CD74HC4094PWR (U2201, U2202)
TRUTH TABLE
CL ▲
Output
Enable
Strobe
Data
Parallel Outputs
Serial Outputs
Q1
QN
QS*
Q′S
0
X
X
OC
OC
Q7
NC
0
X
X
OC
OC
NC
Q7
1
0
X
NC
NC
Q7
NC
1
1
0
0
QN-1
Q7
NC
1
1
1
1
QN-1
Q7
NC
1
1
1
NC
NC
NC
Q7
▲ = Level Change Logic 1 = High
Logic 0 = Low
X = Don’t Care
NC = No Change OC = Open Circuit
* At the positive clock edge, information in the 7th shift register stage is transferred to the 8th register
stage and the QS output.
13
14
15
16
9
10
11
12
5
4
3
2
1
8
7
6
Q7
Q6
Q5
OUTPUT
ENABLE
V
DD
Q
S
Q
′
S
Q8
Q1
CLOCK
DATA
STROBE
V
SS
Q4
Q3
Q2
PIN ASSIGNMENT
U2201
Pin
Port
I/O use
Name
Port Setting
Note
Act. stby
Exit R
1
STROBE
I
I
CE
Chip Enable
2
DATA
I
I
DATA
Serial Data (Direct controll from MPU)
3
CLOCK
I
I
CLK
Serial Clock
4
Q1
O
O LINE2
H
L
PD 10k LINE2 INPUT Relay ON (ON:H)
5
Q2
O
O REC1
H
L
PD 10k RECORDER1 INPUT Relay ON (ON:H)
6
Q3
O
O REC2
H
L
PD 10k RECORDER2 INPUT Relay ON (ON:H)
7
Q4
O
O BI-AMP
H
L
PD 10k Bi-Amp Relay Control (H/L = Bi-Amp/Stereo)
8
VSS
-
-
GND
-
-
-
GND
9
QS
O
O QS
Open
10
Q'S
O
O Q'S
To 4094-2
11
Q8
O
O LINE1
H
L
PD 10k LINE1 INPUT Relay ON (ON:H)
12
Q7
O
O CD
H
L
PD 10k CD INPUT Relay ON (ON:H)
13
Q6
O
O open
L
L
-
Open
14
Q5
O
O PHONO
H
L
PD 10k PHONO INPUT Relay ON (H/L = PHONO/Other)
15
OE
I
I
OE
Output Enable
16
VDD
-
-
VCC
-
-
-
3.3V
U2202
Pin
Port
I/O use
Name
Port Setting
Note
Act. stby
Exit R
1
STROBE
I
I
CE
Chip Enable
2
DATA
I
I
DATA
From 4094-1
3
CLOCK
I
I
CLK
Serial Clock
4
Q1
O
O HQ_MODE
H
L
PD 10k HQ Mode SW (ON:H)
5
Q2
O
O P-DIRECT
H
L
PD 10k Power Amp direct in Relay ON (ON:H)
6
Q3
O
O open
L
L
-
Open
7
Q4
O
O Open
L
L
-
Open
8
VSS
-
-
GND
-
-
-
GND
9
QS
O
O QS
Open
10
Q'S
O
O Q'S
Open
11
Q8
O
O HP_RELAY_IN
H
L
PD 10k HP input Relay Control (H/L=HP ON/OFF)
12
Q7
O
O REC2_MUTE
H
L
PD 10k RECORDER2 OUTPUT Relay ON (ON:H)
13
Q6
O
O REC1_MUTE
H
L
PD 10k RECORDER1 OUTPUT Relay ON (ON:H)
14
Q5
O
O MM
H
L
PD 10k PHONO MM/MC SW (H/L = MM/MC)
15
OE
I
I
OE
Output Enable
16
VDD
-
-
VCC
-
-
-
3.3V
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
31
