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Microchip Technology AT28BV16-25PC
- Part No.:
- AT28BV16-25PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 24-DIP (0.600", 15.24mm)
- Datasheet:
-
AT28BV16-25PC.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
AT28BV16-25PC 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 3 ms byte write cycle-designed for microprocessor-controlled nonvolatile data storage in industrial control panels requiring reliable field-updatable configuration memory.
For engineers reviewing the AT28BV16-25PC datasheet, AT28BV16-25PC pinout, AT28BV16-25PC application, or AT28BV16-25PC equivalent, this page delivers verified electrical specs, TSOP-28 package mapping, DATA polling behavior, READY/BUSY signaling, and direct alternatives for legacy system maintenance and BOM refresh.
Technical Context
The AT28BV16-25PC operates as a drop-in SRAM-compatible parallel EEPROM: reads require CE and OE low with WE high; writes initiate on falling WE (or CE) edge while OE is high, latching address and data internally before autonomous self-clear-and-write execution. Its RDY/BUSY open-drain output (TSOP only) and I/O7 DATA polling provide deterministic write completion detection without external timing components.
It integrates VCC-sense write protection (disabled below 2.0 V), 5 ms power-on delay, and triple-level write inhibit logic (OE low / CE high / WE high). Internal error correction enhances endurance to 100,000 cycles and data retention to 10 years, with 32 bytes of user-accessible device ID space at addresses 7E0H–7FFH using A9 = 12 ± 0.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2,048 words × 8 bits - supports byte-level random access without block erase overhead |
| Read Access Time | 250 ns - enables direct interface with 4 MHz bus systems without wait states |
| Byte Write Cycle | 3.0 ms - autonomous internal timing eliminates need for external write pulse generation |
| VCC Supply Range | 2.7 V to 3.6 V - compatible with 3.3 V logic families and battery-backed systems |
| Active Current | 8 mA - allows sustained read/write operation within 3.3 V system power budgets |
| Standby Current | 50 µA - supports low-power sleep modes in portable or energy-sensitive designs |
| Endurance | 100,000 write/erase cycles - suitable for firmware patching or parameter logging with daily updates |
| Data Retention | 10 years at 85°C - validated for industrial deployments without periodic refresh |
Pinout & Package
AT28BV16-25PC is supplied in a 24-lead, 0.600" wide plastic DIP (PDIP) package per JEDEC MS-011 AA standard, with 0.300" lead spacing and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus supporting full 2K-word addressing; TTL/CMOS compatible |
| I/O0–I/O7 | Bidirectional Data Bus | True 8-bit parallel interface; supports DATA polling on I/O7 during write cycles |
| CE | Chip Enable | Active-low chip select; enables write when combined with OE high and WE low |
| OE | Output Enable | Active-low output control; disables outputs to prevent bus contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; falling edge initiates byte write with automatic internal timing |
| RDY/BUSY | Ready/Busy Output | Open-drain status signal (TSOP only); pulled low during write, released upon completion - not present on PDIP variant |
| GND / VCC | Power Terminals | Single 2.7–3.6 V supply; no separate VPP or programming voltage required |
| NC / DC | No Connect / Don't Connect | Unbonded pins; must remain unconnected per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| DATA Polling via I/O7 | Enables real-time write completion detection without dedicated status pins or timing delays |
| VCC-Sense Write Protection | Prevents inadvertent writes during brown-out or power ramp-up by disabling write function below 2.0 V |
| Internal Self-Timed Write | Eliminates need for external write pulse generators or microcontroller timing loops |
| JEDIC Byte-Wide Pinout | Ensures board-level compatibility with legacy SRAM and EPROM sockets in industrial control hardware |
| User-Accessible Device ID Space | 32-byte reserved area (7E0H–7FFH) for serialization, calibration data, or firmware version tracking |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Memory |
|---|---|
Use Scenario: Storing runtime-configurable I/O mapping and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile parallel memory providing immediate read access and infrequent field-updatable parameters via microprocessor bus. Use Value: 250 ns read speed ensures zero-wait-state integration with 8051 or Z80-based controllers; 10-year data retention guarantees integrity across equipment service life. | Use Scenario: Holding calibrated sensor offsets and safety-critical operational limits in portable diagnostic instruments requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant EEPROM storing FDA-compliant calibration records with write-protection against power faults. Use Value: VCC-sense and 5 ms power-on delay prevent corruption during battery swaps; 100,000-cycle endurance supports lifetime recalibration logs. |
| Automotive Body Control Module (BCM) | Legacy Test Equipment Firmware Patching |
Use Scenario: Retaining seat/mirror position presets and lighting profiles in automotive BCMs operating across -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Industrial-temperature EEPROM interfacing directly with 8-bit MCU buses without level-shifting or glue logic. Use Value: Specified operation at -40°C to +85°C and 50 µA standby current enable always-on memory in battery-constrained vehicle subsystems. | Use Scenario: Field-updating firmware patches and test algorithm revisions in aging semiconductor ATE platforms where flash replacement is cost-prohibitive. IC Role / Device Role / Timing Role: Drop-in SRAM-compatible nonvolatile memory enabling in-system reprogramming via existing JTAG or parallel bus infrastructure. Use Value: JEDEC pinout and 250 ns access allow direct socket replacement of obsolete 27C128 EPROMs without PCB redesign. |
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 VCC-sense protection; 450 ns access | Requires 5 V rail; unsuitable for 3.3 V or mixed-voltage systems; lower endurance (10,000 cycles) | Select only if legacy 5 V design mandates pin-compatible upgrade with no voltage change |
| MN6128B | 3.3 V–5.5 V dual-supply support; 200 ns access; 100,000-cycle endurance; no RDY/BUSY or DATA polling | Lacks hardware write-completion signaling; relies on fixed tWC timeout instead of polling | Prefer when faster access is critical and microcontroller can tolerate fixed 3 ms delay over polling efficiency |
Compared with AT28C16 and MN6128B, the AT28BV16-25PC uniquely combines 3.3 V compatibility, VCC-sense write protection, and dual write-completion signaling (DATA polling + RDY/BUSY), making it optimal for robust, low-voltage industrial upgrades where reliability under power fluctuation is mandatory.
