My Inquiry
My Account
Microchip Technology AT29C1024-70JI
- Part No.:
- AT29C1024-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT29C1024-70JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,657
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29C1024-70JI from Atmel is a 5-V-only, 1-Mbit (64K × 16) Flash memory IC designed for in-system reprogrammability in embedded controllers and industrial firmware storage. It delivers 70 ns read access time, supports sector-based programming with 512 sectors (128 words/sector), and operates across -40°C to +85°C with 200 µA CMOS standby current.
For engineers reviewing the AT29C1024-70JI datasheet, AT29C1024-70JI pinout, AT29C1024-70JI application, or AT29C1024-70JI equivalent, this device serves as a drop-in replacement for EPROM-based boot code storage where low-power, field-upgradable nonvolatile memory with hardware/software data protection is required.
Technical Context
The AT29C1024-70JI implements sector erase-and-program architecture using internal latches to hold 128 words during programming, freeing the address/data bus mid-cycle. Its dual data protection-hardware VCC-sense and software command sequence (AAA/555/2AA/A0A)-prevents inadvertent writes during power transitions or noise events.
It uses standard parallel interface timing: CE/OE/WE control logic enables EPROM-like read operation, while program initiation requires precise 150 µs word-load window and DATA polling on I/O7/I/O15 or toggle-bit detection on I/O6/I/O14 to confirm completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (64K × 16 words); supports 16-bit data bus interface without external multiplexing. |
| Read Access Time | 70 ns max; enables direct execution from flash in 8/16-bit microcontroller systems with ≤14 MHz bus timing. |
| Sector Architecture | 512 sectors × 128 words; allows granular firmware updates without full-chip erase, reducing field upgrade time. |
| Programming Cycle | 10 ms per sector; deterministic internal timer eliminates need for external timing circuitry. |
| Supply Voltage | 5 V ± 10%; compatible with legacy 5V TTL/CMOS logic families without level-shifting. |
| Standby Current | 200 µA typical; meets low-power requirements for battery-backed or energy-sensitive industrial modules. |
| Endurance | >10,000 write/erase cycles per sector; suitable for applications requiring frequent firmware patching. |
Pinout & Package
AT29C1024-70JI is packaged in a 44-lead Plastic J-Leaded Chip Carrier (PLCC), pin-compatible with industry-standard 44J footprint and socketable for prototyping and rework.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; A0–A6 select word within sector, A7–A15 select sector (512 total). |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; supports DATA polling on I/O7/I/O15 and toggle-bit detection on I/O6/I/O14. |
| CE | Chip Enable | Active-low chip select; must be low for read or program; high disables outputs and enters standby. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads. |
| WE | Write Enable | Active-low write strobe; controls data loading and initiates sector programming when CE is low. |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers; VCC sense circuit inhibits programming if <3.8 V. |
| VSS | Ground | Two dedicated ground pins (pins 13 and 30 in PLCC) reduce noise coupling and improve signal integrity. |
| NC / DC | No Connect / Don't Connect | Unbonded pins (e.g., pins 1, 8, 25, 31, 40, 44); must remain unconnected per design specification. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Reprogramming | Eliminates need for +12V programming voltage, enabling in-circuit updates via standard system power rail. |
| Hardware Data Protection | VCC-sense and 5 ms power-on delay prevent spurious writes during brown-out or startup transients. |
| Software Data Protection | Three-command unlock sequence (5555H/2AAAH/A0A0H) ensures firmware updates require explicit host authorization. |
| DATA Polling & Toggle Bit | Dual end-of-program detection methods allow flexible polling strategy without external wait-state logic. |
| CMOS/TTL Compatibility | Input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive (IOH = –400 µA, IOL = 2.1 mA) support mixed-logic designs. |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing 70 ns read access to initialize microcontroller execution and retain calibration data across power cycles. Use Value: 200 µA standby current extends uptime in battery-buffered backup modes; sector erase enables field updates without replacing entire controller module. | Use Scenario: Holding boot loader and safety-critical initialization routines in engine control units operating from –40°C to +85°C under high EMI conditions. IC Role / Device Role / Timing Role: Parallel-interface Flash memory mapped into MCU address space for XIP (execute-in-place) startup sequence. Use Value: Hardware VCC-sense and noise-filtered WE/CE inputs prevent corruption during vehicle cranking transients; >10,000 endurance supports lifetime recalibration cycles. |
| Medical Device Configuration Memory | Telecom Line Card Firmware |
