Kenwood TS-2000 Service Manual page 41

Serial-Parallel : BU2099FV
(Final unit IC205, Control unit IC530,
Display unit IC4, TX-RX 1 unit IC5,16,17,
TX-RX 2 unit IC2)
Block diagram
1
VSS
2
NC
3
DATA
LPF
CLOCK 4
5
LCK
6
Q0
Q1 7
Q2 8
Q3 9
Q4 10
Pin description
No. Name I/O
1 Vss – GND
2 NC – NC
3 DATA I Serial data input.
4 CLOCK I Shift register shift clock
(rising edge trigger).
5 LCK I Storage register latch clock
(rising edge trigger).
6~17 Q0~Q11 O Paralle data output
(Qx) (Nch open drain FET).
18 SO O Serial data output.
19 OE I Output enable control input.
20 VDD – Power
SEMICONDUCTOR DATA
20 VDD
19 OE
Control
circuit
18 SO
Q11
17
Q10
16
Q9
15
Q8
14
13 Q7
Q6
12
11 Q5
Description
Latch data L H
Output FET On Off
D flip-flop : TC7WH74FU (Filter unit IC2)
Logic diagram
(7)
PR S
(1)
CK C
(2)
D D
(6)
CLR R
Truth table
Input
CLR PR D
L H X
H L X
L L X
H H L
H H H
H H X
X : Don't care
Analog Switch : TC74HC4052AFT (Control unit IC6)
Analog Switch : TC74HC4053AFT (Control unit IC5)
Mixer : TC74HC4053AFT (TX-RX 1 unit IC3)
Logic diagram
TC74HC4052AFT
MUXDMUX
(10)
A 0
0
4 x
(9)
3
B 1
(6)
INH G4
(12)
0
0X
(14)
1
1X
(13)
X-COM 0...3
(15)
2 2X
(11)
3 3X
(1)
0Y
(5)
1Y
(3)
Y-COM
(2)
2Y
(4)
3Y
Truth table
Control inputs
Inhibit C* B A
L L L L
L L L H
L L H L
L L H H
L H L L
L H L H
L H H L
L H H H
H X X X
X : Don't care, * : Except HC4052A
TS-2000/X
(5)
Q
(3)
Q
Output Function
CK Q Q
X L H Clear
X H L Preset
X H H –
↑
L H –
↑
H L –
↓
Qn Qn No change
TC74HC4053AFT
MUXDMUX
(6)
INH G2
(11) (12)
A 2 x 0 0 0X
2 x 1
(13)
(14)
X-COM 0,1
1 1X
(10)
(2)
B
0Y
(15) (1)
Y-COM
1Y
(9) (5)
C 0Z
(3)
(4)
Z-COM 1Z
"ON" channel
HC4052A HC4053A
0X, 0Y 0X, 0Y, 0Z
1X, 1Y 1X, 0Y, 0Z
2X, 2Y 0X, 1Y, 0Z
3X, 3Y 1X, 1Y, 0Z
– – 0X, 0Y, 1Z
– – 1X, 0Y, 1Z
– – 0X, 1Y, 1Z
– – 1X, 1Y, 1Z
None None
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