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Microchip Technology AT28BV16-25TC
- Part No.:
- AT28BV16-25TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT28BV16-25TC.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,285
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Product details
Overview
AT28BV16-25TC from Atmel is a 16K (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 2.7–3.6 V operation, 250 ns read access time, and CMOS-compatible I/O. It supports direct microprocessor control via DATA polling and RDY/BUSY signaling in TSOP package, used in industrial control firmware storage and embedded configuration memory.
For engineers reviewing the AT28BV16-25TC datasheet, AT28BV16-25TC pinout, AT28BV16-25TC application, or AT28BV16-25TC equivalent, key selection criteria include voltage range compatibility, write endurance (100,000 cycles), standby current (≤50 µA), and TSOP-28 package footprint for space-constrained PCBs.
Technical Context
The AT28BV16-25TC operates as a byte-addressable nonvolatile memory with static RAM-like read/write interface-no external timing logic required. Its internal self-timed write cycle (3 ms) uses DATA polling on I/O7 or RDY/BUSY open-drain output to signal completion.
Write protection includes VCC sense (<2.0 V inhibits writes), 5 ms power-on delay, and hardware inhibit via CE/OE/WE states. An extra 32-byte identification EEPROM (accessible at 7E0H–7FFH with A9 = 12 V) enables device tracking without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits) - fits small boot code or calibration tables in resource-limited systems |
| Read Access Time | 250 ns - supports 4 MHz bus timing without wait states in 8-bit microcontroller interfaces |
| Write Cycle Time | 3.0 ms - defines minimum interval between successive byte writes; impacts firmware update latency |
| Supply Voltage | 2.7–3.6 V - compatible with 3.3 V logic rails and battery-backed systems down to 2.7 V |
| Endurance | 100,000 write/erase cycles - sufficient for field-updatable configuration storage in industrial equipment |
| Data Retention | 10 years at 85°C - ensures long-term reliability in automotive or industrial temperature environments |
| Standby Current | 50 µA - enables low-power sleep modes in portable or energy-harvesting applications |
Pinout & Package
AT28BV16-25TC is packaged in a 28-lead Plastic Thin Small Outline Package (TSOP), JEDEC MS-016AE compliant, with 0.55 mm lead pitch and 11.8 mm × 8.0 mm body size. Pin 1 is marked by a notch or dot; leads are gull-wing shaped for surface-mount reflow assembly.
| 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 data path; high-impedance when chip disabled; supports byte-level reads/writes |
| CE | Chip Enable | Active-low global enable; must be low for any read/write; controls device selection in multi-chip systems |
| OE | Output Enable | Active-low read control; allows output tristating independent of CE for bus sharing |
| WE | Write Enable | Active-low write strobe; initiates byte write when CE low and OE high; latches address/data edges |
| RDY/BUSY | Open-Drain Status Output | Low during internal write; released high at completion; requires external pull-up for system polling |
| VCC, GND | Power Supply | 2.7–3.6 V core supply; decoupling capacitor recommended near VCC pin for noise immunity |
| NC, DC | No Connect / Don't Connect | Unbonded pins; must remain unconnected per design; no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| DATA Polling Support | Enables software-driven write completion detection using I/O7 complement behavior-no dedicated status lines needed |
| Internal Write Timing | Eliminates need for external write pulse generators or timing controllers; simplifies microprocessor interface |
| VCC Sense Protection | Prevents accidental writes during brown-out or power ramp-up by disabling write function below 2.0 V |
| JEDEC Byte-Wide Pinout | Ensures drop-in compatibility with legacy 27C256/28C256 sockets and existing PCB layouts |
| User-Accessible ID Memory | 32-byte EEPROM block (7E0H–7FFH) supports unique device serialization or calibration data storage |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via 8-bit parallel bus during startup and runtime updates. Use Value: 10-year data retention and 100,000-cycle endurance ensure reliable recalibration over product lifetime without field service. | Use Scenario: Holding sensor offset/gain coefficients and safety-critical operational parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-voltage EEPROM for storing FDA-compliant calibration records accessible only during maintenance mode. Use Value: 2.7–3.6 V operation aligns with medical-grade battery packs; RDY/BUSY pin enables deterministic firmware update sequencing. |
| Automotive Body Control Module (BCM) | Point-of-Sale Terminal Firmware Backup |
Use Scenario: Retaining door lock programming, mirror position presets, and lighting profiles in BCMs exposed to automotive thermal cycling. IC Role / Device Role / Timing Role: Parallel EEPROM interfaced directly to 8051-based MCU for fast read access and infrequent write operations. Use Value: Industrial temperature rating (-40°C to +85°C) and 50 µA standby current reduce thermal stress and extend battery backup life. | Use Scenario: Preserving transaction log headers and encryption keys in retail terminals where main power may be interrupted unexpectedly. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory that retains critical state data during AC power loss or battery depletion. Use Value: VCC sense and 5 ms power-on delay prevent corruption during brown-out events common in commercial power grids. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C16 | Same 16K × 8 organization but 5 V only (4.5–5.5 V); no low-voltage operation | Requires level-shifting in 3.3 V systems; not suitable for battery-powered designs | Select AT28C16 only if legacy 5 V bus architecture exists and voltage translation is acceptable |
| M95160-DW | 16 Kbit SPI EEPROM; serial interface; 2.5–5.5 V; 5 ms write time; no RDY/BUSY pin | Reduces pin count but adds software overhead for SPI protocol handling and polling delays | Choose M95160-DW when board space is constrained and microcontroller has spare SPI peripheral |
Compared with AT28C16 and M95160-DW, the AT28BV16-25TC uniquely balances parallel-speed access, 3.3 V compatibility, and hardware-ready signaling-making it optimal for microprocessor-based systems needing deterministic, low-overhead nonvolatile storage without bus arbitration complexity.
