My Inquiry
My Account
Microchip Technology AT49F002NT-12TC
- Part No.:
- AT49F002NT-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F002NT-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,071
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F002NT-12TC from Atmel is a 5V-only, 2-Mbit (256K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 120 ns read access time, supports sector-based erase (boot, parameter, and main memory blocks), features hardware data protection, and enables byte-by-byte programming at 10 µs/byte typical - ideal for firmware update applications in industrial controllers.
For engineers reviewing the AT49F002NT-12TC datasheet, AT49F002NT-12TC pinout, AT49F002NT-12TC application, or AT49F002NT-12TC equivalent, key selection considerations include its 16K-byte boot block with lockout override via 12V RESET, 10,000 write cycles endurance, CMOS standby current of 100 µA, and compatibility with standard microprocessor bus timing.
Technical Context
The AT49F002NT-12TC implements a command-register-based architecture requiring six-byte sequences for chip/sector erase and boot lockout enable. Its internal program control logic eliminates external high-voltage programming supplies, relying solely on 5V-level signals (CE/OE/WE) and address latching on falling edges of CE or WE.
Memory organization is partitioned into one 16K-byte boot block (address range 3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). The device supports DATA polling (I/O7 complement) and toggle-bit (I/O6) methods to detect program/erase completion without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 8-bit microcontroller data buses without glue logic. |
| Read Access Time | 120 ns max - meets timing requirements for 8 MHz Z80, 8051, and similar legacy microcontrollers in commercial temperature range. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of small configuration or calibration data segments. |
| Erase Cycle Time | 10 seconds max for full chip - allows predictable firmware recovery windows during system maintenance. |
| Endurance | 10,000 program/erase cycles - sufficient for infrequent firmware upgrades over 10+ year product lifecycles. |
| Standby Current | 100 µA CMOS - supports low-power sleep modes in battery-backed or energy-constrained embedded devices. |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V logic families and eliminates need for voltage translation circuitry. |
Pinout & Package
AT49F002NT-12TC is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 1 is located at top-left corner (index mark adjacent), with pin 16 as VCC and pin 32 as GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A15 used for byte selection within 64K pages. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K microcontrollers; high-impedance when CE or OE is inactive. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data outputs independently - essential for multiplexed bus arbitration. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - enables standard microprocessor write timing compliance. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-impedance outputs; 12V input overrides boot block lockout - critical for secure recovery paths. |
| DC | No-Connect | Pin 9 in TSOP package is unconnected - must be left floating or tied to ground per layout guidelines to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16K-byte boot block (3C000H–3FFFFH) can be permanently write-protected via command sequence - ensures bootloader integrity during field firmware updates. |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin unlocks protected boot block for chip/sector erase or byte programming - provides secure recovery without hardware redesign. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and triple-control inhibit (OE low/CE high/WE high) prevent accidental writes - enhances field reliability. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, software-driven program/erase status detection - eliminates need for fixed delay timers or external monitoring circuits. |
| Single 5V Supply Operation | Eliminates requirement for +12V or +25V programming voltages - simplifies power design and reduces BOM count in cost-sensitive industrial controls. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers subject to periodic field updates via serial port. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase capability; boot block holds bootloader, main blocks hold application firmware. Use Value: 10,000-cycle endurance and 120 ns read speed ensure reliable operation across 15+ years of scheduled maintenance cycles without performance degradation. | Use Scenario: Retaining calibrated sensor offsets and regulatory-compliant device settings in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Parameter storage with dual 8K-byte blocks enabling A/B configuration swapping during calibration sessions. Use Value: Hardware data protection and 100 µA standby current prevent unintended writes during brown-out events and extend battery life between recalibrations. |
| Automotive Body Control Module | Legacy Industrial HMI Display |
Use Scenario: Holding lighting control algorithms and CAN node configuration in under-hood body control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory interfaced to 8-bit MCU via parallel bus; operates in industrial temperature grade. Use Value: 12V RESET override enables secure reflash of boot code after ECU tamper detection, meeting ISO 11898-1 functional safety requirements. | Use Scenario: Storing display fonts, menu structures, and localized language strings in factory-floor HMIs based on Z80 or 8051 processors. IC Role / Device Role / Timing Role: Read-optimized Flash memory with 120 ns access time synchronized to 8 MHz CPU clock. Use Value: Pin-compatible replacement for EPROMs (e.g., 27C256), eliminating UV erasers and enabling in-situ firmware patches without board removal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-120EC | 4 Mbit density, 3.0–3.6V supply, 120 ns access, no 12V RESET override | Requires 3.3V supply rail and level-shifting for 5V systems; lacks boot block unlock mechanism | Select only if migrating to 3.3V architecture and accepting loss of secure recovery path. |
| SST39VF020-120-4C-NHE | 2 Mbit, 3.0–3.6V supply, 120 ns access, 100 µA standby, no RESET override | Not 5V-tolerant; requires voltage translation; boot protection relies on software-only lock bits | Preferable for new 3.3V designs where lower active power (25 mA vs. 50 mA) is critical and secure hardware override is unnecessary. |
Compared with AM29LV002BT-120EC and SST39VF020-120-4C-NHE, the AT49F002NT-12TC uniquely supports true 5V-only operation with hardware-enforced boot block security and 12V-assisted recovery - making it irreplaceable in legacy 5V industrial systems requiring field-serviceable firmware integrity.
