My Inquiry
My Account
Microchip Technology AT49F002-55PC
- Part No.:
- AT49F002-55PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002-55PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F002-55PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 55 ns read access time, sector-based architecture (16K-byte boot block + two 8K-byte parameter blocks + two main memory blocks), and hardware data protection. It operates across 0°C to 70°C and supports byte-by-byte programming at 10 µs/byte typical for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT49F002-55PC datasheet, AT49F002-55PC pinout, AT49F002-55PC application, or AT49F002-55PC equivalent, key selection considerations include its 55 ns read timing, boot block lockout capability, 10,000 write cycle endurance, CMOS standby current of 100 µA, and compatibility with standard EPROM-like CE/OE/WE control interface in legacy and industrial controller designs.
Technical Context
The AT49F002-55PC implements a command-register-based architecture requiring six-byte sequences for chip/sector erase and boot lockout enable, with internal timing eliminating external clocks. Its sector organization enables selective erasure of parameter blocks (8K × 2) and main memory blocks (96K + 128K), while the 16K boot block supports permanent lockout via 12V RESET override.
It uses standard microprocessor write timings with address latched on falling WE/CE edge and data on rising edge, supporting DATA polling (I/O7 complement) and toggle-bit (I/O6) methods for program/erase completion detection. Hardware protection includes VCC sense (<3.8V inhibit), noise filtering (<15 ns pulse rejection), and control-line gating (OE low/CE high/WE high disables programming).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling full firmware image storage for 8-bit MCUs with space for bootloader + application code |
| Read Access Time | 55 ns - meets real-time interrupt response requirements in industrial PLCs and motor controllers |
| Byte Programming Time | 10 µs typical - allows rapid field updates of configuration parameters without system downtime |
| Erase Cycle Time | 10 seconds max - supports efficient in-system reprogramming during maintenance windows |
| Endurance | 10,000 write/erase cycles - sufficient for firmware revision management over 10+ year product lifecycles |
| Standby Current | 100 µA CMOS - enables low-power operation in battery-backed or energy-harvesting sensor nodes |
| Operating Voltage | 5V ±10% - compatible with legacy 5V logic families and eliminates need for auxiliary voltage rails |
Pinout & Package
AT49F002-55PC is supplied in a 32-pin, 0.600" wide plastic dual inline package (PDIP), pin-compatible with industry-standard EPROM sockets and supporting through-hole PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for standard access, A17 selects upper/lower half in sector commands |
| CE | Chip Enable | Active-low chip select; when high, forces outputs to high-impedance state to prevent bus contention in multi-device systems |
| OE | Output Enable | Active-low output gate; used with CE for flexible read timing control and shared-bus arbitration |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles |
| I/O0–I/O7 | Data I/O Bus | Bi-directional 8-bit data path; supports true read-modify-write operations and DATA polling on I/O7 |
| RESET | Reset Control | Active-low reset input; halts ongoing operations and forces high-Z outputs; 12V input enables boot block override |
| VCC / GND | Power Supply | 5V supply and ground pins; decoupling required within 1 cm due to 50 mA active current and fast switching transients |
| DC | No Connect | Pin 1 in DIP package - must remain unconnected per datasheet; not tied to any internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Enables independent erasure of 8K parameter blocks and 96K/128K main memory blocks - critical for safe firmware field updates without corrupting bootloader |
| Boot Block Lockout | 16K-byte region (00000H–03FFFH) can be permanently write-protected via command sequence - ensures bootloader integrity in unattended systems |
| Hardware Data Protection | VCC sense, noise filtering, and control-line gating prevent accidental writes during power-up/down or EMI events - eliminates need for external write-enable logic |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide software-detectable program/erase completion - removes dependency on fixed timing delays in host firmware |
| Single 5V Supply | Eliminates requirement for +12V or +25V programming voltages - simplifies power design and enables direct connection to 5V MCU buses |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Nonvolatile program memory providing 55 ns read access to support deterministic scan-cycle execution in real-time control loops. Use Value: Sector erase capability allows updating application logic without disturbing the protected 16K boot block containing safety-critical startup routines. | Use Scenario: Hosting bootloader code in 8-bit microcontroller-based medical devices where firmware must survive 10+ years of field operation with infrequent updates. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory serving as primary code storage with hardware write protection against corruption during brown-out conditions. Use Value: 100 µA CMOS standby current extends battery life in backup-powered configurations, while 10,000-cycle endurance supports lifetime field upgrades. |
| Automotive Diagnostic Tool Memory | Point-of-Sale Terminal Configuration Storage |
