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Renesas X28HC64JIZ-12
- Part No.:
- X28HC64JIZ-12
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
X28HC64JIZ-12.pdf
- Description:
- IC EEPROM 64KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,492
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Product details
Overview
X28HC64JIZ-12 from Intersil is a 64 kbit (8k × 8), byte-alterable EEPROM with JEDEC-standard 32-lead PLCC packaging, -40°C to +85°C industrial temperature range, 120 ns access time, and single 5 V supply operation. It serves as nonvolatile configuration storage in embedded controllers, industrial PLCs, and telecom line cards where data integrity across power cycles is critical.
For engineers reviewing the X28HC64JIZ-12 datasheet, X28HC64JIZ-12 pinout, X28HC64JIZ-12 application, or X28HC64JIZ-12 equivalent, key selection criteria include page write capability (64-byte burst), dual end-of-write detection (DATA polling on I/O7 and Toggle Bit on I/O6), software/hardware data protection, 100,000 write endurance, and RoHS-compliant Pb-free PLCC packaging.
Technical Context
The X28HC64JIZ-12 implements a floating-gate CMOS EEPROM array with two-line control architecture (CE/OE for reads, CE/WE for writes), enabling bus contention avoidance in multi-device memory systems. Its internal timing logic supports self-timed byte and page writes without external high-voltage circuitry or erase-before-write sequences.
It features dual status reporting: DATA Polling (I/O7 toggles complement of last written byte until completion) and Toggle Bit (I/O6 toggles on successive reads during programming). Both mechanisms allow host firmware to poll status without interrupts or dedicated hardware, reducing system-level complexity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 kbit (8,192 × 8-bit words); sufficient for firmware boot parameters, calibration tables, or device configuration registers. |
| Access time | 120 ns max; enables direct interfacing with legacy 8-bit microcontrollers (e.g., 8051, Z80) operating at ≤8 MHz without wait states. |
| Write cycle time | 2 ms typical per byte or page; full 64k memory rewrite completes in 0.25 s, supporting rapid field updates. |
| Endurance | 100,000 write/erase cycles; validated for applications requiring frequent reconfiguration (e.g., programmable logic controllers). |
| Data retention | 100 years at +25°C; ensures long-term reliability in unattended infrastructure equipment (e.g., remote sensors, base station modules). |
| Supply voltage | 5 V ±10%; operates from standard TTL-compatible rails without auxiliary voltage regulators. |
| Standby current | 200 µA max; minimizes quiescent power in battery-backed or energy-constrained systems. |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), RoHS-compliant, JEDEC MS-016AE (N32.45x55), body size 12.5 mm × 12.5 mm × 3.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address inputs | 13-bit address bus selecting one of 8,192 memory locations; A6–A12 define page boundaries for 64-byte page writes. |
| I/O0–I/O7 | Bi-directional data bus | 8-bit parallel interface; I/O7 provides DATA Polling status, I/O6 provides Toggle Bit status during write cycles. |
| CE | Chip Enable | Primary device select; must be LOW for read/write; HIGH places outputs in high-impedance state and reduces ICC to standby level. |
| OE | Output Enable | Controls output buffers during reads; LOW enables data output; used with CE for two-line read control to prevent bus contention. |
| WE | Write Enable | Initiates write operations when CE is also LOW; falling edge latches address/data; rising edge triggers internal programming. |
| VCC / VSS | Power / Ground | +5 V supply and return; requires local 0.1 µF ceramic decoupling per device to suppress transient spikes during CE transitions. |
| NC | No Connect | Pins 3, 13, 29, 30 are unconnected; must remain floating-no routing or grounding permitted. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-standard pinout | Pin-compatible with industry-standard SRAMs and EPROMs, enabling drop-in replacement in existing 8-bit memory sockets without PCB redesign. |
| 64-byte page write | Reduces total programming time by >95% vs. sequential byte writes-full memory rewrite in 0.25 s instead of ~16 s. |
| Dual write-status reporting | Eliminates need for fixed delay loops or external interrupt lines: DATA Polling (I/O7) and Toggle Bit (I/O6) provide deterministic, software-driven completion detection. |
| Hardware + software data protection | Default VCC sense (write inhibit below 3 V) and configurable software lock prevent accidental writes during power-up/down or runtime; reset algorithm restores full access. |
| Industrial temperature range | -40°C to +85°C operation validated per JEDEC JESD22-A108; suitable for deployment in harsh environments including factory automation and outdoor telecom enclosures. |
Applications
| Industrial PLC Configuration Storage | Telecom Line Card Calibration Data |
|---|---|
|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in manufacturing cells. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed during controller boot and runtime parameter updates via RS-485 or CAN bus. Use Value: Ensures deterministic startup behavior after power loss; 100,000-cycle endurance supports daily recalibration without wear-out concerns. |
Use Scenario: Holding DAC offset/gain coefficients and channel-specific equalization settings in DSLAM line cards operating in central office environments. IC Role / Device Role / Timing Role: Calibration memory mapped into microcontroller address space; updated during factory test and field maintenance via JTAG or serial interface. Use Value: 120 ns access time enables real-time coefficient loading during line initialization; 100-year data retention eliminates periodic recalibration schedules. |
| Medical Device Safety Parameters | Automotive Body Control Module Settings |
|
