Mfr Part #:

HN58C257AT-10

Mfr Name: Hitachi

The Hitachi HN58C257AT-10 is a 256k EEPROM organized as 32768 words by 8 bits. It offers access times of 85 ns or 100 ns and operates from a single 5V supply.

✓ Total Stock: 242 pcs

$ Price Range: $1.28

HN58C257AT-10 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
PROSOFT ELECTRONICS ✓ Non-Authorised Inventory information	242 pcs On Request	242 pcs	On Request	1	On Request	On Request	9735TP/	On Request	On Request

HN58C257AT-10 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Hitachi
Lead Style	Gull Wing
Memory Type	EEPROM
Mounting Type	Surface Mount
Operating Temperature	-20 to 85°C
Storage Temperature	-55°C ~ 125°C
Supply Voltage	5 V

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HN58C257AT-10 Description

Short technical summary and product information.

The Hitachi HN58C257AT-10 is a high-speed, low-power, and reliable 256 kilobit electrically erasable and programmable read-only memory (EEPROM). It is organized as 32768 words by 8 bits, providing a storage capacity of 256k bits. This EEPROM utilizes advanced MNOS memory technology and CMOS circuitry for enhanced performance.

Key features include a single 5V ±10% supply voltage and selectable access times of 85 ns or 100 ns. The device supports a 64-byte page programming function for faster write operations, with automatic byte write and automatic page write times of 10 ms maximum. Power dissipation is low, with active power consumption of 20 mW/MHz (typical) and standby power of 110 µW (maximum).

The HN58C257AT-10 series is available in a 32-pin plastic TSOP package, suitable for surface mount applications. It also features on-chip latches for address, data, CE, OE, and WE signals, along with data protection circuits for power on/off conditions. The device conforms to the JEDEC byte-wide standard and offers 10^5 erase/write cycles and 10 years of data retention. Industrial temperature range versions are available, operating from -20°C to 85°C or -40°C to 85°C.

HN58C257AT-10 Quick Information

Product Type: EEPROM

Series: HN58C256A/HN58C257A Series

Canonical Name: Hitachi HN58C257AT-10 256k EEPROM

Subcategory: Serial EEPROM

HN58C257AT-10 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

Lead Free: Lead Free

HN58C257AT-10 Estimated Pricing

Qty	Low	High
1+	$1.28	$1.28

Estimated market price range - modelled values for guidance only, not live distributor offers.

HN58C257AT-10 Features

256k EEPROM organized as 32768 words x 8 bits.
Access times of 85 ns and 100 ns available.
Single 5V supply voltage operation.
64-byte page programming for faster writes.
Available in a 32-pin TSOP package.

HN58C257AT-10 Applications

Suitable for data storage applications.
Used in embedded systems requiring non-volatile memory.
Ideal for applications needing fast write operations.
Designed for reliable data retention.

HN58C257AT-10 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the memory organization of the HN58C257AT-10?

The HN58C257AT-10 is organized as 32768 words by 8 bits.

What are the available access times for the HN58C257AT-10?

The available access times are 85 ns and 100 ns.

What is the operating supply voltage for this EEPROM?

The HN58C257AT-10 operates from a single 5V supply.

Does the HN58C257AT-10 support page programming?

Yes, it features a 64-byte page programming function.

What is the package type for the HN58C257AT-10?

The HN58C257AT-10 is available in a 32-pin plastic TSOP package.

What is the operating temperature range for industrial versions?

Industrial versions are available for temperature ranges of -20°C to 85°C and -40°C to 85°C.

What is the RoHS status of the HN58C257AT-10?

The RoHS status is RoHS3 Compliant.