TDA6404 Просмотр технического описания (PDF) - Philips Electronics
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TDA6404 Datasheet PDF : 32 Pages
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Philips Semiconductors
5 V mixer/oscillator-PLL synthesizers for
hyperband tuners
Product specification
TDA6404; TDA6405;
TDA6405A
Table 1 I2C-bus mode, write data format for the TDA6404 and TDA6405
NAME
BYTE
MSB
BITS
Address byte
ADB
1
1
0
0
0
Divider byte 1
DB1
0
N14
N13
N12
N11
Divider byte 2
DB2
N7
N6
N5
N4
N3
Control byte
CB
1
CHP
T2
T1
T0
Band-switch byte BB
X
X
X
X
X
MA1
N10
N2
RSA
UHF
MA0
N9
N1
RSB
VHFH
LSB
R/W = 0
N8
N0
OS
VHFL
ACK
A
A
A
A
A
Table 2 I2C-bus mode, write data format for the TDA6405A
NAME
BYTE
MSB
BITS
Address byte
ADB
1
1
0
0
0
Divider byte 1
DB1
0
N14
N13
N12
N11
Divider byte 2
DB2
N7
N6
N5
N4
N3
Control byte
CB
1
CHP
T2
T1
T0
Band-switch byte BB
X
X
X
X
UHF
MA1
N10
N2
RSA
X
MA0
N9
N1
RSB
VHFH
LSB
R/W = 0
N8
N0
OS
VHFL
ACK
A
A
A
A
A
I2C-bus address selection
The module address contains programmable address bits (MA1 and MA0) which offer the possibility of having several
synthesizers (up to 4) in one system by applying a specific voltage on the AS input. The relationship between MA1 and
MA0 and the input voltage applied to the AS input is given in Table 4.
Table 3 Description of symbols used in Tables 1 and 2
SYMBOL
A
MA1 and MA0
N14 to N0
CHP
T2, T1 and T0
RSA and RSB
OS
UHF, VHFH and VHFL
X
DESCRIPTION
acknowledge
programmable address bits (see Table 4)
programmable divider bits; N = N14 × 214 + N13 × 213 + ... + N1 × 21 + N0
charge pump current bit:
CHP = 0; ICP = 60 µA
CHP = 1; ICP = 280 µA (default)
test bits (see Table 5)
reference divider ratio select bits (see Table 6)
tuning amplifier control bit:
OS = 0; normal operation; tuning voltage is ‘ON’
OS = 1; tuning voltage is ‘OFF’ (high-impedance)
PNP ports control bits:
bit = 0; buffer n is ‘OFF’ (default)
bit = 1; buffer n is ‘ON’
don’t care bit: may be a logic 0 or a logic 1
1999 Jan 13
7
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