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Microchip Technology AT28BV16-30PI
- Part No.:
- AT28BV16-30PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 24-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28BV16-30PI.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,571
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Product details
Overview
AT28BV16-30PI from Atmel is a 16 Kbit (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 300 ns read access time, 3 ms byte write cycle, and 2.7–3.6 V single-supply operation. It supports direct microprocessor control via DATA polling and RDY/BUSY output (TSOP only), and is rated for industrial temperature (−40°C to +85°C) in 24-lead PDIP package.
For engineers reviewing the AT28BV16-30PI datasheet, AT28BV16-30PI pinout, AT28BV16-30PI application, or AT28BV16-30PI equivalent, key selection criteria include its low-voltage CMOS compatibility, 100,000 write endurance, 10-year data retention, and support for bus-contention-free read/write using dual-line CE/OE control.
Technical Context
The AT28BV16-30PI operates as a drop-in parallel memory replacement for SRAM in legacy microprocessor systems, requiring no external timing or high-voltage programming circuitry. Its internal self-timed write cycle eliminates need for external write pulse generation, and DATA polling on I/O7 provides deterministic write completion detection without dedicated status pins beyond RDY/BUSY (TSOP variant).
It implements VCC-sense write protection, 5 ms power-on delay, and three-level hardware write inhibit (OE low, CE high, or WE high), ensuring robust immunity to inadvertent writes during power transitions. The device includes 32 bytes of user-accessible identification EEPROM at addresses 7E0H–7FFH, enabled by raising A9 to 12 V ± 0.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits); sufficient for firmware patch storage or configuration data in resource-constrained embedded controllers. |
| Read Access Time | 300 ns max; compatible with 3.3 V microcontrollers running ≤3 MHz bus clocks without wait states. |
| Byte Write Cycle | 3.0 ms typical; enables non-blocking host operation via DATA polling or RDY/BUSY signaling. |
| Supply Voltage | 2.7–3.6 V; interoperable with modern 3.3 V logic families and battery-backed systems. |
| Endurance | 100,000 write/erase cycles; suitable for infrequent parameter updates in industrial monitoring nodes. |
| Data Retention | 10 years at 85°C; validated for long-term reliability in unattended equipment deployments. |
| Standby Current | 50 µA max; reduces quiescent power in always-on sensor modules. |
Pinout & Package
AT28BV16-30PI is packaged in a 24-lead, 0.600" wide plastic DIP (PDIP) per JEDEC MS-011 AA, with through-hole mounting and 2.54 mm lead pitch. Pin 1 is marked by notch or dot; pin 12 is GND, pin 24 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus for accessing all 2,048 memory locations; TTL/CMOS compatible. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; latched during write, high-Z during standby/read disable. |
| CE | Chip Enable | Active-low chip select; must be low for any read/write; enables multi-device bus sharing. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads. |
| WE | Write Enable | Active-low write strobe; initiates byte write when CE low and OE high. |
| RDY/BUSY | Status Output | Open-drain signal (not present on PDIP); pulled low during internal write, released on completion. |
| GND / VCC | Power Terminals | Pins 12 and 24; decoupling capacitor required within 1 cm of VCC pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| DATA Polling Support | Enables real-time write completion detection on I/O7 without external hardware or timing margins. |
| VCC-Sense Write Protection | Automatically disables write function below 2.0 V, preventing corruption during brown-out conditions. |
| JEDEC Byte-Wide Pinout | Ensures mechanical and electrical compatibility with legacy 27C256/62256 socket designs and PCB footprints. |
| 32-Byte ID Memory | Provides factory or field-programmable device tracking and calibration data storage at 7E0H–7FFH. |
| Dual-Line Read Control (CE/OE) | Allows independent gating of chip select and output drivers to eliminate bus contention in shared-memory systems. |
Applications
| Industrial PLC Configuration Storage | Legacy Microcontroller Firmware Patching |
|---|---|
Use Scenario: Storing calibrated sensor offsets and operational thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via 8-bit parallel bus during system boot or runtime reconfiguration. Use Value: 10-year data retention and −40°C to +85°C operation ensure parameter integrity across extended maintenance cycles and thermal cycling. | Use Scenario: Field-updating bootloader code or communication protocol tables in 8-bit microcontrollers lacking internal flash reprogramming capability. IC Role / Device Role / Timing Role: External program memory mapped into CPU address space, supporting in-system byte-write without system reset. Use Value: 3 ms write time and DATA polling allow background update while main application continues execution. |
| Medical Device Calibration Data | Point-of-Sale Terminal Settings Backup |
Use Scenario: Preserving factory-calibrated ADC gain/offset coefficients and safety-critical operational limits in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element interfaced directly to microcontroller data bus with hardware write protection. Use Value: VCC-sense and 5 ms power-on delay prevent accidental overwrites during battery insertion or power-up transients. | Use Scenario: Maintaining tax rate tables, language packs, and printer configuration in retail terminals subject to frequent software updates. IC Role / Device Role / Timing Role: Parallel EEPROM acting as persistent BOM-managed configuration store accessible during cold boot and hot-swappable peripheral initialization. Use Value: JEDEC-standard pinout allows reuse of existing PCB layouts designed for 27C256, reducing redesign cost and time-to-market. |
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 | 32 Kbit (32,768 × 8), 150 ns access, same 24-pin PDIP package and voltage range. | Higher density and faster access, but requires updated address decoding for A11–A14 and may exceed timing budget in legacy 3 MHz systems. | Select when additional storage capacity is needed and board layout supports unchanged pinout with extended addressing. |
| ST M28W640ECB90N1Z | 64 Mbit Flash, 90 ns access, 48-pin TSOP, requires command-based sector erase and page programming. | Not pin-compatible; requires firmware rewrite for erase/write sequencing and lacks DATA polling on I/O7. | Consider only for new designs where density and cost-per-bit outweigh compatibility and simplicity requirements. |
Compared with AT28C256-15PI and ST M28W640ECB90N1Z, the AT28BV16-30PI offers guaranteed JEDEC pin compatibility and true byte-write simplicity for legacy upgrades, whereas alternatives trade ease of integration for higher density or lower cost-per-bit at the expense of controller overhead and layout changes.
