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MAX238CWG (MAXIM) FLAT PACKAGE
+ 5V POWER RS-232 DRIVERS/RECEIVERS
-TOP VIEW-
T2
1
24
T3
OUT
OUT
T1
2
23
R3
OUT
IN
R2
3
22
R3
IN
OUT
R2
4
21
T4
OUT
IN
T1
5
20
T4
IN
OUT
R1
6
19
T3
OUT
IN
R1
7
18
T2
IN
IN
8
GND
17
R4
OUT
V
CC
9
16
R4
IN
(+ 5V )
C1 +
V -
10
15
V +
11
14
C2 -
C1 -
C2 +
12
13
MC14046BF (MOTOROLA) FLAT PACKAGE
C-MOS PHASE LOCKED LOOP
-TOP VIEW-
PCP
( PHASE COMPARATOR ) OUT
1
PC
1 ( PHASE COMPARATOR ) OUT
2
PC
3
B ( PHASE COMPARATOR ) IN
VCO
( VOLTAGE CONTROLLED OSC ) OUT
4
INH
( INHIBIT ) IN
5
C1
A
6
C1
B
7
8
GND
PHASE
SELF
2
14
COMPARATOR 1
PCA
BIAS
CIRCUIT
13
PHASE
3
1
COMPARATOR 2
PCB
4
9
11
VCO
12
VCO
6
7
SOURCE
10
5
FOLLOWER
INH
15
GND
*1
TYPE
V
DD
CD4046BE
HD14046BP
+ 3 to + 8V
MC14046BCP
MC14046BF
TC4046BP
CD74HC4046AM
MC74HC4046AF
+ 2 to + 6V
MC74HC4046AN
CNU-500
5
2
T1
T1
T1
18
1
T2
T2
T2
19
24
T3
T3
T3
21
20
T4
T4
T4
6
7
R1
R1
R1
4
3
R2
R2
R2
22
23
R3
R3
R3
17
16
R4
R4
R4
*
1
V
16
DD
15
Z
D ( ZENER ) OUT
14
PC
A ( PHASE COMPARATOR ) IN
13
PC
2 ( PHASE COMPARATOR ) OUT
R
2
12
R
1
11
10
SF
( SOURCE FOLLOWER ) OUT
9
VCO
( VOLTAGE CONTROLLED OSC ) IN
14
2
PC1
PCA
PC1
13
PC2
3
1
PCB
PCP
PC2
9
4
PCP
VCO
VCO
IN
OUT
11
6
R1
C1A
VCO
12
7
R2
C1B
R1
10
SF
R2
5
15
C1A
INH
ZD
C1B
SF
ZD
MB81C4256A (FUJITSU) FLAT PACKAGE
C-MOS 1M-BIT DYNAMIC RAM
-TOP VIEW-
OE
1
CAS
2
D3
3
D4
4
5
GND
D1
8
D2
9
WE
10
RAS
11
*NC.
12
NC. = NO CONNECTION
13
A0
14
A1
A0-A8
15
A2
CAS
16
A3
D1-D4
20
8
A4
D1
OE
21
9
A5
D2
RAS
22
3
A6
D3
WE
23
4
A7
D4
24
A8
CAS
RAS OE WE
2
11
1
10
10
WE
2
CAS
11
RAS
REF. CONT.
ADDRESS
RAS CLOCK
CAS CLOCK
COUNTER
GEN.
GEN.
9
COLUMN
9
DECODER
SENSE
AMP.
13-16,20-24
A0-A8
9
9
512 × 4
1,048,576
BITS
9
512
MEMORY
CELL
S
1
OE
24
A8
23
A7
22
A6
21
A5
20
A4
V
DD
17
(+ 5V )
16
A3
15
A2
14
A1
13
A0
; ADDRESS INPUT
; COLUMN ADDRESS STROBE
; DATA IN/OUT
; OUTPUT ENABLE
; ROW ADDRESS STROBE
; WRITE ENABLE
WRITE CLK
GEN.
DATA
4
4
IN
8,9,3,4
BUF.
D1-D4
4
4
DATA
4
OUT
4
BUF.
4-5
IC
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