Product Brief
71M6403
Electronic Trip Unit
The Teridian 71M6403 is an electronic trip unit (ETU) system-on-chip device for air
circuit breakers (ACB), molded case circuit breakers (MCCB) and other types of intelligent
switchgear. Utilizing Teridian’s patented Single Converter Technology™, the 71M6403
incorporates a 22-bit delta-sigma ADC, 7 current sensor inputs, digital temperature
compensation, precision voltage reference, 32-bit programmable computation engine,
timers, Real Time Clock (RTC), two UARTs and an single cycle execution 8-bit MCU.
Armed with an internal digital di/dt integrator, this programmable device supports either
current transformer (CT) or Rogowski-Coils for any or all input channels and provides
instantaneous and delayed over current, earth-leakage, ground-fault and arc fault
protection functions. Furthermore, the device may be configured to support any number of
conventional or custom protection algorithms that fit specific load configurations in the field.
The 71M6403 includes a 5V LCD charge pump as well as 3V LCD support with up to 168
pixels display and up to 22 DIO pins. Easy conversion to ROM offers unprecedented cost
structure for high volume MCCB applications.
A complete suite of in-circuit emulator (ICE) and development tools, a powerful real-
time signal monitoring tool, programming libraries and reference designs enable rapid
development of advanced switchgear.
Features
22-bit Sigma-delta converter
Six main sensor inputs
One auxiliary input
Supports CT or Rogowski Coils
Internal di/dt integrators
<5ms startup time
Better than 10ppm/°C accuracy
Instantaneous and delay trip
Applications
Electronic Trip Unit (ETU) modules
Protection Relays
Air Circuit Breakers (ACB)
Molded Case Circuit Breakers (MCCB)
Insulated Case Circuit Breakers (ICCB)
Low Voltage Switchgear
Motor Circuit Protection
Peak & RMS current measurement
Calculated or measured GND current
Power measurement functions option
Internal temperature sensor
Digital temperature compensation
Independent 32-bit compute engine
Two UART ports
Two timers
Hardware watchdog
Internal power fault detector
Real Time Clock (RTC)
Battery backup (RTC, RAM)
8-bit MPU (80515) - 1 clock cycle per
instruction (5Mhz max.)
LCD driver (≤168 pixels)
5V LCD charge pump
Up to 22 general purpose I/O pins
High speed serial interface (SSI)
I2C EEPROM interface
64KB Flash, 7KB RAM
Flash memory security
30mW @ 3.3V
100-lead LQFP package
CONVERTER V3.3A
3.3V
V3.3D GNDA GNDD
LCD 5V
BOOST
REGULATOR
VOLTAGE REF
SERIAL PORTS
LCD DRIVER
DIO, PULSE
CLOCK
V2.5
TEMP
SENSOR
COMPUTE
ENGINE
FLASH/ROM
MPU
TIMERS
RTC
ICE
COM0..3
SEG 3..23
SEG 24..27
DIO 4..11
SEG 32..41
DIO 12..21
DIO 4.5
CK38
CK
TX
VREF
VBIAS RAM
SENSE
DRIVE/MOD
RX
RX
TX
PWR FAULT
RESETZ
71M6403
I0
{I1
I2
CT or
Rogowski
Sensors I3
I4
I5
3.5V LCD
88.88.8888
Trip Indicators
4040 Counter
19.66MHz
EEPROM
GND
71M6403 Block Diagram
Ordering Information
For immediate technical information and the name of a local representative or distributor,
visit www.teridian.com, send an e-mail to support@teridian.com or call (714) 508-8800.
No responsibility is assumed by Teridian Semiconductor Corporation for use of this product nor for any infringements of patents and trade-
marks 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.
© 2006 Teridian Semiconductor Corporation 6/06 - rev 1.0
6440 Oak Canyon, Irvine, CA 92618-5201
714-508-8800 (Tel)
714-508-8878 (Fax)
PART DESCRIPTION ORDERING NUMBER PACKAGE MARKING
71M6403
Electronic Trip Unit, 100-pin LQFP
71M6403-IGT 71M6403-IGT
71M6403
Electronic Trip Unit, 100-pin LQFP, Lead Free
71M6403-IGT/F 71M6403-IGTF
