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Microchip Technology AT28BV16-30JC
- Part No.:
- AT28BV16-30JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT28BV16-30JC.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,023
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Product details
Overview
AT28BV16-30JC from Atmel is a 16K (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 2.7–3.6V supply operation, 300 ns read access time, and 3 ms byte write cycle. It supports direct microprocessor control via DATA polling and RDY/BUSY output (TSOP variant), and is rated for industrial temperature range (–40°C to +85°C) in 32-lead PLCC package.
For engineers reviewing the AT28BV16-30JC datasheet, AT28BV16-30JC pinout, AT28BV16-30JC application, or AT28BV16-30JC equivalent, this device serves as a low-voltage, high-reliability nonvolatile memory replacement for SRAM-based boot code storage, configuration data retention, and firmware parameter logging in embedded controllers where write endurance (100,000 cycles) and 10-year data retention are critical.
Technical Context
The AT28BV16-30JC operates as a static RAM-compatible parallel EEPROM: reads and writes use standard CE/OE/WE control without external timing logic. Its internal self-timed write cycle clears and programs each byte autonomously after address/data latching, with completion signaled via DATA polling on I/O7 or RDY/BUSY open-drain output.
Write protection is implemented through VCC sensing (<2.0V inhibits writes), 5 ms power-on delay, and hardware-level inhibit via CE/OE/WE states. An additional 32-byte user-accessible ID area (7E0H–7FFH) is enabled by raising A9 to 12 V ±0.5 V, supporting device tracking or calibration data storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits): sufficient for small boot loaders, calibration tables, or configuration registers in resource-constrained systems. |
| Read Access Time | 300 ns max: enables direct interface with 3–4 MHz microcontrollers without wait states. |
| Byte Write Cycle | 3.0 ms typical: deterministic internal timing eliminates need for external write-strobe management. |
| Supply Voltage | 2.7–3.6 V: compatible with 3.3 V logic families and battery-backed systems operating down to 2.7 V. |
| Endurance | 100,000 write/erase cycles: supports frequent field-updatable parameters in industrial controllers. |
| Data Retention | 10 years at +85°C: ensures long-term reliability in unattended or sealed deployments. |
| Standby Current | 50 µA max: minimizes quiescent power in always-on monitoring or sensor nodes. |
Pinout & Package
AT28BV16-30JC is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), compliant with JEDEC MS-016 AE. Pin 1 is marked by corner notch; leads are arranged in a square J-bend configuration with 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus for selecting one of 2,048 memory locations; TTL/CMOS compatible. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read/write data transfer; high-impedance when deselected. |
| CE | Chip Enable | Active-low chip select; must be low for any access; enables bus contention control with OE. |
| OE | Output Enable | Active-low output gate; used with CE to manage read timing and prevent bus conflicts. |
| WE | Write Enable | Active-low write strobe; initiates byte write when CE low and OE high; latches address/data edges. |
| RDY/BUSY | Status Output | Open-drain signal pulled low during internal write; released upon completion (TSOP only - not present on PLCC). |
| VCC, GND | Power Supply | Single 2.7–3.6 V supply; decoupling required within 1 cm of pins per datasheet layout guidance. |
| NC, DC | No Connect / Don't Connect | Unbonded or unused pins; must remain floating (not tied to VCC/GND) to avoid latch-up or leakage. |
Key Features
| Feature | Design Value |
|---|---|
| DATA Polling Support | Enables real-time write completion detection via I/O7 complement read, eliminating fixed-delay polling loops and reducing CPU overhead. |
| Hardware Write Protection | VCC sense + 5 ms power-on delay + CE/OE/WE state lock prevents accidental writes during brown-out or reset sequences. |
| User-Accessible ID Area | 32 bytes at 7E0H–7FFH accessible via 12 V A9 bias, enabling unique device serialization or factory calibration storage. |
| JEDEC Byte-Wide Pinout | Ensures drop-in compatibility with legacy 27C256, 28C256, and other 2K×8 parallel EPROM/EEPROM sockets. |
| Industrial Temperature Range | Rated for –40°C to +85°C operation, validated across full voltage and timing specs for harsh-environment deployment. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed at power-up and during runtime reconfiguration; retains settings across 10+ year service life. Use Value: Eliminates battery-backed SRAM maintenance while guaranteeing 100,000 update cycles for field-adjustable parameters under temperature cycling. | Use Scenario: Holding sensor offset/gain coefficients and regulatory compliance logs in portable diagnostic equipment requiring traceable calibration history. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter storage with write-protection and 12 V–enabled ID area for audit trail linkage. Use Value: Supports FDA 21 CFR Part 11 compliance via immutable calibration records and device-specific serialization without external security ICs. |
| Automotive Body Control Module | Telecom Line Card Boot Code |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and fault codes in automotive BCMs operating across extended temperature ranges. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 8-bit MCU; withstands cold-cranking (2.7 V) and engine bay heat (+85°C). Use Value: Delivers guaranteed 10-year data retention and 100,000-cycle endurance despite repeated power cycling and thermal stress. | Use Scenario: Storing boot firmware checksums and FPGA configuration bitstreams in carrier-grade line cards where field upgrades occur infrequently but must be highly reliable. IC Role / Device Role / Timing Role: Parallel boot memory mapped into MCU address space; accessed during cold start before DRAM initialization. Use Value: 300 ns read access avoids boot delays; JEDEC pinout allows reuse of existing PCB footprints from obsolete EPROMs. |
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 (4K×8), 150 ns access, 5V-only supply (4.5–5.5 V) | Requires 5V system rail; higher density but incompatible voltage domain | Select only if 5V design exists and >16K capacity is needed; not suitable for 3.3V or mixed-voltage systems. |
| ST M28W640ECB90N6E | 64Mbit Flash, 90 ns access, 3.0–3.6V, sector erase architecture | Block-erase vs. byte-write; no DATA polling; requires command sequences | Choose for high-density firmware storage where byte-level updates are unnecessary and erase granularity is acceptable. |
Compared with AT28C256-15PC and ST M28W640ECB90N6E, the AT28BV16-30JC uniquely combines 3.3V operation, true byte-write capability, hardware write protection, and JEDEC pinout-making it optimal for retrofitting legacy 2K×8 sockets in low-power industrial and medical systems requiring field-updatable parameters.
