X28HC256PIZ-90 Equivalent & Substitute Parts

Part Overview

The X28HC256PIZ-90 is a 256Kbit parallel EEPROM manufactured by Renesas Electronics Corporation in a 28-DIP package with 90 ns access time. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement. The part operates across the industrial temperature range of -40°C to 85°C and complies with ROHS3 standards.

Substiute Parts

X28HC256PIZ-90

Renesas Electronics CorporationIn Stock: 1168X28HC256PIZ-90 Datasheet

Current PartRFQ

X28HC256JIZ-90

Renesas Electronics CorporationIn Stock: 1018X28HC256JIZ-90 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the X28HC256PIZ-90 is determined by equivalence in the following core parameters: memory capacity (256Kbit), memory organization (32K x 8), parallel interface architecture, access time (90 ns), write cycle time (5ms), supply voltage range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). The X28HC256JIZ-90 meets all electrical and functional specifications required for substitution. The primary distinction between these parts is packaging format: the main part uses 28-DIP through-hole mounting, while the substitute uses 32-PLCC surface-mount technology. This packaging difference necessitates PCB redesign and assembly process modification but does not affect electrical compatibility or functional performance.

Parameter Comparison

Engineering Selection Recommendations

The X28HC256JIZ-90 is a functionally equivalent substitute for the X28HC256PIZ-90 based on identical electrical specifications and performance characteristics. Both parts are ROHS3 compliant and manufactured by Renesas Electronics Corporation. The substitute part maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete main part. Selection of the X28HC256JIZ-90 requires accommodation of surface-mount assembly processes and PCB layout modifications due to the 32-PLCC package format versus the original 28-DIP through-hole configuration. Both parts satisfy identical functional requirements for 256Kbit parallel EEPROM applications operating within the specified voltage and temperature parameters.

Frequently Asked Questions (FAQ)

Q: Can the X28HC256JIZ-90 directly replace the X28HC256PIZ-90 without circuit modification?

A: Electrical substitution is direct; however, physical package differences require PCB redesign. The X28HC256PIZ-90 uses 28-DIP through-hole mounting while the X28HC256JIZ-90 uses 32-PLCC surface-mount packaging. Pin-to-pin functional equivalence exists, but footprint and assembly method changes are necessary.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is based on: 256Kbit memory capacity, 32K x 8 organization, parallel interface, 90 ns access time, 5ms write cycle time, 4.5V to 5.5V supply voltage, and -40°C to 85°C operating temperature range. Both parts meet these specifications identically.

Q: Why is the X28HC256PIZ-90 listed as obsolete?

A: The main part is classified as obsolete by the manufacturer. The X28HC256JIZ-90 maintains active status, providing a viable path for continued system support and component procurement.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 compliant. The X28HC256JIZ-90 carries REACH Unaffected status. Moisture sensitivity levels differ: the main part is MSL 1 (Unlimited), while the substitute is MSL 3 (168 Hours), requiring appropriate handling and storage protocols.

Q: What is the primary consideration when selecting between these parts?

A: The primary consideration is assembly capability. Through-hole assembly (28-DIP) versus surface-mount assembly (32-PLCC) determines feasibility. Electrical performance and functional characteristics are identical.