My Inquiry
My Account
Microchip Technology AT29C1024-12JI
- Part No.:
- AT29C1024-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT29C1024-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,704
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29C1024-12JI 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 120 ns read access time, 10 ms sector program cycle time, 60 mA active current, and supports hardware/software data protection across industrial temperature range (–40°C to +85°C).
For engineers reviewing the AT29C1024-12JI datasheet, AT29C1024-12JI pinout, AT29C1024-12JI application, or AT29C1024-12JI equivalent, key selection considerations include sector-based programming architecture, DATA polling and toggle-bit end-of-write detection, CMOS/TTL I/O compatibility, and PLCC-44 packaging with verified 44-pin J-lead configuration.
Technical Context
The AT29C1024-12JI implements a sector-erase Flash architecture with 512 independent sectors (128 words/sector), enabling selective reprogramming without full-chip erase. Internal address/data latches hold 128 words during load, decoupling bus activity from internal erase-program timing.
It uses dual-line chip enable (CE) and output enable (OE) control for bus contention management, and integrates VCC sense, power-on delay, noise filtering, and software command sequences (e.g., 5555h/2AAAh/A0A0h) to prevent inadvertent writes - all operating within a single 5V ±10% supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (65,536 × 16), enabling firmware storage for mid-complexity microcontrollers |
| Read Access Time | 120 ns max - defines minimum CPU wait-state requirement for zero-wait-state operation at ≤8.3 MHz |
| Sector Program Time | 10 ms typical - sets minimum firmware update latency per 256-byte sector |
| VCC Supply Range | 5 V ± 10% - compatible with standard 5V logic rails without regulation overhead |
| Active Current | 60 mA max - determines peak power budget (330 mW @ 5.5V) for system thermal design |
| Standby Current | 200 µA CMOS - enables low-power retention in battery-backed systems |
| Endurance | >10,000 write/erase cycles per sector - supports field-upgradable firmware with multi-year service life |
| Operating Temp | –40°C to +85°C - qualified for industrial control, automotive body electronics, and telecom infrastructure |
Pinout & Package
AT29C1024-12JI is packaged in a 44-lead Plastic J-Leaded Chip Carrier (PLCC-44), JEDEC MS-018 AA compliant, with 1.27 mm pitch and surface-mount footprint. Pin 1 identified by corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; A7–A15 select sector, A0–A6 select 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-bit detection on I/O6/I/O14 |
| CE | Chip Enable | Active-low global device select; must be low for read, program, or identification modes |
| OE | Output Enable | Active-low output gate; high-Z state prevents bus contention when disabled |
| WE | Write Enable | Active-low control for data loading and sector programming initiation |
| VCC | Power Supply | Single 5V supply input; includes internal VCC sense circuitry for write inhibition below 3.8V |
| VSS | Ground | Two dedicated ground pins (pins 23 and 36) reduce ground bounce during high-speed reads |
| NC / DC | No Connect / Don't Connect | Unbonded or reserved pins (e.g., pins 1, 8, 25, 30, 31, 32, 39, 40, 43, 44); must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Sector Program Operation | Enables field firmware updates without full-chip erase; 512 sectors allow granular code patching |
| DATA Polling & Toggle Bit | Hardware-supported end-of-write detection via I/O7/I/O15 (data complement) or I/O6/I/O14 (toggle), eliminating need for fixed delays |
| Hardware Data Protection | VCC sense, 5 ms power-on delay, and noise filtering prevent spurious writes during brown-out or EMI events |
| Software Data Protection | User-configurable lock via 3-word command sequence (5555h/2AAAh/A0A0h), persisting across power cycles |
| Product Identification Mode | Hardware/software entry (5555h/2AAAh/9090h) returns manufacturer code 1Fh and device code 25h for automated BOM validation |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with in-system reprogrammability; 120 ns access supports real-time scan cycle execution. Use Value: Enables remote firmware patches without hardware replacement; 10,000-cycle endurance supports multi-year maintenance cycles. | Use Scenario: Holding configuration data and calibration tables for door module ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Parameter storage with robust write protection; operates reliably across –40°C to +85°C ambient. Use Value: Hardware VCC sensing and noise filtering prevent corruption during vehicle cranking transients. |
| Telecom Line Card Boot Memory | Medical Diagnostic Equipment BIOS |
