19-5376; Rev 2; 11/11
71M6541D/F/G and 71M6542F/G
Energy Meter ICs
DATA SHEET
GENERAL DESCRIPTION
FEATURES
The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are
Teridian™ 4th-generation single-phase metering SoCs with a 5MHz
8051-compatible MPU core, low-power RTC with digital temperature
compensation, flash memory, and LCD driver. Our Single Converter
Technology® with a 22-bit delta-sigma ADC, three or four analog
inputs, digital 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
• Two Current Sensor Inputs with Selectable
Differential Mode
• Selectable Gain of 1 or 8 for One Current Input to
Support Shunts
• High-Speed Wh/VARh Pulse Outputs with
Programmable Width
The 71M6541/2 devices support optional interfaces to the Teridian
71M6x01 series of isolated sensors, which offer BOM cost reduction,
immunity to magnetic tamper, and enhanced reliability. Other
features include an SPI interface, advanced power management,
ultra-low-power operation in active and battery modes, 3/5KB shared
RAM and 32/64/128KB of flash memory that can be programmed in
the field with code and/or data during meter operation and the ability
to drive up to six LCD segments per SEG driver pin. High
processing and sampling rates combined with differential inputs offer
a powerful metering platform for residential meters.
• 32KB Flash, 3KB RAM (71M6541D)
• 64KB Flash, 5KB RAM (71M6541F/42F)
• 128KB Flash, 5KB RAM (71M6541G/42G)
• Up to Four Pulse Outputs with Pulse Count
• Four-Quadrant Metering
• 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
Shunt
NEUTRAL
• Phase Compensation (±10°)
• Three Battery-Backup Modes:
LOAD
Note:
Shunt
LINE
This system is referenced to LINE
-
-
-
Brownout Mode (BRN)
LCD Mode (LCD)
Sleep Mode (SLP)
NEUTRAL
POWER SUPPLY
LINE
• Wake-Up on Pin Events and Wake-On Timer
TERIDIAN
71M6xx1
• 1µA in Sleep Mode
MUX and ADC
V3P3A V3P3SYS
GNDA GNDD
• Flash Security
PWR MODE
CONTROL
IAP
IAN
• In-System Program Update
• 8-Bit MPU (80515), Up to 5 MIPS
• Full-Speed MPU Clock in Brownout Mode
• LCD Driver:
WAKE-UP
Pulse
Trans-
former
TERIDIAN
71M6541D/F
REGULATOR
BATTERY
VBAT
VA
VBAT_RTC
RTC
BATTERY
BATTERY
MONITOR
IBP
IBN
TEMPERATURE
SENSOR
VREF
RAM
COM0...5
SEG
LCD DISPLAY
- Up to 6 Commons/Up to 56 Pins
• 5V LCD Driver with DAC
SERIAL PORTS
COMPUTE
ENGINE
8888.8888
TX
RX
SEG/DIO
AMR
IR
LCD DRIVER
DIO, PULSES
FLASH
MEMORY
PULSES,
DIO
DIO
• 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
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
11/5/2010
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.
• 64-Pin (71M6541D/F/G) and 100-pin
(71M6542F/G) Lead(Pb)-Free LQFP Package
Rev 2
1
5秒后页面跳转
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