User Manual

38
Peripheral Outputs
There are 8 peripheral outputs internal to the interrogator. 4 of these are
available at the DB-25 connector: pins 20, 7, 19, and 6 can be controlled
by setting or resetting bits, 3, 4, 5 and/or 6 of the command data byte of
the Write Peripheral Outputs command. The outputs are compatible
with CMOS levels.
Table 5. Output Characteristics
*Note: VCC Min. is 4.75 volts, VCC is nominally 5.0 volts.
Description Min. Max. Units
High level output voltage @I
OutputHigh
= 1.0 mA, VCC* Min.
VCC* – 0.5 Volts
Low level output voltage @I
OutputHigh
= 12.0 mA, VCC* Min.
.4 Volts
Source current -1.0 mA
Sink current 12.0 mA
Ouput leakage current -10 +10
µ
A
U519 FCC rewrite 2-22-01.p65 2/22/2001, 2:43 PM38