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Microchip Technology AT28BV64-30PI
- Part No.:
- AT28BV64-30PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28BV64-30PI.pdf
- Description:
- IC EEPROM 64KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,793
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Product details
Overview
AT28BV64-30PI 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 open-drain output and DATA polling, and is qualified for industrial temperature range (−40°C to +85°C).
For engineers reviewing the AT28BV64-30PI datasheet, AT28BV64-30PI pinout, AT28BV64-30PI application, or AT28BV64-30PI equivalent, key selection considerations include its JEDEC-approved byte-wide parallel interface, low-voltage write enable, VCC-sense write protection, and compatibility with SRAM-like bus timing in embedded control and firmware storage.
Technical Context
The AT28BV64-30PI implements a parallel byte-wide EEPROM architecture with internal self-timed write cycles, eliminating external timing components. It uses CMOS nonvolatile technology with built-in error correction for 100,000 write/erase endurance and 10-year data retention.
Its dual write-detection methods-RDY/BUSY open-drain output and I/O7 DATA polling-enable flexible host synchronization without dedicated status registers. Write protection is enforced by VCC sensing (<1.8V inhibit), 10 ms power-on delay, and logic-level gating (CE/OE/WE states).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8,192 × 8), directly addressable as byte-wide SRAM-compatible memory space |
| Supply Voltage | 2.7V–3.6V - enables operation from single Li-ion or 3-cell alkaline batteries without regulation |
| Read Access Time | 300 ns - supports 3.3 MHz bus timing with standard microcontroller wait-state logic |
| Byte Write Cycle | 3 ms - internally timed; no external strobe or clock required during programming |
| Standby Current | 50 µA - minimizes quiescent drain in battery-backed real-time clocks and sleep-mode controllers |
| Endurance | 100,000 cycles - sufficient for firmware patching, calibration storage, and configuration logging |
| Data Retention | 10 years at 85°C - validated for industrial deployment without refresh or backup power |
Pinout & Package
AT28BV64-30PI is packaged in a 28-pin plastic dual inline package (PDIP), 0.600" wide, with JEDEC MS-011 AB compliance and through-hole mounting. Pin 1 is RDY/BUSY (open-drain), and pins A0–A12 provide full 13-bit addressing; I/O0–I/O7 support bidirectional 8-bit data transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit latch for selecting one of 8,192 memory locations; compatible with 8051, Z80, and 68K address buses |
| I/O0–I/O7 | Bidirectional Data Bus | True 8-bit parallel interface; high-impedance when CE or OE is high to prevent bus contention |
| CE | Chip Enable | Active-low chip select; must be low for read/write; enables multi-device decoding on shared bus |
| OE | Output Enable | Active-low gate for output drivers; allows read operations without asserting CE (for memory-mapped I/O) |
| WE | Write Enable | Active-low control for byte write initiation; falling edge latches address, rising edge latches data |
| RDY/BUSY | Open-Drain Status Output | Pulled low during internal write; supports wired-OR connection across multiple EEPROMs on same line |
| VCC, GND | Power Supply | Single 2.7–3.6V supply; no separate VPP or programming voltage required |
Key Features
| Feature | Design Value |
|---|---|
| DATA Polling on I/O7 | Enables software-driven write completion detection without external hardware or interrupts |
| VCC Sense Write Inhibit | Prevents corruption during brown-out or power-up by disabling writes until stable 2.7V+ is reached |
| JEDEC Byte-Wide Pinout | Drop-in replacement for industry-standard 28-pin parallel EEPROMs (e.g., 28C64, 28C256 variants) |
| Internal Self-Timed Write | Eliminates need for external write pulse generators or timing controllers in MCU-based systems |
| Industrial Temperature Range | Validated operation from −40°C to +85°C for use in automotive body control modules and industrial PLCs |
Applications
| Smart Meter Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing tariff tables, calibration coefficients, and firmware patches in electricity/water meters deployed outdoors. IC Role / Device Role / Timing Role: Nonvolatile configuration and update storage with SRAM-compatible read/write timing and battery-backed reliability. Use Value: 50 µA standby current extends 10-year battery life; 100,000-cycle endurance supports field firmware updates over product lifetime. | Use Scenario: Retaining I/O mapping, PID tuning parameters, and safety logic state in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: Parallel EEPROM used as persistent parameter store accessible via microcontroller's memory-mapped bus. Use Value: 300 ns read access integrates seamlessly with 8-bit/16-bit MCUs; −40°C to +85°C rating ensures reliability in uncontrolled cabinet temperatures. |
| Medical Device Calibration Data | Automotive Body Control Module |
