My Inquiry
My Account
Microchip Technology AT49F002N-90JC
- Part No.:
- AT49F002N-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F002N-90JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,639
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F002N-90JC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 90 ns read access time, 10 µs/byte typical programming time, and sector-based architecture including a 16K-byte boot block with programmable lockout. It operates across commercial temperature range (0°C to 70°C) in a 32-lead PLCC package and is used for firmware storage and boot code retention in embedded controllers.
For engineers reviewing the AT49F002N-90JC datasheet, AT49F002N-90JC pinout, AT49F002N-90JC application, or AT49F002N-90JC equivalent, key selection considerations include its 5V single-supply operation, hardware data protection features, DATA polling/Toggle Bit end-of-program detection, and boot block lockout override via 12V RESET input.
Technical Context
The AT49F002N-90JC implements a command-register-based architecture requiring six-byte sequences for chip erase and sector erase, with internal timing eliminating external clocks. Its sector map comprises one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes).
It supports standard EPROM-like read interface (CE/OE/WE control), byte-by-byte programming with automatic pulse generation, and dual end-of-operation detection via DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling). Hardware protection includes VCC sense (<3.8V inhibit), noise filtering (<15 ns pulse rejection), and control-line gating (OE low/CE high/WE high inhibits programming).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 90 ns maximum - defines minimum bus cycle duration for reliable read operations |
| Byte Programming Time | 10 µs typical - enables rapid field updates without system interruption |
| Erase Cycle Time | 10 seconds maximum - determines minimum latency for sector or full-chip erasure |
| Active Current | 50 mA at 5 MHz - sets power budget for active read/write states |
| Standby Current | 100 µA CMOS - enables low-power retention in idle microcontroller systems |
| Endurance | 10,000 program/erase cycles - specifies usable lifetime under repeated firmware updates |
| Operating Voltage | 5.0 V ±10% - requires stable single-rail supply; no high-voltage programming needed |
Pinout & Package
AT49F002N-90JC is housed in a 32-lead Plastic J-leaded Chip Carrier (PLCC) package with pin 1 marked by index notch. Pin 1 is NC (Don't Connect) per device specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input |
| CE | Chip Enable | Active-low chip select; disables outputs and reduces current when high |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low control for write/program/erase command latching and execution |
| RESET | Reset Input | Active-low halts operations and forces high-Z outputs; 12V input overrides boot lockout |
| VCC | Power Supply | 5V ±10% main supply; powers core logic and I/O buffers |
| GND | Ground Reference | Common return path for all digital and power currents |
| DC | No Connect | Pin 1 is unconnected - must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16K-byte boot block (00000H–03FFFH) supports permanent secure code storage after lockout enable |
| Hardware Data Protection | VCC sense, noise filtering, and control-line gating prevent accidental writes during power transients or noise events |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection without polling overhead or timer dependencies |
| 5V-Only Reprogrammability | Eliminates need for external 12V programming supplies - simplifies system-level power design |
| Internal Program Timer | Automated pulse generation and timing removes requirement for precise external timing control |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing and updating firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding initialization code and real-time control routines executed on power-up. Use Value: Sector erase capability allows safe field updates of application code while preserving locked boot code integrity. | Use Scenario: Hosting bootloader and configuration images in enterprise-grade network routers requiring secure, field-upgradable firmware. IC Role / Device Role / Timing Role: Primary Flash memory mapped to CPU address space for XIP (execute-in-place) boot sequence. Use Value: 90 ns read access ensures minimal boot latency; boot lockout prevents corruption of critical startup instructions. |
| Medical Device Diagnostic Module | Automotive Body Control Unit |
Use Scenario: Storing calibration data and diagnostic firmware in portable medical instruments subject to regulatory traceability requirements. IC Role / Device Role / Timing Role: Parameter memory storing user-configurable thresholds and self-test algorithms. Use Value: Two independent 8K-byte parameter blocks support versioned configuration storage with atomic sector updates. | Use Scenario: Holding firmware for body control modules managing lighting, door locks, and window controls in passenger vehicles. IC Role / Device Role / Timing Role: In-system reprogrammable flash providing OTA update capability for ECU software revisions. Use Value: 10,000-cycle endurance and 5V-only operation meet automotive functional safety and supply constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-90EC | 48-pin TSOP package; 3.3V core with 5V I/O tolerance; 90 ns access; no RESET pin | Lacks 12V boot override and dedicated RESET input; requires level-shifting in pure 5V systems | Choose when migrating to lower-voltage designs or where PLCC footprint is unavailable |
| SST39VF020-90-4C-NHE | 32-pin TSOP; 3.3V supply; 90 ns access; 2 Mbit density; no boot lockout feature | Boot block protection absent; relies on software-only security; incompatible voltage domain | Prefer for cost-sensitive 3.3V systems where hardware boot protection is not required |
Compared with AM29LV002BT-90EC and SST39VF020-90-4C-NHE, the AT49F002N-90JC uniquely provides 5V-only operation with hardware-enforced boot block lockout and 12V RESET override-critical for legacy 5V industrial and automotive firmware architectures requiring tamper-resistant boot code.
