HM62256ALP-70G High Speed CMOS Static RAM Memory IC 8-Bit DIP-28
HM62256ALP-70G High Speed CMOS Static RAM Memory IC 8-Bit DIP-28 is a high-performance 256K-bit CMOS static RAM organized as 32,768 words by 8 bits. Designed for fast data access with a maximum access time of 70ns, this memory IC offers low power consumption and direct TTL compatibility. Housed in a standard DIP-28 package, it is ideal for microprocessor-based systems, industrial controllers, embedded applications, data buffering, and memory expansion projects. The device features fully static operation, eliminating the need for refresh cycles and ensuring reliable data retention while powered.
Features
- High-speed 70ns access time for fast memory operations.
- 32K × 8-bit organization providing 256K-bit storage capacity.
- Low power CMOS technology.
- Fully static operation with no refresh required.
- Direct TTL compatible inputs and outputs.
- Standard DIP-28 package for easy prototyping.
- Low standby current consumption.
- Reliable data retention during operation.
- Suitable for embedded and industrial applications.
- Simple interface with microprocessors and microcontrollers.
Specifications
| Parameter | Details |
| Model Number | HM62256ALP-70G |
| Memory Type | CMOS Static RAM |
| Memory Organization | 32K × 8 Bits |
| Memory Capacity | 256Kbit |
| Access Time | 70nsec |
| Supply Voltage | 4.5V to 5.5V |
| Nominal Supply Voltage | 5V |
| Data Bus Width | 8 Bits |
| Address Inputs | 15 |
| Operating Mode | Fully Static |
| Input Compatibility | TTL Compatible |
| Output Configuration | Three-State Outputs |
| Standby Current (Typical) | 1mA |
| Operating Current | 85mA Maximum |
| Technology | CMOS |
| Package Type | DIP-28 |
| Mounting Type | Through Hole |
| Operating Temperature | 0°C to 70°C |
Dimensions
Pin Configuration
| Pin Number | Pin Name | Function/Description |
|---|---|---|
| 1 | A14 | Address Input Bit 14. |
| 2 | A12 | Address Input Bit 12. |
| 3 | A7 | Address Input Bit 7. |
| 4 | A6 | Address Input Bit 6. |
| 5 | A5 | Address Input Bit 5. |
| 6 | A4 | Address Input Bit 4. |
| 7 | A3 | Address Input Bit 3. |
| 8 | A2 | Address Input Bit 2. |
| 9 | A1 | Address Input Bit 1. |
| 10 | A0 | Address Input Bit 0. |
| 11 | DQ0 | Data Input / Output Bit 0. |
| 12 | DQ1 | Data Input / Output Bit 1. |
| 13 | DQ2 | Data Input / Output Bit 2. |
| 14 | GND | Ground Supply Connection. |
| 15 | DQ3 | Data Input / Output Bit 3. |
| 16 | DQ4 | Data Input / Output Bit 4. |
| 17 | DQ5 | Data Input /Output Bit 5. |
| 18 | DQ6 | Data Input /Output Bit 6. |
| 19 | DQ7 | Data Input /Output Bit 7. |
| 20 | CE̅ | Chip Enable Input (Active Low). |
| 21 | A10 | Address Input Bit 10. |
| 22 | OE̅ | Output Enable Input (Active Low). |
| 23 | A11 | Address Input Bit 11. |
| 24 | A9 | Address Input Bit 9. |
| 25 | A8 | Address Input Bit 8. |
| 26 | A13 | Address Input Bit 13. |
| 27 | WE̅ | Write Enable Input (Active Low). |
| 28 | VCC | Positive Power Supply (+5V). |
Applications
- Microprocessor memory expansion.
- Embedded control systems.
- Industrial automation equipment.
- Data acquisition systems.
- Communication devices.
- Digital instrumentation.
- Buffer memory applications.
- Educational and development boards.
- Legacy computer hardware repairs.
- Custom electronic projects.
Package Contents
- 1 x HM62256ALP-70G High Speed CMOS Static RAM Memory IC 8-Bit DIP-28