Use Scenario: Archiving FDA-mandated safety limits (e.g., maximum infusion rate, pressure thresholds) in infusion pumps and ventilators. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element accessed only by certified firmware; protected by software lock and VCC-sense hardware inhibit. Use Value: Dual protection layers meet IEC 62304 Class C requirements; RoHS-compliant PLCC allows lead-free reflow assembly in regulated medical PCBs. |
Use Scenario: Retaining user preferences (seat position, mirror angle, lighting profiles) and diagnostic fault logs in automotive BCMs across vehicle lifetime. IC Role / Device Role / Timing Role: Low-power configuration memory interfaced to 8-bit MCU over parallel bus; accessed during ignition-on initialization and sleep-mode wake events. Use Value: 200 µA standby current extends battery life during vehicle dormancy; -40°C to +85°C rating ensures operation in under-hood thermal zones. |
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; 28-pin PDIP only; no Toggle Bit polling; 10,000-cycle endurance. | Limited to commercial temp (0°C to +70°C); lacks industrial-grade reliability and dual-status reporting. | Select only for cost-sensitive, non-critical applications where 120 ns timing and 100k endurance are not required. |
| M95640-DW | Serial SPI interface; 5 MHz max clock; 5 ms write cycle; 400 kHz I²C-compatible option available. | Requires MCU SPI peripheral and software driver; incompatible with parallel-bus architectures. | Choose for space-constrained designs needing <10 mm² footprint; not suitable as pin-for-pin replacement for X28HC64JIZ-12. |
Compared with AT28C64B-15PU and M95640-DW, the X28HC64JIZ-12 delivers faster parallel access, higher endurance, industrial temperature support, and dual polling modes-making it optimal for legacy 8-bit systems requiring robust, low-latency nonvolatile storage without protocol translation overhead.
Availability
X28HC64JIZ-12 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, and medical infusion pumps requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for X28HC64JIZ-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 precision analog and power management semiconductor provider, acquired by Renesas Electronics in 2017, with legacy products widely deployed in industrial and infrastructure systems.
The X28HC64 product line was designed for byte-alterable, 5 V-only nonvolatile memory applications in embedded control systems where compatibility with standard memory buses and long-term data integrity are essential.
FAQ
What is the operating temperature range for the X28HC64JIZ-12?
The X28HC64JIZ-12 is rated for industrial operation from -40°C to +85°C, verified per JEDEC JESD22-A108. This range supports deployment in factory automation, outdoor telecom, and automotive under-hood environments where ambient temperatures exceed commercial-grade limits. The "I" suffix in the part number explicitly denotes this extended temperature qualification.
Does the X28HC64JIZ-12 require external high-voltage programming circuitry?
No, the X28HC64JIZ-12 operates from a single 5 V supply with no external high-voltage generators or VP-P control circuits. Its internal charge pump handles all programming voltages, enabling simple integration into 5 V logic systems. This eliminates the need for discrete voltage multipliers or specialized programmers-standard microcontroller GPIOs suffice for CE, OE, WE, and I/O control.
How does the page write function work on the X28HC64JIZ-12?
The X28HC64JIZ-12 supports 64-byte page writes: after initiating the first byte write, up to 63 additional bytes can be loaded within 100 µs of each preceding WE pulse. The internal programming cycle starts only after the 100 µs window expires. This allows the host to interleave memory accesses-e.g., fetching next data from another device-while the X28HC64JIZ-12 buffers the page internally before committing.
What are the two methods for detecting write completion on the X28HC64JIZ-12?
The X28HC64JIZ-12 provides DATA Polling (I/O7 returns complement of last written byte until complete) and Toggle Bit (I/O6 toggles on successive reads during programming). Both operate as standard read cycles subject to tRC timing, eliminating need for timers or interrupts. I/O7 requires saving the last address/data; I/O6 needs only repeated reads-ideal for multi-device arrays.
Is the X28HC64JIZ-12 RoHS compliant and what package type does it use?
Yes, the X28HC64JIZ-12 uses a 32-lead PLCC package with 100% matte tin (e3) termination, fully compliant with RoHS Directive 2011/65/EU. It employs Pb-free molding compounds and die attach materials, qualified for SnPb and Pb-free soldering per IPC/JEDEC J-STD-020. The package drawing is N32.45x55, with body dimensions 12.5 mm × 12.5 mm × 3.5 mm.
X28HC64JIZ-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- 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:
- 32-PLCC (13.97x11.43)
X28HC64JIZ-12 FAQ
1.How can I place an order for X28HC64JIZ-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28HC64JIZ-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 X28HC64JIZ-12 reliable?
The price and inventory of X28HC64JIZ-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28HC64JIZ-12 is usually 5 days.
3.What payment methods are accepted for X28HC64JIZ-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28HC64JIZ-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28HC64JIZ-12?
X28HC64JIZ-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28HC64JIZ-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 X28HC64JIZ-12?
For technical support, including X28HC64JIZ-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28HC64JIZ-12 requirements.
6.How does Aetrix verify that X28HC64JIZ-12 is sourced from the original manufacturer or authorized distributors?
All X28HC64JIZ-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 X28HC64JIZ-12 meets industry standards.
7.What is the process for return or replacement of X28HC64JIZ-12?
All X28HC64JIZ-12 units undergo pre-shipment inspection (PSI). If there is an issue with X28HC64JIZ-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 X28HC64JIZ-12 part is unused and in its original packaging.
Return procedure for X28HC64JIZ-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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