MICROCHIP AT28C64(E)-25JI

Mfr. Part

AT28C64(E)-25JI

Manufacturer

Micrel / Microchip Technology

Y-IC is a quality authorized distributor of Micrel / Microchip Technology. We supply genuine parts and deliver the best products and services to every customer.

Detailed Description

64 Kbit (8K x 8) parallel EEPROM, 5V-only operation, fast read access, byte and page write modes, software data protection. Industrial temperature grade. Suffix “J” indicates PLCC package; “I” indicates -40°C to +85°C operation. Category: Integrated Circuits (ICs), Small Classification: Specialized ICs (non-volatile memory).

Quantity in stock: 1460

Date Code: 1842 (Year 2018, Week 42)

Package/Case code reference: 19390

Key Features

8K x 8 organization (64 Kbit total)

5V-only read and write (no special programming voltage)

Typical access time class: 250 ns for -25 speed grade

Byte write and page write support for faster programming

Software Data Protection (SDP) and hardware-controlled write with WE, CE, OE

TTL/CMOS compatible inputs and outputs

Industrial temperature range: -40°C to +85°C

JEDEC-standard pinout for 28-pin PLCC variants

High endurance (typical 100k write cycles) and long data retention

Low-power standby, robust non-volatile storage

Key Advantages

Simple, direct parallel interface (no serial protocol needed)

Drop-in replacement for many legacy 28C64 EEPROMs

Reliable non-volatile storage without batteries

Easy in-system programming at 5V

Stable data over time and temperature

Widely used and supported, easing maintenance of legacy designs

Packaging

Type: PLCC-28 (J-leaded), per “-JI” suffix; Package/Case code provided: 19390

Material: Molded plastic PLCC body with J-leads

Approximate size: compact 28-lead PLCC footprint; confirm exact dimensions in datasheet for PCB land pattern

Pin configuration (28 pins): Address A0–A12, Data I/O D0–D7, Chip Enable (CE), Output Enable (OE), Write Enable (WE), VCC, GND

Thermal characteristics: Plastic PLCC with moderate thermal resistance; designed for -40°C to +85°C ambient; ensure adequate airflow for heavy write duty cycles

Electrical properties (typical for this family and speed grade): 5V supply (approx. 4.5V–5.5V), read access around 250 ns, byte write time on the order of milliseconds, low standby current; refer to datasheet for exact limits and timing

Lifecycle

Status: Generally active/mature within Microchip’s EEPROM portfolio. Not indicated as near discontinuation based on current family status. Availability can vary; check with us for up-to-date supply.

Equivalent or alternative models:

- Microchip/Atmel AT28C64E-12JI (same family, faster access, same PLCC package, industrial grade)

- Microchip/Atmel AT28C64E-25PI (DIP-28 package, industrial grade)

- Microchip/Atmel AT28C64E-25SI or -25SU (SOIC/TSOP variants; verify exact suffix/package)

- Microchip/Atmel AT28C64B series (earlier revision; verify timing and SDP behavior)

- ON Semiconductor/Catalyst CAT28C64 series (cross family; check pinout, timing, and protections)

- Renesas/Intersil X28C64 series (cross family; verify compatibility and timings)

- Other 28C64-compatible EEPROMs from legacy vendors (National NMC28C64, etc.; confirm details)

Important: Always verify pinout, access time, write algorithms, protection features, and temperature range before substituting. If you need help selecting a direct equivalent, contact our sales team via the Y-IC website for expert guidance.

Key Application Areas

Industrial controls and PLC parameter storage

Legacy embedded systems needing parallel EEPROM

Calibration and configuration data storage

Telecom and networking equipment maintenance

Instrumentation, test equipment, and measurement devices

Medical diagnostics and lab equipment (non-life-support) configuration memory

Robotics and automotive aftermarket modules for settings retention

Education and prototyping with classic 8-bit microprocessors

Datasheet

Y-IC provides the most authoritative datasheet for this product model on our website. For accurate electrical limits, timing, pin maps, and mechanical drawings, download the datasheet on this page now.

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