS/TTL Compatibility | Input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive (VOH = 2.4 V @ –400 µA) ensure interoperability with both logic families. |
Applications
| Firmware Storage in Industrial PLCs | Boot Memory for 8051-Based Controllers |
|---|---|
Use Scenario: Storing and updating ladder logic programs and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with in-system reprogrammability; 70 ns access enables fast instruction fetch during runtime. Use Value: Enables remote firmware upgrades without removing the PLC module; sector erase preserves critical calibration data during partial updates. | Use Scenario: Hosting boot code and interrupt vectors for 8051-family microcontrollers in medical diagnostic equipment requiring certified firmware integrity. IC Role / Device Role / Timing Role: Primary boot ROM accessed at power-on reset; 5V-only operation matches legacy 8051 voltage domain. Use Value: Hardware and software data protection ensures boot code cannot be overwritten by transient glitches or software bugs. |
| Field-Upgradeable Meter Firmware | Configuration Storage in Telecom Line Cards |
Use Scenario: Storing metrology algorithms and tariff tables in smart electricity meters subject to regulatory firmware revisions every 12–24 months. IC Role / Device Role / Timing Role: Field-reprogrammable firmware repository; 10,000-cycle endurance exceeds expected lifetime update count. Use Value: Sector-level programming allows over-the-air updates of only changed algorithm modules, minimizing transmission time and risk. | Use Scenario: Retaining port mapping, protocol settings, and calibration offsets across power cycles in carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Persistent configuration store with fast read access for initialization sequences. Use Value: 200 µA standby current extends hold-up time during brief AC outages; CMOS compatibility simplifies interface with FPGA configuration logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV160DB-70EC | 3.3V core with 5V I/O tolerance; 16 Mbit density; 70 ns access; CFI-compliant command set. | Requires level translation in pure 5V systems; larger capacity suits complex bootloaders but increases cost per bit. | Select when migrating to lower-voltage platforms or needing CFI standardization for multi-vendor toolchain support. |
| SST39VF020-70-4C-NHE | 3.3V supply only; 2 Mbit density; 70 ns access; single-power-supply sector erase; no hardware VCC sense. | Not pin-compatible; lacks 5V-only operation and VCC brown-out protection - unsuitable for legacy 5V industrial designs. | Choose only for new 3.3V designs where lower active current (30 mA vs. 60 mA) and smaller footprint are prioritized over 5V compatibility. |
Compared with AM29LV160DB-70EC and SST39VF020-70-4C-NHE, the AT29C1024-70TC uniquely supports true 5V-only operation with integrated VCC-sense hardware protection - making it the only option among the three qualified for retrofit into existing 5V controller boards without schematic changes.
Availability
AT29C1024-70TC is available at Aetrix Electronics and suitable for industrial controller firmware storage, PLC boot memory, and smart meter field-upgrade applications requiring stable component supply and long-term obsolescence management.
Supply support for AT29C1024-70TC 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, Flash memory, and secure authentication ICs for industrial and automotive markets.
The AT29C1024 product line was engineered specifically for 5V embedded systems requiring reliable, in-system reprogrammable nonvolatile storage - targeting applications where legacy voltage compatibility and robust data protection outweigh density or speed scaling.
FAQ
What is the maximum operating temperature range for the AT29C1024-70TC?
The AT29C1024-70TC is rated for commercial temperature operation from 0°C to 70°C. This specification is confirmed in the "DC and AC Operating Range" table on page 4 of the official Atmel datasheet (Rev. 0571A–10/98), where the -70TC suffix explicitly denotes the commercial temperature grade. Industrial variants (e.g., AT29C1024-70TI) support –40°C to +85°C but use different ordering codes.
Does the AT29C1024-70TC require high-voltage programming signals?
No, the AT29C1024-70TC does not require high-voltage programming signals. As stated in the "Description" section (page 1), it is a "5-volt-only" Flash memory - all programming commands execute using standard 5V logic levels. The device uses internal charge pumps and software-controlled command sequences (e.g., 5555h/2AAAh/A0A0h) instead of external 12V pulses, eliminating need for dedicated HV circuitry.
How many sectors does the AT29C1024-70TC have, and what is the size of each sector?
The AT29C1024-70TC contains 512 sectors, each consisting of 128 words (256 bytes). This is explicitly documented in the "Features" list on page 1 and reinforced in the "Device Operation" section (page 2), which states: "Reprogramming the AT29C1024 is performed on a sector basis; 128 words of data are loaded into the device and then simultaneously programmed." Each word is 16 bits wide, matching the 64K × 16 organization.
Can the AT29C1024-70TC be used in a system with TTL-level logic interfaces?
Yes, the AT29C1024-70TC is explicitly designed for CMOS and TTL compatibility. Per the "Features" list (page 1) and DC Characteristics table (page 4), its input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive capability (VOH = 2.4 V at –400 µA, VOL = 0.45 V at 2.1 mA) meet standard TTL voltage specifications. This allows direct connection to 5V TTL buses without level shifters.
What methods are available to detect completion of a program cycle on the AT29C1024-70TC?
The AT29C1024-70TC supports two confirmed end-of-program detection methods: DATA polling on I/O7 or I/O15 (where the complement of loaded data appears until completion), and TOGGLE bit monitoring on I/O6 or I/O14 (which toggles between 0 and 1 during programming and stops upon completion). Both are detailed in the "DATA POLLING" and "TOGGLE BIT" sections (pages 3 and 9) and validated in the AC characteristics tables.
AT29C1024-70TC 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:
- 1Mbit
- Memory Organization:
- 64K x 16
- 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:
- 48-TSOP
AT29C1024-70TC FAQ
1.How can I place an order for AT29C1024-70TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C1024-70TC 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 AT29C1024-70TC reliable?
The price and inventory of AT29C1024-70TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C1024-70TC is usually 5 days.
3.What payment methods are accepted for AT29C1024-70TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C1024-70TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C1024-70TC?
AT29C1024-70TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C1024-70TC 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 AT29C1024-70TC?
For technical support, including AT29C1024-70TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C1024-70TC requirements.
6.How does Aetrix verify that AT29C1024-70TC is sourced from the original manufacturer or authorized distributors?
All AT29C1024-70TC 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 AT29C1024-70TC meets industry standards.
7.What is the process for return or replacement of AT29C1024-70TC?
All AT29C1024-70TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C1024-70TC, 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 AT29C1024-70TC part is unused and in its original packaging.
Return procedure for AT29C1024-70TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29C1024-70TC Tags
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