Availability
AT28BV16-25TC is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and point-of-sale terminals requiring stable component supply across extended temperature ranges.
Supply support for AT28BV16-25TC 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 AT28BV16 product line delivers low-voltage, high-reliability parallel EEPROMs designed for embedded systems requiring robust, pin-compatible replacements for legacy EPROM/EEPROM devices in industrial and automotive applications.
FAQ
What is the maximum operating frequency supported by the AT28BV16-25TC?
The AT28BV16-25TC does not operate at a clock frequency-it is a parallel asynchronous EEPROM. Its 250 ns read access time corresponds to a maximum effective bus toggle rate of ~4 MHz under ideal conditions. System timing depends on microprocessor wait-state configuration and address/data setup/hold requirements specified in the AC characteristics table, not an internal clock.
Can the AT28BV16-25TC be used in place of a 27C256 EPROM?
Yes, the AT28BV16-25TC shares the JEDEC-standard byte-wide pinout with the 27C256, enabling socket-level replacement in many designs. However, unlike UV-erasable EPROMs, the AT28BV16-25TC supports in-system electrical erasure and writing, eliminating the need for EPROM programmers or UV erasers-though write timing and control signals (WE, RDY/BUSY) differ.
Does the AT28BV16-25TC require external circuitry for write protection?
No, the AT28BV16-25TC includes three layers of hardware write protection: VCC sense (disables writes below ~2.0 V), automatic 5 ms power-on delay, and real-time inhibit via CE/OE/WE logic states. No external hardware (e.g., jumpers or resistors) is needed unless additional system-level locking is desired.
How is the RDY/BUSY pin used in the AT28BV16-25TC?
The RDY/BUSY pin on the AT28BV16-25TC is an open-drain output that pulls low during internal write operations and releases high upon completion. It requires an external pull-up resistor (typically 4.7 kΩ to VCC). This signal allows hardware polling without consuming I/O pins for DATA polling, reducing software overhead in time-critical applications.
Is the 32-byte identification memory in the AT28BV16-25TC accessible during normal operation?
Yes, the 32-byte ID memory (addresses 7E0H–7FFH) in the AT28BV16-25TC is fully accessible during normal operation-but only when A9 is raised to 12 ± 0.5 V. Under standard 3.3 V operation, those addresses behave as regular memory. This dual-mode access prevents accidental overwrite while enabling secure device serialization during manufacturing or field service.
AT28BV16-25TC 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:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 3ms
- Access Time:
- 250 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT28BV16-25TC FAQ
1.How can I place an order for AT28BV16-25TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV16-25TC 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 AT28BV16-25TC reliable?
The price and inventory of AT28BV16-25TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV16-25TC is usually 5 days.
3.What payment methods are accepted for AT28BV16-25TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV16-25TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV16-25TC?
AT28BV16-25TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV16-25TC 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 AT28BV16-25TC?
For technical support, including AT28BV16-25TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV16-25TC requirements.
6.How does Aetrix verify that AT28BV16-25TC is sourced from the original manufacturer or authorized distributors?
All AT28BV16-25TC 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 AT28BV16-25TC meets industry standards.
7.What is the process for return or replacement of AT28BV16-25TC?
All AT28BV16-25TC units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV16-25TC, 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 AT28BV16-25TC part is unused and in its original packaging.
Return procedure for AT28BV16-25TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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