82C54
CMOS Programmable Interval Timer
The 82C54 is a high performance CMOS Programmable
Interval Timer manufactured using an advanced 2 micron
CMOS process.
The 82C54 has three independently programmable and
functional 16-bit counters, each capable of handling clock
input frequencies of up to 8MHz (82C54) or 10MHz
(82C54-10) or 12MHz (82C54-12).
The high speed and industry standard configuration of the
82C54 make it compatible with the 80C86, 80C88, and
80C286 CMOS microprocessors along with many other
industry standard processors. Six programmable timer
modes allow the 82C54 to be used as an event counter,
elapsed time indicator, programmable one-shot, and many
other applications. Static CMOS circuit design insures low
power operation.
The advanced CMOS process results in a significant
reduction in power with performance equal to or greater than
existing equivalent products.
Pinouts
82C54 (PDIP, CERDIP)
TOP VIEW
D7 1
D6 2
D5 3
D4 4
D3 5
D2 6
D1 7
D0 8
CLK 0 9
OUT 0 10
GATE 0 11
GND 12
24 VCC
23 WR
22 RD
21 CS
20 A1
19 A0
18 CLK 2
17 OUT 2
16 GATE 2
15 CLK 1
14 GATE 1
13 OUT 1
DATASHEET
FN2970
Rev.6.01
Jul 15, 2020
Features
• 8MHz to 12MHz Clock Input Frequency
• Compatible with NMOS 8254
- Enhanced Version of NMOS 8253
• Three Independent 16-Bit Counters
• Six Programmable Counter Modes
• Status Read Back Command
• Binary or BCD Counting
• Fully TTL Compatible
• Single 5V Power Supply
• Low Power
- ICCSB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10µA
- ICCOP . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA at 8MHz
• Operating Temperature Ranges
- CX82C54 . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
- IX82C54 . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
- MD82C54 . . . . . . . . . . . . . . . . . . . . . . . -55°C to +125°C
• Pb-Free Plus Anneal Available (RoHS Compliant)
82C54 (PLCC/CLCC)
TOP VIEW
4 3 2 1 28 27 26
D4 5
D3 6
D2 7
D1 8
D0 9
CLK 0 10
NC 11
25 NC
24 CS
23 A1
22 A0
21 CLK2
20 OUT 2
19 GATE 2
12 13 14 15 16 17 18
FN2970 Rev.6.01
Jul 15, 2020
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