Availability
AT49F002N-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, and automotive body control unit applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002N-90JC 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 semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication devices.
The AT49F002N series belongs to Atmel's 5V Flash memory product line, designed specifically for in-system reprogrammability in legacy 5V embedded systems requiring robust boot code protection and field firmware updates.
FAQ
What is the memory organization of the AT49F002N-90JC?
The AT49F002N-90JC contains 2 Mbit of Flash memory organized as 262,144 words × 8 bits (256K × 8). Its physical address space spans 00000H to 3FFFFH, partitioned into a 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This structure enables selective erasure and secure boot code isolation in the AT49F002N-90JC.
Does the AT49F002N-90JC support in-system programming without high-voltage supplies?
Yes, the AT49F002N-90JC supports full in-system reprogramming using only a 5V supply - no external 12V or 21V programming voltage is required. All commands (read, program, erase) are executed via standard 5V-level signals applied to CE, OE, WE, and address/data lines. This eliminates need for dedicated high-voltage circuitry and simplifies integration into 5V-only systems using the AT49F002N-90JC.
How is boot block protection enabled and overridden on the AT49F002N-90JC?
Boot block protection on the AT49F002N-90JC is enabled by issuing a six-cycle command sequence (5555H/AA, 2AAAH/55, 5555H/80, 5555H/AA, 2AAAH/55, 5555H/40). Once set, the 16K-byte boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5V. Override is achieved by applying 12.0V ±0.5V to the RESET pin, allowing chip/sector erase or byte programming - a capability exclusive to the AT49F002N-90JC and not present in AT49F002N(T) variants.
What are the valid operating temperature and supply conditions for the AT49F002N-90JC?
The AT49F002N-90JC is rated for commercial temperature operation from 0°C to 70°C and requires a VCC supply of 5.0V ±10% (4.5V to 5.5V). It draws 50 mA active current and 100 µA CMOS standby current. These specifications ensure compatibility with standard 5V TTL/CMOS logic families and stable operation in office, lab, and controlled industrial environments where the AT49F002N-90JC is deployed.
Can the AT49F002N-90JC be used as a direct replacement for EPROMs like the 27C020?
The AT49F002N-90JC is pin-compatible with 32-pin EPROMs such as the 27C020 in PLCC packages and uses identical CE/OE/WE control protocols for reading, enabling drop-in replacement in existing sockets. However, programming requires command sequences instead of UV erasure or high-voltage pulses, and the AT49F002N-90JC adds features like sector erase, DATA polling, and boot lockout not found in EPROMs - requiring minor firmware adaptation but no PCB change.
AT49F002N-90JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F002N-90JC FAQ
1.How can I place an order for AT49F002N-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002N-90JC 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 AT49F002N-90JC reliable?
The price and inventory of AT49F002N-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002N-90JC is usually 5 days.
3.What payment methods are accepted for AT49F002N-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002N-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002N-90JC?
AT49F002N-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002N-90JC 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 AT49F002N-90JC?
For technical support, including AT49F002N-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002N-90JC requirements.
6.How does Aetrix verify that AT49F002N-90JC is sourced from the original manufacturer or authorized distributors?
All AT49F002N-90JC 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 AT49F002N-90JC meets industry standards.
7.What is the process for return or replacement of AT49F002N-90JC?
All AT49F002N-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002N-90JC, 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 AT49F002N-90JC part is unused and in its original packaging.
Return procedure for AT49F002N-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002N-90JC 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…
