Roland TR-808 Service Notes page 2

TR-808
JUN.
15,
1981
(Top View)
pPDAAAC
As
1 18
As
c
2 17
3 16
Aa
1
4 15
Ao
1
5 14
A,
c
6
13
A2 7
12
CS
8
11
GND
9
10
HM4334P-4
1
024 -word
X
4
-bit
Static
CMOS RAM
As
Ah
Ab
A:
As
I
Oi
I
02
I
03
I
04
cs
\VE
,mmm
c
- + ~V0
IN
0-^V
U®U
© i
n
n n n riryf
I
^
W
[
/
IJ
U
Li Jli
LJ'ir^
<7L
MC14001BCP
Quad
2-Input
NOR
Gate
TA7179P
DUAL
±15V
TRACKING RAGULATOR
GND
BALANCE
+
COMPEN
+
SENSE
+
VOUT
NG
VCC
VOLTAGE
ADJUST
NC
- COMPEN
- SENSE
- VOUT
NC
VEE
Heg.IN
=
5raV(
typ)
(
VIN=18-30Vj
Reg. OUT= 5mV
(
typ)
(
I0lJT=0-50raA}
Ripple rejection ratio
= 75dB
Output current
= 100mA (max)
n-T f
OUTPUT
COMMON
INPUT
ORDER
INFORMATION
OUTPUT
VOLTAGE
5
V
6
V
8
V
8.5
V
12 V
15
V
18
V
24
V
TYPE
44A7805C
MA7806C
MA7808C
MA7885C
MA7812C
mA7815C
mA7818C
mA7824C
PART
NO.
MA7805UC
31A7806UC
MA7808UC
44A7885UC
MA7812UC
MA7815UC
44A7818UC
^A7824UC
HA7800 SERIES
3-TERMINAL
POSITIVE
VOLTAGE
REGULATORS
ABSOLUTE
MAXIMUM
RATINGS
Input Voltage
(5
V through 18 V)
(24 V)
Internal
Power
Dissipation
Storage Temperature Range
Operating Junction
Temperature Range 4iA7800
/4A7800C
Lead Temperature (Soldering,
60
s
time
limit)
TO-3 Package
(Soldering, 10
s
time limit)
TO-220 Package
35
V
40
V
Internally Limited
-65°C
to
+150°C
-55°C to +150°C
0"C
to
+150°C
300°
C
230°C
HD14584B
MC14051B
8-Channel Analog
Hex
Schmitt
Trigger
Multiplexer/Oemultiplexer
Vdd
' Pin 16
Vss
= Pin 8
Vg
g
-
Pin 7
AN69I2
Quad
Comparator
0UTPUT2|T
OLFTPUTl
H
V-[3
TRUTH TABLE
1
Control Inputs
ON
Switches Select
Inhibit
c
B
A MC14051B MC14062B MC14053B
0 0 0 0 xo
YO XO
ZO YO XO
0
0 0 X
1
Y1 XI zo YO XI
0 0
1
0
X2 Y2 X2 ZO Y1 XO
0 0
1 1
X3 Y3 X3
zo Y1
XI
0
1
0 0 X4 Z1 YO XO
0
1
0
1
X5
Z1
YO XI
0
1 1
0
X6
Z1 Y1
XO
0
1
1 1
X7 Z1 VI X
1
1
X X X
None None
c 0
2
'Not applicable
for
MC14052
X = Don't Care
MC14051B FUNCTIONAL DIAGRAM
BLOCK DIAGRAM
MC14013B
BA662
CJiD
/•£xUinnjQjm
CWT
)
llj'ilj l!i
LlL ITtT
y
-<JV
TC4011BP
Quad
2-Input
NAND
Gate
IN
+
o
n n n
n.
)
LC
OTJ4
IN
^
/^PC 4558
C
DUAL TYPE D FLIP-FLOP
TRUTH TABLE
Vdd
' Pin 14
Vss " Pin
7
INPUTS OUTPUTS
CLOCK* DATA RESET SET Q Q
0 0 0 0
1
_r~
1
0 0
1
0
X 0 0 Q
Q
X X
1
0 0
1
X
X 0
1 1
0
X X
1 1 1 1
X
-
Don't Care
T
= Level Change
2