IC Data Sheets
8.
8.7
Diagram
B02, LNBH23QTR (IC U751)
Figure 8-9 Internal block diagram and pin configuration
19240_304_120221.eps
120221
Block diagram
Pinning information
NC
VCC-L
VCC
A-GND
VoRX
VoTX
NC
NC
NC
LX
P-GND
NC
NC
S
CL
AD
D
R
D
S
QOU
T
D
S
QI
N
EXT
M
TTX
BYP
NC
NC
SDA
NC
NC
NC
VU
P
IS
EL
DE
TIN
VCTRL
NC
NC
LNBH23
SDA
SCL
LNBH23
ADDR
A-GND
I²C Diagnostics
I²C interface
DSQIN
Vup
VoRX
VoTX
LX
22KHz
Oscill.
PW
M
Con
tro
lle
r
Rsense
EN
VSEL
Linear Post-reg
+Modulator
+Protections
+Diagnostics
ITEST
TTX
EN
VSEL
VOUT Control
EXTM
P-GND
Preregulator
+U.V.lockout
+P.ON reset
Byp
Vcc
Vcc-
L
ISEL
TTX
TEN
DSQOUT
DETIN
22KHz Tone
Amp. Diagn.
22KHz Tone
Freq. Detector
TTX
VCTRL
SDA
SCL
ADDR
A-GND
I²C Diagnostics
I²C interface
DSQIN
Vup
VoRX
VoTX
LX
22KHz
Oscill.
22KHz
Oscill.
PW
M
Con
tro
lle
r
Rsense
EN
VSEL
Linear Post-reg
+Modulator
+Protections
+Diagnostics
ITEST
TTX
EN
VSEL
VOUT Control
EXTM
P-GND
Preregulator
+U.V.lockout
+P.ON reset
Byp
Vcc
Vcc-
L
Byp
Vcc
Vcc-
L
ISEL
TTX
TEN
DSQOUT
DETIN
22KHz Tone
Amp. Diagn.
22KHz Tone
Freq. Detector
TTX
TTX
VCTRL