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Renesas HN58C256AT10E
- Part No.:
- HN58C256AT10E
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
HN58C256AT10E.pdf
- Description:
- 256K EEPROM (32KWORD X 8-BIT)
- Quantity:
- Payment:
- Shipping:
Inventory:105
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Product details
Overview
HN58C256AT10E from Renesas Electronics is a 256-kbit (32-kword × 8-bit) parallel EEPROM organized as 32,768 × 8-bit nonvolatile memory. It operates on a single 5 V ±10% supply, delivers 100 ns max access time, supports automatic byte and 64-byte page write (≤10 ms), and features on-chip address/data latches and JEDEC byte-wide standard compliance. It is used in industrial control systems for firmware storage and configuration retention.
For engineers reviewing the HN58C256AT10E datasheet, HN58C256AT10E pinout, HN58C256AT10E application, or HN58C256AT10E equivalent, key selection considerations include its TSOP-28 package, 100 ns read timing, software data protection (SDP), 10⁵ page-program endurance, and compatibility with legacy 8-bit microcontroller buses requiring byte- or page-level reprogrammability without power cycling.
Technical Context
The HN58C256AT10E implements MNOS floating-gate memory cells fabricated in CMOS process, enabling high reliability and low-power operation (20 mW/MHz active, 110 µW max standby). Its architecture includes integrated address/data latches, dual write control modes (WE- or CE-controlled), and hardware-level noise immunity for control pins (rejects <20 ns glitches).
It supports three write verification methods: data polling (I/O7 toggling), toggle bit detection (I/O6), and - unlike the HN58C257A series - does not include RDY/Busy or RES pins. Write operations are protected by software data protection (SDP) via 3-byte unlock sequence (5555h/AAh → 2AAAh/55h → 5555h/A0h) before programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 kbit (32,768 × 8-bit); provides sufficient space for boot code, calibration tables, or device configuration in resource-constrained embedded systems. |
| Access time | 100 ns max (tACC, tCE); ensures compatibility with 8-MHz Z80, 8051, or 68K-based controllers without wait-state insertion. |
| Write speed | ≤10 ms per byte or 64-byte page; enables rapid field updates of parameter sets or firmware patches during maintenance windows. |
| Endurance | 10⁵ erase/write cycles (page mode); supports >27 years of daily reprogramming in industrial logging applications. |
| Data retention | 10 years minimum at +70°C; guarantees long-term integrity of stored calibration or security keys without refresh. |
| Supply voltage | 4.5–5.5 V (5 V ±10%); matches standard TTL/CMOS logic rails and eliminates need for dedicated EEPROM regulators. |
| Operating temperature | 0 to +70°C; qualified for commercial-grade instrumentation, point-of-sale terminals, and office automation equipment. |
Pinout & Package
HN58C256AT10E uses a 28-pin plastic TSOP (Thin Small Outline Package) with JEITA code PTSA0028ZB-A (TFP-28DBV), lead-free compliant, 8.0 mm × 11.8 mm footprint, 0.55 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address input | 15-bit address bus; selects one of 32,768 bytes; A0–A5 for byte offset within page, A6–A14 for page address. |
| I/O0–I/O7 | Data input/output | Bi-directional 8-bit data bus; latched internally during write; supports true read-modify-write sequences. |
| CE | Chip enable | Active-low chip select; enables memory access only when asserted; used for memory-mapped decoding in 8-bit systems. |
| OE | Output enable | Active-low output gate; controls data bus drivers independently of CE to support multiplexed bus sharing. |
| WE | Write enable | Active-low write strobe; latches address and data on falling edge; supports both WE- and CE-controlled write protocols. |
| VCC | Power supply | +5 V supply pin; decoupling capacitor (0.1 µF) required within 10 mm for stable write/read operation. |
| VSS | Ground | Signal and power ground reference; must be connected to system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| 64-byte page write | Reduces firmware update time by 64× vs. byte writes; eliminates 63 separate command cycles for block programming. |
| Software data protection (SDP) | Prevents accidental writes via 3-byte unlock sequence; eliminates need for external write-protect hardware in cost-sensitive designs. |
| On-chip address/data latches | Removes requirement for external latch ICs in microcontroller interfaces; simplifies PCB layout and reduces BOM count. |
| JEDEC byte-wide standard compliance | Ensures drop-in compatibility with legacy 27C256, 28C256, and other industry-standard EPROM/EEPROM sockets and drivers. |
| Noise immunity on control pins | Rejects transients ≤20 ns on CE/OE/WE; prevents spurious writes during EMI events or power rail disturbances. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Retention |
|---|---|
|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed during controller boot and runtime parameter adjustment via RS-485 host. Use Value: Enables field-upgradable logic configurations without replacing hardware; 10⁵ endurance supports >100 firmware revisions over product lifetime. |
Use Scenario: Holding sensor calibration coefficients and user-prescribed therapy settings in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault accessed only during device initialization or clinician setup mode. Use Value: SDP lock prevents unauthorized modification; 10-year data retention meets FDA 21 CFR Part 11 requirements for electronic records. |
| Point-of-Sale Terminal Firmware Backup | Automotive Aftermarket ECU Parameter Tables |
|
Use Scenario: Maintaining bootloader images and localized language strings in retail POS terminals subject to frequent software updates. IC Role / Device Role / Timing Role: Secondary boot memory mapped alongside main Flash; loaded during cold start if primary image corruption is detected. Use Value: 100 ns access time allows direct execution from EEPROM in fail-safe recovery mode; page write accelerates OTA update deployment. |
Use Scenario: Storing fuel map corrections, transmission shift points, and emissions calibration offsets in aftermarket engine control units. IC Role / Device Role / Timing Role: Field-programmable lookup table storage accessible via CAN-connected tuning interface during vehicle service. Use Value: Lead-free TSOP-28 package withstands automotive reflow profiles; software protection prevents unintended map overwrites during diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PU | 150 ns access time; 5 V only (no ±10% tolerance); no page write; 10⁴ endurance (byte mode) | Lacks page programming and SDP; requires external hardware write protect for robust field updates | Choose for legacy designs where 150 ns timing is acceptable and page write is unnecessary. |
| MB85RC256V | FRAM technology; 70 ns access; unlimited endurance; 3 V operation; I²C interface (not parallel) | Serial interface requires protocol stack; incompatible with parallel bus microcontrollers without bridge logic | Choose only if migrating to I²C architecture and requiring infinite write cycles; not a pin- or function-compatible replacement. |
Compared with AT28C256-15PU and MB85RC256V, the HN58C256AT10E uniquely balances 100 ns parallel access, 64-byte page write efficiency, and software-controlled write protection - making it optimal for cost-sensitive, bus-tied embedded systems needing field-upgradable nonvolatile storage without architectural changes.
