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Microchip Technology AT28BV64-30PC
- Part No.:
- AT28BV64-30PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28BV64-30PC.pdf
- Description:
- IC EEPROM 64KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,809
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Product details
Overview
AT28BV64-30PC from Atmel is a 64K (8K × 8) parallel EEPROM designed for battery-powered systems, operating at 2.7V–3.6V with 300 ns read access time, 3 ms byte write cycle, and 50 µA CMOS standby current. It supports direct microprocessor control via READY/BUSY and DATA polling, and features JEDEC-approved byte-wide pinout in PDIP package.
For engineers reviewing the AT28BV64-30PC datasheet, AT28BV64-30PC pinout, AT28BV64-30PC application, or AT28BV64-30PC equivalent, key selection criteria include low-voltage operation, embedded write-cycle detection methods, industrial temperature support, and compatibility with SRAM-like bus interfacing without external timing logic.
Technical Context
The AT28BV64-30PC implements a self-timed byte-write architecture with internal clear-and-write sequencing, eliminating need for external write pulse control. It uses CMOS nonvolatile technology with error correction for 100,000 endurance cycles and 10-year data retention.
Two hardware-based write completion detection mechanisms are supported: open-drain RDY/BUSY output for level-sensing and DATA polling on I/O7 (complement-to-data during write, true data upon completion), enabling flexible integration with 8-bit microcontrollers and memory-mapped peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8,192 × 8), directly addressable as byte-wide parallel memory |
| Supply Voltage | 2.7V–3.6V - enables single-supply operation in 3V battery or regulated systems |
| Read Access Time | 300 ns - compatible with 3.3 MHz bus timing without wait states |
| Byte Write Cycle | 3 ms - internally timed; no external write strobe required |
| Standby Current | 50 µA - supports multi-year battery life in always-on low-power nodes |
| Endurance | 100,000 write/erase cycles - suitable for field-updatable configuration storage |
| Data Retention | 10 years at 85°C - validated for industrial deployment without refresh |
Pinout & Package
AT28BV64-30PC is supplied in a 28-lead, 0.600" wide plastic dual in-line package (PDIP), per JEDEC MS-011 AB standard. Pin 1 is index-marked; pin 14 is GND; pin 28 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus for full 8K-word decoding; latched on WE/CE falling edge |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; supports DATA polling on I/O7 during write |
| CE | Chip Enable | Active-low chip select; initiates write when combined with OE high and WE low |
| OE | Output Enable | Active-low read control; high-Z outputs when deasserted to prevent bus contention |
| WE | Write Enable | Active-low write strobe; falling edge latches address and data for self-timed programming |
| RDY/BUSY | Open-Drain Status Output | Pulled low during write; released high at completion; supports wired-OR of multiple devices |
| NC | No Connect | Pin 16 (PDIP); must be left unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed byte write | Eliminates external timing circuitry; 3 ms fixed duration ensures deterministic firmware delay handling |
| Dual write-completion detection | RDY/BUSY level sensing + I/O7 DATA polling provides redundancy for robust real-time system integration |
| VCC sense write inhibit | Prevents corruption during power ramp-up or brownout by disabling writes below ~1.8V |
| JEDEC byte-wide pinout | Direct drop-in replacement for legacy SRAM and EPROM sockets without PCB redesign |
| Industrial temperature range | -40°C to +85°C operation validated per AC/DC specs - suitable for automotive body electronics and factory automation |
Applications
| Smart Meter Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing tariff tables, calibration coefficients, and firmware patches in electricity/water meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed infrequently but requiring guaranteed integrity across 10+ year field life and frequent power cycling. Use Value: 100,000 endurance cycles and 10-year data retention ensure reliable updates over meter lifetime without field replacement. | Use Scenario: Holding user-defined ladder logic parameters and I/O mapping in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: Parallel EEPROM mapped into microcontroller address space for fast read access and safe field reconfiguration. Use Value: 300 ns read access enables zero-wait-state execution; RDY/BUSY signaling prevents race conditions during parameter writes. |
| Medical Device Calibration Data | Automotive Body Control Module Settings |
Use Scenario: Storing sensor offset values, gain factors, and safety-critical calibration constants in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory with VCC-sense write protection to prevent accidental overwrite during battery swaps. Use Value: 50 µA standby current extends battery runtime; write-inhibit logic ensures data integrity during power transitions. | Use Scenario: Retaining seat/mirror position presets, lighting profiles, and door lock configurations in 12V automotive systems with wide input voltage transients. IC Role / Device Role / Timing Role: 2.7V–3.6V operation tolerates cold-crank voltage dips; industrial temp rating supports under-hood placement. Use Value: JEDEC pinout allows reuse of existing PCB footprints; 8K × 8 organization matches typical BCU parameter set size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C64B-15PU | 5V-only supply (4.5–5.5V); 150 ns access; no RDY/BUSY pin; requires external write timing | Limited to 5V systems; lacks hardware write completion signaling; higher active current (25 mA) | Select only if legacy 5V design exists and write-cycle polling is handled in firmware |
| M95640-DW DW | SPI serial interface; 2.5–5.5V supply; 5 ms write time; no parallel bus or RDY/BUSY | Requires SPI controller and software driver; incompatible pinout and protocol; lower pin count | Choose for space-constrained designs where serial interface suffices and bus bandwidth is not critical |
Compared with AT28C64B-15PU and M95640-DW DW, the AT28BV64-30PC uniquely delivers 3V-compatible parallel operation with hardware-assisted write synchronization-enabling simpler, more deterministic integration in battery-powered 8-bit microcontroller systems without sacrificing endurance or retention.
