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參數(shù)資料
| 型號： | ICM7226BIPL |
| 廠商： | INTERSIL CORP |
| 元件分類： | 計(jì)數(shù)器 |
| 英文描述： | DISPLAY DRIVER COUNTER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 10/19頁 |
| 文件大?。?/td> | 556K |
| 代理商： | ICM7226BIPL |
18
Figure 23 shows the use of a CD4016 analog multiplexer to
multiplex the digital outputs back to the FUNCTION Input.
Since the CD4016 is a digitally controlled analog transmission
gate, no level shifting of the digit output is required. CD4051s
or CD4052s could also be used to select the proper inputs for
the multiplexed input on the ICM7226 from 2-bit or 3-bit digital
inputs. These analog multiplexers may also be used in sys-
tems in which the mode of operation is controlled by a micro-
processor rather than directly from front panel switches. TTL
multiplexers such as the 74LS153 or 74LS251 may also be
used, but some additional circuitry will be required to convert
the digit output to TTL compatible logic levels.
The circuit shown in Figure 24 can be used in any of the
circuit applications shown to implement a single measure-
ment mode of operation. This circuit uses the STORE output
to put the ICM7226 into a hold mode. The HOLD input can
also be used to reduce the time between measurements.
The circuit shown in Figure 25 puts a short pulse into the
HOLD input a short time after STORE goes low. A new mea-
surement will be initiated at the end of the pulse on the
HOLD input. This circuit reduces the time between measure-
ments to about 40ms from 200ms; use of the circuit shown in
Figure 25 on the circuit shown in Figure 21 will reduce the
time between measurements from 800ms to about 160ms.
Using LCD Display
Figure 26 shows the ICM7226 being interfaced to LCD dis-
plays, by using its BCD outputs and 8 digit lines to drive two
ICM7211 display drivers.
FIGURE 24. SINGLE MEASUREMENT CIRCUIT FOR USE WITH
ICM7226
FIGURE 25. CIRCUIT FOR REDUCING TIME BETWEEN
MEASUREMENTS
FIGURE 26. 10MHz UNIVERSAL COUNTER SYSTEM WITH LCD DISPLAY
VDD
100k
STORE
OUTPUT
S1
VDD
100k
S2
VDD
100k
S3
HOLD
INPUT
SWITCH
FUNCTION
S1
Open-Single Meas Mode Enabled
S2
Closed-Initiate New Measurement
S3
Closed-Hold Input
VDD
STORE
OUTPUT
HOLD
INPUT
100k
100pF
HOLD SWITCH
100k
N.O.
ICM7226A
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ICM7211
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28 SEGMENT LINES
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ICM7226A, ICM7226B
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICM7226BIPL WAF | 制造商:Intersil Corporation 功能描述: |
| ICM7226BLPL | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:8-Digit, Multi-Function, Frequency Counter/Timer |
| ICM7226D | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:TIMERS COUNTERS AND DISPLAY DRIVERS |
| ICM7227 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:N-CHANNEL JFET |
| ICM7227AIPI | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:TIMERS COUNTERS AND DISPLAY DRIVERS |
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