LSI LSI53C896, Technical Manual

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6-8 Specifications
6.2 TolerANT Technology Electrical Characteristics
The LSI53C896 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 6.13 provides electrical
characteristics for SE SCSI signals. Figure 6.3 through Figure 6.7
provide reference information for testing SCSI signals.
Table 6.13 TolerANT Technology Electrical Characteristics for SE SCSI Signals
1
Symbol Parameter Min Max Units Test Conditions
V
OH
2
Output high voltage 2.0 V
DD
V I
OH
=
−
7 mA
V
OL
Output low voltage V
SS
0.5 V I
OL
= 48 mA
V
IH
Input high voltage 2.0 V
DD
+0.3 V –
V
IL
Input low voltage V
SS
−
0.3 0.8 V Referenced to V
SS
V
IK
Input clamp voltage
−
0.66
−
0.77 V V
DD
= 4.75; I
I
=
−
20 mA
V
TH
Threshold, HIGH to LOW 1.0 1.2 V –
V
TL
Threshold, LOW to HIGH 1.4 1.6 V –
V
TH
-V
TL
Hysteresis 300 500 mV –
I
OH
2
Output high current 2.5 24 mA V
OH
= 2.5 V
I
OL
Output low current 100 200 mA V
OL
= 0.5 V
I
OSH
2
Short-circuit output high
current – 625 mA Output driving low, pin shorted
to V
DD
supply
3
I
OSL
Short-circuit output low
current – 95 mA Output driving high, pin shorted
to V
SS
supply
I
LH
Input high leakage – 20
µ
A V
DD
5%, V
PIN
= 2.7 V
I
LL
Input low leakage
−
20 –
µ
A V
DD
5%, V
PIN
= 0 V
I
PD
Power down leakage – 20
µ
A V
DD
= 0 V, V
PIN
= 1.2 V
R
I
Input resistance 20 – M
Ω
SCSI pins
4
C
P
Capacitance per pin – 15 pF PQFP
*