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Microchip Technology AT29C020-15PC
- Part No.:
- AT29C020-15PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT29C020-15PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,755
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Product details
Overview
AT29C020-15PC from Atmel is a 2-megabit (256K × 8) 5-volt-only Flash memory IC organized as 262,144 bytes, featuring 70 ns read access time, 10 ms sector program cycle time, 10,000 write/erase endurance, and dual 8K-byte boot blocks with independent programming lockout - used for firmware storage and boot code retention in embedded controllers and industrial microcontroller systems.
For engineers reviewing the AT29C020-15PC datasheet, AT29C020-15PC pinout, AT29C020-15PC application, or AT29C020-15PC equivalent, key selection considerations include sector-based reprogramming without high-voltage support, DATA polling and TOGGLE BIT for program completion detection, hardware/software data protection, and compatibility with standard EPROM read interfaces in legacy 8-bit microcontroller designs.
Technical Context
The AT29C020-15PC implements sector-erase-and-program architecture with 1024 × 256-byte sectors, internal address/data latches for full-sector buffering, and autonomous internal timer-controlled erase-and-write sequencing. It supports byte-load programming via WE- or CE-triggered pulses with strict 150 µs inter-byte timing.
Its dual boot block lockout uses seven-command software enable sequence to permanently disable programming in either the lowest or highest 8K-byte region, while hardware protection includes VCC sense (<3.8 V inhibit), 5 ms power-on delay, and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), directly replaceable for 256K-byte EPROMs in legacy 8-bit systems |
| Read Access Time | 150 ns max - defines minimum bus cycle duration for reliable read operations at 5 MHz |
| Sector Program Time | 10 ms typical - determines firmware update latency per 256-byte sector |
| Endurance | >10,000 program/erase cycles per sector - supports field firmware upgrades over product lifetime |
| Supply Voltage | 5 V ±10% - eliminates need for charge pumps or auxiliary voltage rails |
| Standby Current | 100 µA (CMOS) - enables low-power hold states in battery-backed systems |
| Operating Temp | 0°C to 70°C - validated for commercial-grade industrial control panels and instrumentation |
| Interface Compatibility | CMOS/TTL input/output levels - ensures direct connection to 8051, Z80, and 68K family microcontrollers |
Pinout & Package
AT29C020-15PC is supplied in a 32-pin plastic dual-inline package (PDIP), 0.600" wide (32P6), with through-hole mounting and industry-standard pin spacing. Pin 1 is marked by a notch or dot at the top-left corner of the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 262,144-byte addressing; A0–A7 select byte within sector during programming |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; high-impedance when disabled |
| CE | Chip Enable | Active-low chip select; must be low for read or program; high disables outputs and enters standby |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low signal initiating byte load or sector program; controls latching edge for address/data |
| NC | No Connect | Pin 1 (DIP top view) is unconnected - must remain floating or grounded per layout guidelines |
| VCC | Power Supply | +5 V ±10% supply; decoupling capacitor required within 1 cm of pin for stable operation |
| GND | Ground Reference | Signal and power ground reference; requires low-inductance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Reprogramming | Eliminates external high-voltage generators - simplifies PCB design and reduces BOM cost |
| Hardware Data Protection | VCC sense + 5 ms power-on delay + noise filtering prevents spurious writes during brown-out or EMI events |
| Software Data Protection | Three-command unlock sequence (AAh/55h/A0h) required before each sector program - prevents accidental firmware corruption |
| Boot Block Lockout | Independent 8K-byte lockout for lower/higher memory regions - secures bootloader and critical startup code |
| DATA Polling & TOGGLE BIT | I/O7 complement and I/O6 toggling provide real-time, bus-compatible program status without external timers or interrupts |
| CMOS Standby Current | 100 µA max - enables long-term retention in power-gated systems such as smart meters and remote sensors |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration data in programmable logic controllers requiring field-upgradable nonvolatile memory. IC Role / Device Role / Timing Role: Nonvolatile program storage device with sector-level reprogrammability and boot block lockout to protect core runtime engine. Use Value: Enables secure, in-system firmware updates without removing the module; 10,000-cycle endurance supports multi-year maintenance cycles. | Use Scenario: Providing boot code and BIOS for 8-bit microcontrollers (e.g., 8051, Z8) in medical diagnostic equipment and test instruments. IC Role / Device Role / Timing Role: EPROM-replacement Flash memory with identical read interface timing and 5V-only operation. Use Value: Eliminates UV-erasable EPROM handling while maintaining pinout and timing compatibility - no board redesign required. |
| Embedded Network Gateway Bootloader | Automotive Diagnostic Tool Code Storage |
Use Scenario: Holding bootloader firmware in Ethernet-to-CAN gateways where secure startup and field updates are mandatory. IC Role / Device Role / Timing Role: Secure boot memory with independently lockable 8K-byte regions - one for bootloader, one for recovery image. Use Value: Prevents unauthorized modification of boot code while allowing safe application firmware updates in the remaining memory space. | Use Scenario: Storing diagnostic protocol stacks and vehicle-specific calibration tables in handheld OBD-II tools. IC Role / Device Role / Timing Role: Field-upgradable firmware storage with hardware write-inhibit during power transitions. Use Value: Ensures firmware integrity during intermittent vehicle battery connections - VCC sense prevents writes below 3.8 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV020B-150EC | 3.3 V core with 5 V tolerant I/O; 150 ns access; 100,000 endurance cycles | Requires level-shifting for pure 5 V systems; higher endurance but slower access than AT29C020-15PC | Select when migrating to lower-power 3.3 V platforms with longer firmware lifecycle requirements |
| MX29LV020-15P | 3.3 V supply only; 150 ns access; software reset command; no hardware VCC sense | Not pin-compatible; lacks 5 V operation and hardware write protection - unsuitable for legacy 5 V designs | Choose only for new 3.3 V designs where AT29C020-15PC's 5 V compatibility is unnecessary |
Compared with AM29LV020B-150EC and MX29LV020-15P, the AT29C020-15PC uniquely delivers true 5 V-only operation with integrated VCC-sense hardware protection and EPROM-equivalent timing - making it the sole option for drop-in replacement in existing 5 V microcontroller systems requiring robust in-field reprogramming.
