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80C286_08 Datasheet, PDF (43/60 Pages) Intersil Corporation – High Performance Microprocessor with Memory Management and Protection
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80C286
AC Electrical Specifications VCC = +5V ±5%, TA = 0oC to +70oC (C80C286-20, -25), TA = -40oC to +85oC (l80C286-20)
AC Timings are Referenced to the 1.5V Point of the Signals as Illustrated in Data Sheet Waveforms,
Unless Otherwise Specified
20MHz
25MHz
SYMBOL
PARAMETER
MIN MAX MIN MAX UNIT
TEST CONDITION
TIMING REQUIREMENTS
1
System Clock (CLK) Period
25
-
20
-
ns
2
System Clock (CLK) LOW Time
6
-
5
-
ns At 1.0V
3
System Clock (CLK) HIGH Time
9
-
7
-
ns At 3.6V
17 System Clock (CLK) RISE Time
-
4
-
4
ns 1.0V to 3.6V
18 System Clock (CLK) FALL Time
-
4
-
4
ns 3.6V to 1.0V
4
Asynchronous Inputs SETUP Time
4
-
4
-
ns (Note 37)
5
Asynchronous Inputs HOLD Time
4
-
4
-
ns (Note 37)
6
RESET SETUP Time
10
-
10
-
ns
7
RESET HOLD Time
0
-
0
-
ns
8
Read Data SETUP Time
3
-
3
-
ns
9
Read Data HOLD Time
2
-
2
-
ns
10 READY SETUP Time
10
-
9
-
ns
11 READY HOLD Time
3
-
3
-
ns
20 Input RISE/FALL Times
-
6
-
6
ns 0.8V to 2.0V
TIMING RESPONSES
12A Status/PEACK Active Delay
1
15
1
12
ns 1, (Notes 39, 42)
12B Status/PEACK Inactive Delay
1
16
1
13
ns 1, (Notes 39, 42)
13 Address Valid Delay
1
23
1
20
ns 1, (Notes 38, 39)
14 Write Data Valid Delay
0
27
0
24
ns 1, (Notes 38, 39)
15 Address/Status/Data Float Delay
0
25
0
24
ns 2, (Note 41)
16 HLDA Valid Delay
0
20
0
19
ns 1, (Notes 38, 39)
19 Address Valid to Status SETUP Time
9
-
12
-
ns 1, (Notes 39, 40)
NOTES:
37. Asynchronous inputs are INTR, NMl, HOLD, PEREQ, ERROR, and BUSY. This specification is given only for testing purposes, to assure
recognition at a specific CLK edge.
38. Delay from 1.0V on the CLK to 1.5V.
39. Output load: CL = 100pF.
40. Delay measured from address reaching 1.5V to status reaching 1.5V.
41. Delay from 1.0V on the CLK to Float (no current drive) condition.
42. Delay from 1.0V on the CLK to 1.5V.
AC Test Conditions
TEST CONDITION
1
2
IL (CONSTANT CURRENT SOURCE)
| 2.0mA |
-6mA (VOH to Float)
8mA (VOL to Float)
CL
100pF
100pF
43
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