Use Scenario: Holding sensor offset/gain values and regulatory audit logs in portable diagnostic equipment requiring traceable calibration history. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with write-protection logic preventing accidental overwrites during power transitions. Use Value: VCC-sense and 10 ms power-on delay guarantee data integrity during battery swaps or cold starts; 10-year retention meets medical device shelf-life requirements. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive interior control units powered from 12V battery via LDO. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 8-bit automotive MCU without level-shifting. Use Value: 2.7–3.6V operation matches post-regulation supply rails; RDY/BUSY output simplifies interrupt-driven write coordination in real-time CAN gateway firmware. |
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; 10,000-cycle endurance; PDIP-28 package | Requires 5V rail; unsuitable for battery-powered designs; lower endurance limits field update frequency | Select only if legacy 5V system design mandates pin-compatible upgrade without voltage regulator change |
| M95640-DW DW | 3V SPI serial interface; 20 MHz max clock; 5 ms write cycle; SO8 package | Serial interface reduces pin count but requires SPI driver code and adds protocol overhead vs. parallel bus | Choose for space-constrained PCBs where board area savings outweigh added firmware complexity and slower random-access latency |
Compared with AT28C64B-15PU and M95640-DW DW, the AT28BV64-30PI uniquely balances low-voltage operation, SRAM-like parallel timing, industrial temperature rating, and robust write protection-making it optimal for battery-backed embedded controllers needing deterministic, interrupt-free firmware storage.
Availability
AT28BV64-30PI 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 across long-lifecycle programs.
Supply support for AT28BV64-30PI 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) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for embedded systems.
The AT28BV64 product line was engineered for low-power, battery-operated applications requiring reliable, pin-compatible EEPROM with SRAM-like interface simplicity and extended data retention.
FAQ
What is the operating voltage range of the AT28BV64-30PI?
The AT28BV64-30PI operates from 2.7V to 3.6V DC. This low-voltage range enables direct integration into battery-powered systems such as smart meters and portable medical devices without requiring external voltage regulation. The device includes VCC-sense circuitry that inhibits writes below ~1.8V to prevent data corruption during brown-out conditions.
Does the AT28BV64-30PI require an external programming voltage (VPP)?
No, the AT28BV64-30PI does not require an external VPP pin or programming voltage. All write operations are performed using only the standard 2.7–3.6V VCC supply. Internal charge pumps generate necessary high-voltage transients, enabling true single-supply operation and simplifying PCB layout compared to older 5V EEPROM families.
How is write completion detected on the AT28BV64-30PI?
The AT28BV64-30PI provides two hardware-supported methods: (1) the open-drain RDY/BUSY pin pulls low during internal write and releases high upon completion; (2) DATA polling reads I/O7 - it returns the complement of written data until completion, then returns true data. Both methods allow the host MCU to synchronize without fixed delays or external timers.
What is the endurance and data retention specification for the AT28BV64-30PI?
The AT28BV64-30PI guarantees 100,000 write/erase cycles and 10 years of data retention at +85°C. These specifications are validated per JEDEC standards and apply across the full industrial temperature range (−40°C to +85°C). Internal error correction enhances both metrics beyond baseline CMOS EEPROM process capabilities.
Is the AT28BV64-30PI pin-compatible with other 28-pin parallel EEPROMs?
Yes, the AT28BV64-30PI uses a JEDEC-approved byte-wide pinout identical to industry-standard 28-pin parallel EEPROMs including the 28C64 and 28C256 families. Its PDIP-28 package (28P6) maintains mechanical and electrical compatibility, enabling drop-in replacement in existing designs-provided the host system supports 2.7–3.6V operation and updated timing margins.
AT28BV64-30PI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
AT28BV64-30PI FAQ
1.How can I place an order for AT28BV64-30PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV64-30PI 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 AT28BV64-30PI reliable?
The price and inventory of AT28BV64-30PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV64-30PI is usually 5 days.
3.What payment methods are accepted for AT28BV64-30PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV64-30PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV64-30PI?
AT28BV64-30PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV64-30PI 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 AT28BV64-30PI?
For technical support, including AT28BV64-30PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV64-30PI requirements.
6.How does Aetrix verify that AT28BV64-30PI is sourced from the original manufacturer or authorized distributors?
All AT28BV64-30PI 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 AT28BV64-30PI meets industry standards.
7.What is the process for return or replacement of AT28BV64-30PI?
All AT28BV64-30PI units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV64-30PI, 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 AT28BV64-30PI part is unused and in its original packaging.
Return procedure for AT28BV64-30PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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