71M6541D/F/G and 71M6542F/G meter IC data sheet, are the 4th generation of high-integrated single-phase meter SoCs, including: 8051 compatible MPU, low-power real-time clock (RTC) with digital compensation, flash memory and LCD driver. Adopting our Single Converter Technology® , embedded with one 22-bit Σ-Δ ADC digital temperature sensor, three or four analog inputs, digital temperature compensation, precision voltage reference and 32-bit computing engine (CE), only a few external components can support various meter designs.
The Maxim 71M6541D/F/G and 71M6542F/G series are fourth‑generation, high‑integration single‑phase smart‑grid ICs that combine an 8051‑compatible MPU, low‑power RTC, LCD driver and multiple analog front‑end functions. They support SPI, UART and other interfaces, offering configurable power modes and on‑chip memory.
The document provides detailed functional descriptions, pin configurations for 64‑pin and 100‑pin LQFP packages, memory maps, register tables, timing diagrams and revision history, enabling designers to integrate the devices into smart‑meter and grid applications. This manual is written in Japanese.
| Accuracy | 2000:1, 0.1 % error |
|---|---|
| Flash Memory (71M6541D) | 32 KB |
| RAM (71M6541D) | 3 KB |
| Flash Memory (71M6541F/71M6542F) | 64 KB |
| RAM (71M6541F/71M6542F) | 5 KB |
| Flash Memory (71M6541G/71M6542G) | 128 KB |
| Interface | SPI, UART, I2C, differential CT inputs |
The devices support SPI, UART, and I2C interfaces, as well as differential current transformer (CT) inputs.
The IC provides a measurement accuracy of 2000:1, corresponding to 0.1 % error.