Denon S-81 Service Manual page 39

TERMINAL
NAME NO.
AGND 6
BCK 11
BYPAS 8
DGND 13
DOUT 12
FMT0 17
FMT1 18
LRCK 10
MODE0 19
MODE1 20
OSR 16
PDWN 7
SCKI 15
TEST 9
V 5
CC
V 14
DD
V L 1
IN
V R 2
IN
V 1 3
REF
V 2 4
REF
(1) Schmitt-trigger input
(2) Schmitt-trigger input with internal pulldown (50 kW typically), 5-V tolerant
(3) Schmitt-trigger input, 5-V tolerant
SN74LV157A (IC705,706 : 1U-3762)
(TOP VIEW)
A/B V
1 16
CC
1A G
2 15
1B 4A
3 14
1Y 4B
4 13
2A 4Y
5 12
2B 6 11 3A
2Y 7 10 3B
GND 8 9 3Y
FUNCTION TABLE
INPUTS
SELECT SELECT
G G
A/B
A
H X X
L L L
L L H
L H X
L H X
I/O DESCRIPTION
– Analog GND
I/O Audio data bit clock input/output
I HPF bypass control. LOW: Normal mode (dc reject); HIGH: Bypass mode (through)
– Digital GND
O Audio data digital output
I Audio data format select input 0. See Data Format section.
I Audio data format select input 1. See Data Format section.
I/O Audio data latch enable input/output
I Mode select input 0. See Data Format section.
I Mode select input 1. See Data Format section.
I Oversampling ratio select input. LOW: ´ 64 f
I Power-down control, active-low
I System clock input: 256 f
I Test, must be connected to DGND
– Analog power supply, 5-V
– Digital power supply, 3.3-V
I Analog input, L-channel
I Analog input, R-channel
– Reference-voltage-1 decoupling capacitor
– Reference-voltage-2 decoupling capacitor
logic diagram (positive logic)
OUTPUT
OUTPUT
DATA
Y Y
B
X L
X L
X H
L L
H H
Pin numbers shown are for the D, DB, DGV, J, NS, PW, and W packages.
(1)
(1)
(2)
(2)
, HIGH: ´ 128 f
S
(2)
(3)
, 384 f , 512 f or 768 f
S S S S
(2)
2
1A
3
1B
5
2A
6
2B
11
3A
10
3B
14
4A
13
4B
15
G
1
A/B
39
S-81/S-81DAB
(2)
(2)
(2)
(2)
S
4
7
9
12
1Y
2Y
3Y
4Y