Radio Shack TRS-80 Service Manual page 35

CPU MOOULE PARTS LIST (cont'd)
MANUFACTURER'S RADIO SHACK
SYMBOL DESCRIPTION
PART NUMBER PART NUMBER
U25
416, RAM
804·1016
AXX3021
I
U32
416. RAM
804·1016
AXX3021
U33
74LS04, Hex Inverter
802.()OO4
AMX3552
U34
74LS05, Hex Inverter with
a02.QOO5 AMX3553
Open Colleeter
U35
74lS05, Hex Inverter with 802-0005 AMX3553
Open Collecter
U36 MCM68A316E. Character Generator
8044316 AXX304Q
U37
74LSOO, Quad 2·input NAND gate
802.()OOO
AMX3550
U38
74LS266, Quad Exclusive NOR gate 802.Q266 AMX4660
with Open Collectcr Outputs
U39
74lSOB,
Quad
2·input AND gate 802-0008 AMX3698
U40
74lS138, Decoder/De-multiplexer
802.Q138
AMX4583
U41
74LSl38, Oecoder/De-multiplexer
B02.()138 AMX4583
U42
7 4lS157. Quad 2·line to l-1inc B02.Q157 AMX3563
Data 5electer/Multiplexer
U43 416, RAM 804·1016
AXX3021
I
I
j I
U50 416, RAM
804-1016
AXX3021
U51
MC140508
803..Q050 AMX4584
U52
74LS166,8-bit Parallelln/Sarial Out
802{1166 AMX3564
Shift Register
U53 74LS244, Line Driver
802..Q244
AMX3864
U54
74LS153, Dual4-line to l-line
802-1053
AMX3562
Data Selecter/Multiplexer
U55
74LS175, Hex/Quad "0" Flip-Flop
802..Q175 AMX3566
with Clear
US6 74LS393
802-0393 AMX3706
U57
74LS02, Quad 2-input NOR gate 802-0002 AMX3551
usa
7 4LS139, Decoder/De-multiplexer 802..Q139 AMX3800
U59 74LS32, Quad 2-input OR gate 802-0032 AMX3557
U60
74LS145, BCD/Decimal
802..Q145
AMX4659
Decoder/Driller
U6,
74LS175, Hex/Quad "0" Flip-Flop
802..Q175 AMX3566
U62
74LS90, Decade, (+12), 802-0090
AMX3804
Binary Counter
U63
8126, Bus Transceiver 806.{)026
AMX4261
U64
8T26, Bus Transceiver
806-0026
AMX4261
U65
MC14050B B03..Q050 AMX4584
U66
74LS240, Octal Buffer
802.{)24O AMX4225
U67
74LS245 802.Q245 AMX4470
U68
74LS273
802.Q273 AMX4227
U69
74LS157, Quad 2-line to 1-I1no 802.Q157 AMX3563
Data Selector/Multiplexer
U70
74LS157, Quad 2-line to 1-line 802.Q157
AMX3563
Data Selector/Multiplexer
U71
74LS157, Quad 2-line to 1-line 801.Q157 AMX3563
Data Selector/Multiplexer
28