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Microchip Technology AT28C17E-15PC
- Part No.:
- AT28C17E-15PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28C17E-15PC.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,784
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Product details
Overview
AT28C17E-15PC from Atmel is a 16K-bit (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 150 ns read access time, 200 µs fast byte write, and CMOS/TTL-compatible I/O. It operates at 5V ±10%, supports commercial temperature range (0°C to 70°C), and is used in microcontroller-based firmware storage and configuration memory applications.
For engineers reviewing the AT28C17E-15PC datasheet, AT28C17E-15PC pinout, AT28C17E-15PC application, or AT28C17E-15PC equivalent, key selection considerations include self-timed write cycle timing, RDY/BUSY open-drain signaling, DATA POLLING capability, standby current ≤100 µA, and compatibility with standard 8-bit microprocessor buses.
Technical Context
The AT28C17E-15PC implements a self-timed byte write architecture with internal address/data latches and an automatic clear-before-write sequence. Its RDY/BUSY output and DATA POLLING (I/O7 complement detection) provide two independent methods for write completion detection without external timing components.
It functions as a drop-in replacement for static RAM in read cycles and supports direct microprocessor control via CE/OE/WE logic-no external write controllers or high-voltage programming supplies are required. The device uses Atmel's nonvolatile CMOS process with built-in error correction for enhanced endurance and data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits); sufficient for small boot code or calibration tables in embedded systems |
| Read Access Time | 150 ns max; enables direct interfacing with 5–6 MHz microprocessors without wait states |
| Byte Write Time | 200 µs max (AT28C17E variant); reduces full-device rewrite to ~0.4 seconds vs. 1 ms in standard version |
| Endurance | 100,000 write/erase cycles; supports frequent field-updatable configuration storage |
| Data Retention | 10 years at 25°C; ensures long-term reliability in unpowered storage scenarios |
| Supply Voltage | 5V ±10%; compatible with legacy 5V logic families and avoids need for dedicated voltage regulators |
| Standby Current | ≤100 µA (CMOS mode); suitable for battery-backed or low-power sleep-mode applications |
Pinout & Package
AT28C17E-15PC is packaged in a 28-lead, 0.600" wide plastic DIP (PDIP) per JEDEC MS-011 AB, with pin 1 designated by notch and dot marking. Pin 1 is RDY/BUSY (open-drain), pins 2–14 and 16–27 serve address/data/control functions, pin 15 is GND, and pin 28 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus for accessing all 2,048 memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; latched internally during write for bus release |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high disables outputs and enables standby |
| OE | Output Enable | Active-low read control; used with CE to prevent bus contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; initiates self-timed byte write when CE low and OE high |
| RDY/BUSY | Open-Drain Status Output | Pulled low during write; released high at completion; supports wired-OR of multiple devices |
| GND | Ground Reference | Signal and power ground (pin 15) |
| VCC | Power Supply | +5V ±10% supply (pin 28); powers core logic and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Self-Timed Byte Write | Eliminates need for external write timing circuitry; internal timer handles clear-and-program sequence automatically |
| DATA POLLING Support | Enables software-driven write completion detection via I/O7 complement behavior-no extra hardware required |
| RDY/BUSY Open-Drain Output | Allows multi-device status sharing on single line; simplifies system-level write coordination in multi-EEPROM designs |
| Write Protection Logic | Hardware-enforced inhibition below 3.8V VCC, plus 5 ms power-on delay and CE/OE/WE state validation prevents accidental writes |
| JEDEC Byte-Wide Pinout | Ensures mechanical and electrical compatibility with existing 27xx/28xx socket footprints and PCB layouts |
Applications
| Industrial PLC Configuration Storage | Legacy Microcontroller Bootloader Memory |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and calibration coefficients in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during startup and runtime reconfiguration; read during initialization, written only during parameter updates. Use Value: 100K endurance and 10-year data retention ensure reliable operation across extended maintenance intervals without backup power. |
Use Scenario: Holding bootloader firmware and secure boot keys in 8-bit microcontrollers (e.g., 8051, Z80) where external ROM is required. IC Role / Device Role / Timing Role: Parallel boot memory mapped into CPU address space; 150 ns access enables zero-wait-state execution from reset vector. Use Value: JEDEC pinout and TTL/CMOS compatibility allow direct substitution for EPROMs without redesigning address decoding or bus drivers. |
| Point-of-Sale Terminal Settings | Medical Device Calibration Data |
Use Scenario: Preserving tax rates, receipt formatting rules, and user preferences in retail terminals subject to frequent power cycling. IC Role / Device Role / Timing Role: Low-power configuration store; reads occur at power-up; writes occur only during admin menu updates. Use Value: ≤100 µA standby current extends battery life in backup-powered units; fast 200 µs writes minimize update latency during service events. |
Use Scenario: Archiving sensor calibration offsets and device serial history in Class II medical instruments requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure nonvolatile memory with write protection; accessed via isolated microcontroller subsystem during calibration routines. Use Value: VCC-sense and 5 ms power-on delay prevent corruption during brown-out conditions-critical for regulatory compliance and audit trails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PC | 32K × 8 organization, same 150 ns access, 200 µs write, identical PDIP package and pinout | Provides double memory capacity while maintaining full software/hardware compatibility | Select when future firmware growth or expanded configuration sets require >16K storage without layout change |
| ST M28C256-15P | Same 32K × 8 size, 150 ns access, but 1 ms write time and no RDY/BUSY pin; requires polling-only detection | Lacks hardware-ready signaling; may increase CPU overhead in time-critical write sequences | Acceptable where software polling is already implemented and write frequency is low |
Compared with AT28C256-15PC, the AT28C17E-15PC offers lower cost and smaller footprint for fixed 16K needs; versus ST M28C256-15P, it delivers faster write timing and hardware status signaling-critical for deterministic real-time systems.
