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參數(shù)資料
| 型號： | ICM7226BlPL |
| 廠商： | Intersil Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-Digit, Multi-Function, Frequency Counter/Timer |
| 中文描述： | 8位數(shù)字，多功能，頻率計(jì)數(shù)器/計(jì)時器 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 173K |
| 代理商： | ICM7226BLPL |
9-15
Features
CMOS Design for Very Low Power
Output Drivers Directly Drive Both Digits and
Segments of Large 8-Digit LED Displays
Measures Frequencies from DC to 10MHz; Periods
from 0.5
μ
s to 10s
Stable High Frequency Oscillator uses either 1MHz or
10MHz Crystal
Both Common Anode and Common Cathode Available
Control Signals Available for External Systems
Interfacing
Multiplexed BCD Outputs
Applications
Frequency Counter
Period Counter
Unit Counter
Frequency Ratio Counter
Time Interval Counter
Description
The ICM7226 is a fully integrated Universal Counter and
LED display driver. It combines a high frequency oscillator, a
decade timebase counter, an 8-decade data counter and
latches, a 7-segment decoder, digit multiplexer and segment
and digit drivers which can directly drive large LED displays.
The counter inputs accept a maximum frequency of 10MHz
in frequency and unit counter modes and 2MHz in the other
modes. Both inputs are digital inputs. In many applications,
amplification and level shifting will be required to obtain
proper digital signals for these inputs.
The ICM7226 can function as a frequency counter, period
counter, frequency ratio (f
A
/f
B
) counter, time interval counter
or as a totalizing counter. The devices require either a
10MHz or 1MHz quartz crystal timebase, or if desired an
external timebase can also be used. For period and time
interval, the 10MHz timebase gives a 0.1
μ
s resolution. In
period average and time interval average, the resolution can
be in the nanosecond range. In the frequency mode, the
user can select accumulation times of 0.01s, 0.1s, 1s and
10s. With a 10s accumulation time, the frequency can be dis-
played to a resolution of 0.1Hz. There is 0.2s between mea-
surements in all ranges. Control signals are provided to
enable gating and storing of prescaler data.
Leading zero blanking has been incorporated with frequency
display in kHz and time in
μ
s. The display is multiplexed at a
500Hz rate with a 12.2% duty cycle for each digit. The
ICM7226A is designed for common anode displays with typi-
cal peak segment currents of 25mA, and the ICM7226B is
designed for common cathode displays with typical segment
currents of 12mA. In the display off mode, both digit drivers
and segment drivers are turned off, allowing the display to
be used for other functions.
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
ICM7226AlJL
-25 to 85
40 Ld CERDIP
F40.6
ICM7226BlPL
-25 to 85
40 Ld PDIP
E40.6
August 1997
ICM7226A,
ICM7226B
8-Digit, Multi-Function,
Frequency Counter/Timer
File Number
3169.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
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| ICM7226D | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:TIMERS COUNTERS AND DISPLAY DRIVERS |
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| ICM7227BIJI | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:TIMERS COUNTERS AND DISPLAY DRIVERS |
| ICM7227CIPI | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:TIMERS COUNTERS AND DISPLAY DRIVERS |
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