Microchip Technology AT28BV16-25PI

Overview

AT28BV16-25PI 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 packages - used in embedded system configuration storage and firmware parameter retention.

For engineers reviewing the AT28BV16-25PI datasheet, AT28BV16-25PI pinout, AT28BV16-25PI application, or AT28BV16-25PI equivalent, this page delivers verified electrical specs, package mapping, real-world use cases, and validated alternative parts for industrial-grade nonvolatile memory selection.

Technical Context

The AT28BV16-25PI operates as a drop-in parallel memory replacement for SRAM-based boot/config interfaces, requiring no external timing circuitry. Its internal self-timed write cycle (3 ms max), VCC-sense write protection, and DATA polling on I/O7 eliminate need for external wait-state generation or hardware handshaking.

It implements CMOS EEPROM technology with error correction for 100,000 write cycles and 10-year data retention. The RDY/BUSY open-drain output (TSOP only) and dual-line chip/output enable provide bus contention control in multi-peripheral systems.

Key Specifications

Pinout & Package

AT28BV16-25PI is supplied in a 24-lead, 0.600" wide plastic DIP (PDIP) package per JEDEC MS-011 AA standard, with through-hole mounting and 2.54 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar parallel EEPROM applications.

Compared with AT28C16 and M28W160ECB, the AT28BV16-25PI uniquely combines 3.3 V compatibility, true byte-write capability, self-timed programming, and industrial temperature support - making it optimal for embedded systems requiring reliable, low-power, field-updatable nonvolatile storage without architectural redesign.

Availability

AT28BV16-25PI is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, and automotive body control module settings requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AT28BV16-25PI 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 security ICs for industrial, automotive, and consumer applications.

The AT28BV16 product line delivers low-voltage, high-reliability parallel EEPROMs designed for direct microprocessor interface in mission-critical embedded systems requiring guaranteed data integrity and long-term retention.

FAQ

What is the operating voltage range for the AT28BV16-25PI?

The AT28BV16-25PI operates over a supply voltage range of 2.7 V to 3.6 V. This allows direct integration into 3.3 V logic systems and supports battery-backed operation down to 2.7 V. Operation outside this range - including 5 V - is not permitted and may cause functional failure or damage. The device includes VCC-sense circuitry that inhibits writes below ~2.0 V to prevent data corruption during power transitions.

Does the AT28BV16-25PI support DATA polling, and how is it implemented?

Yes, the AT28BV16-25PI supports DATA polling on I/O7 to detect write completion. During an active byte write, reading the addressed location returns the complement of the written data on I/O7 (other bits are indeterminate); once the internal 3 ms write cycle finishes, true data appears on all outputs. This eliminates need for external timing components or status pins - a key feature confirmed in the device's AC and DC specifications.

Is the RDY/BUSY pin available on the AT28BV16-25PI package?

No, the RDY/BUSY pin is not available on the AT28BV16-25PI. The AT28BV16-25PI uses a 24-lead PDIP package (package code "P"), and the RDY/BUSY function is only implemented in the TSOP (28T) variant. The PDIP version relies solely on DATA polling for write completion detection, as explicitly stated in the Pin Configurations section and confirmed by the ordering table showing PI = PDIP.

What is the maximum write endurance and data retention specification for the AT28BV16-25PI?

The AT28BV16-25PI guarantees 100,000 write/erase cycles and 10 years of data retention at +85°C. These values are measured and specified in the Absolute Maximum Ratings and DC Characteristics sections of the official datasheet. Endurance applies to each memory location independently, and retention is validated under worst-case thermal stress - critical for industrial deployments where field updates occur over decades.

Can the AT28BV16-25PI be used as a direct replacement for standard SRAM in existing designs?

Yes, the AT28BV16-25PI can replace SRAM in read operations due to identical access timing (250 ns) and pin-compatible JEDEC byte-wide interface. However, write behavior differs: writes require 3 ms internal timing and DATA polling or external delay - unlike SRAM's immediate write. Designs must implement polling or add wait-state logic; the AT28BV16-25PI does not emulate SRAM write timing but offers nonvolatility as the trade-off.