Use Scenario: Boot code storage for DSP-based line cards in carrier-grade DSLAMs requiring field-upgradable feature sets. IC Role / Device Role / Timing Role: Primary boot ROM accessed at power-on reset; sector programming allows incremental feature deployment. Use Value: 512-sector granularity permits partial updates without disrupting active services; CMOS standby current minimizes idle power draw. | Use Scenario: Storing safety-critical BIOS and self-test routines in portable ultrasound imaging devices. IC Role / Device Role / Timing Role: Secure firmware repository with dual-layer (hardware + software) write protection to meet IEC 62304 requirements. Use Value: Software protection algorithm prevents unauthorized modification; product ID mode validates part authenticity during manufacturing test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV160DBTI-70G | 3.3V-only supply; 16 Mbit density; 70 ns access; CFI-compliant command set | Requires level-shifting in 5V systems; larger capacity suits complex bootloaders | Select if migrating to lower-voltage platforms or needing >1 Mbit storage |
| EN29LV160AB-70TP | 3.3V supply; 16 Mbit; 70 ns access; supports both top/bottom boot-block architecture | Not pin-compatible; different sector map and protection register layout | Choose for new designs prioritizing boot-block flexibility and JEDEC-standardized interfaces |
Compared with AT29C1024-12JI, MX29LV160DBTI-70G and EN29LV160AB-70TP offer higher density and faster access but require 3.3V operation and lack native 5V compatibility - making AT29C1024-12JI the only direct 5V-only, PLCC-44 Flash solution for legacy industrial and automotive 5V systems requiring sector-level reprogrammability.
Availability
AT29C1024-12JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, and telecom line card boot memory requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT29C1024-12JI 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 product line delivers 5V-only Flash memory optimized for in-system reprogrammability in legacy 5V embedded systems where voltage compatibility, sector granularity, and industrial temperature operation are critical.
FAQ
What is the maximum read access time specified for AT29C1024-12JI?
The AT29C1024-12JI has a maximum read access time of 120 ns, as indicated by the "12" suffix in its ordering code. This parameter is guaranteed over the full industrial temperature range (–40°C to +85°C) and 5V ±10% supply, defining the minimum timing window for reliable data capture by host controllers.
Does AT29C1024-12JI support in-system programming without high-voltage supplies?
Yes, AT29C1024-12JI supports full in-system reprogramming using only a single 5V ±10% supply - no external 12V or 12.5V programming voltage is required. All sector erase and program operations are initiated via standard 5V command sequences applied to the address and data bus.
How many sectors does AT29C1024-12JI contain, and what is the size of each sector?
The AT29C1024-12JI contains 512 sectors, each consisting of 128 words (256 bytes). This sector structure enables selective reprogramming: only sectors containing modified firmware or data need to be erased and rewritten, preserving unchanged code sections.
What methods does AT29C1024-12JI provide to detect completion of a program cycle?
AT29C1024-12JI provides two hardware-supported methods: DATA polling (monitoring complemented data on I/O7 or I/O15) and toggle-bit detection (observing toggling on I/O6 or I/O14). Both methods eliminate reliance on fixed timing delays and allow dynamic synchronization with the internal 10 ms program cycle.
Is AT29C1024-12JI pin-compatible with other variants in the AT29C1024 family?
Yes, all AT29C1024 variants - including AT29C1024-70JI, AT29C1024-90JI, and AT29C1024-15JI - share identical PLCC-44 pinouts and electrical interface definitions. The numeric suffix (70/90/12/15) denotes read access speed grade only; functionality, sector architecture, and command set are fully consistent across the family.
AT29C1024-12JI 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:
- 120 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)
AT29C1024-12JI FAQ
1.How can I place an order for AT29C1024-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C1024-12JI 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 AT29C1024-12JI reliable?
The price and inventory of AT29C1024-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C1024-12JI is usually 5 days.
3.What payment methods are accepted for AT29C1024-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C1024-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C1024-12JI?
AT29C1024-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C1024-12JI 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 AT29C1024-12JI?
For technical support, including AT29C1024-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C1024-12JI requirements.
6.How does Aetrix verify that AT29C1024-12JI is sourced from the original manufacturer or authorized distributors?
All AT29C1024-12JI 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 AT29C1024-12JI meets industry standards.
7.What is the process for return or replacement of AT29C1024-12JI?
All AT29C1024-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29C1024-12JI, 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 AT29C1024-12JI part is unused and in its original packaging.
Return procedure for AT29C1024-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29C1024-12JI 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…
