My Inquiry
My Account
Microchip Technology AT49F002-70PC
- Part No.:
- AT49F002-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002-70PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,484
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F002-70PC 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 55 ns read access time, supports byte-by-byte programming (10 µs/byte typical), features sector-based architecture with 16K-byte boot block and hardware data protection, and operates across 0°C to 70°C commercial temperature range.
For engineers reviewing the AT49F002-70PC datasheet, AT49F002-70PC pinout, AT49F002-70PC application, or AT49F002-70PC equivalent, key selection considerations include its 5V-only operation, boot block lockout capability, 10,000 write cycles endurance, fast 10-second chip erase, and compatibility with standard EPROM-style CE/OE/WE control interface in legacy 8-bit bus systems.
Technical Context
The AT49F002-70PC implements a command-based Flash architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal program control logic eliminates external high-voltage programming circuitry, enabling true 5V-only in-system reprogramming via standard microprocessor timing.
Memory organization includes four distinct sectors: one 16K-byte boot block (address 00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K + 128K bytes). Sector erase and chip erase are internally timed, with DATA polling (I/O7 complement) and toggle bit (I/O6) providing cycle completion detection without external clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly replaces 27C020 EPROMs in 8-bit address/data bus designs. |
| Read Access Time | 70 ns max - meets timing requirements for 14 MHz Z80 or 8 MHz 8051 systems with standard wait-state logic. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of configuration parameters without system interruption. |
| Erase Cycle Time | 10 seconds max for full chip erase - allows predictable firmware recovery during production programming or field service. |
| Endurance | 10,000 program/erase cycles - supports frequent firmware revision in industrial HMI or telecom line card applications. |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for low-power battery-backed systems requiring persistent storage. |
| Operating Voltage | 5.0 V ±10% - eliminates need for dual-voltage regulators in legacy 5V logic environments. |
Pinout & Package
AT49F002-70PC is supplied in a 32-pin, 0.600" wide plastic dual inline package (PDIP), pin-compatible with industry-standard 27C020 EPROMs and compatible with existing socketed 32-pin DIP footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for byte-level access, A17 selects upper/lower half. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read/write operations; high-impedance when CE or OE is inactive to prevent bus contention. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - enables multi-chip memory decoding. |
| OE | Output Enable | Active-low output control; used with CE to gate data onto bus - provides flexible timing control to avoid bus conflicts. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - essential for entering programming/erase modes. |
| RESET | Reset Input | Active-low reset; forces outputs to high-Z and halts ongoing operations - also accepts 12V override to unlock boot block when lockout is enabled. |
| VCC / GND | Power Supply | 5V supply and ground pins; decoupling required within 1 inch of package per JEDEC guidelines for stable read/write margins. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V or +21V programming voltage generators - simplifies PCB layout and reduces BOM cost in retrofit designs. |
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code - ensures system reliability after field deployment. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents spurious writes during power transients. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, software-driven program/erase status without external timers or interrupts - reduces firmware complexity. |
| Sector Architecture | Independent erase of boot block, parameter blocks, and main memory sections enables selective firmware updates - avoids full reflash downtime in mission-critical systems. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Code |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in programmable logic controllers requiring field-upgradable nonvolatile memory. IC Role / Device Role / Timing Role: Nonvolatile code storage device interfaced to 8-bit microcontroller bus; operates at 70 ns read speed synchronized with 8 MHz CPU clock. Use Value: Enables secure, in-system firmware updates without removing the controller from the production line - reducing maintenance downtime by >90% versus EPROM-based solutions. | Use Scenario: Holding bootloader code and hardware initialization routines in medical diagnostic equipment with strict regulatory traceability requirements. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector (00000H); accessed during cold start before RAM initialization. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates - meeting IEC 62304 Class C software safety requirements. |
| Telecom Line Card Parameter Storage | Automotive Body Control Module Calibration Data |