Availability
AT28BV64-30PC is available at Aetrix Electronics and suitable for smart meter firmware storage, industrial PLC configuration memory, and medical device calibration data requiring stable component supply and long-term lifecycle support.
Supply support for AT28BV64-30PC 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 company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for embedded applications.
The AT28BV64 product line was designed specifically for low-voltage, battery-operated systems requiring reliable, SRAM-compatible parallel EEPROM with integrated write-cycle management and extended data retention.
FAQ
What is the operating voltage range of the AT28BV64-30PC?
The AT28BV64-30PC operates from 2.7V to 3.6V DC. This low-voltage range enables direct integration into 3V battery-powered systems and eliminates the need for level-shifting when interfacing with 3.3V microcontrollers. The device includes VCC-sense write inhibition to prevent data corruption during brownout conditions below ~1.8V.
Does the AT28BV64-30PC support hardware write completion detection?
Yes, the AT28BV64-30PC provides two hardware-supported methods: an open-drain RDY/BUSY pin that goes low during write and releases high upon completion, and DATA polling on I/O7, which returns the complement of written data until the cycle finishes. Both mechanisms are fully documented in the AT28BV64-30PC datasheet and require no external components.
What package type is used for the AT28BV64-30PC?
The AT28BV64-30PC is packaged in a 28-lead, 0.600" wide plastic dual in-line package (PDIP), designated as 28P6 per Atmel's ordering information. It conforms to JEDEC MS-011 AB mechanical standards and features pin 1 index marking and standard through-hole mounting.
How many write/erase cycles does the AT28BV64-30PC guarantee?
The AT28BV64-30PC guarantees 100,000 write/erase cycles per memory location. This endurance rating is specified under standard operating conditions and validated using Atmel's internal error-correction-enhanced CMOS process, making it suitable for applications requiring frequent field updates such as firmware patching or configuration logging.
Is the AT28BV64-30PC compatible with standard SRAM bus timing?
Yes, the AT28BV64-30PC is accessed like a static RAM for both read and write operations - CE, OE, and WE control signals follow standard SRAM timing conventions. Its 300 ns read access time and self-timed 3 ms write cycle allow direct connection to 8-bit microprocessors without additional glue logic or wait-state generation.
AT28BV64-30PC 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:
- 64Kbit
- Memory Organization:
- 8K 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:
- Through Hole
- Supplier Device Package:
- 28-PDIP
AT28BV64-30PC FAQ
1.How can I place an order for AT28BV64-30PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV64-30PC 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 AT28BV64-30PC reliable?
The price and inventory of AT28BV64-30PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV64-30PC is usually 5 days.
3.What payment methods are accepted for AT28BV64-30PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV64-30PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV64-30PC?
AT28BV64-30PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV64-30PC 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 AT28BV64-30PC?
For technical support, including AT28BV64-30PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV64-30PC requirements.
6.How does Aetrix verify that AT28BV64-30PC is sourced from the original manufacturer or authorized distributors?
All AT28BV64-30PC 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 AT28BV64-30PC meets industry standards.
7.What is the process for return or replacement of AT28BV64-30PC?
All AT28BV64-30PC units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV64-30PC, 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 AT28BV64-30PC part is unused and in its original packaging.
Return procedure for AT28BV64-30PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT28BV64-30PC Tags
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