hm5257165b Datasheet - Analogdevices
The HM5257165B is a 256K x 16-bit dynamic RAM chip, organized as 262,144 words by 16 bits.
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📝 Component Overview
The HM5257165B is a 256K x 16-bit dynamic RAM chip, organized as 262,144 words by 16 bits. It is designed for use in a wide range of applications, including computer main memory, cache memory, and image or video processing systems. The device operates from a single 5V power supply and has a low power consumption, making it suitable for battery-powered systems. The HM5257165B has a page mode operation capability, which allows for high-speed data transfer. It also features a self-refresh mode, which reduces power consumption during idle periods.
Key Features and Benefits
- 256K x 16-bit dynamic RAM
- Single 5V power supply
- Low power consumption
- Page mode operation capability
- Self-refresh mode
- High-speed data transfer
- Suitable for computer main memory, cache memory, and image or video processing systems
Typical Applications
- Computer main memory
- Cache memory
- Image processing systems
- Video processing systems
- Battery-powered systems
- Embedded systems
- Industrial control systems
- Medical devices
📊 Complete Technical Specifications
Absolute Maximum Ratings
| Parameter | Value |
|---|---|
| Power Supply Voltage | 5.5V |
| Operating Temperature | -20 to 70°C |
| Storage Temperature | -40 to 85°C |
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Access Time | At 5V power supply | 60ns | 70ns | 80ns | ns |
| Cycle Time | At 5V power supply | 120ns | 130ns | 140ns | ns |
Package Information
- 32-pin DIP: Dual in-line package with 32 pins
- 32-pin PLCC: Plastic leaded chip carrier with 32 pins
Pin Configuration
- Pin 1: VCC - Power supply voltage
- Pin 2: GND - Ground
🔧 Application Guidelines
Design Considerations
When designing with the HM5257165B, it is essential to consider the power supply voltage, operating temperature, and storage temperature. The device should be operated within the specified absolute maximum ratings to ensure reliable operation. Additionally, the system designer should consider the access time, cycle time, and refresh requirements to ensure proper operation.
Installation Guidelines
The HM5257165B should be handled with care to prevent damage from static electricity. The device should be mounted on a printed circuit board with the recommended soldering temperature and time. The system designer should also ensure that the device is properly connected to the power supply, ground, and signal lines.
Operational Notes
The HM5257165B has a self-refresh mode that reduces power consumption during idle periods. However, the system designer should ensure that the device is properly refreshed to prevent data loss. The device also has a page mode operation capability, which allows for high-speed data transfer. The system designer should consider the access time, cycle time, and refresh requirements to ensure proper operation.