商品型号： ICM7216D 库存编号： 6987 热门程度： 品牌： Intersil 外形封装： DIP-28 生产批号： 99+ 起售数量： 100 参 考 价： 存货数量： 1050 产品简述： 频率计数器/定时器 ,ICM7216D 免费资料： 下载Datasheet

ICM7216D简介:8-Digit, Multi-Function,Frequency Counters/Timers
Features All Versions
• Functions as a Frequency Counter (DC to 10MHz)
• Four Internal Gate Times: 0.01s, 0.1s, 1s, 10s in
Frequency Counter Mode
• Directly Drives Digits and Segments of Large Multiplexed
LED Displays (Common Anode and Common
Cathode Versions)
• Single Nominal 5V Supply Required
• Highly Stable Oscillator, Uses 1MHz or 10MHz Crystal
• Internally Generated Decimal Points, Interdigit Blanking,
Leading Zero Blanking and Overflow Indication
• Display Off Mode Turns Off Display and Puts Chip Into
Low Power Mode
• Hold and Reset Inputs for Additional Flexibility
Features ICM7216A and ICM7216B
• Functions Also as a Period Counter, Unit Counter,
Frequency Ratio Counter or Time Interval Counter
• 1 Cycle, 10 Cycles, 100 Cycles, 1000 Cycles in Period,
Frequency Ratio and Time Interval Modes
• Measures Period From 0.5ms to 10s
Features ICM7216D
• Decimal Point and Leading Zero Banking May Be
Externally Selected.
Description
The ICM7216A and ICM7216B are fully integrated Timer
Counters with LED display drivers. They combine a high
frequency oscillator, a decade timebase counter, an
8-decade data counter and latches, a 7-segment decoder,
digit multiplexers and 8-segment and 8-digit drivers which
directly drive large multiplexed LED displays. The counter
inputs have 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 ICM7216A and ICM7216B can function as a frequency
counter, period counter, frequency ratio (fA/fB) counter, time
interval counter or as a totalizing counter. The counter uses
either a 10MHz or 1MHz quartz crystal timebase. For period
and time interval, the 10MHz timebase gives a 0.1ms
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 displayed to a resolution of 0.1Hz in the least
significant digit. There is 0.2s between measurements in all
ranges.
The ICM7216D functions as a frequency counter only, as
described above.
All versions of the ICM7216 incorporate leading zero
blanking. Frequency is displayed in kHz. In the ICM7216A
and ICM7216B, time is displayed in ms. The display is
multiplexed at 500Hz with a 12.2% duty cycle for each digit.
The ICM7216A is designed for common anode displays with
typical peak segment currents of 25mA. The ICM7216B and
ICM7216D are designed for common cathode displays with
typical peak segment currents of 12mA. In the display off
mode, both digit and segment drivers are turned off,
enabling the display to be used for other functions.
Ordering Information

ICM7216D 时间:2008-1-8 10:25:00

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