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r-::bUS
WRITE
CIRCUITRY
TLN2419A DIAGNOSTIC
METERING PANEL
SCHEMATIC DIAGRAM
NOTES:
I
I
ADDRESS
TRUTH
TABLE
I
PQS
I T I ON
A3 A2 AI Art
0
o a
0
0
o
0
0
I
0
0
I
0
I
0
o
I
o
I
o a
a
I
0
I
a
I I
a
I
a
I
I
I
a a
a
I
a a
I
10
I
a
I
a
I
II
I
a
I
12
100
13
I I
0
I
14
I
I
I
a
L
15
I I I I
1.
Unless
otherwise
specified,
all resistor
values
are in ohms
and ali capacitor
values
are in microfarads.
Integrated
Circuii
Data Chart
Ref.
Logic
Desig.
5V
Gnd
Description
U1201
24
12
4-Bit
Latch
& 4·Line·to·16·Line
Decoder
U1202
16
8
Dual Monostable
Multivibrator
U1203
16
8
Quad
D-Type
Flip-Flop
With
Clear
U1204, 5
16
8
BCD-to-Hex
7-Segment
Latch-Decoder-
Driver
U1206
16
8
Inverting
Hex Buffer
U1207, 8
16
8
Quad
Latch
U1209
14
7
Quad
Exclusive-OR
Gate
U1210
14
7
Dual
5-lnput
Positive-NOR
Gates,
With
Totem-Pole
Outputs
U1211
14
7
Quad
2-lnput
Positive-NAND
Gates,
With
Open-Coli
ector
Outputs
U1216
-
-
5-Volt RegUlator:
Pin 1
=
Fused A
+;
Pin 2
=
Logic
Gnd; Pin 3
=
5 V
U1217
1,13,16
8
TTL-or CMOS-to-CMOS
Hex Level Shifter
IADDRESS
I
SELECT
SWITCH
S1201
DATA
SELECT
+5V
SWITCHES
S 1202
~
~
I
S1203
I
B
~
S 1204
~
[D2J
51205
B
Refer to Address
Truth Table
'for switch output states.
+ 5V
+ 5V
0-
RI204
RIZ03
RIZ02
47K
47K
47K
SELECTED
DATA
LATCH
6
0-
o¢
POL
sOjj
00
o¢
01
ID
SOl
01
01
02
13
U1207
II
S02
02
02
03
I.
03
03
S D3
eLK
+5V
B
o
IT]
A01- ' '-£>---
o
o
A I 2
0[;]
SELECTED
DATA
REGISTER
CIRCUIT
U1Z03
O¢
01
12
02
13
03
I9
eLK
eLR
o
EJo
o
0
A2
0
0
0
0
A3 4
[8]
COM
5
o
~o
SA3
FUSEDA+
+
>---~'-1
BA3
U1209C:»,,1
O'------B~-
From
mo,,,lng, euato and power section.
U1Z18 I JO"----!'l~-----''''''-
Ul211AI
j!)"----!'l~----f!""-
Whon swlfch S1
Dat« Display LIl
(Q1201 thru Q1;'
ena operatlnQ
(,
Simultaneously,
U1201 (1.lp&0Ied
Chf§S
(01205
tnr
LED's
of the
s
(D$1201 thru D$
i5?l
-
6
01
02
II
03
14
00
011-'--~[O>-----
Q2
10
031-'-"5'--[0>----_
o
R1255
13K
I
4- BIT
LATC H B\
JJ
4- LINE - TO-16-
LINE
DECODER
SA
A0
5¢
II
51
SAl
3
10
AI
S2
53
SA2
21
54
A2
S5
8A3
22
A3
S6
S7
58
18
U1201
59
17
20
RI263
SID
13K
23
51
j
INHI BIT
+ SV
R1212
47K
,,,,,.o {
U12028
-0
12
Q
10
37
40
I
>4.9
MS
MONOSTABLE
L
R1206
D5
OS
22
47K
U1217A
PIO
J1201
r
R1208
10
SA¢
13
47K
U1217D
14
R1209
BAI
MUXlw/>
o
B8AA~
Address
47K
U12178
Lines
Rt210
14
IS
BA2
15
47K
U1217F
RI211
11
12
BA3
t>-
BA3
16
47K
U1217E
R1207
EXPANSION
RESET
14
15
EXPANSION
RESET
EXPANSION RESET
12
0
47K
U1217C
14
68P81114E03
2-12-88
3.4
MONOSTABLE
lelch
MUXbus
Rt266
and
into
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