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Renesas X28C512JIZ-12
- Part No.:
- X28C512JIZ-12
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
X28C512JIZ-12.pdf
- Description:
- IC EEPROM 512KBIT PAR 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,935
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Product details
Overview
X28C512JIZ-12 from Intersil is a 64K × 8 (512 Kbit), 5V-only, byte-alterable EEPROM in 32-lead PLCC package with Pb-free finish, -40°C to +85°C operating range, 120 ns access time, and software/hardware data protection-used for nonvolatile configuration storage in industrial control modules, legacy embedded systems, and firmware parameter retention.
For engineers reviewing the X28C512JIZ-12 datasheet, X28C512JIZ-12 pinout, X28C512JIZ-12 application, or X28C512JIZ-12 equivalent, key selection considerations include its JEDEC-standard 32-pin PLCC footprint, 120 ns read timing, 100,000 write-cycle endurance, page-write capability (128-byte burst), and dual status polling (DATA Polling on I/O7, Toggle Bit on I/O6) for efficient system-level write management.
Technical Context
The X28C512JIZ-12 implements a floating-gate CMOS EEPROM array with direct-write cell architecture, supporting both CE- and WE-controlled write cycles and requiring no external high-voltage programming supply. Its two-line control interface (CE/OE for reads, CE/WE for writes) eliminates bus contention in multi-device memory arrays.
It features hardware-level noise immunity (10 ns WE pulse rejection), VCC sense (write inhibit below 3.6 V), and software data protection enabled via a three-byte unlock sequence (AAh→55h→80h at 5555h/2AAAh/5555h). Page write mode allows up to 128 consecutive bytes within a single 100 µs load window before internal programming begins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64K × 8 (512 Kbit) - supports full byte-addressable storage for boot parameters or calibration tables |
| Access time | 120 ns - enables compatibility with 8 MHz Z80, 68K, or early ARM bus timing |
| Write endurance | 100,000 cycles per page - ensures long-term reliability in field-updatable firmware storage |
| Data retention | 100 years - guarantees nonvolatile data integrity across product lifecycle without refresh |
| Supply current | 50 mA active / 500 µA standby - minimizes power impact during frequent reads and low-power sleep modes |
| Page write capacity | 128 bytes - reduces total write time to <2.5 s for full memory programming |
| Operating temperature | -40°C to +85°C - qualified for industrial-grade embedded environments |
| Pb-free compliance | RoHS-compliant (Pb-free plus anneal) - meets environmental requirements for modern manufacturing |
Pinout & Package
32-lead Plastic Leaded Chip Carrier (PLCC), Pb-free matte tin finish, JEDEC MS-016AE compliant, body dimensions 0.490" × 0.490" (12.45 mm × 12.45 mm), 1.20 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus for full 64K byte addressing; A7–A15 define page boundary for page write |
| I/O0–I/O7 | Data bidirectional bus | Byte-wide data path; I/O7 = DATA Polling bit, I/O6 = Toggle Bit for write status monitoring |
| CE | Chip Enable | Active-low device select; must be LOW for read/write; HIGH places device in 500 µA standby |
| OE | Output Enable | Active-low output control; used with CE for read operations; enables high-impedance state when HIGH |
| WE | Write Enable | Active-low write control; latches data on rising edge of CE or WE (whichever occurs first) |
| VCC | Power supply | +5 V ±10% only - no VPP or auxiliary voltage required |
| VSS | Ground | Reference return for all signals and power |
| NC | No connect | Pins 2, 4, 32, 34 - unconnected internally; must remain unpopulated on PCB |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-standard PLCC pinout | Drop-in replacement for X28C010 EPROM and lower-density EEPROMs in existing 32-pin layouts |
| Self-timed write cycle | Eliminates need for external timing logic or wait-state generation in microcontroller interfaces |
| Software data protection | Nonvolatile lock enabled by 3-byte unlock sequence; prevents accidental writes during power transitions |
| Early write completion detection | DATA Polling (I/O7) and Toggle Bit (I/O6) allow CPU to poll status instead of fixed delays |
| Direct Write™ cell technology | Enables no-erase-before-write operation and avoids over-erase degradation over 100k cycles |
| Hardware write inhibition | Automatic protection during power-up/down via VCC sense, noise filtering, and control-line default states |
Applications
| Industrial PLC Configuration Storage | Legacy Medical Device Calibration Tables |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced to 8-bit microcontrollers (e.g., 8051 derivatives) via parallel bus with 120 ns timing margin. Use Value: 100-year data retention ensures calibration persistence across 15+ year equipment lifecycles without battery backup. | Use Scenario: Retaining sensor calibration coefficients and user-adjusted therapy parameters in FDA-cleared diagnostic instruments. IC Role / Device Role / Timing Role: Byte-alterable memory accessed during device boot and service mode; protected against ESD-induced corruption via software lock. Use Value: Hardware + software data protection prevents inadvertent overwrite during power cycling or electromagnetic interference events. |
| Avionics System Bootloader Parameters | Telecom Line Card Firmware Settings |
Use Scenario: Holding bootloader configuration flags, FPGA bitstream version IDs, and watchdog timeout values in DO-254-certified airborne electronics. IC Role / Device Role / Timing Role: Industrial-temperature (-40°C to +85°C) EEPROM used in cold-start environments; accessed via discrete address/data bus. Use Value: 100,000 write cycles support field updates over 10+ years of maintenance cycles without wear-out risk. | Use Scenario: Storing port-specific gain settings, DSP initialization vectors, and protocol handshake parameters in carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Parallel-interface EEPROM integrated into legacy 16-bit data bus architecture; supports page writes to minimize update latency. Use Value: 128-byte page write reduces full-parameter reprogramming time from >10 s to <2.5 s, improving service turnaround. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C512-12PU | Same 64K×8 capacity, 120 ns access, PDIP-32 package; requires 5V only but lacks Pb-free anneal process | Not RoHS-compliant out-of-box; incompatible with lead-free reflow profiles unless modified | Select if legacy through-hole assembly is required and RoHS exemption applies |
| MN5Q512KB-12PL | 64K×8, 120 ns, PLCC-32, -40°C to +85°C; uses different page-write timing (max 50 µs load window vs. 100 µs) | Toggle Bit polling behavior differs; requires updated driver timing checks for status loop | Select only after validating status polling firmware against MN5Q512KB-12PL timing spec |
Compared with AT28C512-12PU and MN5Q512KB-12PL, the X28C512JIZ-12 offers guaranteed Pb-free reflow compatibility, identical JEDEC pinout, and wider 100 µs page-write load window-reducing firmware complexity in systems where host processor timing margins are tight.