Use Scenario: Storing channel gain settings, filter coefficients, and fault logs in DSLAM line cards subject to frequent remote configuration changes. IC Role / Device Role / Timing Role: Parameter memory accessed via microcontroller's memory-mapped I/O; erased/reprogrammed in 8K-byte parameter blocks. Use Value: Sector erase capability allows updating calibration data without disturbing operational firmware - maintaining service uptime during carrier provisioning. | Use Scenario: Retaining vehicle-specific calibration values (e.g., window lift profiles, mirror position offsets) across battery disconnect events in automotive BCMs. IC Role / Device Role / Timing Role: Nonvolatile data storage device operating in 0°C–70°C ambient; powered from 5V rail derived from vehicle battery. Use Value: 100 µA standby current minimizes parasitic drain - extending battery life beyond ISO 16750-2 quiescent current limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-70EC | 3V/5V tolerant; 70 ns read; 12V RESET not supported; no boot block lockout override | Lacks 12V boot override; requires separate 3.3V supply option for mixed-voltage systems | Preferred where dual-voltage flexibility is needed but 12V override is unnecessary |
| SST39VF020-70-4C-NHE | 3.3V only; 70 ns read; 10 µs byte program; no RESET pin; top-boot architecture (00000H–03FFFH) | No hardware reset pin; incompatible with 5V-only systems; lacks 12V override capability | Valid for new 3.3V designs where board space and power efficiency outweigh legacy compatibility needs |
Compared with AM29LV002BT-70EC and SST39VF020-70-4C-NHE, the AT49F002-70PC uniquely supports 5V-only operation with 12V RESET override for boot block reprogramming - making it the only choice for legacy 5V systems requiring guaranteed bootloader recoverability after lockout activation.
Availability
AT49F002-70PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot code, telecom line card parameter storage, and automotive body control module calibration data requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002-70PC 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 devices for industrial, automotive, and consumer applications.
The AT49F002 series was designed as a drop-in 5V Flash replacement for 27C020 EPROMs, targeting cost-sensitive, high-reliability embedded systems needing in-system reprogrammability without external high-voltage circuitry.
FAQ
What is the maximum operating temperature range for the AT49F002-70PC?
The AT49F002-70PC is rated for commercial temperature operation from 0°C to +70°C. This is confirmed by the "-70PC" suffix in the ordering code and the DC/AC Operating Range table specifying "Com. (0° to 70°C)" for all -70x variants. The device is not qualified for industrial (-40°C to +85°C) operation unless ordered with an "I" suffix (e.g., AT49F002-70PI).
Does the AT49F002-70PC support hardware reset functionality?
Yes, the AT49F002-70PC includes a dedicated RESET pin that places outputs in high-impedance state and halts ongoing operations when driven low. Critically, applying 12V ±0.5V to this pin overrides the boot block lockout feature - a unique capability documented in the Boot Block Programming Lockout Override section of the datasheet.
How is the boot block protected on the AT49F002-70PC?
The AT49F002-70PC implements a 16K-byte boot block (00000H–03FFFH) with programmable lockout. Once enabled via a six-command sequence, the boot block becomes permanently write-protected at 5V levels. Protection is verified by reading address 00002H in software product identification mode - a high I/O0 indicates lockout is active.
What package type does the AT49F002-70PC use?
The AT49F002-70PC uses a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated as "32P6" in Atmel's ordering information. Its pinout matches standard 27C020 EPROMs, enabling direct socket replacement in legacy designs without PCB modification.
Can the AT49F002-70PC be programmed using standard EPROM programmers?
No, the AT49F002-70PC requires command-based programming via its CE/OE/WE interface and cannot be programmed by conventional EPROM programmers. It relies on six-byte software command sequences (e.g., 5555H/AAH, 2AAAH/55H, etc.) executed over the host microcontroller bus - a fundamental architectural difference from one-time-programmable EPROMs.
AT49F002-70PC 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:
- 70 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
AT49F002-70PC FAQ
1.How can I place an order for AT49F002-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-70PC 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 AT49F002-70PC reliable?
The price and inventory of AT49F002-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-70PC is usually 5 days.
3.What payment methods are accepted for AT49F002-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-70PC?
AT49F002-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-70PC 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 AT49F002-70PC?
For technical support, including AT49F002-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-70PC requirements.
6.How does Aetrix verify that AT49F002-70PC is sourced from the original manufacturer or authorized distributors?
All AT49F002-70PC 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 AT49F002-70PC meets industry standards.
7.What is the process for return or replacement of AT49F002-70PC?
All AT49F002-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-70PC, 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 AT49F002-70PC part is unused and in its original packaging.
Return procedure for AT49F002-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002-70PC 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…
