Lexmark T642 Technical Reference page 330

ACKNLG*, ERROR*, SLCT, PE Drivers for the Lexmark T640x
The following diagram illustrates the ACKNLG*, ERROR*, SLCT, PE drivers for the
Lexmark T640x.
BUSY Driver and INIT* Receiver for the Lexmark T640x
The following diagram illustrates the BUSY driver and the INIT* receiver for the
Lexmark T640x.
50K ohm ±5%
74LVC161284
INIT*
1500 pF ± 20%
(input)
GND
BUSY
(output)
150 pF ± 20%
GND
8-17
Connector
Pin
150 pF ±20%
GND
74LVC161284
74LVC161284
Interfaces