My Inquiry
My Account
Microchip Technology AT28BV16-25JI
- Part No.:
- AT28BV16-25JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT28BV16-25JI.pdf
- Description:
- IC EEPROM 16KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT28BV16-25JI from Atmel is a 16 Kbit (2,048 × 8) parallel EEPROM with JEDEC-standard byte-wide pinout, 2.7–3.6 V operation, 250 ns read access time, and industrial temperature range (−40°C to +85°C). It supports direct microprocessor control via CE/OE/WE, DATA polling, and RDY/BUSY signaling in TSOP package - used in embedded system configuration storage and firmware parameter retention.
For engineers reviewing the AT28BV16-25JI datasheet, AT28BV16-25JI pinout, AT28BV16-25JI application, or AT28BV16-25JI equivalent, key selection considerations include its 3 ms byte-write cycle, 50 µA CMOS standby current, VCC-sense write protection, and compatibility with 8-bit bus interfaces in space-constrained industrial controllers.
Technical Context
The AT28BV16-25JI operates as a drop-in parallel memory replacement for SRAM-based boot/config storage, requiring no external timing circuitry. Its internal self-timed write cycle eliminates need for external write pulse generation, and DATA polling on I/O7 enables software-driven write completion detection without dedicated status pins beyond RDY/BUSY.
It implements VCC-sense and 5 ms power-on delay write inhibition to prevent inadvertent writes during power ramp-up. The device includes 32 bytes of user-accessible identification EEPROM at addresses 7E0H–7FFH, accessible via A9 = 12 ± 0.5 V - a feature distinct from standard array access and not shared by most competing EEPROMs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 words × 8 bits) - fits small boot code, calibration tables, or device ID storage in resource-limited systems. |
| Read Access Time | 250 ns - supports direct attachment to 8-bit microcontrollers running at ≤4 MHz without wait states. |
| Byte Write Cycle | 3.0 ms - deterministic internal timing enables predictable firmware update latency without external timers. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic families and battery-backed industrial rails. |
| Standby Current | 50 µA - enables low-power retention in always-on monitoring nodes with multi-year battery life. |
| Endurance | 100,000 write cycles - sufficient for field-updatable configuration registers updated weekly over 20+ years. |
| Data Retention | 10 years at +85°C - validated for long-term reliability in industrial enclosures without active cooling. |
Pinout & Package
AT28BV16-25JI is supplied in a 32-lead plastic J-leaded chip carrier (PLCC) package per JEDEC MS-016 AE, with 1.27 mm pitch and surface-mount compatibility. Pin 1 marked by corner notch; body size 13.7 mm × 11.9 mm × 3.56 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus supporting full 2K-word addressing; TTL/CMOS-compatible thresholds (VIL ≤ 0.6 V, VIH ≥ 2.0 V). |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; outputs drive 1 mA load (VOL ≤ 0.3 V); supports DATA polling on I/O7 during write. |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high-Z output when CE high, preventing bus contention. |
| OE | Output Enable | Active-low output control; used with CE to gate data reads; required high during write cycles. |
| WE | Write Enable | Active-low write strobe; falling edge latches address, rising edge latches data; write inhibited if OE low or CE high. |
| RDY/BUSY | Status Output | Open-drain signal (TSOP only); not present on PLCC variant - AT28BV16-25JI uses DATA polling instead. |
| VCC, GND | Power Supply | Single 2.7–3.6 V supply; decoupling capacitor recommended within 10 mm of VCC/GND pins. |
| NC, DC | No Connect / Don't Connect | Unbonded or unused pins; must remain unconnected per design - floating NC pins may cause EMI or latch-up. |
Key Features
| Feature | Design Value |
|---|---|
| DATA Polling on I/O7 | Enables real-time write completion detection in software without hardware interrupts or additional GPIO lines. |
| VCC-Sense Write Inhibit | Blocks writes automatically when supply drops below ~2.0 V - prevents corruption during brown-out or battery sag. |
| Internal 5 ms Power-On Delay | Guarantees stable VCC before enabling write logic - eliminates need for external POR circuitry in cost-sensitive designs. |
| User-Accessible ID Memory | 32-byte dedicated EEPROM block (7E0H–7FFH) for serialization, calibration data, or firmware version tracking. |
| JEDEC Byte-Wide Pinout | Ensures PCB layout compatibility with legacy 27C256, 28C256, and other 2K×8 parallel memories - simplifies redesigns. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Retention |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via 8-bit microcontroller bus during power-up and runtime reconfiguration. Use Value: 10-year data retention at +85°C ensures calibration integrity across maintenance cycles without periodic refresh. | Use Scenario: Holding sensor offset/gain coefficients and patient-specific therapy parameters in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store isolated from main application flash - updated only during service mode. Use Value: VCC-sense write protection prevents accidental overwrite during battery swaps or low-voltage conditions common in mobile medical use. |
| Telecom Line Card Bootloader Parameters | Automotive Body Control Module Settings |
