Texas Instruments MC-1000WU-20A - Manual (Page 18)

Interface Circuit
2-4 Specifications
2.2 Interface Circuit
The input interface circuit of VD, HD, and MCK shown in Figure 2–1, consists
of one SN75124 input gate pulled up through a 4.7-k
W
resistor to 5 Vdc and
pulled down to ground through an optional 100-
W
resistor. The optional pull
down is selected by jumpers JP1 (MCK), JP2 (HD), and JP3 (VD).
Figure 2–1. Input Interface Circuit of VD, HD, and MCK
5 V
VD
4.7 k
Ω
75124
JP3
100
Ω
GND
5 V
HD
4.7 k
Ω
75124
JP2
100
Ω
GND
5 V
MCK
4.7 k
Ω
75124
JP1
100
Ω
GND
Figure 2–2. Output Interface Circuit of Pixel and Shutter Monitor
75123
470
Ω
Shutter
Monitor
Pixel Out
100
Ω 470
Ω
(see Note A)
NOTE A. For pixel clock receiving, pull domain resistor 100
Ω
is recommended.