Specifications

Performance
Duration
Line driver
Maximum source current
Maximum sink current
Schmitt-Trigger 1 output
Signal
Output pins
Function
Other characteristics
Schmitt- Trigger2 output
Signal
Output pin
Function
Other characteristics
Configuration Information
Power requirements
Power consumption
Bus loads
Approximately
500 nanoseconds
TTL-compatible, open collector circuit
with a 470-
n pull-up resistor to +5 V
5 rnA when output is high (~2.4 V), measuring
from source through load to ground
8 rnA when output is low ($0.8 V), measuring from
external source voltage through load to output
ST1 OUT L (asserted low)
J1 pin 2 and ST1 OUT tab
External time base input or counter of external
events. Input frequency is a function of the input
signal.
Same as clock output
ST2 OUT L (asserted low)
J1 pin 4
Starts counter, sets ST2 flag, and generates an
interrupt (if enabled); causes buffer preset register
(BPR) to be loaded from counter.
Same as clock output
+5 Vdc, 2.2 A (typical)
+12 Vdc,
0.13 A (typical)
11.15 W
1.0 ac
1.0 dc
2-58 MicroVAX 3400 VAXserver 3400 Technical Information