Texas Instruments 99/4A - Page 117

MAINFRAME RAM - TRAP
COMPONENT LAYOUT :
PARTS LIST :
By
C - 1, C - 2 O.luf capacitors
R-l
560^
IC- 1
74LS13-3N
R-2 100krt All resistors are watt
IC- 2
74LS21N
R-3 - R-8
100 5%
IC- 3
74LS74AN
R-9, R-10
2.2k ya .
IC- 4
74LS174N
S-l
SPST Push button switch(momentar
IC- 5
TMS4036-2NL S-2, S-3 SPST Toggle switches N.O)
IC- 6
2532 (EPROM)
3.4.80