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Microchip Technology AT28C17-15PI
- Part No.:
- AT28C17-15PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28C17-15PI.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
AT28C17-15PI from Atmel is a 16K (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 150 ns read access time, and industrial temperature range (–40°C to +85°C). It supports self-timed byte write cycles, DATA POLLING, and READY/BUSY signaling for microprocessor-controlled embedded systems requiring nonvolatile storage with direct SRAM-like interface.
For engineers reviewing the AT28C17-15PI datasheet, AT28C17-15PI pinout, AT28C17-15PI application, or AT28C17-15PI equivalent, key selection considerations include its 1 ms standard write time, CMOS/TTL compatibility, 100 µA standby current, and dual write-detection methods-critical for real-time firmware update and configuration retention in industrial controllers.
Technical Context
The AT28C17-15PI operates as a parallel-access nonvolatile memory with static RAM-compatible read/write timing. Its internal control timer manages self-timed byte writes, including automatic clear-before-write and latching of address/data on WE/CE edges-eliminating external timing circuitry.
It implements two hardware-level write completion detection mechanisms: open-drain RDY/BUSY output (pin 1) and DATA POLLING via I/O7 complement behavior during programming. Write protection is enforced by VCC sense (<3.8 V inhibition), 5 ms power-on delay, and triple-input logic (CE/OE/WE state validation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits): sufficient for boot code, calibration tables, or device configuration in space-constrained microcontroller systems. |
| Read Access Time | 150 ns max: enables direct interfacing with 5–8 MHz microprocessors without wait states. |
| Byte Write Time | 1 ms typical (standard version): defines minimum interval between successive byte writes in firmware update routines. |
| VCC Supply | 5 V ± 10%: compatible with legacy 5 V logic rails and eliminates need for dedicated voltage regulators. |
| Standby Current | 100 µA max (CMOS): supports low-power operation in battery-backed or energy-sensitive applications. |
| Endurance | 10⁴ write/erase cycles: validated for infrequent configuration updates over 10-year product lifetime. |
| Data Retention | 10 years at 85°C: ensures long-term reliability in industrial environments without refresh. |
Pinout & Package
AT28C17-15PI is packaged in a 28-lead, 0.600" wide plastic DIP (PDIP, package code P6), JEDEC MS-011 AB compliant, with through-hole mounting and 0.1" lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus supporting full 2K-word addressing; TTL/CMOS compatible input thresholds. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; outputs drive 2.1 mA low / –400 µA high; supports DATA POLLING on I/O7. |
| CE | Chip Enable | Active-low chip select; when high, forces standby mode and high-impedance I/Os regardless of OE/WE state. |
| OE | Output Enable | Active-low read control; used with CE to prevent bus contention; required high during write operations. |
| WE | Write Enable | Active-low write strobe; initiates self-timed byte write; latches address/data on falling/rising edges respectively. |
| RDY/BUSY | Open-Drain Status Output | Actively pulled low during write cycle; released at completion; supports wired-OR connection across multiple devices. |
| GND / VCC | Power Terminals | Ground reference and 5 V supply; decoupling capacitor recommended near VCC pin for noise immunity. |
| NC | No Connect | Pins 2, 17, and 26 are unconnected; must remain floating per datasheet-no routing or termination. |
Key Features
| Feature | Design Value |
|---|---|
| Self-Timed Byte Write | Eliminates external timing components by integrating address/data latches and internal control timer-reducing BOM count and PCB area. |
| DATA POLLING Support | Enables software-driven write completion detection via I/O7 complement behavior-no additional hardware interrupt lines required. |
| READY/BUSY Open-Drain Output | Allows multi-device status monitoring on shared bus using single pull-up resistor-simplifies system-level write coordination. |
| VCC Sense Write Inhibit | Prevents corruption during power ramp-up or brown-out by disabling writes below ~3.8 V-ensuring data integrity without external supervisor IC. |
| Chip Clear Function | Full memory erase via 12 V on OE and 10 ms WE pulse-enables factory reset or secure provisioning without programmer hardware. |
Applications
| Industrial PLC Configuration Storage | Embedded System Bootloader Parameter Table |
|---|---|
|
Use Scenario: Storing I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers operating continuously in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during startup and runtime; reads occur at 5–10 Hz, writes only during commissioning or field updates. Use Value: 10-year data retention at 85°C and 10⁴ endurance ensure reliable operation over full equipment lifecycle without maintenance. |
Use Scenario: Holding bootloader parameters (e.g., firmware checksum, boot source selection, watchdog timeout) in medical or test equipment where firmware integrity is critical. IC Role / Device Role / Timing Role: Static configuration store read once per power cycle; write occurs only during firmware upgrade via serial interface. Use Value: 150 ns read access allows immediate parameter fetch without CPU stall; VCC-sense write inhibit prevents accidental corruption during power transitions. |
| Automotive ECU Calibration Memory | Point-of-Sale Terminal Settings Backup |
