SST39VF010-70-4I-NHE vs PCF8594C-2T/02,112
| Part Number |
|
|
| Category | General Memory | General Memory |
| Manufacturer | Microchip Technology | NXP USA Inc. |
| Description | IC FLASH 1MBIT PARALLEL 32PLCC | IC EEPROM 4KBIT I2C 100KHZ 8SO |
| Package | Tube | Tube |
| Series | SST39 MPF™ | - |
| Voltage - Supply | 2.7V ~ 3.6V | 2.5V ~ 6.0V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 32-LCC (J-Lead) | 8-SOIC (0.154\", 3.90mm Width) |
| Supplier Device Package | 32-PLCC (11.43x13.97) | 8-SO |
| Memory Size | 1Mb (128K x 8) | 4Kb (512 x 8) |
| Technology | FLASH | EEPROM |
| Memory Type | Non-Volatile | Non-Volatile |
| Clock Frequency | - | 100 kHz |
| Access Time | 70 ns | - |
| Memory Format | FLASH | EEPROM |
| Write Cycle Time - Word, Page | 20µs | - |
| Memory Interface | Parallel | I²C |
-
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).
-
2. 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.
-
3. What is the difference between SRAM and DRAM?
SRAM (static RAM) does not require periodic refreshes and is faster but more expensive; DRAM (dynamic RAM) requires periodic refreshes and has a higher storage density and is suitable for main memory.
-
4. What is virtual memory and how does it work?
Virtual memory is a technology that uses hard disk space as memory, allowing the system to use hard disk space to expand memory when physical RAM is insufficient, improving the system's multitasking capabilities.
