Features
- 70ns access time
- Simple byte and page write
- Single 5V supply
- No external high voltages or VP-P control circuits
- Self-timed
- No erase before write
- No complex programming algorithms
- No overerase problem
- Low power CMOS
- 40mA active current maximum
- 200μA standby current maximum
- Fast write cycle times
- 64-byte page write operation
- Byte or page write cycle: 2ms typical
- Complete memory rewrite: 0.25s typical
- Effective byte write cycle time: 32μs typical
- Software data protection
- End of write detection
- DATA polling
- Toggle bit
- High reliability
- Endurance: 100,000 cycles
- Data retention: 100 years
- JEDEC approved byte-wide pinout
- Pb-free available (RoHS compliant)
X28HC64 Functional Diagram
Description
The X28HC64 is an 8k x 8 EEPROM, fabricated with Intersil’s proprietary, high performance, floating gate CMOS technology. Like all Intersil programmable nonvolatile memories, the X28HC64 is a 5V only device. It features the JEDEC approved pinout for byte-wide memories, compatible with industry standard RAMs. The X28HC64 supports a 64-byte page write operation, effectively providing a 32μs/byte write cycle, and enabling the entire memory to be typically written in 0. 25 seconds. The X28HC64 also features DATA Polling and Toggle Bit Polling, two methods providing early end of write detection. In addition, the X28HC64 includes a user-optional software data protection mode that further enhances Intersil’s hardware write protect capability. Intersil EEPROMs are designed and tested for applications requiring extended endurance. Inherent data retention is greater than 100 years.
Parameters
| Attributes | Value |
|---|---|
| Interface | Parallel |
| Memory Capacity (kbit) | 64 |
| Access Time (ns) | 70, 90, 120 |
| Supply Voltage (V) | 4.5 - 5.5 |
Application Block Diagrams
 | Humanoid Battery Management System Integrated humanoid robot BMS enabling safe, real-time power management, protection, and battery-state control. |
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| Part Number | Status | Samples | Stock | RoHS | Package | Budgetary Price (USD) | Carrier Type | Moisture Sensitivity Level (MSL) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|
| X28HC64JIZ-12 | Active | Available | In Stock | RoHS:EN | PLCC | 1ku | $37.04 | Tube | 3 | PHILIPPINES, USA | USA |
| X28HC64JIZ-12T1 | Active | N/A | Out of Stock | RoHS:EN | PLCC | 1ku | $37.04 | Reel | 3 | PHILIPPINES, USA | USA |
| X28HC64JIZ-90T1 | Active | N/A | In Stock | RoHS:EN | PLCC | 1ku | $37.04 | Reel | 3 | PHILIPPINES, USA | USA |
| X28HC64SIZ-12 | Active | Available | In Stock | RoHS:EN | SOICW | 1ku | $33.26 | Tube | 3 | THAILAND, USA | USA |
| X28HC64SIZ-12T1 | Active | N/A | Out of Stock | RoHS:EN | SOICW | 1ku | $33.26 | Reel | 3 | THAILAND, USA | USA |
| X28HC64SZ-12 | Active | Available | In Stock | RoHS:EN | SOICW | 1ku | $33.26 | Tube | 3 | THAILAND, USA | USA |
| X28HC64W | Active | N/A | Out of Stock | RoHS:EN RoHS:JA | Package | |||||
| X28HC64JIZ-70 | Obsolete | N/A | Out of Stock | RoHS:EN | PLCC | Tube | 3 | |||
| X28HC64JIZ-70T1 | Obsolete | N/A | Out of Stock | RoHS:EN | PLCC | Reel | 3 | |||
| X28HC64JIZ-90 | Obsolete | N/A | Out of Stock | RoHS:EN | PLCC | Tube | 3 | |||
| X28HC64JZ-12 | Obsolete | N/A | Out of Stock | RoHS:EN | PLCC | Tube | 3 | |||
| X28HC64JZ-12T1 | Obsolete | N/A | In Stock | RoHS:EN | PLCC | Reel | 3 | |||
| X28HC64JZ-70 | Obsolete | N/A | Out of Stock | RoHS:EN | PLCC | Tube | 3 | |||
| X28HC64JZ-70T1 | Obsolete | N/A | Out of Stock | RoHS:EN | PLCC | Reel | 3 | |||
| X28HC64PIZ-12 | Obsolete | N/A | Out of Stock | RoHS:EN | PDIP | 1ku | $29.45 | Tube | Not Applicable | PHILIPPINES, USA, TAIWAN | USA |
| X28HC64PIZ-90 | Obsolete | N/A | Out of Stock | RoHS:EN | PDIP | Tube | Not Applicable | |||
| X28HC64PZ-12 | Obsolete | N/A | Out of Stock | RoHS:EN | PDIP | 1ku | $29.45 | Tube | Not Applicable | PHILIPPINES, USA, TAIWAN | USA |
| X28HC64PZ-90 | Obsolete | N/A | Out of Stock | Contact | PDIP | Tube | Not Applicable | |||
| X28HC64SIZ-70 | Obsolete | N/A | Out of Stock | RoHS:EN | SOICW | Tube | 3 | |||
| X28HC64SZ-70 | Obsolete | N/A | In Stock | RoHS:EN | SOICW | Tube | 3 |
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- Application NoteAI-generated Summary: The software controls clock synchronous communication using the 3-wire serial I/O (CSI mode) of the RL78 microcontroller's serial array unit as a single master. It supports MSB-first transfer and CPU-driven data transfer but lacks chip-select control and DMA or interrupt-driven transfer. The software operates under specified conditions with RL78/G14 and Renesas R1EX25xxx SPI EEPROM, using CS+ development environments and standard compiler settings.Related Files:
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Knowledge Base
-
Can I connect anything to the NC pins on the X28HC64?
Question:Are the NC pins on the X28HC64 truly no connect pins? In the future I may want to change to the X28HC256 and for this reason I want to connect my CPU-A13 and CPU-A14 to these NC pins. Is there a problem? Answer:I looked at the ...
-
Do you have a replacement for the X2816?
Question: Do you offer a replacement for the obsolete X2816 device? Answer: The X2816 can be functionally replaced by the X28HC64 family of parts.
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