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40930701TH DRAFT Vesion 186 /
4) Signal level
• LOW : 0 V to +0.8 V
• HIGH : +2.4 V to 5.0 V
5) Interface circuit
a) Receiving circuit
DATA STROBE and INPUT PRIME
DATA BIT-1 to 8
b) Sending circuit
C
R2
R1
+5V
74LS19 or equivalent
Signal name R1 R2
DATA STROBE
INPUT PRIME
3.3K
Ω
3.3K
Ω
C
100
Ω
1K
Ω
560pF
0.001
µ
F
R3=3.3KΩ
R3
+5V
74LS374 or equivalent
R4=3.3KΩ
R4
+5V
7407 or equivalent (Open collector)