Availability
AT28BV16-25PC is available at Aetrix Electronics and suitable for industrial control panels, medical calibration systems, automotive body modules, and legacy test equipment requiring stable component supply with long-term lifecycle assurance.
Supply support for AT28BV16-25PC 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT28BV16 product line was designed specifically for drop-in replacement of obsolete EPROMs and early EEPROMs in 8-bit microprocessor systems requiring low-voltage operation, deterministic write timing, and enhanced data integrity in harsh environments.
FAQ
What is the maximum operating temperature range for the AT28BV16-25PC?
The AT28BV16-25PC is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the "DC and AC Operating Range" table on page 4 of the official datasheet. This specification applies specifically to part numbers ending in 'PI' or 'TI', but the 'PC' suffix denotes the commercial-grade variant (0°C to +70°C). Since AT28BV16-25PC uses the 24P6 PDIP package and carries the 'C' suffix, its guaranteed operating range is 0°C to +70°C.
Does the AT28BV16-25PC support hardware write completion signaling via RDY/BUSY?
No - the RDY/BUSY pin is only available on TSOP (28T) and PLCC (32J) packages of the AT28BV16 family, as explicitly shown in the "Pin Configurations" diagrams on pages 1–2. The AT28BV16-25PC uses the 24P6 PDIP package, which omits the RDY/BUSY pin. Write completion must be detected exclusively via DATA polling on I/O7 for this variant.
Can the AT28BV16-25PC be used as a direct replacement for the AT27C128 EPROM?
Yes - the AT28BV16-25PC shares the JEDEC-standard 24-pin byte-wide pinout and identical address/data bus structure with the AT27C128, enabling socket-level replacement. However, unlike the UV-erasable AT27C128, the AT28BV16-25PC supports in-system electrical erasure and requires no programming voltage (VPP) or UV exposure, simplifying field updates.
What is the purpose of the 32-byte device identification area in the AT28BV16-25PC?
The AT28BV16-25PC includes 32 bytes of additional EEPROM space at addresses 7E0H–7FFH, accessible only when A9 is raised to 12 ± 0.5 V. This area is intended for user-defined data such as serial numbers, calibration coefficients, manufacturing date codes, or firmware version stamps - providing traceability without consuming main array memory.
How does write protection work on the AT28BV16-25PC during power-up sequences?
The AT28BV16-25PC implements three-tiered write protection: (1) VCC-sense disables writes below ~2.0 V; (2) a 5 ms internal timer prevents writes until VCC stabilizes post-power-on; and (3) hardware logic blocks writes unless CE is low, OE is high, and WE is low simultaneously. These features collectively prevent spurious writes during brown-out or reset conditions.
AT28BV16-25PC 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:
- 250 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
AT28BV16-25PC FAQ
1.How can I place an order for AT28BV16-25PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV16-25PC 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 AT28BV16-25PC reliable?
The price and inventory of AT28BV16-25PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV16-25PC is usually 5 days.
3.What payment methods are accepted for AT28BV16-25PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV16-25PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV16-25PC?
AT28BV16-25PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV16-25PC 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 AT28BV16-25PC?
For technical support, including AT28BV16-25PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV16-25PC requirements.
6.How does Aetrix verify that AT28BV16-25PC is sourced from the original manufacturer or authorized distributors?
All AT28BV16-25PC 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 AT28BV16-25PC meets industry standards.
7.What is the process for return or replacement of AT28BV16-25PC?
All AT28BV16-25PC units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV16-25PC, 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 AT28BV16-25PC part is unused and in its original packaging.
Return procedure for AT28BV16-25PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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