|
Use Scenario: Retaining engine calibration maps and sensor offset corrections in automotive ECUs subjected to thermal cycling and vibration. IC Role / Device Role / Timing Role: Read-only during normal operation; write triggered only during dealer reprogramming sessions using diagnostic tools. Use Value: Industrial temperature rating (–40°C to +85°C) and 100 µA standby current meet automotive cold-cranking and sleep-mode requirements. |
Use Scenario: Preserving tax rates, receipt formatting rules, and user preferences in retail terminals that may lose main power unexpectedly. IC Role / Device Role / Timing Role: Frequent reads during transaction processing; writes occur after each setting change with immediate DATA POLLING confirmation. Use Value: Dual write-detection (RDY/BUSY + DATA POLLING) guarantees atomic save operations even during intermittent AC power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PI | 32K × 8 capacity, same 150 ns access, identical PDIP-28 package and pinout. | Supports larger configuration sets; requires no layout change but increases cost and power slightly. | Select when future firmware expansion or multi-region calibration data require >16 KB nonvolatile storage. |
| ST M28W160ECB90ZC1 | 16 Mbit (2M × 8), 90 ns access, 3.3 V supply, SOIC-44 package-no pin compatibility. | Higher speed and density but incompatible voltage and footprint; requires redesign. | Consider only for new designs targeting lower voltage, higher performance, and surface-mount assembly. |
Compared with AT28C256-15PI, the AT28C17-15PI offers lower cost and reduced power for smaller configuration needs; versus ST M28W160ECB90ZC1, it provides drop-in 5 V compatibility and proven industrial reliability without board revision.
Availability
AT28C17-15PI is available at Aetrix Electronics and suitable for industrial automation, embedded firmware storage, and automotive electronics requiring stable component supply across extended lifecycles.
Supply support for AT28C17-15PI 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 AT28C17 product line delivers parallel EEPROMs optimized for direct microprocessor interfacing in industrial, automotive, and telecom applications where SRAM-like simplicity and long-term data retention are essential.
FAQ
What is the maximum write cycle time for AT28C17-15PI?
The AT28C17-15PI has a maximum write cycle time of 1.0 ms under standard conditions. This value is specified in the AC Write Characteristics table and applies to the non-E variant (no "E" suffix). The timing is internally controlled and does not require external clocking or wait-state generation by the host processor.
Does AT28C17-15PI support both DATA POLLING and RDY/BUSY detection?
Yes, AT28C17-15PI supports both methods. During a write cycle, reading the addressed location returns the complement of the written data on I/O7 (DATA POLLING), while pin 1 (RDY/BUSY) is actively pulled low and released upon completion. These mechanisms provide flexible, hardware- or software-based write completion detection.
What is the operating temperature range for AT28C17-15PI?
The AT28C17-15PI is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the DC and AC Operating Range section of the datasheet and distinguishes it from commercial-grade variants (0°C to 70°C) such as AT28C17-15PC.
Can AT28C17-15PI be used as a direct replacement for standard SRAM in existing designs?
No-while AT28C17-15PI uses SRAM-like read/write timing and control signals, it is nonvolatile and requires specific write protocols (e.g., WE pulse sequencing, VCC stability checks). Direct substitution without firmware adaptation will result in failed writes or data corruption.
Is the AT28C17-15PI pinout compatible with other 28-pin parallel EEPROMs?
Yes, AT28C17-15PI follows the JEDEC-approved byte-wide pinout for 28-pin DIP packages, matching industry-standard layouts for 2K × 8 EEPROMs. Pin functions (A0–A10, I/O0–I/O7, CE, OE, WE, RDY/BUSY, GND, VCC) align with equivalents like the Xicor X28C17 and Intel 28C17, enabling layout reuse where timing and voltage match.
AT28C17-15PI 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:
- 1ms
- Access Time:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
AT28C17-15PI FAQ
1.How can I place an order for AT28C17-15PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28C17-15PI 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 AT28C17-15PI reliable?
The price and inventory of AT28C17-15PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28C17-15PI is usually 5 days.
3.What payment methods are accepted for AT28C17-15PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28C17-15PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28C17-15PI?
AT28C17-15PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28C17-15PI 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 AT28C17-15PI?
For technical support, including AT28C17-15PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28C17-15PI requirements.
6.How does Aetrix verify that AT28C17-15PI is sourced from the original manufacturer or authorized distributors?
All AT28C17-15PI 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 AT28C17-15PI meets industry standards.
7.What is the process for return or replacement of AT28C17-15PI?
All AT28C17-15PI units undergo pre-shipment inspection (PSI). If there is an issue with AT28C17-15PI, 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 AT28C17-15PI part is unused and in its original packaging.
Return procedure for AT28C17-15PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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