Datasheet
78M6612
Single-Phase, Dual-Outlet
Power and Energy Measurement IC
DATA SHEET
DS_6612_001
Rev 2 1
19-5348; Rev 2; 1/12
DESCRIPTION
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.
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, I
2
C/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.
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.
MPU
RTC
TIMERS
IA
VA
IB
XIN
XOUT
VREF
V1
TX0
RX0
COM0..3
V3.3A
V3.3
SYS
VBAT
V2.5
VBIAS
SEG0..18
GNDA
GNDD
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
ICE
I
2
C or µWire
EEPROM
POWER
FAULT
COMPARATOR
SERIAL PORTS
OSC/PLL
CONVERTER
DIO, PULSE
COMPUTE
ENGINE
FLASH
RAM
VOLTAGE REF
REGULATOR
POWER SUPPLY
TERIDIAN
78M6612
TEMP
SENSOR
32 kHz
LIVE
NEUT
CT
VB
PWR MODE
CONTROL
WAKE-UP
BATTERY
ICE_E
GNDD
V3P3D
SEG 32,33,
38/ICE
TX1
RX1
OPTIONAL
OUTLET
OPTIONAL
FEATURES
• Measures Each Outlet of a Duplex Receptacle with
a Single IC
• 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)
• 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)
LCD Mode (5.7 µA)
Sleep Mode (2.9 µA)
• Energy Display on Main Power Failure
• Wake-Up Timer
• 22-Bit Delta-Sigma ADC
• 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
• 32 KB Flash with Security
• 2 KB MPU XRAM
• Two UARTs
• 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
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.