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LNBP21 Datasheet(PDF) 1 Page - STMicroelectronics

Part # LNBP21
Description  LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
PDF  20 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LNBP21 Datasheet(HTML) 1 Page - STMicroelectronics

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October 2002
s
COMPLETE INTERFACE BETWEEN LNB
AND I2CTM BUS
s
BUILT-IN DC/DC CONTROLLER FOR
SINGLE 12V SUPPLY OPERATION
s
ACCURATE BUILT-IN 22KHz TONE
OSCILLATOR
s
SUITS WIDELY ACCEPTED STANDARDS
s
FAST OSCILLATOR START-UP FACILITATES
DiSEqCTM ENCODING
s
BUILT-IN 22KHz TONE DETECTOR
SUPPORTS BI-DIRECTIONAL DiSEqCTM
s
LOOP-THROUGH FUNCTION FOR SLAVE
OPERATION
s
LNB SHORT CIRCUIT PROTECTION AND
DIAGNOSTIC
s
CABLE LENGTH DIGITAL COMPENSATION
s
INTERNAL OVER TEMPERATURE
PROTECTION
s
ESD RATING 4KV ON POWER
INPUT-OUTPUT PINS
DESCRIPTION
Intended for analog and digital satellite STB
receivers/SatTV, sets/PC cards, the LNBP21 is a
monolithic voltage regulator and interface IC,
assembled
in
SO-20
and
PowerSO-20,
specifically designed to provide the power and the
13/18V, 22KHz tone signalling to the LNB
LNBP21
LNBP SUPPLY AND CONTROL IC WITH
STEP-UP CONVERTER AND I2C INTERFACE
Enable
I Select
Preregul.+
U.V.lockout
+P.ON res.
Feedback
Step-up
Controller
V Select
Linear Post-reg
+Modulator
+Protections
22KHz
Oscill.
Vup
LT1
OUT
SDA
SCL
DSQIN
Vcc
Diagnostics
I²C
interf.
Tone
Detector
DSQOUT
LT2
DETIN
LNBP21
Byp
Gate
Sense
EXTM
ADDR
SCHEMATIC DIAGRAM
SO-20
PowerSO-20


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