Use Scenario: Storing MAC addresses, port assignments, and firmware patch flags on carrier-grade Ethernet line cards operating in NEBS-compliant chassis. IC Role / Device Role / Timing Role: Parallel-configured boot-time configuration memory interfaced directly to MIPS or ARM-based baseband processors. Use Value: 250 ns read access enables zero-wait-state initialization sequences critical for sub-second system boot requirements. | Use Scenario: Retaining seat/mirror position presets, lighting profiles, and CAN node configuration in automotive BCMs exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Industrial-temperature EEPROM integrated into 8-bit MCU subsystem for nonvolatile user preference storage. Use Value: −40°C to +85°C operation and 100,000-cycle endurance support repeated personalization updates over vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PI | 32 Kbit (4K × 8), 150 ns access, 5 V only (4.5–5.5 V), no VCC-sense write inhibit | Requires 5 V rail; lacks low-voltage write protection; suitable for legacy 5 V systems only | Select only if 5 V supply and faster access are mandatory; not drop-in due to voltage and timing mismatch. |
| ST M28W640ECB90N6E | 64 Mbit Flash, 90 ns access, 3.0–3.6 V, sector erase, no byte-write capability | Block-erase architecture requires full-sector management; incompatible with byte-level firmware patching | Choose for high-density code storage; avoid where individual parameter updates are required. |
Compared with AT28C256-15PI and ST M28W640ECB90N6E, the AT28BV16-25JI provides guaranteed byte-write reliability at 3.3 V with built-in brown-out protection - making it uniquely suited for incremental configuration updates in modern low-voltage industrial controllers.
Availability
AT28BV16-25JI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, telecom line cards, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT28BV16-25JI 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 delivers low-voltage, high-reliability parallel EEPROMs optimized for embedded systems needing robust, byte-addressable nonvolatile storage without complex firmware drivers.
FAQ
What is the maximum operating temperature range for the AT28BV16-25JI?
The AT28BV16-25JI is rated for industrial temperature operation from −40°C to +85°C. This specification is validated per the manufacturer's AC and DC operating ranges table and applies across all electrical parameters including read access time, write cycle duration, and standby current. The AT28BV16-25JI maintains full functionality within this range without derating.
Does the AT28BV16-25JI support RDY/BUSY signaling?
No, the AT28BV16-25JI does not support RDY/BUSY signaling. That feature is exclusive to the TSOP package variant (e.g., AT28BV16-25TC). The AT28BV16-25JI uses the PLCC package, which relies solely on DATA polling via I/O7 to detect write completion - a method fully supported and characterized in the device's AC timing specifications.
How is write protection implemented in the AT28BV16-25JI?
The AT28BV16-25JI implements three-tier write protection: (1) VCC-sense inhibition below ~2.0 V, (2) automatic 5 ms power-on delay before write enable, and (3) hardware-level inhibition when OE is low, CE is high, or WE is high. These mechanisms operate independently and concurrently - all must be satisfied for a write to proceed. This design prevents corruption during brown-out, reset, or bus contention events.
Can the AT28BV16-25JI be used as a direct replacement for the AT28C256 in existing designs?
No, the AT28BV16-25JI is not a direct replacement for the AT28C256 due to fundamental differences: it operates at 2.7–3.6 V (vs. 4.5–5.5 V), has half the density (16 Kbit vs. 32 Kbit), and uses different timing (tWC = 3 ms vs. 10 ms). While pinout is JEDEC-compatible, voltage mismatch and reduced capacity require schematic and firmware validation before substitution.
What is the purpose of the 32-byte ID memory in the AT28BV16-25JI?
The AT28BV16-25JI includes 32 bytes of dedicated EEPROM at addresses 7E0H–7FFH, accessible only when A9 is raised to 12 ± 0.5 V. This area is intended for permanent device identification, manufacturing traceability, or calibration data that must survive full memory erasure - separate from the main array and protected by distinct voltage-level access control.
AT28BV16-25JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT28BV16-25JI FAQ
1.How can I place an order for AT28BV16-25JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28BV16-25JI 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 AT28BV16-25JI reliable?
The price and inventory of AT28BV16-25JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28BV16-25JI is usually 5 days.
3.What payment methods are accepted for AT28BV16-25JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28BV16-25JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28BV16-25JI?
AT28BV16-25JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28BV16-25JI 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 AT28BV16-25JI?
For technical support, including AT28BV16-25JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28BV16-25JI requirements.
6.How does Aetrix verify that AT28BV16-25JI is sourced from the original manufacturer or authorized distributors?
All AT28BV16-25JI 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 AT28BV16-25JI meets industry standards.
7.What is the process for return or replacement of AT28BV16-25JI?
All AT28BV16-25JI units undergo pre-shipment inspection (PSI). If there is an issue with AT28BV16-25JI, 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 AT28BV16-25JI part is unused and in its original packaging.
Return procedure for AT28BV16-25JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT28BV16-25JI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