Availability
AT28BV16-30JC is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, and automotive body control module parameter logging requiring stable component supply across extended temperature and voltage ranges.
Supply support for AT28BV16-30JC 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 for embedded systems.
The AT28BV16 product line delivers low-voltage, high-endurance parallel EEPROMs designed for direct replacement of EPROMs and battery-backed SRAM in industrial, medical, and automotive control applications where reliability and pin compatibility are essential.
FAQ
What is the maximum operating temperature range for the AT28BV16-30JC?
The AT28BV16-30JC is rated for industrial temperature operation from –40°C to +85°C. All AC and DC specifications-including 300 ns read access time, 3 ms byte write, and 50 µA standby current-are guaranteed across this full range. This makes the AT28BV16-30JC suitable for deployment in engine compartments, factory floors, and outdoor telecom enclosures where ambient temperatures exceed commercial limits.
Does the AT28BV16-30JC support hardware write protection?
Yes, the AT28BV16-30JC implements three-tier hardware write protection: (1) VCC sense circuitry disables writes below ~2.0 V, (2) a 5 ms internal power-on delay prevents writes during supply ramp-up, and (3) write inhibition occurs whenever CE is high, OE is low, or WE is high. These features ensure robust immunity to spurious writes during power transients or software faults in the AT28BV16-30JC's host system.
Can the AT28BV16-30JC be used as a direct replacement for older 27C256 EPROMs?
The AT28BV16-30JC uses a JEDEC-approved byte-wide pinout identical to 27C256 and other 2K×8 parallel memories, enabling socket-level replacement in many cases. However, unlike EPROMs, the AT28BV16-30JC requires no UV erasure and supports in-system byte writes. Voltage compatibility (2.7–3.6 V vs. 5 V) and absence of RDY/BUSY on PLCC must be verified in the target design before substitution.
How does DATA polling work on the AT28BV16-30JC?
During a byte write, reading the addressed location returns the complement of the written data on I/O7 (other bits are indeterminate). When the write completes, true data appears on all outputs including I/O7. This allows the host MCU to poll I/O7 in a tight loop without fixed delays-reducing average write latency and freeing the bus for other tasks while the AT28BV16-30JC executes its internal self-timed programming sequence.
Is there additional memory space for device identification in the AT28BV16-30JC?
Yes, the AT28BV16-30JC includes 32 bytes of dedicated EEPROM space (addresses 7E0H–7FFH) accessible only when A9 is biased to 12 V ±0.5 V. This area supports permanent device serialization, factory calibration data, or revision tracking without consuming main array space-enabling traceability and configuration integrity in regulated AT28BV16-30JC deployments.
AT28BV16-30JC 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:
- 3ms
- Access Time:
- 300 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT28BV16-30JC FAQ
1.How can I place an order for AT28BV16-30JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV16-30JC 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 AT28BV16-30JC reliable?
The price and inventory of AT28BV16-30JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV16-30JC is usually 5 days.
3.What payment methods are accepted for AT28BV16-30JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV16-30JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV16-30JC?
AT28BV16-30JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV16-30JC 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 AT28BV16-30JC?
For technical support, including AT28BV16-30JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV16-30JC requirements.
6.How does Aetrix verify that AT28BV16-30JC is sourced from the original manufacturer or authorized distributors?
All AT28BV16-30JC 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 AT28BV16-30JC meets industry standards.
7.What is the process for return or replacement of AT28BV16-30JC?
All AT28BV16-30JC units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV16-30JC, 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 AT28BV16-30JC part is unused and in its original packaging.
Return procedure for AT28BV16-30JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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