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Microchip Technology AT28BV64-30TI
- Part No.:
- AT28BV64-30TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT28BV64-30TI.pdf
- Description:
- IC EEPROM 64KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,954
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Product details
Overview
AT28BV64-30TI 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 is rated for industrial temperature (−40°C to +85°C).
For engineers reviewing the AT28BV64-30TI datasheet, AT28BV64-30TI pinout, AT28BV64-30TI application, or AT28BV64-30TI equivalent, key selection considerations include JEDEC-compliant byte-wide interface, low-voltage write enable, VCC-sense write protection, and compatibility with SRAM-like bus timing in embedded control and portable instrumentation.
Technical Context
The AT28BV64-30TI implements a self-timed byte-write architecture with internal clear-and-program logic, eliminating external timing components. It uses error correction for enhanced endurance (100,000 cycles) and data retention (10 years), and includes 32 bytes of auxiliary EEPROM for device identification.
Its dual write-detection methods-open-drain RDY/BUSY output and I/O7 DATA polling-enable flexible host synchronization. Write inhibition is enforced by VCC sensing (<1.8V threshold), 10 ms power-on delay, and triple-input logic (CE/OE/WE state validation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8,192 × 8), directly addressable as SRAM without address latching logic |
| Read Access Time | 300 ns - meets timing for 3.3V microcontrollers running ≤3.3 MHz bus clocks |
| Byte Write Cycle | 3 ms - internally timed; no external wait-state generation required |
| Supply Voltage | 2.7V–3.6V - compatible with single-cell Li-ion and regulated 3.3V rails |
| Standby Current | 50 µA - enables multi-year battery life in sleep-mode sensor nodes |
| Endurance | 100,000 write/erase cycles - sufficient for firmware patching and configuration logging |
| Data Retention | 10 years at +85°C - validated for industrial deployment without refresh |
Pinout & Package
AT28BV64-30TI is packaged in a 28-lead Plastic Thin Small Outline Package (TSOP), compliant with JEDEC MO-153AA. Pinout follows standard byte-wide parallel EEPROM configuration with dedicated RDY/BUSY open-drain output and no-connect (NC) pins per datasheet revision 0493A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit latch for 8K-word addressing; compatible with 8051, Z80, and ARM7 bus interfaces |
| I/O0–I/O7 | Bidirectional Data Bus | True 8-bit parallel interface; supports both read and write without direction control pin |
| CE | Chip Enable | Active-low chip select; enables memory access only when asserted with OE/WE in valid states |
| OE | Output Enable | Active-low read gate; places outputs in high-Z when deasserted, preventing bus contention |
| WE | Write Enable | Active-low write strobe; initiates self-timed byte programming on rising edge |
| RDY/BUSY | Open-Drain Status Output | Pulled low during write; allows wired-OR connection of multiple devices to shared status 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 interrupt |
| VCC Sense Write Inhibit | Prevents corruption during brown-out by disabling writes below ~1.8V, independent of host control |
| Internal Error Correction | Extends effective endurance and retention beyond base CMOS process limits |
| JEDEC Byte-Wide Pinout | Ensures drop-in compatibility with legacy 28-series EEPROMs and existing PCB footprints |
| Industrial Temperature Range | Validated operation from −40°C to +85°C for use in automotive body controllers and outdoor metering |
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 store accessed during boot and field updates; operates under intermittent 3.3V supply from energy-harvesting circuits. Use Value: 50 µA standby current extends battery life beyond 10 years; 100,000-cycle endurance supports lifetime firmware revisions. | Use Scenario: Retaining I/O mapping, ladder logic parameters, and alarm thresholds in programmable logic controllers used in factory automation. IC Role / Device Role / Timing Role: Parallel EEPROM interfaced to 8-bit microcontroller bus; provides deterministic 300 ns read latency for real-time parameter fetches. Use Value: RDY/BUSY signaling eliminates polling overhead; industrial temp rating ensures reliability in uncooled control cabinets. |
| Medical Device Calibration Data | Automotive Body Control Module NVM |
Use Scenario: Storing sensor offset/gain values and user preferences in portable diagnostic equipment with lithium coin-cell backup. IC Role / Device Role / Timing Role: Low-voltage nonvolatile memory mapped into microcontroller address space; accessed during power-up and service mode. Use Value: 2.7V minimum VCC enables operation down to end-of-life battery voltage; 10-year data retention meets medical regulatory requirements. | Use Scenario: Holding door lock logic, mirror position presets, and lighting profiles in automotive BCMs exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: JEDEC-standard EEPROM replacing older 28C64; integrated into CAN-connected ECU with SRAM-like bus interface. Use Value: −40°C to +85°C rating matches AEC-Q100 Grade 3; VCC-sense protection prevents corruption during cold-cranking transients. |
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 VCC-sense write inhibit | Requires 5V rail and external brown-out protection; not suitable for battery-only systems | Select only if legacy 5V design and faster access are mandatory |
| M95640-DWMN6TP | Serial SPI interface; 2.5–5.5V; 5 ms write cycle; no RDY/BUSY pin | Reduces pin count but adds software overhead; incompatible with parallel bus architectures | Choose for space-constrained designs where serial interface is acceptable |
Compared with AT28C64B-15PU and M95640-DWMN6TP, the AT28BV64-30TI uniquely combines low-voltage operation, parallel bus compatibility, hardware write-status signaling, and industrial temperature support - making it optimal for SRAM-replacement NVM in portable and harsh-environment embedded systems.
