AT28C256F-15TU-T Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip AT28C256F-15TU-T is a 256K-bit (32K × 8) parallel EEPROM with 5 V supply, 150 ns maximum access time, and 28-pin TSOP-I package on tape and reel. Ideal for non-volatile data and code storage in embedded systems with worldwide availability.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- OBSOLETE
- Datasheet
- AT28C256F-15TU-T Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of AT28C256F-15TU-T?
- 256K-bit (32,768 × 8-bit) parallel EEPROM organization for byte-wide random access code and data storage
- 150 ns maximum read access time enables direct interface with classic 5 V microprocessors and CPLDs without wait states
- 5 V single-supply operation simplifies power design in legacy and industrial embedded systems
- 28-pin TSOP-I (thin small outline package) reduces PCB footprint compared to DIP-28 alternatives
- Tape-and-reel (T/R) packaging supports automated SMT assembly for high-volume production runs
What is AT28C256F-15TU-T used for?
AT28C256F-15TU-T is used in embedded systems for non-volatile storage of firmware, calibration tables, and configuration data that must be retained without power. Its 150 ns parallel interface suits direct memory-mapped access from 8-bit and 16-bit microcontrollers and FPGAs operating at 5 V. Industrial control systems, legacy retrofit boards, and test equipment commonly use this device as a drop-in non-volatile memory for boot-code or parameter storage.
What are the specifications of AT28C256F-15TU-T?
| Manufacturer Package Code | TSOP-28 |
| YTEOL | 0 |
| Access Time-Max | 150ns |
| JESD-30 Code | R-PDSO-G28 |
| Memory Density | 262144bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Words | 32768words |
| Number of Words Code | 32000 |
| Operating Mode | ASYNCHRONOUS |
| Organization | 32KX8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE |
| Parallel/Serial | PARALLEL |
| Programming Voltage | 5V |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.55mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 3ms |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
Where can I find the AT28C256F-15TU-T datasheet?
AT28C256F-15TU-T Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for AT28C256F-15TU-T?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the memory density and organization of the AT28C256F-15TU-T?
The AT28C256F-15TU-T provides 256K bits of EEPROM organized as 32,768 words × 8 bits, offering 32 KB of byte-addressable non-volatile storage. This organization enables direct byte-wide parallel access by 8-bit microcontrollers and processors without requiring address multiplexing.
How fast can the AT28C256F-15TU-T deliver data to a processor?
The AT28C256F-15TU-T achieves a maximum read access time of 150 ns, allowing it to interface directly with 5 V microprocessors and microcontrollers running at up to approximately 6 MHz without requiring additional wait state cycles, depending on bus setup and hold timing.
What package does AT28C256F-15TU-T use and how does it compare to through-hole alternatives?
AT28C256F-15TU-T uses a 28-pin TSOP-I surface-mount package, which is significantly smaller than the through-hole DIP-28 package used in earlier EEPROM generations. The TSOP footprint reduces PCB area, and the T/R (tape-and-reel) suffix enables automated pick-and-place assembly rather than manual insertion.
What supply voltage does AT28C256F-15TU-T require and what systems is it compatible with?
AT28C256F-15TU-T operates from a single 5 V supply, making it directly compatible with legacy 5 V microprocessor buses, industrial PLCs, and CPLD-based systems without level shifting. This simplifies integration into 5 V TTL-compatible data and address bus designs common in industrial and instrumentation platforms.
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