SST39VF040-70-4I-WHE-T vs AS4C4M16SA-5TCNTR
| Part Number |
|
|
| Category | General Memory | General Memory |
| Manufacturer | Microchip Technology | Alliance Memory, Inc. |
| Description | IC FLASH 4MBIT PARALLEL 32TSOP | IC DRAM 64MBIT PAR 54TSOP II |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | SST39 MPF™ | - |
| Voltage - Supply | 2.7V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 32-TFSOP (0.488\", 12.40mm Width) | 54-TSOP (0.400\", 10.16mm Width) |
| Supplier Device Package | 32-TSOP | 54-TSOP II |
| Memory Size | 4Mb (512K x 8) | 64Mb (4M x 16) |
| Technology | FLASH | SDRAM |
| Memory Type | Non-Volatile | Volatile |
| Clock Frequency | - | 200 MHz |
| Access Time | 70 ns | 4.5 ns |
| Memory Format | FLASH | DRAM |
| Write Cycle Time - Word, Page | 20µs | 2ns |
| Memory Interface | Parallel | Parallel |
-
1. What is memory and what does it do?
Memory is a computer component that stores data and instructions. It can be temporary (volatile storage) or permanent (non-volatile storage) and is used to support system operation and data storage.
-
2. What is flash memory and what are the common types of flash memory?
Flash memory is a non-volatile memory used to store data, and the data will not be lost even if the device is powered off. Common types are NAND and NOR flash memory, which are mainly used in USB flash drives, SSDs, memory cards, etc.
-
3. 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.
-
4. How to measure the data read and write speed of memory?
The read and write speed of memory is usually expressed in MB/s or GB/s, reflecting the amount of data it processes per second. The faster the speed, the higher the data transmission efficiency.
