LNBEH21PD STMICROELECTRONICS [STMicroelectronics], LNBEH21PD Datasheet - Page 11

• Manufacturer Part Number: LNBEH21PD
• Description: LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

DiSEqC COMMUNICATION TRUTH TABLE (TEN/VSEL pin controls the internal 22KHz Tone)
13/18V CONTROL WORD COMMUNICATION TRUTH TABLE (TEN/VSEL pin function depends on
VOM bit state)
GENERAL FEATURES TRUTH TABLE
X = don’t care; values are typical unless otherwise specified.
PCL
PCL
PCL
X
0
1
TTX
TTX
TTX
X
0
1
OM
OM
OM
0
0
0
0
1
1
1
1
X
X
X
LLC
LLC
LLC
X
0
0
1
1
0
0
1
1
VOM
VOM
VOM
X
0
1
0
1
0
1
0
1
EN
EN
EN
1
1
1
1
1
1
1
1
1
1
1
1
0
OTF
OTF
OTF
X
X
X
X
X
X
X
X
X
X
X
X
X
OLF
OLF
OLF
X
X
X
X
X
X
X
X
X
X
X
X
X
V
TEN/VSEL = HIGH 22KHz Enabled
TEN/VSEL = LOW 22KHz Disabled
V
TEN/VSEL = HIGH 22KHz Enabled
TEN/VSEL = LOW 22KHz Disabled
V
TEN/VSEL = HIGH 22KHz Enabled
TEN/VSEL = LOW 22KHz Disabled
V
TEN/VSEL = HIGH 22KHz Enabled
TEN/VSEL = LOW 22KHz Disabled
TEN/VSEL pin controls both the LNB output voltage and
the DC/DC Converter Voltage (V
TEN/VSEL = LOW, V
TEN/VSEL = HIGH, V
TEN/VSEL pin controls only the LNB output voltage and the
DC/DC Converter output is forced always at 21.7 V
TEN/VSEL = LOW, V
TEN/VSEL = HIGH, V
TEN/VSEL pin controls both the LNB output voltage and
the DC/DC Converter Voltage (V
TEN/VSEL = LOW, V
TEN/VSEL = HIGH, V
TEN/VSEL pin used to set only the LNB output voltage.
DC/DC Converter output voltage forced always at 22.7 V
TEN/VSEL = LOW, V
TEN/VSEL = HIGH, V
When TTX = 0 the device is set in receiving mode, the TX
output is partially OFF the V
V
When TTX = 1 the device is set in receiving mode, the RX
output is partially OFF the V
V
Pulsed (dynamic) current limiting is selected
Static current limiting is selected
Power blocks disabled
O
O
O
O
O
O
TX = OFF, V
TX = ON, V
= 13.25 V and V
= 19.5V and V
= 20.5 V and V
= 14.25 V and V
O
O
RX = OFF
RX = ON
UP
UP
UP
UP
= 21.7 V
O
O
O
O
= 22.7 V
O
O
O
O
= 15.45 V
= 16.45 V
= 13.25 V and V
= 13.25 V and V
= 14.25 V and V
= 14.25 V and V
= 19.5V and V
= 19.5V and V
= 20.5V and V
= 20.5V and V
Function
Function
Function
O
O
RX pin is ON:
TX pin is ON:
UP
UP
)
)
UP
UP
UP
UP
UP
UP
UP
UP
= 21.7 V
= 21.7 V
= 22.7 V
= 22.7 V
= 15.45 V
= 21.7 V
= 16.45 V
= 22.7 V
LNBEH21
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