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Renesas X28HC64SIZ-12T1
- Part No.:
- X28HC64SIZ-12T1
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X28HC64SIZ-12T1.pdf
- Description:
- IC EEPROM 64KBIT PAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
X28HC64SIZ-12T1 from Intersil is a 64 kbit (8k × 8) parallel-interface EEPROM with 120 ns access time, single 5V supply operation, and industrial temperature range (–40°C to +85°C). It features byte- and page-write capability, hardware/software data protection, and JEDEC-standard 28-pin SOIC packaging - used in embedded control systems for nonvolatile parameter storage, calibration data retention, and firmware configuration backup.
For engineers reviewing the X28HC64SIZ-12T1 datasheet, X28HC64SIZ-12T1 pinout, X28HC64SIZ-12T1 application, or X28HC64SIZ-12T1 equivalent, key selection considerations include its 120 ns read timing, 2 ms typical byte write cycle, 64-byte page write support, software data protection algorithm, and compatibility with legacy 5V microcontroller buses requiring JEDEC-compliant byte-wide memory interfaces.
Technical Context
The X28HC64SIZ-12T1 implements a floating-gate CMOS EEPROM array with dual-line control architecture (CE/OE/WE), enabling bus contention-free reads and deterministic write initiation. Its internal timing logic supports self-timed writes without external high-voltage circuitry or erase-before-write sequences.
It delivers end-of-write detection via DATA polling (I/O7 complement behavior) and Toggle Bit polling (I/O6 state alternation), both compliant with JEDEC-standard read-cycle timing. The device integrates default VCC sense and write-inhibit logic to prevent spurious writes during power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 kbit (8,192 × 8-bit organization) - supports full byte-addressable access without banking or multiplexing overhead. |
| Access Time | 120 ns max - meets timing requirements of 8 MHz Z80, 8051, and 68K-based controllers with minimal wait-state insertion. |
| Write Cycle Time | 2 ms typical byte write - enables deterministic firmware update latency; page write reduces full-memory rewrite to 0.25 s. |
| Endurance | 100,000 write/erase cycles - validated for applications requiring frequent field calibration updates over 10+ years. |
| Data Retention | 100 years at +85°C - ensures long-term integrity of stored configuration data in unpowered industrial environments. |
| Supply Voltage | 5 V ±10% - operates directly from standard logic rails; no charge pump or external voltage translation required. |
| Operating Temp | –40°C to +85°C - qualified for deployment in motor drives, PLC I/O modules, and outdoor metering equipment. |
Pinout & Package
Package: 28-pin SOIC (300 mil, RoHS-compliant, M28.3 footprint). Pin count and physical layout match JEDEC MS-013-AE standard for drop-in replacement in legacy 5V memory sockets.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus supporting full 8k-word addressing; compatible with 16-bit CPU lower-address lines. |
| I/O0–I/O7 | Bi-directional Data Bus | True 8-bit parallel interface; high-impedance when CE or OE is HIGH - eliminates bus contention in multi-device systems. |
| CE | Chip Enable | Primary device select; must be LOW for all operations; enables low-power standby mode (≤200 µA) when HIGH. |
| OE | Output Enable | Controls output buffers only; allows read operations while CE remains active - critical for memory-mapped I/O arbitration. |
| WE | Write Enable | Initiates write cycles; latches data on rising edge; supports both CE- and WE-controlled write timing modes. |
| VCC / VSS | Power / Ground | Single 5V supply; requires local 0.1 µF ceramic decoupling per device to suppress transient current spikes during write. |
| NC | No Connect | Pins 1 and 28 are unconnected - no internal bonding; must remain floating or grounded per PCB layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Byte-Wide Pinout | Direct replacement for industry-standard SRAMs and EPROMs in existing 28-pin SOIC footprints - zero PCB redesign needed. |
| Page Write (64-byte) | Reduces average write time to 32 µs/byte - accelerates bulk configuration updates in bootloaders and field-service tools. |
| DATA Polling (I/O7) | Eliminates fixed-delay waits by returning complemented last-written data until programming completes - simplifies interrupt-free firmware drivers. |
| Software Data Protection | Nonvolatile lock activated via 3-byte command sequence - prevents accidental writes after power-up without external hardware safeguards. |
| Hardware Write Inhibit | Automatic protection when VCC < 3V or when OE=LOW/WE=HIGH/CE=HIGH - ensures data integrity during brown-out and reset conditions. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Backup |
|---|---|
|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and user-defined alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains settings across power cycles and supports field updates via HMI or service port. Use Value: 100,000 endurance cycles enable daily recalibration logging; 120 ns access ensures real-time parameter fetch during scan cycles without jitter. |
Use Scenario: Preserving sensor offset/gain coefficients and regulatory compliance logs in portable diagnostic instruments operating in clinical environments. IC Role / Device Role / Timing Role: Secure calibration vault - isolated from main processor bus during power transitions using hardware write inhibit. Use Value: 100-year data retention guarantees traceability over product lifetime; software protection prevents unauthorized firmware tampering. |
| Automotive Body Control Module (BCM) | Telecom Line Card Firmware Settings |
|
Use Scenario: Holding seat/mirror position presets, lighting profiles, and CAN node configuration in automotive BCMs exposed to –40°C cold cranking and 85°C under-hood temperatures. IC Role / Device Role / Timing Role: Temperature-hardened parameter store - operates reliably across full industrial grade range without derating. Use Value: RoHS-compliant 28-pin SOIC package withstands automotive reflow profiles; 5V-only interface simplifies power domain design. |
Use Scenario: Maintaining port-specific provisioning data, clock source selection, and fault history in carrier-grade line cards requiring hot-swap compatibility. IC Role / Device Role / Timing Role: Hot-swap-safe configuration manager - high-impedance I/Os during CE HIGH prevent backdrive during card insertion/removal. Use Value: Dual polling methods (DATA/Toggle Bit) allow status checking without dedicated interrupt lines - conserves FPGA GPIO resources. |
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; 10,000 endurance cycles; PDIP only; no software protection | Limited to commercial temp (0°C to +70°C); lacks page write and toggle bit polling | Select for cost-sensitive, non-industrial designs where 120 ns timing and extended endurance are not required. |
| MX28LV640CT-12G | 120 ns access; 100,000 cycles; 32-pin PLCC; supports 3.3V/5V I/O but requires 3.3V core | Requires level-shifting for pure 5V systems; larger footprint increases board area vs. 28-pin SOIC | Choose when migrating to mixed-voltage systems or needing higher-density packaging with identical timing. |
Compared with AT28C64B-15PU and MX28LV640CT-12G, the X28HC64SIZ-12T1 uniquely combines industrial temperature rating, JEDEC-compliant 28-pin SOIC packaging, software data protection, and 64-byte page write - making it optimal for space-constrained, high-reliability 5V embedded systems requiring field-updatable configuration.
