The 78M6618 is a highly integrated IC from Teridian Semiconductor Corporation for independent monitoring and measurement of up to eight single-phase AC outlets. The device has multiple host interface options, an integrated LCD driver, and configurable I/O, making it ideal for metered power distribution units (PDUs) and rack enclosures for the data center, as well as intelligent power strips and subpanels in the grid-friendly digital home.
The Teridian 78M6618 integrates analog front‑end, a 32‑bit compute engine, and an 8‑bit 80515 microcontroller to provide independent monitoring of up to eight single‑phase AC outlets. It offers 10 sensor inputs, UART and SPI host interfaces, LCD driver support, and up to 19 general‑purpose I/Os, making it suitable for power distribution units, intelligent power strips, and sub‑panels.
The device features a 21‑bit delta‑sigma ADC, a precision voltage reference (< 40 ppm/°C), 128 KB flash, 4 KB XRAM, and built‑in temperature compensation. Power management includes voltage regulation, brown‑out, and sleep modes, while the on‑chip MCU can be programmed via ICE or loaded with reference firmware from Teridian.
| Accuracy | < 0.5% Wh over 2000:1 dynamic range |
|---|---|
| Voltage Reference Temperature Coefficient | < 40 ppm/°C |
| ADC Resolution | 21‑bit Delta‑Sigma |
| Flash Memory | 128 KB (with security) |
| Analog Sensor Inputs | 10 inputs, 3.3 V referenced |
| General‑Purpose I/Os | Up to 19 pins, 5 V tolerant |
| Package | 68‑Pin QFN, RoHS‑compliant |
It delivers better than 0.5 % Wh accuracy over a 2000:1 dynamic range.
The IC supports ten sensor inputs referenced to 3.3 V.
It provides a UART interface and a high‑speed SPI slave interface.