TolerANT Technology Electrical Characteristics
6-7
6.2 TolerANT Technology Electrical Characteristics
The LSI53C1000 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.
provides electrical
characteristics for SE SCSI signals. Figures
through
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
2.2
3.7
V
I
OH
= 7 mA
V
OL
Output low voltage
0.0
0.5
V
I
OL
= 48 mA
V
IH
Input high voltage
2.0
–
V
–
V
IL
Input low voltage
–
0.8
V
Referenced to V
SS
V
IK
Input clamp voltage
−
0.66
−
0.77
V
V
pp
= 4.75 V;
I
1
=
−
20 mA
V
TH
Threshold, HIGH to LOW
1.15
1.25
V
–
V
TL
Threshold, LOW to HIGH
1.55
1.65
V
–
V
TH
-V
TL
Hysteresis
300
500
mV
–
I
OH
2
Output high current
0
7
mA
V
OH
= 2.2 V
I
OL
Output low current
48
–
mA
V
OL
= 0.5 V
I
OSH
2
Short-circuit output high
current
48
–
mA
Short to V
DD
3
I
OSL
Short-circuit output low
current
22
–
mA
Short to V
SS
I
LH
Input high leakage
–
20
µ
A
−
0.5<V
DD
<5.25
V
PIN
= 2.7 V
I
LL
Input low leakage
–
20
µ
A
−
0.5<V
DD
<5.25
V
PIN
= 0.5 V
R
I
Input resistance
20
–
M
Ω
SCSI pins
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
Страница 314: ...6 40 Specifications This page intentionally left blank...
Страница 318: ...6 44 Specifications This page intentionally left blank...
Страница 344: ...6 70 Specifications This page intentionally left blank...
Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...