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Renesas X28HC64PZ-12
- Part No.:
- X28HC64PZ-12
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
X28HC64PZ-12.pdf
- Description:
- IC EEPROM 64KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,811
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Product details
Overview
X28HC64PZ-12 from Intersil is a 64 kbit (8k × 8), 5V-only, byte-alterable EEPROM in 28-pin PDIP package, featuring 120 ns access time, 2 ms typical byte/page write cycle, and JEDEC-standard pinout compatible with industry RAMs. It supports DATA polling and Toggle Bit status detection, software data protection, and delivers 100,000 write cycles with >100-year data retention for nonvolatile configuration storage in industrial control systems.
For engineers reviewing the X28HC64PZ-12 datasheet, X28HC64PZ-12 pinout, X28HC64PZ-12 application, or X28HC64PZ-12 equivalent, key selection considerations include its 5V-only operation, 28-pin PDIP RoHS-compliant packaging, 120 ns read timing, page-write capability (64-byte burst), and hardware/software write protection architecture.
Technical Context
The X28HC64PZ-12 implements a floating-gate CMOS EEPROM array with dual-line control logic (CE/OE/WE) enabling bus contention-free reads and CE- or WE-triggered writes. Its internal timing engine self-times write operations without external high-voltage circuitry or erase-before-write sequences.
It integrates two end-of-write detection mechanisms-DATA Polling on I/O7 (complement-read behavior) and Toggle Bit on I/O6-with no requirement for interrupt lines or external status hardware. The device operates exclusively from a single 5V ±10% supply and retains data without power for over a century.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 kbit (8,192 × 8-bit words), sufficient for firmware parameter tables or calibration data storage |
| Access time | 120 ns maximum - meets timing budgets for 8-bit microcontroller bus interfaces at ≤8 MHz |
| Write cycle time | 2 ms typical per byte or page - enables full memory rewrite in ~0.25 s using 64-byte page mode |
| Endurance | 100,000 write/erase cycles - supports field-updatable systems requiring frequent reconfiguration |
| Data retention | Greater than 100 years at +25°C - ensures long-term reliability in unattended embedded deployments |
| Supply voltage | 5 V ±10% only - eliminates need for charge pumps or multi-rail power design |
| Operating temperature | 0°C to +70°C - validated for commercial-grade industrial control and instrumentation environments |
| Package | 28-pin PDIP (E28.6), through-hole wave-solder compatible, RoHS-compliant matte tin finish |
Pinout & Package
28-pin plastic dual in-line package (PDIP), body width 0.600 inch (15.24 mm), RoHS-compliant matte tin plating (e3 finish), rated for wave solder only (not reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address inputs | 13-bit address bus selecting one of 8,192 memory locations; A12 is MSB |
| I/O0–I/O7 | Bi-directional data bus | 8-bit parallel interface for read/write; I/O6 = Toggle Bit, I/O7 = DATA Polling indicator |
| CE | Chip Enable | Primary device select; must be LOW for all operations; enables low-power standby when HIGH |
| OE | Output Enable | Controls output buffers during read; HIGH disables outputs (high-Z); used with CE for bus isolation |
| WE | Write Enable | Triggers write latching; falling edge (with CE LOW) initiates byte/page programming |
| VCC | Power supply | +5 V ±10% supply; powers core logic and EEPROM array; no auxiliary voltages required |
| VSS | Ground | Reference return path for all signals and power; decoupling capacitor required per device |
| NC | No connect | Pins 1, 2, 27, 28 - physically present but internally unconnected; must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-standard pinout | Direct drop-in replacement for 8k×8 SRAMs in legacy designs without PCB changes |
| Page write (64-byte) | Reduces total programming time by >95% vs. sequential byte writes; supports burst configuration updates |
| DATA Polling (I/O7) | Enables host CPU to poll completion without interrupts or timers - simplifies firmware implementation |
| Toggle Bit (I/O6) | Eliminates need to store last address/data for status checking - ideal for multi-device arrays |
| Software data protection | Nonvolatile lock activated via 3-byte command sequence - prevents accidental writes after power cycling |
| Hardware write inhibit | Automatic protection during power-up/down via VCC sense and signal-level monitoring (CE/OE/WE) |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing user-configurable I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed during boot and runtime via 8-bit parallel bus. Use Value: Enables field reprogramming without battery-backed SRAM; 100,000-cycle endurance supports decades of maintenance cycles. | Use Scenario: Retaining factory-calibrated sensor offsets and gain coefficients in portable diagnostic equipment. IC Role / Device Role / Timing Role: Read-once-at-boot, write-rarely EEPROM holding precision calibration constants. Use Value: >100-year data retention guarantees accuracy integrity across product lifetime without recalibration. |
| Automotive Body Control Module Settings | Test Equipment Firmware Parameter Tables |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and user preferences in automotive BCMs. IC Role / Device Role / Timing Role: Byte-writable memory mapped into microcontroller address space for fast random access. Use Value: 120 ns access time satisfies real-time response requirements; software protection prevents corruption during ignition transients. | Use Scenario: Holding instrument-specific test limits, compensation tables, and serial number tracking in benchtop testers. IC Role / Device Role / Timing Role: Page-write-capable storage for batch-programmed configuration sets during manufacturing. Use Value: 64-byte page writes reduce production programming time by >3× vs. byte-by-byte methods. |
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; 5V-only; same 28-pin PDIP; 10,000-cycle endurance | Limited to lower endurance applications; lacks Toggle Bit polling | Select when cost sensitivity outweighs endurance or advanced polling needs |
| MX28LV640CT-12P | 120 ns access; 3.3V/5V dual-supply; 28-pin PDIP; 100,000-cycle endurance; no software protection | Requires level-shifting if system uses strict 5V logic; no built-in software lock | Choose for mixed-voltage systems where 3.3V compatibility is required |
Compared with AT28C64B-15PU and MX28LV640CT-12P, the X28HC64PZ-12 provides superior write endurance and integrated software data protection, while maintaining identical 28-pin PDIP footprint and 120 ns timing - making it optimal for long-life, security-sensitive industrial deployments.
