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Renesas Electronics X28HC256FI-90 — Memory (DRAM / SRAM / Flash / EEPROM)
Renesas Electronics

Unisem X28HC256FI-90 256Kbit Parallel EEPROM, 90 ns

MPNX28HC256FI-90
End of Life

Unisem X28HC256FI-90, 256Kbit parallel EEPROM (32K x 8), 90 ns access time, 4.5 V supply, 5 ms write cycle, surface-mount 28-pin flat package, -40°C to 85°C.

$123.31Ref. price · indicative, final on quote
X28HC256FI-90 datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
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Specifications

X28HC256FI-90 Technical Specifications
ParameterValue
Interface_typeParallel
Mounting_typeSurface Mount
Operating temperature high-40°C to 85°C(TA)
Frame_size256Kbit
Access time90 ns
Memory_typeNon-Volatile
Package_typeBulk
Memory formatEEPROM
Supply_voltage_v4.5
Memory organization32K x 8
Write cycle time - word, page5ms

Product details

Parallel EEPROM for 5 V legacy buses

The Unisem X28HC256FI-90 is a 256 Kbit parallel EEPROM organized as 32K x 8, with a 90 ns access time and a 4.5 V nominal supply. It uses a standard parallel interface for direct connection to 8-bit microcontroller and DSP memory buses, and comes in a surface-mount 28-pin flat package. Typical applications include industrial controllers, embedded systems, and legacy telecom equipment that require non-volatile parameter storage with byte-level rewritability.

Industrial temperature range — environment fit

Rated for -40°C to 85°C, this EEPROM is suited for control cabinets, factory floors, and outdoor enclosures where the ambient temperature stays within that band. It is not specified for extended automotive under-hood or downhole drilling environments — those would need a wider-range part like the X28C513EMB-25, which covers -55°C to 125°C.

Frequently asked questions

How do I get current pricing and availability for X28HC256FI-90?

Pricing and availability for the X28HC256FI-90 are confirmed at quote time against an RFQ through independent distribution. Submit an RFQ to receive current pricing and stock status.

When sourcing X28HC256FI-90, what is the closest functional alternative — X28C513EMB-25?

The X28C513EMB-25 is a 512 Kbit parallel EEPROM with 150 ns access time and a -55°C to 125°C range. It is a higher-density, wider-temperature alternative but runs slower and has a different pinout — verify footprint compatibility before substitution.

What is the memory organization of X28HC256FI-90?

The X28HC256FI-90 is organized as 32K x 8 bits (256 Kbit total), with a parallel interface and a 90 ns access time.