19-5375; Rev 1.2; 4/11
71M6543F/H and 71M6543G/GH
Energy Meter ICs
DATA SHEET
April 2011
GENERAL DESCRIPTION
FEATURES
The 71M6543F, 71M6543H, 71M6543G, and 71M6543GH are
Teridian’s 4th-generation polyphase metering systems-on-chips
(SoCs) with a 5MHz 8051-compatible MPU core, low-power real-
time clock (RTC) with digital temperature compensation, flash
memory, and LCD driver. Our Single Converter Technology® with
a 22-bit delta-sigma ADC, seven analog inputs, digital metrology
temperature compensation, precision voltage reference, and a 32-
bit computation engine (CE) supports a wide range of metering
applications with very few external components.
• 0.1% Accuracy Over 2000:1 Current Range
• Exceeds IEC 62053/ANSI C12.20 Standards
• Seven Sensor Inputs with Neutral Current
Measurement, Differential Mode Selectable
for Current Inputs
• Selectable Gain of 1 or 8 for One Current
Input to Support Shunts
• High-Speed Wh/VARh Pulse Outputs with
Programmable Width
The 71M6543F, 71M6543H, 71M6543G and 71M6543GH support
optional interfaces to the 71M6xx3 series of isolated sensors that
offer BOM cost reduction, immunity to magnetic tamper, and
enhanced reliability. The ICs feature ultra-low-power operation in
active and battery modes, 5KB shared RAM, and 64KB
(71M6543F, 71M6543H) or 128KB (71M6543G, 71M6543GH) of
flash memory, which can be programmed with code and/or data
during meter operation. High processing and sampling rates
combined with differential inputs offer a powerful metering platform
for commercial and industrial meters with up to class 0.2 accuracy
(71M6543H, 71M6543GH).
• 64KB Flash, 5KB RAM (71M6543F/H)
• 128KB Flash, 5KB RAM (71M6543G/GH)
• Up to Four Pulse Outputs with Pulse Count
• Four-Quadrant Metering, Phase Sequencing
• Digital Temperature Compensation:
Metrology Compensation
Accurate RTC for TOU Functions with
Automatic Temperature Compensation
for Crystal in All Power Modes
A complete array of code development tools, demonstration code,
and reference designs enable rapid development and certification of
meters that meet all ANSI and IEC electricity metering standards
worldwide.
• Independent 32-Bit Compute Engine
• 46-64Hz Line Frequency Range with the Same
Calibration
• Phase Compensation (±7°)
Shunt Current Sensors
C
NEUTRAL
LOAD
• Three Battery-Backup Modes:
B
A
Brownout Mode
LCD Mode
Sleep Mode
POWER SUPPLY
• Wake-Up on Pin Events and Wake-on-Timer
• 1µA in Sleep Mode
• Flash Security
NEUTRAL
Note: This system is referenced to Neutral
3x TERIDIAN
71M6xx3
• In-System Program Update
• 8-Bit MPU (80515), Up to 5MIPS
• Full-Speed MPU Clock in Brownout Mode
• LCD Driver:
MUX and ADC
V3P3A V3P3SYS
GNDA GNDD
Pulse Transformers
IADC0
IADC1
}IN*
PWR MODE
CONTROL
TERIDIAN
71M6543F/
71M6543H/
71M6543G/
71M6543GH
VADC10 (VC)
IADC6
}IC
WAKE-UP
IADC7
REGULATOR
VADC9 (VB)
IADC4
BATTERY
}IB
VBAT
IADC5
VBAT_RTC
VADC8 (VA)
IADC2
RTC
BATTERY
BATTERY
MONITOR
6 Common Segment Drivers
TEMPERATURE
SENSOR
}IA
IADC3
Up to 56 Selectable Pins
VREF
RAM
COM0...5
SEG
LCD DISPLAY
SERIAL PORTS
• Up to 51 Multifunction DIO Pins
• Hardware Watchdog Timer (WDT)
• I2C/MICROWIRE™ EEPROM Interface
• SPI Interface with Flash Program Capability
• Two UARTs for IR and AMR
• IR LED Driver with Modulation
• Industrial Temperature Range
• 100-Pin Lead-Free LQFP Package
COMPUTE
ENGINE
8888.8888
TX
RX
SEG/DIO
AMR
IR
LCD DRIVER
DIO, PULSES
FLASH
MEMORY
PULSES,
DIO
DIO
MODUL-
RX
ATOR
TX
I2C or µWire
EEPROM
POWER FAULT
COMPARATOR
MPU
RTC
TIMERS
V3P3D
OSCILLATOR/
PLL
XIN
SPI INTERFACE
32 kHz
HOST
ICE
XOUT
*IN = Neutral Current
9/17/2010
Single Converter Technology is a registered trademark of Maxim Integrated
Products, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
