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7-6 Electrical Characteristics
7.2 TolerANT Technology
The LSI53C810A features TolerANT technology, which includes active
negation on the SCSI drivers and input signal filtering on the SCSI
receivers. Active negation actively drives the SCSI Request,
Acknowledge, Data, and Parity signals HIGH rather than allowing them
to be passively pulled up by terminators. Table 7.12 provides electrical
characteristics for SE SCSI signals. Figure 7.1 through Figure 7.5 show
the effect of TolerANT technology on the DC characteristics of the chip.
Table 7.11 Bidirectional Signals—GPIO0_FETCH/, GPIO1_MASTER/
Symbol Parameter Min Max Unit Test Conditions
V
IH
Input high voltage 2.0 V
DD
+0.5 V –
V
IL
Input low voltage V
SS
−0.5 0.8 V –
V
OH
Output high voltage 2.4 V
DD
V −16 mA
V
OL
Output low voltage V
SS
0.4 V 16 mA
I
OH
Output high current −8 – mA 2.4 V
I
OL
Output low current 16 – mA 0.4 V
I
IN
Input leakage −10 10 µA–
I
OZ
3-state leakage −10 10 µA–
Note: All the signals in this table have 100 µA pull-ups that are enabled when TESTIN is low.