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SN761672ADARG4 Datasheet(PDF) 9 Page - Texas Instruments

No. de pieza SN761672ADARG4
Descripción Electrónicos  TV/VCR TUNER IC
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Fabricante Electrónico  TI [Texas Instruments]
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SN761672ADARG4 Datasheet(HTML) 9 Page - Texas Instruments

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SN761672A
TV/VCR TUNER IC
SLLS437 – JANUARY 2001
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
function description
The device can be controlled according to the I2C bus format.
Table 1. Serial Interface Function
PIN
PIN NAME
FUNCTION
17
SCL
Clock input
18
SDA
Data input/output
19
AS
Address selection input
20
ADC
ADC input/test output
I2C bus mode
I2C write mode (R/W = 0)
Table 2. Write Data Format
MSB
LSB
ACKNOWLEDGE
Address byte (ADV)
1
1
0
0
0
MA1
MA0
R/W 0
A
Divider byte 1 (DB1)
0
N14
N13
N12
N11
N10
N9
N8
A
Divider byte 2 (DB2)
N7
N6
N5
N4
N3
N2
N1
N0
A
Control byte (CB)
1
CP
T2
T1
T0
RSA
RSB
OS
A
Band switch byte (BB)
X
X
X
X
BS4
BS3
BS2
BS1
A
Table 3. Description of Data Symbol
SYMBOL
DESCRIPTION
DEFAULT
MA1, MA0
Address set bits (see Table 4)
N14...N0
Programmable counter set bits
N=N14*2^14+N13*2^13+...+N1*2+N0
Nn = 0
CP
Charge pump current set bit
60
µA (CP=0) 280 µA (CP=1)
CP = 1
T2, T1, T0
Test bits (see table 5)
Normal Mode: T2=0, T1=0, To=1/0
T2=0, T1=0, T0=1
RSA, RSB
Reference divider ratio selection bits (see Table 6)
RSA=0, RSB=1
OS
Tuning amplifier control bit
Tuning voltage on (OS=0)
Tuning voltage off, high impedance (OS=1)
OS=0
BS4...BS1
Band switch ports control bits
BSn=0:OFF
BSn=1:ON
Band selection by BS1,2,4 (X = don’t care)
BSn=0
BS1
BS2
BS4
VHF-LO
1
0
0
VHF-HI
X
1
0
UHF
X
X
1
X
Don’t care
Table 4. Address Selection
VOLTAGE APPLIED ON CE INPUT
MA1
MA0
0 V to 0.1 VCC
0
0
Always valid
0
1
0.4 VCC to 0.6 VCC
1
0
0.9 VCC to VCC
1
1


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