Availability
AT28BV16-30PI is available at Aetrix Electronics and suitable for industrial PLCs, medical instrumentation, point-of-sale terminals, and legacy microcontroller-based systems requiring stable component supply with long lifecycle support.
Supply support for AT28BV16-30PI 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) was a leading designer of nonvolatile memory, microcontrollers, and analog ICs, known for robust industrial-grade components and long-term product availability.
The AT28BV16 product line was engineered for seamless replacement of EPROM and SRAM in legacy 8-bit and 16-bit embedded systems, emphasizing pin compatibility, low-voltage operation, and simplified write control without external high-voltage circuitry.
FAQ
What is the maximum operating temperature range for the AT28BV16-30PI?
The AT28BV16-30PI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the "DC and AC Operating Range" table of the official datasheet, and applies specifically to the -PI suffix variant. The device maintains full functionality-including 300 ns read access, 3 ms write cycle, and 50 µA standby current-across this entire range.
Does the AT28BV16-30PI support RDY/BUSY signaling?
No, the AT28BV16-30PI does not support RDY/BUSY signaling. That feature is explicitly limited to the TSOP (28T) package variant per the datasheet's "Pin Configurations" and "READY/BUSY (TSOP only)" section. The AT28BV16-30PI uses the 24-lead PDIP package, which omits the RDY/BUSY pin; write completion must be detected via DATA polling on I/O7.
Can the AT28BV16-30PI be used as a direct replacement for the AT28C256 in existing designs?
No, the AT28BV16-30PI cannot serve as a direct replacement for the AT28C256 due to fundamental differences in memory size (16 Kbit vs. 32 Kbit), address bus width (A0–A10 vs. A0–A14), and timing (300 ns vs. 150 ns access). While both share JEDEC byte-wide pinouts and 24-pin PDIP packaging, the AT28BV16-30PI lacks A11–A14 pins and delivers half the capacity, requiring address decoding and firmware adjustments.
What is the purpose of the 32-byte ID memory in the AT28BV16-30PI?
The 32-byte ID memory in the AT28BV16-30PI provides user-programmable storage at addresses 7E0H–7FFH for device-specific data such as calibration coefficients, serial numbers, or manufacturing lot codes. Access requires raising A9 to 12 V ± 0.5 V, and reads/writes follow standard byte-write protocols-enabling traceability and field customization without consuming main array space.
How does write protection work on the AT28BV16-30PI?
Write protection on the AT28BV16-30PI operates through three independent mechanisms: (1) VCC-sense inhibition below ~2.0 V, (2) automatic 5 ms power-on delay before write enable, and (3) hardware-level write inhibit when OE is low, CE is high, or WE is high. These features collectively prevent spurious writes during power-up, brown-out, or bus contention-ensuring data integrity without software intervention.
AT28BV16-30PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-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:
- 3ms
- Access Time:
- 300 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
AT28BV16-30PI FAQ
1.How can I place an order for AT28BV16-30PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV16-30PI 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 AT28BV16-30PI reliable?
The price and inventory of AT28BV16-30PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV16-30PI is usually 5 days.
3.What payment methods are accepted for AT28BV16-30PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV16-30PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV16-30PI?
AT28BV16-30PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV16-30PI 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 AT28BV16-30PI?
For technical support, including AT28BV16-30PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV16-30PI requirements.
6.How does Aetrix verify that AT28BV16-30PI is sourced from the original manufacturer or authorized distributors?
All AT28BV16-30PI 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 AT28BV16-30PI meets industry standards.
7.What is the process for return or replacement of AT28BV16-30PI?
All AT28BV16-30PI units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV16-30PI, 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 AT28BV16-30PI part is unused and in its original packaging.
Return procedure for AT28BV16-30PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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