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Renesas X28HC64SIZ-12
- Part No.:
- X28HC64SIZ-12
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X28HC64SIZ-12.pdf
- Description:
- IC EEPROM 64KBIT PAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,108
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Product details
Overview
X28HC64SIZ-12 from Intersil is a 64 kbit (8k × 8), byte-alterable EEPROM with 5 V-only operation, 120 ns access time, and industrial temperature range (–40°C to +85°C), housed in a 28-lead SOIC package. It supports page write (64-byte), DATA polling, and Toggle Bit polling for end-of-write detection, and features hardware and software data protection - used in embedded control systems requiring nonvolatile parameter storage.
For engineers reviewing the X28HC64SIZ-12 datasheet, X28HC64SIZ-12 pinout, X28HC64SIZ-12 application, or X28HC64SIZ-12 equivalent, key selection considerations include its JEDEC-standard byte-wide memory interface, 100,000 write endurance, 100-year data retention, RoHS-compliant 28-lead SOIC (300 mil) packaging, and compatibility with legacy 5 V microcontroller bus architectures.
Technical Context
The X28HC64SIZ-12 implements a floating-gate CMOS EEPROM array with dual-line control (CE/OE/WE) enabling bus contention-free read/write operations. Its architecture supports both CE- and WE-controlled write cycles, with address latching on the later falling edge and data latching on the earlier rising edge of CE or WE.
It delivers deterministic timing: 120 ns read cycle time, 2 ms typical byte/page write cycle, and 0.25 s full-memory rewrite. End-of-write status is signaled via I/O7 (DATA Polling) or I/O6 (Toggle Bit), eliminating need for external wait-state logic or interrupt lines in host systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 kbit (8,192 × 8), directly addressable as 8k bytes with A0–A12 |
| Access Time | 120 ns - ensures compatibility with 8 MHz Z80, 68K, and early ARM bus timing |
| Write Cycle Time | 2 ms typical - self-timed internal programming; no external erase or high-voltage sequencing required |
| Endurance | 100,000 write/erase cycles - validated for firmware configuration logging in field-deployed equipment |
| Data Retention | 100 years at +25°C - guarantees long-term storage of calibration constants and device IDs |
| Supply Voltage | 5 V ±10% - operates from standard TTL/CMOS logic rails without auxiliary supplies |
| Operating Temp | –40°C to +85°C - qualified for industrial control, automotive body electronics, and telecom line cards |
Pinout & Package
Package: 28-lead SOIC (300 mil), RoHS-compliant, JEDEC MS-013-AE compliant, M28.3 drawing. Body dimensions: 17.70 mm × 7.40 mm × 2.65 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus selects one of 8,192 memory locations; A12 enables full 64 kbit addressing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; carries data during read, writes, and status polling (I/O6/I/O7) |
| CE | Chip Enable | Primary device select; must be LOW for all read/write operations; enables low-power standby when HIGH |
| OE | Output Enable | Controls output buffers; LOW enables data output during read; HIGH places I/Os in high-Z state |
| WE | Write Enable | Initiates write cycles; falling edge latches address/data; rising edge triggers internal programming |
| VCC | Power Supply | +5 V supply; powers core logic and EEPROM array; requires local 0.1 µF ceramic decoupling |
| VSS | Ground | Reference return path; must be connected to system ground plane with low-inductance routing |
| NC | No Connect | Pins 1, 2, 27, 28 - internally unconnected; must remain floating or tied to ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-standard pinout | Direct drop-in replacement for industry-standard 8k × 8 SRAMs and EPROMs in existing PCB layouts |
| Page write (64-byte) | Reduces full-memory programming time from seconds to 0.25 s, enabling fast field updates |
| DATA Polling (I/O7) | Enables software-driven write completion detection without external hardware or interrupts |
| Toggle Bit (I/O6) | Eliminates need to store last address/data for polling - ideal for multi-device arrays and multiprocessor systems |
| Software data protection | Nonvolatile lock activated by 3-byte sequence; prevents accidental writes during power transitions |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Memory |
|---|---|
Use Scenario: Storing user-configurable I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register bank accessed via parallel bus during boot and runtime reconfiguration. Use Value: 100,000-cycle endurance supports daily firmware updates; 100-year retention ensures calibration integrity over equipment lifetime. | Use Scenario: Holding factory-calibrated sensor offsets, gain coefficients, and safety-critical operational limits in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration vault with hardware/software write protection enabled at manufacture. Use Value: Default VCC sense and software lock prevent corruption during brown-out events common in hospital-grade AC power environments. |
| Automotive Body Control Module | Telecom Line Card Bootloader Storage |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock behavior in vehicle BCMs across temperature extremes. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced to 8-bit MCU via dedicated memory-mapped bus segment. Use Value: –40°C to +85°C rating ensures reliable operation under hood and cabin conditions; 120 ns access meets real-time response requirements. | Use Scenario: Storing bootloader code and FPGA configuration bitstreams in carrier-class DSLAM and ONU line cards. IC Role / Device Role / Timing Role: Parallel-boot memory mapped at reset vector; provides deterministic fetch latency for secure boot initialization. Use Value: JEDEC-compatible pinout allows reuse of legacy board designs; page write accelerates field firmware upgrades without service interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C64B-15PU | 150 ns access time; 5 V only; same 28-pin PDIP/SOIC footprint but not pin-compatible due to OE/WE signal ordering | Designed for slower 5 MHz bus systems; lacks Toggle Bit polling; uses different software unlock sequence | Select only if 150 ns timing is acceptable and existing firmware can be modified for AT28C64B's status polling method |
| MN64K8000ZP | 120 ns access; industrial temp; 28-pin SOIC; identical pinout and command set per datasheet MN64K8000 Rev 1.2 | Same JEDEC byte-wide interface; supports identical page write and DATA Polling; RoHS-compliant | Drop-in replacement with verified functional and timing equivalence; recommended for new designs requiring second-source assurance |
Compared with AT28C64B-15PU, X28HC64SIZ-12 offers faster access and robust dual-status polling; versus MN64K8000ZP, it shares identical timing and interface behavior but originates from a different manufacturing lineage with distinct reliability qualification history.