Availability
AT28C17E-15PC is available at Aetrix Electronics and suitable for industrial PLC configuration storage, legacy microcontroller bootloader memory, and point-of-sale terminal settings requiring stable component supply across extended product lifecycles.
Supply support for AT28C17E-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, nonvolatile memory, and secure authentication ICs.
The AT28C17E-15PC belongs to Atmel's parallel EEPROM product line, designed for direct microprocessor interfacing in legacy and cost-sensitive embedded systems requiring reliable, low-power, field-updatable nonvolatile storage.
FAQ
What is the maximum write cycle time for AT28C17E-15PC?
The AT28C17E-15PC has a maximum byte write cycle time of 200 µs, confirmed in the AC Write Characteristics table. This is the "E" variant's defining specification-distinct from the standard AT28C17-15PC, which requires up to 1 ms. The 200 µs timing applies under standard 5V operation and commercial temperature range, enabling rapid field updates without sacrificing endurance.
Does AT28C17E-15PC support hardware write completion detection?
Yes, AT28C17E-15PC provides hardware write completion detection via its open-drain RDY/BUSY pin (Pin 1). During a write cycle, this pin is actively pulled low and released high upon completion. This allows external logic or microcontrollers to synchronize operations without continuous polling, reducing CPU load and improving deterministic timing in real-time systems using AT28C17E-15PC.
How does AT28C17E-15PC prevent accidental writes during power transitions?
AT28C17E-15PC incorporates three hardware write protection mechanisms: (1) VCC sense that inhibits writes below ~3.8V, (2) a 5 ms internal power-on delay after VCC reaches threshold, and (3) mandatory active-low CE with active-high OE and active-low WE states. These features collectively prevent spurious writes during brown-out, power-up, or noise-induced signal glitches-ensuring data integrity in AT28C17E-15PC deployments.
Is AT28C17E-15PC pin-compatible with standard 27C256 EPROMs?
No, AT28C17E-15PC is not pin-compatible with 27C256 EPROMs. While both use 28-pin PDIP packages, AT28C17E-15PC has dedicated RDY/BUSY (Pin 1), NC (Pin 2), and different address/data pin assignments (e.g., A7–A0 on Pins 6–13 vs. 27C256's A0–A14 layout). It follows JEDEC byte-wide EEPROM pinout-not EPROM pinout-so direct socket replacement requires PCB revision for AT28C17E-15PC integration.
What is the endurance rating of AT28C17E-15PC and how is it achieved?
The AT28C17E-15PC is rated for 100,000 write/erase cycles, double the 10,000-cycle rating of the base AT28C17. This higher endurance is achieved through Atmel's enhanced nonvolatile CMOS process and internal error correction circuitry, which mitigates oxide degradation during repeated programming. The specification is validated across the full commercial temperature range and directly applies to AT28C17E-15PC-not inferred from family data.
AT28C17E-15PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 200µs
- 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:
- 28-PDIP
AT28C17E-15PC FAQ
1.How can I place an order for AT28C17E-15PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28C17E-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 AT28C17E-15PC reliable?
The price and inventory of AT28C17E-15PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28C17E-15PC is usually 5 days.
3.What payment methods are accepted for AT28C17E-15PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28C17E-15PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28C17E-15PC?
AT28C17E-15PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28C17E-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 AT28C17E-15PC?
For technical support, including AT28C17E-15PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28C17E-15PC requirements.
6.How does Aetrix verify that AT28C17E-15PC is sourced from the original manufacturer or authorized distributors?
All AT28C17E-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 AT28C17E-15PC meets industry standards.
7.What is the process for return or replacement of AT28C17E-15PC?
All AT28C17E-15PC units undergo pre-shipment inspection (PSI). If there is an issue with AT28C17E-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 AT28C17E-15PC part is unused and in its original packaging.
Return procedure for AT28C17E-15PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT28C17E-15PC Tags
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