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Microchip Technology AT28C16E-15JI
- Part No.:
- AT28C16E-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT28C16E-15JI.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
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Product details
Overview
AT28C16E-15JI from Atmel is a 16 Kbit (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 150 ns read access time, 200 µs fast byte write, and industrial temperature range (–40°C to +85°C). It operates on 5V ±10%, supports DATA POLLING for write completion detection, and delivers 100 µA CMOS standby current - ideal for firmware storage in embedded controllers requiring nonvolatile reprogrammability.
For engineers reviewing the AT28C16E-15JI datasheet, AT28C16E-15JI pinout, AT28C16E-15JI application, or AT28C16E-15JI equivalent, key selection criteria include verified 100K-cycle endurance, self-timed write with internal control timer, VCC sense write protection, and compatibility with microprocessor bus timing without external logic.
Technical Context
The AT28C16E-15JI implements a parallel-addressable EEPROM architecture with internal address/data latches and an autonomous write controller that performs automatic clear-before-write. Its dual-line chip enable (CE) and output enable (OE) control enables flexible bus arbitration and prevents contention during mixed read/write operations.
It uses Atmel's nonvolatile CMOS process with built-in error correction for extended data retention (10 years) and includes 32 bytes of dedicated identification memory accessible via A9 = 12 V. The device supports CHIP CLEAR at 12 V on OE and write inhibit via VCC sensing below 3.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits) - directly replaces SRAM-sized boot ROMs in 8-bit microcontroller systems |
| Read Access Time | 150 ns - meets timing requirements for 5 MHz Z80/8051 bus cycles without wait states |
| Byte Write Time | 200 µs max - enables full device rewrite in ≤0.4 s, critical for field firmware updates |
| Endurance | 100,000 write/erase cycles - validated for high-frequency configuration storage in industrial PLCs |
| Supply Voltage | 5V ±10% - compatible with legacy TTL/CMOS logic rails and eliminates need for voltage regulators |
| Standby Current | 100 µA (CMOS) - enables low-power operation in battery-backed monitoring nodes |
| Operating Temperature | –40°C to +85°C - qualified for under-hood automotive ECUs and factory-floor automation hardware |
Pinout & Package
AT28C16E-15JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-018 AA compliant, with lead finish matte tin and RoHS-compliant packaging. Pin 1 is marked by corner notch; pins 1 and 17 are designated DC (Don't Connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit parallel address bus for 2K-word addressing; TTL/CMOS compatible thresholds |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit data path supporting true read/write without direction control lines |
| CE | Chip Enable | Active-low global select; when high, places outputs in high-Z and disables internal logic |
| OE | Output Enable | Active-low read gate; allows CE-controlled deselection while maintaining output state |
| WE | Write Enable | Active-low write strobe; initiates self-timed byte write with internal latching and timer |
| VCC | Power Supply | +5V ±10% supply; powers core logic and charge pump for EEPROM programming |
| GND | Ground Reference | Signal and power return; decoupling required within 10 mm of VCC pin |
| NC / DC | No Connect / Don't Connect | Pins 1 and 17 - must remain unconnected per datasheet; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Self-Timed Byte Write | Eliminates external timing circuitry; internal control timer ensures reliable write completion independent of host clock |
| DATA POLLING on I/O7 | Enables real-time write status monitoring without busy-wait loops or interrupts - reduces CPU overhead by >90% vs polling via status register |
| VCC Sense Write Inhibit | Prevents corruption during brown-out by disabling writes below 3.8 V - critical for robustness in unregulated 5V supplies |
| 12 V Chip Erase | Full-memory erase in 10 ms using OE=12 V - enables rapid factory reset or secure data wipe without cycling power |
| User-Accessible ID Memory | 32-byte reserved area (7E0H–7FFH) for serialization, calibration data, or firmware version tracking - accessed with A9=12 V |
Applications
| Industrial PLC Configuration Storage | Automotive ECU Boot Code Retention |
|---|---|
Use Scenario: Storing runtime-configurable I/O mapping and alarm thresholds in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8051-based control MCU via parallel bus; accessed during power-up and runtime parameter changes. Use Value: 100K-cycle endurance supports daily reconfiguration over 10+ years; 10-year data retention ensures settings survive extended shelf life and maintenance downtime. | Use Scenario: Holding bootloader code and calibration constants in engine control units operating under under-hood thermal stress. IC Role / Device Role / Timing Role: Primary boot ROM replacement; provides deterministic 150 ns read timing for cold-start execution and supports field updates via CAN diagnostics. Use Value: Industrial temperature rating (–40°C to +85°C) and VCC-sense write protection prevent corruption during ignition transients and thermal cycling. |
| Medical Device Calibration Data | Point-of-Sale Terminal Firmware Backup |