Availability
X28C512JIZ-12 is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, avionics bootloaders, and telecom line card firmware storage requiring stable component supply across extended product lifecycles.
Supply support for X28C512JIZ-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, now part of Renesas Electronics, designs high-reliability analog and mixed-signal ICs for industrial, aerospace, and communications markets.
The X28C512JIZ-12 belongs to Intersil's legacy parallel EEPROM product line, engineered for drop-in replacement of EPROMs and early-generation EEPROMs in systems requiring proven, long-lifecycle nonvolatile storage without complex interface logic.
FAQ
What is the maximum write cycle time for a single byte on the X28C512JIZ-12?
The X28C512JIZ-12 has a maximum write cycle time (tWC) of 10 ms per byte when not using polling. However, with DATA Polling (I/O7) or Toggle Bit (I/O6) status checking, actual system-level write latency is reduced significantly-typically under 5 ms-because the host can detect completion earlier than the worst-case 10 ms timeout. This behavior is confirmed in the FN8106 Rev 2.00 datasheet Section "Write Operation Status Bits".
Does the X28C512JIZ-12 require an external high-voltage supply for programming?
No, the X28C512JIZ-12 operates from a single +5 V ±10% supply and requires no external VPP or high-voltage programming circuitry. All internal programming voltages are generated on-chip using charge-pump circuitry, as stated in the datasheet introduction: "No external high voltages or VPP control circuits." This simplifies board design and eliminates associated BOM cost and layout complexity.
How does software data protection work on the X28C512JIZ-12?
Software data protection on the X28C512JIZ-12 is enabled by writing three specific bytes (AAh → 55h → 80h) to addresses 5555h, 2AAAh, and 5555h respectively. Once set, further writes require repeating this sequence. The protection is nonvolatile and persists through power cycles. The X28C512JIZ-12 datasheet Figure 4B and Section "Software Data Protection" confirm this exact algorithm and its persistent behavior.
Is the X28C512JIZ-12 pin-compatible with the X28C010 EPROM?
Yes, the X28C512JIZ-12 uses the JEDEC-approved pinout for byte-wide memories and is explicitly documented as X28C010 EPROM pin compatible in the FN8106 datasheet Features section. Both devices share identical 32-pin PLCC signal assignments (A0–A15, I/O0–I/O7, CE, OE, WE, VCC, VSS), enabling direct replacement in legacy EPROM sockets without PCB modification.
What is the endurance specification for page writes on the X28C512JIZ-12?
The X28C512JIZ-12 is rated for 100,000 write cycles per page, as specified in the "Endurance and Data Retention" table on page 11 of FN8106 Rev 2.00. This exceeds the 10,000-cycle rating for individual byte writes and reflects the robustness of Intersil's Direct Write™ cell architecture under burst-programming conditions typical in firmware update scenarios.
X28C512JIZ-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- 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:
- 32-PLCC (13.97x11.43)
X28C512JIZ-12 FAQ
1.How can I place an order for X28C512JIZ-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28C512JIZ-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 X28C512JIZ-12 reliable?
The price and inventory of X28C512JIZ-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28C512JIZ-12 is usually 5 days.
3.What payment methods are accepted for X28C512JIZ-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28C512JIZ-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28C512JIZ-12?
X28C512JIZ-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28C512JIZ-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 X28C512JIZ-12?
For technical support, including X28C512JIZ-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28C512JIZ-12 requirements.
6.How does Aetrix verify that X28C512JIZ-12 is sourced from the original manufacturer or authorized distributors?
All X28C512JIZ-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 X28C512JIZ-12 meets industry standards.
7.What is the process for return or replacement of X28C512JIZ-12?
All X28C512JIZ-12 units undergo pre-shipment inspection (PSI). If there is an issue with X28C512JIZ-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 X28C512JIZ-12 part is unused and in its original packaging.
Return procedure for X28C512JIZ-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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