25LC640-I/P vs CY7C25652KV18-500BZC
| Part Number |
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| Category | General Memory | General Memory |
| Manufacturer | Microchip Technology | Cypress Semiconductor Corp |
| Description | IC EEPROM 64KBIT SPI 2MHZ 8DIP | NO WARRANTY |
| Package | Cut Tape (CT) | Cut Tape (CT) |
| Series | - | - |
| Voltage - Supply | 2.5V ~ 5.5V | 1.7V ~ 1.9V |
| Operating Temperature | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole | Surface Mount |
| Package / Case | 8-DIP (0.300\", 7.62mm) | 165-LBGA |
| Supplier Device Package | 8-PDIP | 165-FBGA (13x15) |
| Memory Size | 64Kb (8K x 8) | 72Mb (2M x 36) |
| Technology | EEPROM | SRAM - Synchronous, QDR II+ |
| Memory Type | Non-Volatile | Volatile |
| Clock Frequency | 2 MHz | 500 MHz |
| Access Time | - | - |
| Memory Format | EEPROM | SRAM |
| Write Cycle Time - Word, Page | 5ms | - |
| Memory Interface | SPI | Parallel |
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1. Is there a relationship between the capacity and speed of memory?
The capacity and speed of memory are not directly related. The capacity refers to the amount of data that the memory can hold, while the speed determines the speed at which the memory reads and writes data. Generally speaking, faster memory such as RAM has a smaller capacity, while large-capacity storage such as HDD is relatively slow.
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2. What are volatile and non-volatile memory?
Volatile memory loses data when power is off, such as RAM; non-volatile memory retains data after power is off, such as ROM and flash memory.
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3. What is the difference between cache and RAM?
Cache is a high-speed memory between the CPU and the main memory, which is used to temporarily store data and instructions commonly used by the CPU to speed up the system. RAM is the main storage of the system, which is used to store data for applications and operating systems.
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4. How to upgrade the computer's memory?
Computer storage performance can usually be improved by adding RAM modules or upgrading the HDD to a faster SSD. It is also necessary to ensure that the new hardware is compatible with the system, especially motherboard support and memory type.
