[1] UNISOC SL8541E Brief Datasheet, Rev 1.2, 2021. [2] ARM Cortex-A53 Technical Reference Manual. [3] Android Go Performance Analysis on Legacy SoCs, IEEE Embedded Systems Letters, 2023.
The SL8541E is a 28 nm ARM-based SoC from UNISOC (formerly Spreadtrum), targeting low-cost smartwatches, POS terminals, and industrial handhelds. It integrates a (max 1.2 GHz), a Mali-T820 MP1 GPU , and a LTE Cat 4 modem . This paper analyzes its real-world performance, thermal behavior, and power efficiency relative to competing SoCs (e.g., Qualcomm Wear 2500, MediaTek MT6739). spreadtrum sl8541e
The standout feature of the SL8541E is its integration. By combining the CPU, GPU, and an into a single chip, UNISOC enables manufacturers to reduce the physical footprint and complexity of their device internals. The modem supports VoLTE (Voice over LTE), which is critical as global carriers phase out older 2G and 3G networks. [1] UNISOC SL8541E Brief Datasheet, Rev 1
The Spreadtrum SL8541E is designed to power a wide range of mobile devices, including: The SL8541E is a 28 nm ARM-based SoC
The SL8541E features technology. In standby mode (deep sleep), the chip draws less than 1mA of current. In an active voice call, it consumes ~300mA.
| | Description | | --- | --- | | CPU | Quad-core ARM Cortex-A7, up to 1.3 GHz | | GPU | Mali-400MP2 | | Process | 28nm | | LTE Support | Cat 4, download speeds up to 150 Mbps, upload speeds up to 50 Mbps | | HSPA+ Support | Download speeds up to 42.2 Mbps, upload speeds up to 5.76 Mbps | | Wi-Fi | IEEE 802.11 b/g/n | | Bluetooth | Version 4.0 | | GPS | Built-in GPS receiver | | Memory | Support for up to 2GB of LPDDR2/3 RAM, up to 32GB of eMMC 5.0 storage |
Unisoc provides the "ResearchDownload" tool for flashing firmware. The bootloader is typically unlocked on development boards, making the SL8541E a favorite for hobbyists building DIY 4G Linux phones (like the PinePhone Lite variants).