Lexmark T642 - Page 330

Interfaces
8-17
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.
74LVC161284
74LVC161284
INIT*
(input)
GND
GND
BUSY
(output)
150 pF
±
20%
50K ohm
±5%
1500 pF
±
20%
Connector
Pin
74LVC161284
GND
150 pF ±20%