Availability
AT29C020-15PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot memory, embedded network gateway bootloader, and automotive diagnostic tool code storage requiring stable component supply across extended production lifecycles.
Supply support for AT29C020-15PC 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 mixed-signal ICs for embedded applications.
The AT29C020-15PC belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically to replace UV-erasable EPROMs in 5 V microcontroller systems while enabling in-system firmware updates without high-voltage programming.
FAQ
What is the maximum read access time specified for the AT29C020-15PC?
The AT29C020-15PC has a maximum read access time of 150 ns, as confirmed by its "-15" speed grade designation and AC Read Characteristics table. This value defines the guaranteed time from valid address and CE/OE assertion to stable data on I/O0–I/O7. The 150 ns specification applies across the commercial temperature range (0°C to 70°C) with VCC = 5 V ±10%, and is measured under standard test conditions with CL = 5 pF.
Does the AT29C020-15PC require high-voltage programming signals?
No, the AT29C020-15PC does not require high-voltage programming signals. It operates with single 5 V ±10% supply for both read and program functions. Programming is initiated using standard 5 V logic levels on WE and CE pins, with internal circuitry generating necessary voltages. This eliminates external charge pumps or programming adapters - a key differentiator from earlier EPROM and EEPROM technologies.
How many sectors does the AT29C020-15PC contain, and what is the size of each sector?
The AT29C020-15PC contains 1024 sectors, each 256 bytes in size. This sector organization is explicitly stated in the Features section and confirmed in the Device Operation section. Sector addressing uses A8–A17, while byte addressing within a sector uses A0–A7. Each sector must be erased and programmed as a unit - partial sector updates are not supported.
What package type is used for the AT29C020-15PC?
The AT29C020-15PC uses a 32-pin plastic dual-inline package (PDIP), designated as 32P6, with 0.600" body width. This is confirmed in the Ordering Information table, where "AT29C020-15PC" maps to package "32P6". The package features through-hole mounting, standard DIP pin spacing (2.54 mm), and pin 1 identification via notch or dot at the top-left corner.
Can the AT29C020-15PC be used as a direct replacement for standard EPROMs like the 27C256?
Yes, the AT29C020-15PC can serve as a functional replacement for 27C256 EPROMs in most 5 V systems due to identical pinout (32-pin DIP), same address/data bus structure (A0–A15/I/O0–I/O7), and compatible read timing (CE/OE-controlled). However, unlike EPROMs, the AT29C020-15PC supports in-system reprogramming and requires explicit sector erase before writing - so firmware update routines must be adapted accordingly.
AT29C020-15PC 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:
- 10ms
- Access Time:
- 150 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
AT29C020-15PC FAQ
1.How can I place an order for AT29C020-15PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29C020-15PC 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 AT29C020-15PC reliable?
The price and inventory of AT29C020-15PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29C020-15PC is usually 5 days.
3.What payment methods are accepted for AT29C020-15PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29C020-15PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29C020-15PC?
AT29C020-15PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29C020-15PC 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 AT29C020-15PC?
For technical support, including AT29C020-15PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29C020-15PC requirements.
6.How does Aetrix verify that AT29C020-15PC is sourced from the original manufacturer or authorized distributors?
All AT29C020-15PC 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 AT29C020-15PC meets industry standards.
7.What is the process for return or replacement of AT29C020-15PC?
All AT29C020-15PC units undergo pre-shipment inspection (PSI). If there is an issue with AT29C020-15PC, 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 AT29C020-15PC part is unused and in its original packaging.
Return procedure for AT29C020-15PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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