82C84A
CMOS Clock Generator Driver
March 1997
Features
Description
The Intersil 82C84A is a high performance CMOS Clock Generator-
driver which is designed to service the requirements of both CMOS
and NMOS microprocessors such as the 80C86, 80C88, 8086 and
the 8088. The chip contains a crystal controlled oscillator, a divide-by-
three counter and complete “Ready” synchronization and reset logic.
• Generates the System Clock For CMOS or NMOS
Microprocessors
• Up to 25MHz Operation
• Uses a Parallel Mode Crystal Circuit or External
Frequency Source
Static CMOS circuit design permits operation with an external fre-
quency source from DC to 25MHz. Crystal controlled operation to
25MHz is guaranteed with the use of a parallel, fundamental mode
crystal and two small load capacitors.
• Provides Ready Synchronization
• Generates System Reset Output From Schmitt Trigger
Input
All inputs (except X1 and RES) are TTL compatible over tempera-
ture and voltage ranges.
• TTL Compatible Inputs/Outputs
• Very Low Power Consumption
• Single 5V Power Supply
Power consumption is a fraction of that of the equivalent bipolar cir-
cuits. This speed-power characteristic of CMOS permits the
designer to custom tailor his system design with respect to power
and/or speed requirements.
Ordering Information
• Operating Temperature Ranges
o
o
PART
PKG.
NO.
- C82C84A . . . . . . . . . . . . . . . . . . . . . . . . .0 C to +70 C
NUMBER
TEMP. RANGE
PACKAGE
o
o
- I82C84A . . . . . . . . . . . . . . . . . . . . . . . . -40 C to +85 C
o
o
CP82C84A
IP82C84A
0 C to +70 C
18 Ld PDIP
E18.3
o
o
- M82C84A . . . . . . . . . . . . . . . . . . . . . . -55 C to +125 C
o
o
-40 C to +85 C
E18.3
o
o
CS82C84A
IS82C84A
0 C to +70 C
20 Ld PLCC
N20.35
N20.35
o
o
-40 C to +85 C
o
o
CD82C84A
ID82C84A
0 C to +70 C
18 Ld CERDIP F18.3
o
o
-40 C to +85 C
F18.3
F18.3
o
o
MD82C84A/B
8406801VA
MR82C84A/B
84068012A
-55 C to +125 C
SMD#
-55 C to +125 C 20 Pad CLCC J20.A
SMD# J20.A
F18.3
o
o
Pinouts
82C84A (PDIP, CERDIP)
82C84A (PLCC, CLCC)
TOP VIEW
TOP VIEW
CSYNC
PCLK
AEN1
RDY1
1
2
3
4
5
6
7
8
9
18
V
CC
17 X1
3
2
1
20 19
16 X2
18
17
X2
4
5
6
7
8
RDY1
15 ASYNC
ASYNC
READY
RDY2
AEN2
NC
14
EFI
READY
RDY2
16 EFI
13 F/C
15
14
F/C
NC
12 OSC
11 RES
10 RESET
AEN2
CLK
GND
9
10 11 12 13
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
File Number 2974.1
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