19-5348; Rev 2; 1/12
78M6612
Single-Phase, Dual-Outlet
Power and Energy Measurement IC
DATA SHEET
DS_6612_001
FEATURES
DESCRIPTION
• Measures Each Outlet of a Duplex Receptacle with
a Single IC
The Teridian™ 78M6612 is a highly integrated, single-phase,
power and energy measurement and monitoring system-on-
chip (SoC) that includes a 32-bit compute engine (CE), an
MPU core, RTC, and flash. Our Single Converter
Technology® with a 22-bit delta-sigma ADC, four analog
inputs, digital temperature compensation, and precision
voltage reference supports a wide range of single-phase,
dual-outlet power measurement applications with very few
external components.
• Provides Complete Energy Measurement and
Communication Protocol Capability in a Single IC
• Intelligent Switch Control Capability
• < 0.5% Wh Accuracy Over 2000:1 Current Range
and Over Temperature
• Exceeds IEC 62053/ANSIC12.20 Standards
• Voltage Reference < 40 ppm/°C
• Four Sensor Inputs – VDD Referenced
• Low Jitter Wh and VARh Pulse Test Outputs
(10 kHz max)
With measurement technology leveraged from Maxim’s flagship
utility metering ICs, the device offers features including 32 KB
of flash program memory, 2 KB shared RAM, three low-power
modes with internal timer or external event wake-up, two
UARTs, I2C/MICROWIRE® EEPROM I/F, and an in-system
programmable flash. Complete outlet measurement unit (OMU)
and AC power monitor (AC-PMON) firmware is available or can
be preloaded into the IC.
• Pulse Count for Pulse Outputs
• Line Frequency Count for RTC
• Digital Temperature Compensation
• Sag Detection for Phase A and B
• Independent 32-Bit Compute Engine
• 46-64 Hz Line Frequency Range with Same Calibration
• Phase Compensation (±7°)
• Battery Backup for RTC and Battery Monitor
• Three Battery Modes with Wake-Up Timer:
Brownout Mode (48 µA)
A complete array of ICE and development tools, programming
libraries and reference designs enable rapid development and
certification of power and energy measurement solutions that
meet the most demanding worldwide electricity metering
standards.
CT
LIVE
LCD Mode (5.7 µA)
OUTLET
Sleep Mode (2.9 µA)
POWER SUPPLY
NEUT
• Energy Display on Main Power Failure
• Wake-Up Timer
• 22-Bit Delta-Sigma ADC
CONVERTER
IA
V3.3
SYS
V3.3A
GNDA GNDD
• 8-Bit MPU (80515), 1 Clock Cycle per Instruction
with Integrated ICE for MPU Debug
• RTC with Temperature Compensation
• Auto-Calibration
• Hardware watchdog Timer, Power-Fail Monitor
• LCD Driver (Up to 152 Pixels)
• Up to 18 General-Purpose I/O Pins
• 32 kHz Time Base
PWR MODE
CONTROL
OPTIONAL
BATTERY
VA
IB
TERIDIAN
78M6612
WAKE-UP
VB
REGULATOR
VBAT
V2.5
VOLTAGE REF
TEMP
SENSOR
DIO, PULSE
VREF
VBIAS
RAM
COM0..3
SERIAL PORTS
SEG0..18
SEG 24..31/
DIO 4..11
FLASH
TX0
RX0
OPTIONAL
SEG 34..37/
DIO 14..17
I2 C or µWire
EEPROM
COMPUTE
ENGINE
RX1
• 32 KB Flash with Security
• 2 KB MPU XRAM
TX1
SEG 32,33,
38/ICE
COMPARATOR
MPU
RTC
POWER
FAULT
V1
TIMERS
• Two UARTs
OSC/PLL
XIN
V3P3D
GNDD
32 kHz
ICE_E
• Digital I/O Pins Compatible with 5 V Inputs
• 64-Pin LQFP or 68-Pin QFN Package
• RoHS-Compliant (6/6) Lead(Pb)-Free Packages
• Complete Application Firmware Available
ICE
XOUT
Teridian is a trademark and Single Converter Technology is a registered
trademark of Maxim Integrated Products, Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
Rev 2
1