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Renesas X28C512JI-15
- Part No.:
- X28C512JI-15
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
X28C512JI-15.pdf
- Description:
- IC EEPROM 512KBIT 150NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,004
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Product details
Overview
X28C512JI-15 from Intersil is a 64K × 8 (512 Kbit) byte-alterable EEPROM with 150 ns access time, operating from a single +5 V supply over –40°C to +85°C. It features JEDEC-standard 32-lead PLCC pinout, 128-byte page write capability (≤2.5 s full-write), DATA Polling (I/O7) and Toggle Bit (I/O6) for write-status detection, and software/hardware data protection-used in industrial control firmware storage and configuration memory for legacy embedded systems.
For engineers reviewing the X28C512JI-15 datasheet, X28C512JI-15 pinout, X28C512JI-15 application, or X28C512JI-15 equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), 150 ns read timing, PLCC-32 package compatibility with EPROM sockets, page write efficiency, and dual polling support for real-time write completion monitoring.
Technical Context
The X28C512JI-15 implements a floating-gate CMOS EEPROM array with direct-write cell architecture, supporting both CE- and WE-controlled write cycles. Its two-line control (CE/OE) eliminates bus contention during reads, while internal self-timed programming ensures consistent 5 ms typical byte write duration without external timing circuits.
Page write mode enables up to 128 consecutive bytes per page load cycle with ≤100 µs inter-byte timing window; address bits A7–A15 must remain stable across writes within a page. Status reporting uses dedicated I/O pins: I/O7 for DATA Polling (complement read on busy), I/O6 for Toggle Bit (state alternation during programming).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64K × 8 (512 Kbit) nonvolatile EEPROM array |
| Access time | 150 ns max - defines minimum read cycle time for synchronous bus interfacing |
| Supply voltage | +5 V ±10% - single-rail operation; no VPP or high-voltage programming required |
| Operating temperature | –40°C to +85°C - qualified for industrial-grade embedded applications |
| Write endurance | 100,000 cycles per page - supports frequent field-updatable configuration storage |
| Data retention | 100 years at +25°C - ensures long-term reliability in unpowered storage |
| Page write capacity | 128 bytes per page - reduces host CPU overhead vs. byte-by-byte writes |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), JEDEC MS-016AE, body size 0.490" × 0.490", 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus for selecting one of 65,536 bytes; A7–A15 define page boundary during page write |
| I/O0–I/O7 | Data bidirectional bus | 8-bit parallel interface; I/O6 = Toggle Bit status, I/O7 = DATA Polling bit |
| CE | Chip Enable | Active-low device select; enables read/write when LOW; places outputs in high-Z when HIGH |
| OE | Output Enable | Active-low read control; used with CE to manage bus contention in multi-device systems |
| WE | Write Enable | Active-low write control; latches address/data on falling edge; initiates internal programming |
| VCC | Power supply | +5 V supply; decoupling requires 0.1 µF ceramic capacitor per device |
| VSS | Ground | Reference ground; shared return path for all signals and power |
| NC | No Connect | Pins 2, 4, 32, 34 - not internally bonded; must be left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-standard PLCC pinout | Direct drop-in replacement for X28C010 EPROMs and compatible lower-density EEPROMs |
| Software data protection | Nonvolatile enable/disable via 3-byte unlock sequence; prevents accidental writes during power transitions |
| Hardware write inhibition | Simultaneous OE=LOW, WE=HIGH, or CE=HIGH blocks writes - ensures data integrity at power-up/down |
| Direct Write™ cell technology | Eliminates pre-erase requirement and over-erase risk; enables true byte-alterable operation |
| Pb-free plus anneal option | RoHS-compliant termination (100% matte tin); compatible with SnPb and Pb-free reflow profiles |
Applications
| Industrial PLC Configuration Storage | Legacy Avionics Bootloader Memory |
|---|---|
Use Scenario: Storing user-defined I/O mapping, calibration tables, and runtime parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during system boot and runtime updates; 150 ns access supports 6 MHz bus timing. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliable operation in uncontrolled cabinet environments; software protection prevents corruption during brownout events. | Use Scenario: Holding bootloader firmware and aircraft-specific initialization code in certified avionics subsystems where field updates are infrequent but critical. IC Role / Device Role / Timing Role: Read-only execution memory during cold start; write-enabled only during maintenance uploads via dedicated service port. Use Value: 100-year data retention meets DO-160E long-life requirements; JEDEC pin compatibility simplifies redesign from obsolete EPROMs. |
| Medical Device Calibration Data | Telecom Line Card Parameter Storage |
Use Scenario: Retaining sensor offset/gain coefficients and regulatory compliance settings across power cycles in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store; accessed via microcontroller SPI-to-parallel bridge during self-test. Use Value: Dual polling (I/O6/I/O7) enables deterministic write confirmation without interrupts; hardware write inhibit guards against ESD-induced spurious writes. | Use Scenario: Storing line impedance profiles, gain settings, and fault history logs in carrier-grade DSLAM line cards operating in central office environments. IC Role / Device Role / Timing Role: High-reliability configuration memory interfaced to ASIC host controller using standard parallel bus protocol. Use Value: 100,000 write cycles support decades of field recalibration; PLCC-32 package allows socketed replacement without PCB rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C512-15PU | Same 64K×8 capacity, 150 ns access, PDIP-32 package; active current 40 mA (vs. 50 mA) | Commercial temp range (0°C to +70°C); lacks industrial-grade qualification | Select for cost-sensitive, non-industrial designs where socketed DIP is preferred and ambient temperature remains controlled. |
| MN65C512-15PL | 64K×8 EEPROM, 150 ns, PLCC-32; standby current 200 µA (vs. 500 µA); RoHS-compliant | Industrial temp range (–40°C to +85°C); no Toggle Bit polling support | Choose when lower standby power is critical and DATA Polling alone suffices for write-status monitoring. |
Compared with AT28C512-15PU and MN65C512-15PL, the X28C512JI-15 uniquely combines industrial temperature rating, dual polling (I/O6/I/O7), and JEDEC EPROM-compatible PLCC pinout-making it optimal for legacy system upgrades requiring drop-in reliability and real-time write feedback.