Availability
X28HC64SIZ-12T1 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and telecom line cards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for X28HC64SIZ-12T1 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, now part of Renesas Electronics, with deep heritage in nonvolatile memory and industrial-grade IC design.
The X28HC64 product line was engineered for robust, 5V-compatible EEPROM replacement in legacy industrial and automotive control systems - emphasizing reliability, JEDEC interoperability, and simplified system integration.
FAQ
What is the maximum operating temperature range for the X28HC64SIZ-12T1?
The X28HC64SIZ-12T1 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table (Page 2) and Absolute Maximum Ratings section (Page 9) of the FN8109 Rev 4.00 datasheet. The "I" in the part number explicitly denotes industrial grade, and the "Z" suffix confirms RoHS-compliant packaging. This range enables use in demanding environments such as motor control cabinets and outdoor metering housings where ambient thermal stress exceeds commercial limits.
Does the X28HC64SIZ-12T1 require external high-voltage programming circuitry?
No, the X28HC64SIZ-12T1 operates from a single 5V supply with no external high-voltage circuitry required. As stated in the datasheet introduction and Features list, it is a "5V only device" that uses self-timed internal charge pumps. All write operations - including byte and page writes - are initiated with standard TTL/CMOS-level CE, WE, and OE signals. This eliminates the need for VP-P generators or complex programming algorithms, simplifying host controller design and reducing BOM cost.
How does the software data protection feature work on the X28HC64SIZ-12T1?
The X28HC64SIZ-12T1 software data protection is enabled via a nonvolatile 3-byte command sequence written to specific addresses (0x5555, 0x2AAA, 0x5555) as shown in Figure 8 of the datasheet. Once activated, the device enters a protected state where subsequent writes require reissuing the unlock sequence. The protection persists through power cycles and remains active until explicitly reset using the six-step deactivation algorithm. This feature is shipped disabled and must be intentionally configured by the host system.
What is the purpose of the Toggle Bit (I/O6) polling function in the X28HC64SIZ-12T1?
The Toggle Bit (I/O6) provides an alternative end-of-write detection method: during internal programming, I/O6 toggles between HIGH and LOW on successive reads; when toggling stops, the write is complete. Unlike DATA polling (I/O7), Toggle Bit polling does not require saving the last address or data value - making it ideal for multi-device arrays or multiprocessor systems where shared bus arbitration complicates address tracking. This behavior is fully documented in Figures 5 and 6 of the FN8109 datasheet.
Is the X28HC64SIZ-12T1 pin-compatible with standard SRAMs?
Yes, the X28HC64SIZ-12T1 uses the JEDEC-approved pinout for byte-wide memories, explicitly stated on Page 1 of the datasheet. Its 28-pin SOIC package matches the pin assignments of industry-standard 8k × 8 SRAMs (e.g., IS61LV256AL, CY62256) - including identical A0–A12, I/O0–I/O7, CE, OE, WE, VCC, and VSS locations. This enables direct socket replacement in legacy designs without PCB modification, provided timing and control logic accommodate EEPROM's write latency.
X28HC64SIZ-12T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-12T1 FAQ
1.How can I place an order for X28HC64SIZ-12T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28HC64SIZ-12T1 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-12T1 reliable?
The price and inventory of X28HC64SIZ-12T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28HC64SIZ-12T1 is usually 5 days.
3.What payment methods are accepted for X28HC64SIZ-12T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28HC64SIZ-12T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28HC64SIZ-12T1?
X28HC64SIZ-12T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28HC64SIZ-12T1 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-12T1?
For technical support, including X28HC64SIZ-12T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28HC64SIZ-12T1 requirements.
6.How does Aetrix verify that X28HC64SIZ-12T1 is sourced from the original manufacturer or authorized distributors?
All X28HC64SIZ-12T1 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-12T1 meets industry standards.
7.What is the process for return or replacement of X28HC64SIZ-12T1?
All X28HC64SIZ-12T1 units undergo pre-shipment inspection (PSI). If there is an issue with X28HC64SIZ-12T1, 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-12T1 part is unused and in its original packaging.
Return procedure for X28HC64SIZ-12T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X28HC64SIZ-12T1 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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