MD82C284-12/883 INTERSIL [Intersil Corporation], MD82C284-12/883 Datasheet - Page 4

• Manufacturer Part Number: MD82C284-12/883
• Description: Clock Generator and Ready Interface for 80C286 Processors
• Manufacturer: INTERSIL [Intersil Corporation]

Device Guaranteed and 100% Tested. A.C. timings are referenced to 0.8V and 2.0V points of the signals as illustrated in datasheet wave-
forms, unless otherwise specified. (Continued)
NOTES:
NOTES:
1. VCC = 4.5V and 5.5V unless otherwise specified. CLK loading: CL = 100pF.
3. This is an asychronous input. This specification is given for testing purposes only, to assure recognition at a specific CLK edge.
4. The pull-up resistor value for the READY pin is 620Ω with the rated 150pF load.
5. t16 refers to any allowable CLK period.
6. When using a crystal with the recommended capacitive loading, CLK output HIGH and LOW times are guaranteed to meet 80C286 re-
7. Measured from 1.0V on the CLK to 0.8V on the RES waveform for RES active, and to 4.2V on the RES waveform for RES inactive.
8. Input test waveform characteristics: VIL= 0.0V, VIH = 4.5V.
Input Capacitance
EFI HIGH to CLK
LOW Delay
EFI LOW to CLK
HIGH Delay
CLK Rise Time
CLK Fall Time
X1 HIGH to CLK
1. The parameters listed in Table 3 are controlled via design or process parameters and are not directly tested. These parameters are char-
2. Measured from 3.2V on the EFI waveform to 1.0V on the CLK.
3. Measured from 0.8V on the EFI waveform to 3.6V on the CLK.
4. Measured from 3.6V on the X1 input to 3.6V on the CLK.
2. With the internal crystal oscillator using recommended crystal and capacitive loading; or with the EFI input meeting specifications t1 and t2.
PARAMETER
PARAMETER
The recommended crystal loading for CLK frequencies of 8MHz to 20MHz are 25pF from pin X1 to GND, and 15pF from pin X2 to GND; for
CLK frequencies from 20MHz to 25MHz the recommended loading is 15pF from pin X1 to GND, and 15pF from X2 to GND. These recom-
mended values are ±5pF and include all stray capacitance. Decouple VCC and GND as close to the 80C284/883 as possible.
quirements.
acterized upon initial design and after major process and/or design changes.
TABLE 2. 82C284/883 A.C. ELECTRICAL PERFORMANCE SPECIFICATIONS (Continued)
SYMBOL
SYMBOL
Initial Test
Interim Test
CONFORMANCE GROUPS
t15A
t15B
CIN
t19
t20
t27
TABLE 3. 82C284/883 ELECTRICAL PERFORMANCE SPECIFICATIONS
FREQ = 1MHz, All
measurements are
referenced to de-
vice GND
1.0V to 3.6V,
CL = 100pF
3.6V to 1.0V,
CL = 100pF
CONDITIONS
CONDITIONS
(NOTE 1)
TABLE 4. APPLICABLE SUBGROUPS
SUBGROUP
GROUP A
NOTES
1, 2
1, 3
1, 4
82C284/883
1
1
1
100%/5004
100%/5004
METHOD
4
-55
-55
-55
-55
-55
TEMPERATURE
TEMPERATURE
o
o
o
o
o
C ≤ T
C ≤ T
C ≤ T
C ≤ T
C ≤ T
T
A
= +25
A
A
A
A
A
≤ +125
≤ +125
≤ +125
≤ +125
≤ +125
o
C
o
o
o
o
o
C
C
C
C
C
SUBGROUPS
MIN
MIN
1, 7, 9
-
-
-
-
-
-
10MHz
10MHz
-
MAX
MAX
10
30
35
35
8
8
MIN
MIN
-
-
-
-
-
-
12MHz
12MHz
MAX
MAX
10
25
30
30
8
8
UNITS
UNITS
pF
ns
ns
ns
ns
ns