71M6521DE, 71M6521FE Product Brief
For Residential Meters, 0.5% Accuracy
Description
The Teridian 71M6521DE/FE is a highly integrated SOC with an MPU core, RTC, FLASH and LCD driver. Teridian’s patented Single Converter Technology
®
with a 22-bit
delta-sigma ADC, four analog inputs, digital temperature compensation, precision voltage reference, battery voltage monitor, and 32-bit computation engine (CE) supports
a wide range of residential metering applications with very few low-cost external components. A 32kHz crystal time base for the entire system and internal battery backup
support for RAM and RTC further reduce system cost. The IC supports 2-wire, 3-wire and 4-wire single-phase and dual-phase residential metering along with tamper-
detection mechanisms.
Maximum design flexibility is provided by multiple UARTs, I
2
C, μWire, up to 18 DIO pins and in-system programmable FLASH memory, which can be updated with data
or application code in operation.
A complete array of ICE and development tools, programming libraries and reference designs enable rapid development and certification of TOU, AMR and Prepay meters
that comply with worldwide electricity metering standards.
KEY FEATURES
KEY FEATURES
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< 0.4% Wh accuracy over 2000:1 current range and over temperature
Exceeds IEC62053 / ANSI C12.20 standards
Voltage reference < 40ppm/°C
Four sensor inputs – VDD referenced
Low jitter Wh and VARh pulse test outputs (10kHz max)
Pulse count for pulse outputs
Four-quadrant metering
Tamper detection – Neutral current with CT or shunt
Line frequency count for RTC
Digital temperature compensation
Sag detection for phase A and B
Independent 32-bit compute engine
46-64Hz line frequency range with same calibration
Phase compensation (±7º)
Battery back-up modes for RTC and battery monitor
Three battery modes w/ wake-up on push-button or timer:
Brownout mode (48uA), LCD mode (5.7uA) and Sleep mode (2.9uA)
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8-bit MPU (80515), 1 clock cycle per instruction w/ integrated
ICE for MPU debug
16KB (6521DE) or 32KB (6521FE) Flash with security
2KB MPU XRAM
Energy display on main power failure
Wake-up with push-button
22-bit delta-sigma ADC
RTC with temperature compensation
Auto-Calibration
Hardware watchdog timer, power fail monitor
LCD driver (upto 152 pixel)
Up to 18 general purpose I/O pins
32kHz time base
Two UARTs for IR and AMR
Digital I/O pins compatible with 5V inputs
64-pin LQFP or 68-pin QFN package
Applications
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Residential meters, 0.5% accuracy
71M6521DE, 71M6521FE Product Brief
71M6521DE, 71M6521FE Block Diagram
A
NEUT
B
LOAD
CT/SHUNT
LOAD
POWER SUPPLY
CONVERTER
IA
VA
IB
VB
V3.3A V3.3
SYS
GNDA GNDD
POWER MODE
CONTROL
WAKE-UP
71M6521
TEMP
SENSOR
RAM
REGULATOR
VBAT
V2.5
DIO, PULSE
COM0..3
SEG0..18
+ -
BATTERY
VOLTAGE REF
VREF
VBIAS
SERIAL PORTS
AMR
RX/DIO1
IR
TX/DIO2
TX
RX
SENSE
DRIVE/MOD
COMPARATOR
V1
XIN
OSC/PLL
3.3V LCD
FLASH/ROM
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
SEG 32,33,
38/ICE
IIC or uWire
EEPROM
COMPUTE
ENGINE
POWER
FAULT
32 kHz
MPU
RTC
TIMERS
TEST PULSES
XOUT
ICE
ICE_E
V3P3D
GNDD
Ordering Information
PART DESCRIPTION
71M6521DE
64-pin LQFP, Lead Free, 16KB Flash,
71M6521DE
64-pin LQFP, Lead Free, 16KB Flash, Tape & Reel
71M6521FE
64-pin LQFP, Lead Free, 32KB Flash,
71M6521FE
64-pin LQFP, Lead Free, 32KB Flash, Tape & Reel
71M6521DE
68-pin QFN, Lead Free, 16KB Flash,
71M6521DE
68-pin QFN, Lead Free, 16KB Flash, Tape & Reel
71M6521FE
68-pin QFN, Lead Free, 32KB Flash,
71M6521FE
68-pin QFN, Lead Free, 32KB Flash, Tape & Reel
ORDERING NUMBER
71M6521DE-IGT/F
71M6521DE-IGTR/F
71M6521FE-IGT/F
71M6521FE-IGTR/F
71M6521DE-IMF
71M6521DE-IMR/F
71M6521FE-IM/F
71M6521FE-IMR/F
For more information about Teridian products and the name of a local representative or distributor,
visit
www.teridian.com
or call +1 714-508-8800
6440 Oak Canyon, Ste 100, Irvine, CA 92618-5201
+1 714-508-8800 (Tel)
+1 714-508-8878 (Fax)
No responsibility is assumed by Teridian Semiconductor Corporation for use of this product nor for any infringements of patents and trademarks or
other rights of third parties resulting from its use. No license is granted under any patents, patent rights or trademarks of Teridian Semiconductor
Corporation, and the company reserves the right to make changes in specifications at any time without notice. Accordingly, the reader is cautioned
to verify that the data sheet is current before placing orders.
© 2009 Teridian Semiconductor Corporation
02/09 - Rev 1.0
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