IBM Series 1 User Manual page 76

c
c
Figure 2-22. I/O channel driver/receiver classification
Type C-A, C-B
Driver
open
collector
Receiver
Type C-C
Same circuit
type as C-A, C-B
Type C-D
Driver
active
collector
Type C-E
Receiver
4955
+5 V
±
10%
0.6 kn ± 2.5%
Output/input
Output
+5 V
±
10%
0.39 kn
±
2.5%
Input
Driver
open
collector
4953
+5 V
±
10%
0.5 kn
±
2.5%
Output/input
Conditioned receivers (up to 4) are located
on the storage card and storage interface
Driver
open
collector
Receiver
Driver
active
collector
Receiver
+5 V
±
10%
0.5 kn
±
2.5%
Output/input
Output
+5 V
±
10%
0.5 kn
±
2.5%
Input
Processor I/O Channel 2-61