Availability
X28C512JI-15 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, legacy avionics bootloader memory, and medical device calibration data retention requiring stable component supply across extended product lifecycles.
Supply support for X28C512JI-15 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-performance analog and mixed-signal ICs with emphasis on reliability, longevity, and legacy system support.
The X28C512JI-15 belongs to Intersil's byte-alterable EEPROM product line, engineered for industrial and aerospace applications demanding robust nonvolatile memory with EPROM socket compatibility and deterministic write verification.
FAQ
What is the operating temperature range of the X28C512JI-15?
The X28C512JI-15 is rated for industrial operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table (Page 3) and Recommended Operating Conditions (Page 11) of the FN8106 datasheet. The "I" suffix explicitly denotes the industrial temperature grade, distinguishing it from commercial (0°C to +70°C) and military (–55°C to +125°C) variants. Thermal derating is not required within this range.
Does the X28C512JI-15 require external high-voltage programming circuitry?
No, the X28C512JI-15 operates from a single +5 V supply with no external high voltages or VPP control circuits required. As stated in the Features section (Page 1), it uses Intersil's proprietary floating-gate CMOS process enabling "Direct Write™" functionality. All programming is self-timed and internally generated, eliminating the need for external programmers or elevated voltage rails.
How does software data protection work on the X28C512JI-15?
Software data protection on the X28C512JI-15 is enabled via a nonvolatile three-byte unlock sequence written to specific addresses (5555h, 2AAAh, 5555h) followed by a command byte (80h). Once set, further writes require repeating the sequence. The feature is disabled by default at shipment and persists through power cycles. Full details are in Figures 4A/4B and Page 8 of the FN8106 datasheet.
What is the purpose of the Toggle Bit (I/O6) and DATA Polling (I/O7) on the X28C512JI-15?
The Toggle Bit (I/O6) alternates logic state on successive reads during internal programming, ceasing when complete. DATA Polling (I/O7) returns the complement of the last written byte while busy, then true data upon completion. Both provide host software with deterministic, interrupt-free write-status feedback-reducing average write time versus fixed-delay polling. Their operation is defined in Figures 1, 2A/B, and 3A/B (Pages 5–7).
Is the X28C512JI-15 pin-compatible with standard EPROMs?
Yes, the X28C512JI-15 features the JEDEC-approved pinout for byte-wide memories and is explicitly stated as "X28C010 EPROM pin compatible" in the Features section (Page 1). Its 32-lead PLCC package matches industry-standard EPROM footprints, enabling direct replacement in existing sockets without PCB modification-provided timing and voltage requirements are met.
X28C512JI-15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Bulk
- 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:
- 150 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)
X28C512JI-15 FAQ
1.How can I place an order for X28C512JI-15 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28C512JI-15 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 X28C512JI-15 reliable?
The price and inventory of X28C512JI-15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28C512JI-15 is usually 5 days.
3.What payment methods are accepted for X28C512JI-15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28C512JI-15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28C512JI-15?
X28C512JI-15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28C512JI-15 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 X28C512JI-15?
For technical support, including X28C512JI-15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28C512JI-15 requirements.
6.How does Aetrix verify that X28C512JI-15 is sourced from the original manufacturer or authorized distributors?
All X28C512JI-15 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 X28C512JI-15 meets industry standards.
7.What is the process for return or replacement of X28C512JI-15?
All X28C512JI-15 units undergo pre-shipment inspection (PSI). If there is an issue with X28C512JI-15, 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 X28C512JI-15 part is unused and in its original packaging.
Return procedure for X28C512JI-15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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