AS4C128M8D3B-12BIN vs AT28C256F-15SU-T
| Part Number |
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| Category | General Memory | General Memory |
| Manufacturer | Alliance Memory, Inc. | Microchip Technology |
| Description | IC DRAM 1GBIT PARALLEL 78FBGA | IC EEPROM 256KBIT PAR 28SOIC |
| Package | Bulk | Tape & Reel (TR) |
| Series | - | - |
| Voltage - Supply | 1.425V ~ 1.575V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 95°C (TC) | -40°C ~ 85°C (TC) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 78-VFBGA | 28-SOIC (0.295\", 7.50mm Width) |
| Supplier Device Package | 78-FBGA (8x10.5) | 28-SOIC |
| Memory Size | 1Gb (128M x 8) | 256Kb (32K x 8) |
| Technology | SDRAM - DDR3 | EEPROM |
| Memory Type | Volatile | Non-Volatile |
| Clock Frequency | 800 MHz | - |
| Access Time | 20 ns | 150 ns |
| Memory Format | DRAM | EEPROM |
| Write Cycle Time - Word, Page | 15ns | 3ms |
| Memory Interface | Parallel | Parallel |
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1. What are the main types of memory?
Common memory types include random access memory (RAM), read-only memory (ROM), flash memory, hard disk drive (HDD), and solid-state drive (SSD).
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2. How to choose the right memory type?
When choosing a memory type, you need to consider speed, capacity, durability and cost according to application requirements. For example, SSD is suitable for data that needs to be accessed quickly, HDD is suitable for large-capacity data storage, and RAM is suitable for high-speed computing.
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3. What is SSD and how to distinguish it from HDD?
SSD (Solid State Drive) is a non-volatile storage device that stores data through flash memory. It has faster read and write speeds than HDD (Hard Disk Drive), no mechanical structure, and long life, but the price is relatively higher.
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4. What is ECC memory?
ECC (error correction code) memory detects and corrects single-bit errors in stored data, improving the reliability of memory and is commonly used in servers and data centers.