Availability
HN58C256AT10E is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, point-of-sale terminals, and automotive aftermarket ECUs requiring stable component supply across multi-year production cycles.
Supply support for HN58C256AT10E 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The HN58C256A series was designed as a drop-in EEPROM replacement for legacy 27C256/28C256 sockets, targeting cost-sensitive, high-reliability embedded systems requiring byte- and page-level reprogrammability with minimal board redesign.
FAQ
What is the maximum operating temperature range for the HN58C256AT10E?
The HN58C256AT10E is rated for operation from 0°C to +70°C, meeting commercial-grade environmental specifications. It is not qualified for extended industrial (−20°C to +85°C) or automotive temperature ranges. For designs requiring wider thermal margins, Renesas offers the HN58C256AP-10E (DIP) and HN58C256AFP-10E (SOP) industrial variants - but the HN58C256AT10E itself remains strictly 0°C to +70°C.
Does the HN58C256AT10E support Ready/Busy or RES functionality?
No, the HN58C256AT10E does not include RDY/Busy or RES pins. These features are exclusive to the HN58C257A series (e.g., HN58C257AT-10E). The HN58C256AT10E relies solely on data polling (I/O7) and toggle bit (I/O6) for write completion detection and uses software data protection (SDP) instead of hardware reset-based write inhibit.
What package type and lead-free status does the HN58C256AT10E use?
The HN58C256AT10E uses a 28-pin plastic TSOP package (JEITA code PTSA0028ZB-A, footprint TFP-28DBV) and is lead-free compliant, as indicated by the "E" suffix in the part number. Its dimensions are 8.0 mm × 11.8 mm with 0.55 mm pin pitch, and it adheres to RoHS Directive 2011/65/EU requirements.
How many write cycles can the HN58C256AT10E endure in page mode?
The HN58C256AT10E guarantees 10⁵ (100,000) erase/write cycles when operated in page mode, as specified in the datasheet's "Write/Erase Endurance" section. This endurance rating assumes proper voltage and timing compliance and applies specifically to 64-byte page writes - byte-mode endurance is lower at 10⁴ cycles.
Is the HN58C256AT10E compatible with standard 27C256 or 28C256 sockets?
Yes, the HN58C256AT10E is JEDEC byte-wide standard compliant and functionally compatible with 27C256 (UV-erasable EPROM) and 28C256 (EEPROM) pinouts and timing, though it requires no UV erasure and supports faster page writes. Its TSOP-28 package is not socket-compatible with DIP-28 sockets, but the electrical interface and command set are interoperable with existing 28C256 firmware drivers.
HN58C256AT10E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- -
- Memory Format:
- -
- Technology:
- -
- Memory Size:
- -
- Memory Organization:
- -
- Memory Interface:
- -
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HN58C256AT10E FAQ
1.How can I place an order for HN58C256AT10E through Aetrix?
Please submit a Request for Quotation (RFQ) for HN58C256AT10E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HN58C256AT10E reliable?
The price and inventory of HN58C256AT10E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HN58C256AT10E is usually 5 days.
3.What payment methods are accepted for HN58C256AT10E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HN58C256AT10E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HN58C256AT10E?
HN58C256AT10E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HN58C256AT10E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HN58C256AT10E?
For technical support, including HN58C256AT10E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HN58C256AT10E requirements.
6.How does Aetrix verify that HN58C256AT10E is sourced from the original manufacturer or authorized distributors?
All HN58C256AT10E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HN58C256AT10E meets industry standards.
7.What is the process for return or replacement of HN58C256AT10E?
All HN58C256AT10E units undergo pre-shipment inspection (PSI). If there is an issue with HN58C256AT10E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HN58C256AT10E part is unused and in its original packaging.
Return procedure for HN58C256AT10E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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