Use Scenario: Archiving sensor calibration coefficients and usage logs in portable diagnostic equipment requiring FDA-compliant traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element; ID memory (7E0H–7FFH) stores serial number and calibration timestamp with 12 V write lock. Use Value: Built-in error correction ensures bit integrity over 10-year device lifetime; 100 µA standby current extends battery backup duration beyond 5 years. | Use Scenario: Maintaining fallback firmware images and transaction journaling in retail terminals subject to frequent power loss. IC Role / Device Role / Timing Role: Dual-role memory: active firmware store during operation and recovery image repository after failed OTA update. Use Value: Fast 200 µs byte writes allow atomic journal updates without interrupting transaction processing; DATA POLLING enables zero-latency status feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15JI | 32K × 8 organization, same 150 ns access, 200 µs write, identical PLCC-32 package and pinout | Higher density for larger boot images; requires no PCB change but needs updated address decoding logic | Select when firmware size exceeds 16 KB and board layout supports extended address lines (A11–A14) |
| ST M28W160ECB90ZB6E | 16 Mbit (2M × 8), 90 ns access, 5V-only, SOIC-44 package; lacks DATA POLLING and VCC sense | Higher speed and density but requires external write timing control and lacks brown-out protection | Choose only if system already implements external write sequencing and operates in stable 5V environments |
Compared with AT28C256-15JI and ST M28W160ECB90ZB6E, the AT28C16E-15JI offers optimal balance of proven reliability, minimal integration effort, and industrial-grade robustness - especially where self-timed writes, low-power standby, and brown-out immunity are mandatory.
Availability
AT28C16E-15JI is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical calibration modules, and point-of-sale terminal designs requiring stable component supply across long product lifecycles.
Supply support for AT28C16E-15JI 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and security ICs for embedded systems.
The AT28C16E series was designed specifically for drop-in replacement of EPROM and SRAM in legacy 8-bit microprocessor systems - emphasizing ease of integration, industrial reliability, and zero-external-component write timing.
FAQ
What is the maximum write cycle time for AT28C16E-15JI?
The AT28C16E-15JI guarantees a maximum byte write cycle time of 200 µs, significantly faster than the standard AT28C16's 1 ms. This specification is validated across the full industrial temperature range (–40°C to +85°C) and applies to all 2,048 memory locations. The internal control timer ensures consistent timing regardless of VCC variation within 5V ±10%.
Does AT28C16E-15JI support chip-wide erase?
Yes, AT28C16E-15JI supports CHIP CLEAR via a 10 ms low pulse on WE while CE is low and OE is raised to 12.0 V ±0.5 V. This operation sets all memory bits to logic high (FFH) and is electrically verified per datasheet. The 12 V level must be applied only to OE - no other pin accepts voltages above VCC + 0.6 V.
How does DATA POLLING work on AT28C16E-15JI?
During a write cycle, reading the addressed location returns the complement of the latched data on I/O7 (other outputs are indeterminate); once the write completes, true data appears on all I/O lines. This allows the host MCU to poll I/O7 without halting other operations - a single bit check replaces complex status registers or timer-based delays in AT28C16E-15JI firmware.
Is AT28C16E-15JI pin-compatible with AT28C16-15JI?
Yes, AT28C16E-15JI is fully pin-compatible with AT28C16-15JI in the same PLCC-32 package. Both share identical pin functions, timing parameters (150 ns read), and DC characteristics. The "E" suffix denotes enhanced endurance (100K vs 10K cycles) and faster write (200 µs vs 1 ms), with no changes to footprint, signal routing, or interface logic.
What package type is used for AT28C16E-15JI?
AT28C16E-15JI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-018 AA compliant, with body dimensions 1.27" × 1.27". Pins 1 and 17 are designated DC (Don't Connect) and must remain unconnected. The package supports reflow soldering per IPC/JEDEC J-STD-020D moisture sensitivity level 3.
AT28C16E-15JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT28C16E-15JI FAQ
1.How can I place an order for AT28C16E-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28C16E-15JI 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 AT28C16E-15JI reliable?
The price and inventory of AT28C16E-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28C16E-15JI is usually 5 days.
3.What payment methods are accepted for AT28C16E-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28C16E-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28C16E-15JI?
AT28C16E-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28C16E-15JI 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 AT28C16E-15JI?
For technical support, including AT28C16E-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28C16E-15JI requirements.
6.How does Aetrix verify that AT28C16E-15JI is sourced from the original manufacturer or authorized distributors?
All AT28C16E-15JI 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 AT28C16E-15JI meets industry standards.
7.What is the process for return or replacement of AT28C16E-15JI?
All AT28C16E-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT28C16E-15JI, 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 AT28C16E-15JI part is unused and in its original packaging.
Return procedure for AT28C16E-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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