Availability
X28HC64PZ-12 is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and automotive body electronics requiring stable component supply, long-term data integrity, and RoHS-compliant through-hole assembly.
Supply support for X28HC64PZ-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 pioneer in high-reliability analog and nonvolatile memory solutions, delivering precision, power-efficient ICs for industrial, infrastructure, and computing markets.
The X28HC64 product line was engineered specifically for robust, long-lifetime configuration storage in commercial-temperature embedded systems requiring JEDEC-compatible 8-bit parallel EEPROMs with zero external high-voltage circuitry.
FAQ
What is the operating voltage range for the X28HC64PZ-12?
The X28HC64PZ-12 operates strictly from a single 5V supply with a tolerance of ±10%, i.e., 4.5V to 5.5V. It does not support 3.3V or dual-voltage operation. This 5V-only design eliminates charge pumps and simplifies power architecture in legacy 5V systems where the X28HC64PZ-12 is commonly deployed.
Does the X28HC64PZ-12 support page write functionality, and what is its benefit?
Yes, the X28HC64PZ-12 supports 64-byte page write operations, reducing full-memory programming time to approximately 0.25 seconds. This capability allows burst loading of configuration data without waiting for individual byte writes, significantly accelerating manufacturing programming and field firmware updates compared to standard byte-write mode.
How does the software data protection feature work on the X28HC64PZ-12?
The X28HC64PZ-12's software data protection is enabled via a nonvolatile three-byte command sequence (write 0xAA to 0x555, 0x55 to 0x2AA, then 0xA0 to 0x555). Once set, it prevents all writes until the reset sequence is issued. This feature remains active across power cycles and is ideal for safeguarding critical calibration or configuration data in the X28HC64PZ-12.
What are the two end-of-write detection methods supported by the X28HC64PZ-12?
The X28HC64PZ-12 provides DATA Polling on I/O7 (returns complement of written data until complete) and Toggle Bit polling on I/O6 (toggles state during internal programming). Both eliminate the need for fixed delays or external hardware, allowing efficient host-driven write verification directly on the X28HC64PZ-12's data bus.
Is the X28HC64PZ-12 RoHS compliant, and what is its soldering profile?
Yes, the X28HC64PZ-12 is RoHS compliant with 100% matte tin (e3) termination. It is qualified for wave soldering only - not reflow - per Intersil specification. Pb-free PDIP packages like the X28HC64PZ-12 must be processed using through-hole wave soldering to ensure reliability and avoid delamination.
X28HC64PZ-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
X28HC64PZ-12 FAQ
1.How can I place an order for X28HC64PZ-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28HC64PZ-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 X28HC64PZ-12 reliable?
The price and inventory of X28HC64PZ-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28HC64PZ-12 is usually 5 days.
3.What payment methods are accepted for X28HC64PZ-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28HC64PZ-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28HC64PZ-12?
X28HC64PZ-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28HC64PZ-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 X28HC64PZ-12?
For technical support, including X28HC64PZ-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28HC64PZ-12 requirements.
6.How does Aetrix verify that X28HC64PZ-12 is sourced from the original manufacturer or authorized distributors?
All X28HC64PZ-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 X28HC64PZ-12 meets industry standards.
7.What is the process for return or replacement of X28HC64PZ-12?
All X28HC64PZ-12 units undergo pre-shipment inspection (PSI). If there is an issue with X28HC64PZ-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 X28HC64PZ-12 part is unused and in its original packaging.
Return procedure for X28HC64PZ-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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