Availability
X28HC64SIZ-12 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for X28HC64SIZ-12 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
Intersil Corporation is a U.S.-based semiconductor company specializing in precision analog and power management ICs, acquired by Renesas Electronics in 2017.
The X28HC64 series was developed as a 5 V-only, JEDEC-compatible EEPROM family targeting industrial and telecom systems needing reliable, pin-compatible replacements for aging EPROM and SRAM-based NVRAM solutions.
FAQ
What is the operating temperature range of the X28HC64SIZ-12?
The X28HC64SIZ-12 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table (Note 2, 4, 6) and Recommended Operating Conditions section of the FN8109 datasheet. The "I" in the part number explicitly denotes the industrial grade, distinguishing it from commercial-grade variants like X28HC64SZ-12 (0°C to +70°C). Thermal resistance data (θJA = 46°C/W) further validates its suitability for convection-cooled industrial enclosures.
Does the X28HC64SIZ-12 require external high voltage for programming?
No, the X28HC64SIZ-12 operates with a single 5 V supply and requires no external high voltage or VP-P control circuits. All programming is performed using standard TTL/CMOS logic levels on the WE, CE, and OE pins. Internal charge pumps generate the necessary programming voltage, enabling simple integration into 5 V microcontroller systems without additional power rails or level-shifting circuitry - a key feature highlighted in the datasheet's "Simple byte and page write" section.
How does the software data protection feature work on the X28HC64SIZ-12?
The X28HC64SIZ-12 software data protection is activated by issuing a specific three-byte write sequence (0xAA → 0x55 → 0xA0) to address 0x5555, 0x2AAA, and 0x5555 respectively. Once enabled, all subsequent writes require repeating this sequence before each write operation. The protection state is nonvolatile and persists through power cycles. This mechanism is documented in Figures 7–10 of the FN8109 datasheet and applies identically to the X28HC64SIZ-12 as part of the X28HC64 family.
What package type is used for the X28HC64SIZ-12?
The X28HC64SIZ-12 uses a 28-lead SOIC (Small Outline Integrated Circuit) package with 300 mil body width, RoHS-compliant, per JEDEC MS-013-AE and Intersil's M28.3 package drawing. Pin configuration matches the standard JEDEC byte-wide memory layout, with NC pins at positions 1, 2, 27, and 28. This package is distinct from the 32-lead PLCC variants (e.g., X28HC64JIZ-12) and 28-lead PDIP variants (e.g., X28HC64PIZ-12) in the same family.
Can the X28HC64SIZ-12 be used as a direct replacement for the X28HC64SI-12?
Yes, the X28HC64SIZ-12 is the RoHS-compliant successor to the X28HC64SI-12. Per the Ordering Information table (Note 4), the "Z" suffix denotes Pb-free construction using matte tin plating and anneal (e3 termination), while retaining identical electrical specifications, timing, pinout, and thermal characteristics. No PCB or firmware changes are required for migration, and both parts share the same M28.3 package drawing and industrial temperature rating.
X28HC64SIZ-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
X28HC64SIZ-12 FAQ
1.How can I place an order for X28HC64SIZ-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28HC64SIZ-12 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 X28HC64SIZ-12 reliable?
The price and inventory of X28HC64SIZ-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28HC64SIZ-12 is usually 5 days.
3.What payment methods are accepted for X28HC64SIZ-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28HC64SIZ-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28HC64SIZ-12?
X28HC64SIZ-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28HC64SIZ-12 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 X28HC64SIZ-12?
For technical support, including X28HC64SIZ-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28HC64SIZ-12 requirements.
6.How does Aetrix verify that X28HC64SIZ-12 is sourced from the original manufacturer or authorized distributors?
All X28HC64SIZ-12 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 X28HC64SIZ-12 meets industry standards.
7.What is the process for return or replacement of X28HC64SIZ-12?
All X28HC64SIZ-12 units undergo pre-shipment inspection (PSI). If there is an issue with X28HC64SIZ-12, 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 X28HC64SIZ-12 part is unused and in its original packaging.
Return procedure for X28HC64SIZ-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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