Availability
AT49F002NT-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT49F002NT-12TC 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, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49F002NT-12TC belongs to Atmel's legacy 5V Flash memory product line, designed specifically for drop-in replacement of EPROMs and EEPROMs in existing 8-bit embedded systems requiring in-system reprogrammability without voltage translation.
FAQ
What is the memory organization of the AT49F002NT-12TC?
The AT49F002NT-12TC contains 2 Mbit (256K × 8) of Flash memory organized into one 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This sector architecture enables selective erase and programming - a key feature distinguishing the AT49F002NT-12TC from uniform-block Flash devices.
Does the AT49F002NT-12TC require high-voltage programming signals?
No, the AT49F002NT-12TC operates exclusively at 5V for both read and programming functions. It uses internal charge pumps and command sequences instead of external +12V or +25V programming voltages. This 5V-only operation is a core specification of the AT49F002NT-12TC and eliminates the need for additional voltage rails in legacy 5V systems.
How is boot block protection enabled and overridden on the AT49F002NT-12TC?
Boot block protection on the AT49F002NT-12TC is enabled via a six-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once set, the 16K boot block becomes permanently write-protected at ≤5.5V. However, applying 12V ±0.5V to the RESET pin overrides this lock, allowing reprogramming - a unique hardware recovery feature of the AT49F002NT-12TC.
What package type is used for the AT49F002NT-12TC?
The AT49F002NT-12TC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), designated as package code "32T". This surface-mount package supports automated assembly and is pin-compatible with industry-standard 32-pin Flash memory footprints, including those used for 27C256 EPROM replacements.
Can the AT49F002NT-12TC be used as a direct replacement for EPROMs like the 27C256?
Yes, the AT49F002NT-12TC is functionally and pin-compatible with the 27C256 EPROM in read mode (CE/OE/WE control, same address/data bus), but adds in-system reprogrammability without UV erasure. Its 120 ns access time matches common 27C256-12 variants, and the TSOP package fits standard 28-pin DIP sockets with adapter boards - making the AT49F002NT-12TC a practical upgrade path.
AT49F002NT-12TC 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49F002NT-12TC FAQ
1.How can I place an order for AT49F002NT-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002NT-12TC 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 AT49F002NT-12TC reliable?
The price and inventory of AT49F002NT-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002NT-12TC is usually 5 days.
3.What payment methods are accepted for AT49F002NT-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002NT-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002NT-12TC?
AT49F002NT-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002NT-12TC 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 AT49F002NT-12TC?
For technical support, including AT49F002NT-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002NT-12TC requirements.
6.How does Aetrix verify that AT49F002NT-12TC is sourced from the original manufacturer or authorized distributors?
All AT49F002NT-12TC 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 AT49F002NT-12TC meets industry standards.
7.What is the process for return or replacement of AT49F002NT-12TC?
All AT49F002NT-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002NT-12TC, 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 AT49F002NT-12TC part is unused and in its original packaging.
Return procedure for AT49F002NT-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002NT-12TC 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…