Use Scenario: Retaining user-defined therapy settings and device calibration constants in portable diagnostic equipment requiring regulatory-compliant data retention. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with software lock enabled by host processor before each update cycle. Use Value: Dual protection (hardware + software) meets IEC 62304 traceability requirements; 10 ms sector programming minimizes downtime during service-mode updates. | Use Scenario: Storing protocol stack binaries and hardware abstraction layer code in carrier-grade DSLAM line cards with hot-swap capability. IC Role / Device Role / Timing Role: Field-upgradable firmware repository accessed via 16-bit local bus; supports concurrent read-while-program via internal latching. Use Value: Internal address/data latches free bus during 10 ms programming window, enabling background diagnostics or status reporting without interrupting host operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV160DB-70EI | 3.3 V core (5 V tolerant I/O); 16 Mbit density; CFI-compliant command set; no hardware VCC-sense. | Requires level-shifting for pure 5 V systems; larger capacity suits complex bootloaders but increases cost and layout area. | Select when migrating to lower-voltage platforms or needing CFI standardization; not pin-compatible with AT29C1024-70JI. |
| SST39VF1601-70-4C-EKE | 3.3 V only; 16 Mbit; single-power-supply sector erase; lacks software data protection algorithm. | Not suitable for 5 V legacy systems; higher density enables multi-image storage but removes Atmel's dual-protection scheme. | Choose for new 3.3 V designs prioritizing density over legacy compatibility; requires redesign of protection logic in host firmware. |
Compared with AM29LV160DB-70EI and SST39VF1601-70-4C-EKE, the AT29C1024-70JI offers native 5 V operation, proven dual-layer data protection, and direct EPROM replacement fit-making it optimal for maintaining existing industrial hardware while enabling field firmware upgrades without board revision.
Availability
AT29C1024-70JI is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostic instruments, and telecom line cards requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT29C1024-70JI 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, automotive, and consumer applications.
The AT29C1024-70JI belongs to Atmel's legacy parallel Flash memory product line, engineered for seamless EPROM replacement in systems demanding reliable, in-system reprogrammability without high-voltage programming infrastructure.
FAQ
What is the operating temperature range for the AT29C1024-70JI?
The AT29C1024-70JI is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in the Ordering Information table (page 12) and supported by DC/AC characterization data across that span. The 'I' suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial-grade variants like AT29C1024-70JC.
Does the AT29C1024-70JI require external high-voltage programming signals?
No, the AT29C1024-70JI does not require external high-voltage programming signals. It operates with a single 5 V ±10% supply for both read and program functions. Programming is initiated using standard 5 V logic levels and specific command sequences-no +12 V or other elevated voltages are needed, as stated in the Features section and Device Operation description.
How many sectors does the AT29C1024-70JI have, and what is the sector size?
The AT29C1024-70JI contains 512 sectors, each consisting of 128 words (256 bytes). This is explicitly documented in the Features list and reinforced in the Sector Program Operation description. Each sector can be erased and programmed independently, enabling targeted firmware updates without affecting unrelated memory regions.
What package type is used for the AT29C1024-70JI?
The AT29C1024-70JI uses a 44-lead Plastic J-Leaded Chip Carrier (PLCC), designated as package type "44J" in the Ordering Information table (page 12). This is verified by the Pin Configurations section showing PLCC top view with 44 pins and matching mechanical dimensions in Packaging Information (page 13).
Can the AT29C1024-70JI be used as a direct replacement for standard EPROMs like the 27C1024?
Yes, the AT29C1024-70JI is functionally and pinout-compatible with the 27C1024 EPROM in read mode, supporting identical CE/OE/WE control and 64K × 16 organization. However, programming requires different command protocols and no UV erasure-so while it replaces EPROMs in circuit, host firmware must implement Flash-specific write algorithms instead of EPROM-style programming.
AT29C1024-70JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT29C1024-70JI FAQ
1.How can I place an order for AT29C1024-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C1024-70JI 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 AT29C1024-70JI reliable?
The price and inventory of AT29C1024-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C1024-70JI is usually 5 days.
3.What payment methods are accepted for AT29C1024-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C1024-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C1024-70JI?
AT29C1024-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C1024-70JI 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 AT29C1024-70JI?
For technical support, including AT29C1024-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C1024-70JI requirements.
6.How does Aetrix verify that AT29C1024-70JI is sourced from the original manufacturer or authorized distributors?
All AT29C1024-70JI 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 AT29C1024-70JI meets industry standards.
7.What is the process for return or replacement of AT29C1024-70JI?
All AT29C1024-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C1024-70JI, 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 AT29C1024-70JI part is unused and in its original packaging.
Return procedure for AT29C1024-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29C1024-70JI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
