Xerox FaxCentre F12, Service Manual

Page: 89 / 380

Circuit Description
5-51 3/03 WorkCentre Pro 412, FaxCentre F12 &
WorkCentre M15/M15i
5-5-1-1 Electrical Specifications
This section provides the PM-22’s electrical specifications.
DC Characteristics
Table presents the PM-22’s DC characteristics.
IMPORTANT: CLOCK pin timing is measured at TTL levels, not CMOS. The system CLOCK driver must
be configured correctly in order to ensure that duty cycle and Vil specifications are met.
5-5-1-2 Pin Classification and Loading
Table describes the pin classification and loading of the FaxCentre F12’s signal pins. The capacitance col-
umn presents the values used to derive the specification timing. The current columns present maximum
values. Table uses the following notation for pin types:
Parameter Symbol Min. Max Units
Input capacitance for all input only
pins Cin 0 10 pF
Input capacitance for all bidirec-
tional pins Cio 0 15 pF
Input high voltage for all inputs Vin 2.0
VDDBIAS
+0.3
Volts
Input low voltage for all inputs Vil GND -0.3 0.8 Volts
Output high voltage for all outputs Voh 2.4 VDD Volts
Output low voltage for all outputs Vol GND 0.4 Volts
Input current with input at VDD Iih -30 30
Input current with input at GND Iil -30 30
Tri-state output current with output
at VDD Iozh -100 100 µAµA
Tri-state output current with output
at GND Iozl -100 100
Power supply current Icc 0 95 mA