Use Scenario: Storing diagnostic protocol stacks and vehicle-specific calibration data in handheld OBD-II scanners operating across automotive temperature ranges. IC Role / Device Role / Timing Role: Parameter block memory (two 8K sections) holding modifiable calibration tables accessed via standard microprocessor bus interface. Use Value: Byte-programmable architecture enables field updates of individual calibration values without full device reflash, reducing service time. | Use Scenario: Retaining localized language packs, tax rate tables, and peripheral driver configurations in retail POS terminals subject to regional regulatory changes. IC Role / Device Role / Timing Role: Field-updatable nonvolatile memory interfaced to 8051-family controllers using CE/OE/WE control signals identical to EPROMs. Use Value: 5V-only operation eliminates level-shifting components, and DC pin (pin 1) simplifies PCB layout by removing routing constraints for unused terminals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-55EC | 3V/5V dual-voltage operation; 55 ns access; 2 Mbit density; different command set and sector map (64K boot + 32K parameter) | Requires voltage translation in pure 5V systems; boot block size and address range differ - firmware porting needed | Select if future migration to 3.3V systems is planned; verify RESET pin behavior and sector erase compatibility with existing host code |
| MX29LV002CTTI-55G | 5V-only; 55 ns access; same 2 Mbit density; supports CFI query but lacks 12V RESET override for boot block unlock | No hardware boot block override - lockout is irreversible once enabled; requires redesign if field recovery of corrupted bootloader is essential | Prefer for cost-sensitive applications where boot block permanence is acceptable; confirm absence of 12V RESET requirement in system safety analysis |
Compared with AM29LV002BT-55EC and MX29LV002CTTI-55G, the AT49F002-55PC uniquely combines 5V-only simplicity, 12V-enabled boot block recovery, and exact 16K/8K/96K/128K sector partitioning - making it optimal for legacy 5V systems requiring guaranteed bootloader recoverability.
Availability
AT49F002-55PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system bootloader, and automotive diagnostic tool memory requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002-55PC 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 AT49F002 series was designed as a drop-in EPROM replacement offering in-system reprogrammability for 8-bit embedded systems, targeting cost-sensitive applications needing reliable firmware storage without high-voltage programming infrastructure.
FAQ
What is the maximum operating temperature range for the AT49F002-55PC?
The AT49F002-55PC is rated for commercial operation from 0°C to 70°C. Its PDIP package and 55 ns timing bin are specified under this temperature range, with DC and AC parameters fully guaranteed. Industrial-grade variants (e.g., AT49F002-55PI) extend to −40°C to +85°C, but the -55PC suffix confirms commercial temperature compliance.
Does the AT49F002-55PC require high-voltage programming signals?
No, the AT49F002-55PC operates with single 5V supply only for both read and reprogramming functions. All command sequences-including byte programming, sector erase, and boot lockout-use standard 5V logic levels. The 12V signal applied to RESET is strictly for overriding boot block protection and is not used during normal programming.
How is the boot block protected on the AT49F002-55PC?
The AT49F002-55PC boot block (16K bytes, addresses 00000H–03FFFH) is protected via a six-byte command sequence that enables permanent lockout. Once activated, programming and erasure of this region are inhibited at 5V. Recovery requires applying 12V ±0.5V to the RESET pin, a feature absent in N(T) variants but confirmed for the base AT49F002 family including AT49F002-55PC.
What package type does the AT49F002-55PC use?
The AT49F002-55PC uses a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated as package code 32P6 in Atmel's ordering information. Pin 1 is marked and designated as "DC" (Don't Connect), requiring no PCB connection, and the package is compatible with standard EPROM sockets for prototyping and repair.
Can the AT49F002-55PC be used as a direct replacement for standard EPROMs?
Yes, the AT49F002-55PC is designed as an EPROM-compatible Flash memory with identical pinout, CE/OE/WE control interface, and read timing. It asserts valid data when CE and OE are low and WE is high, and places outputs in high-impedance state when CE or OE is high - matching standard EPROM behavior while adding in-system reprogrammability without hardware modifications.
AT49F002-55PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002-55PC FAQ
1.How can I place an order for AT49F002-55PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-55PC 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 AT49F002-55PC reliable?
The price and inventory of AT49F002-55PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-55PC is usually 5 days.
3.What payment methods are accepted for AT49F002-55PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-55PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-55PC?
AT49F002-55PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-55PC 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 AT49F002-55PC?
For technical support, including AT49F002-55PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-55PC requirements.
6.How does Aetrix verify that AT49F002-55PC is sourced from the original manufacturer or authorized distributors?
All AT49F002-55PC 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 AT49F002-55PC meets industry standards.
7.What is the process for return or replacement of AT49F002-55PC?
All AT49F002-55PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-55PC, 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 AT49F002-55PC part is unused and in its original packaging.
Return procedure for AT49F002-55PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002-55PC 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…