Availability
AT28BV64-30TI 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 AT28BV64-30TI 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.
The AT28BV64 product line was designed for low-power, battery-operated embedded systems requiring reliable, pin-compatible EEPROM replacement of older 5V families - with emphasis on write safety, extended data retention, and industrial-grade environmental tolerance.
FAQ
What is the maximum operating temperature range for the AT28BV64-30TI?
The AT28BV64-30TI is rated for industrial temperature operation from −40°C to +85°C. This specification is validated per the datasheet's DC and AC operating range table and applies to all electrical characteristics including read access time, write cycle duration, and standby current. The AT28BV64-30TI maintains full functionality across this range without derating.
Does the AT28BV64-30TI require an external programming voltage (VPP)?
No, the AT28BV64-30TI does not require an external VPP. It performs all write operations using only the standard 2.7V–3.6V VCC supply. Internal charge pumps generate necessary high-voltage programming signals, eliminating the need for additional power rails or external circuitry - a key feature distinguishing it from earlier 5V EEPROM families.
How does DATA polling work on the AT28BV64-30TI?
During a byte write, the AT28BV64-30TI inverts bit I/O7 on successive reads: complement data appears while busy, and true data returns upon completion. This allows host firmware to poll I/O7 without dedicated hardware interrupts. The AT28BV64-30TI guarantees this behavior across its full voltage and temperature range, with no additional timing constraints beyond standard read cycles.
Is the AT28BV64-30TI pin-compatible with the AT28C64B?
Yes, the AT28BV64-30TI shares the same JEDEC-approved byte-wide pinout as the AT28C64B, including identical A0–A12, I/O0–I/O7, CE, OE, WE, and RDY/BUSY assignments. However, the AT28BV64-30TI substitutes VCC/GND for the AT28C64B's VPP pin, and its RDY/BUSY pin is open-drain versus the AT28C64B's totem-pole output - requiring pull-up in shared-bus configurations.
What write protection mechanisms are built into the AT28BV64-30TI?
The AT28BV64-30TI implements three hardware-based write protections: (1) VCC sense that disables writes below ~1.8V, (2) automatic 10 ms power-on delay before enabling writes, and (3) logical write inhibit requiring simultaneous CE low, OE high, and WE low. These operate independently of software, ensuring robustness against power glitches and erroneous host commands - a core safety feature of the AT28BV64-30TI design.
AT28BV64-30TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT28BV64-30TI FAQ
1.How can I place an order for AT28BV64-30TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV64-30TI 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 AT28BV64-30TI reliable?
The price and inventory of AT28BV64-30TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV64-30TI is usually 5 days.
3.What payment methods are accepted for AT28BV64-30TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV64-30TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV64-30TI?
AT28BV64-30TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV64-30TI 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 AT28BV64-30TI?
For technical support, including AT28BV64-30TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV64-30TI requirements.
6.How does Aetrix verify that AT28BV64-30TI is sourced from the original manufacturer or authorized distributors?
All AT28BV64-30TI 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 AT28BV64-30TI meets industry standards.
7.What is the process for return or replacement of AT28BV64-30TI?
All AT28BV64-30TI units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV64-30TI, 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 AT28BV64-30TI part is unused and in its original packaging.
Return procedure for AT28BV64-30TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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