The CascadeTeq CSS6404SU-L is a 64Mb pseudo-static RAM (pSRAM) utilizing a QSPI (Quad SPI) interface. This chip combines the high-speed access characteristics of SRAM with the high-density advantages of DRAM, while simplifying design through its serial interface. It is particularly well-suited for applications requiring substantial buffer memory and sensitivity to space and power consumption.
Core Specifications:
Parameter | Specification |
Model Number | CSS6404SU-L |
Memory Type | QSPI pSRAM |
Storage Density | 64 Mb (8 MB) |
Internal Organization | 8M × 8 |
Interface Type | QSPI (Quad SPI) |
Maximum Clock Frequency | 133 MHz |
Operating Voltage | 2.7V - 3.6V |
Package Form | Compact package (e.g., USON-8L, size 3×2mm) |
Temperature Range | -40°C to +85°C (Industrial Grade) |
1. Core Features and Advantages
The core value of the CSS6404SU-L lies in its high-bandwidth, low-pin-count memory expansion achieved through the high-speed QSPI interface. Its 133MHz clock frequency enables high-speed data transmission in four-wire mode, meeting the high-speed data caching requirements of modern main control chips while significantly saving valuable MCU pins and PCB layout space.
Compared to traditional parallel SRAM or DRAM, its advantages are significant:
l Simple Interface: Requires only a few signal lines for high-speed data exchange, greatly simplifying routing complexity.
l Pseudo-Static Characteristic: Internally handles refresh operations automatically, appearing to the controller like a standard static SRAM, eliminating the need for an external refresh controller and reducing software complexity.
l Low Power Consumption: Its low operating voltage and low standby current help reduce overall system power consumption, making it suitable for battery-powered portable devices.
2. Typical Application Scenarios
Based on its high bandwidth, small package, and low power consumption, this chip is an ideal choice for the following applications:
l IoT Devices: Serves as a data buffer for Wi-Fi/Bluetooth co-processors, handling network data packets, meeting the dual demands for memory and size in smart home and wearable devices.
l Portable Electronic Devices: Suitable for devices like smartwatches and AR/VR glasses, where its small package and low power consumption help extend battery life.
l Industrial Control Systems: In high-speed data acquisition buffering scenarios, its high-speed transmission capability meets the real-time data processing requirements of industrial control.
3. Differential Advantages Compared to Traditional Solutions
Comparison Dimension | Traditional SRAM/DRAM | CSS6404SU-L QSPI pSRAM | Core Value for the System |
Interface Pins | Parallel interface, high pin count | QSPI serial interface, significantly fewer pins | Simplifies PCB layout, reduces design complexity, suitable for highly integrated, compact designs |
Capacity & Cost | High cost for large-capacity SRAM | Significant ost-performance advantage at similar densities | Achieves large-capacity caching at a better cost, enhancing product market competitiveness |
Power Management | Requires external controller for refresh, higher power consumption | Self-refresh mechanism, low standby power | Extends battery life for powered devices, more suitable for power-sensitive applications |
Ease of Use | Complex interface, requires timing matching | Plug-and-play, controllable via standard SPI protocol | Accelerates development cycles, lowers the integration barrier for both software and hardware engineers |
In summary, the CascadeTeq CSS6404SU-L is a highly competitive and cost-effective QSPI pSRAM solution. It successfully achieves an excellent balance between performance (high-speed bandwidth), size (small package), and ease of use (simplified serial interface), providing an efficient "memory expansion" solution for various embedded applications requiring additional high-speed cache.
About Mandu Technology
Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.
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