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D. SPECIFICATIONS
This appendix describes the electrical, environmental, and mechanical specifications of
the ZT 8995. It also includes illustrations of the board dimensions, connector locations,
and the P/E connector pinouts, as well as tables showing the pin assignments for the
ZT 8904's five connectors.
ELECTRICAL AND ENVIRONMENTAL SPECIFICATIONS
The following topics list electrical and environmental specifications, including absolute
maximum ratings, DC operating characteristics, and STD bus loading characteristics.
Absolute Maximum Ratings
Supply Voltage, VCC:
0 to 7 Volts
Supply Voltage, AUX +V:
0 to 15 Volts
Storage Temperature:
-65º t150º Celsius
Operating Temperature:
0º t70º Celsius
Non-Condensing Relative Humidity:
< 95% @ 40º Celsius
DC Operating Characteristics
Twisted-Pair Ethernet
(10BaseT) Operation:
+5 VDC ± 5% @ 0.140 A typ., 0.350 A max
Thin Ethernet
(10Base2) Operation:
+5 VDC ± 5% @ 0.495 A typ., 0.705 A max
Thick Ethernet
(10Base5) Operation:
+5 VDC ±5% @ 0.12 A typ., 0.33 A max
+12 VDC ±5% @ 0.17 A typ., 0.22 A max
STD Load Characteristics
The unit load is a convenient method for specifying input and output drive capability of
STD bus cards. In STD bus systems, one unit load is equal to one LSTTL load as
follows:
•
Maximum high level input current:
20 µA.
•
Maximum low level input current:
-400 µA.
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