ICM7226AIJL Intersil, ICM7226AIJL Datasheet
ICM7226AIJL
Specifications of ICM7226AIJL
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ICM7226AIJL Summary of contents
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... Ld PDIP CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 321-724-7143 Intersil and Design is a trademark of Intersil Americas Inc. 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 ...
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Pinouts CONTROL INPUT MEASUREMENT IN PROGRESS CONTROL INPUT MEASUREMENT IN PROGRESS NOTE: 1. For maximum frequency stability, connect to V ICM7226A, ICM7226B ICM7226A COMMON ANODE (CERDIP) TOP VIEW 1 40 INPUT INPUT B HOLD 3 38 BUF ...
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Functional Block Diagram EXT OSC INPUT OSC OSC INPUT SELECT OSC OUTPUT BUF OSC OUTPUT RESET INPUT INPUT INPUT A CONTROL LOGIC INPUT B INPUT CONTROL LOGIC FN FUNCTION CONTROL INPUT LOGIC 6 MEAS IN PROGRESS OUTPUT HOLD INPUT ICM7226A, ...
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Absolute Maximum Ratings Maximum Supply Voltage ( 6. Maximum Digit Output Current . . . . ...
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Electrical Specifications V = 5.0V PARAMETER Multiplex Inputs: Pins 1, 4, 20, 21 Input Low Voltage Input High Voltage Input Resistance Digit Driver: Pins 22-24, 26-30 Low Output ...
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Typical Performance Curves 200 5.0V DD 100 (V) OUT FIGURE 2. ICM7226B TYPICAL I 30 4.5 ≤ V ≤ 6. ...
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Typical Performance Curves FIGURE 8. f Description INPUTS A and B The signal to be measured is applied to INPUT A in frequency period, unit counter, frequency ratio and time interval modes. The other input signal to be measured is ...
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Table 1 shows the functions selected by each digit for these inputs. TABLE 1. MULTIPLEXED INPUT FUNCTIONS INPUT FUNCTION FUNCTION INPUT Frequency Pin 4 Period Frequency Ratio Time Interval Unit Counter Oscillator Frequency RANGE INPUT 0.01s/1 Cycle Pin 21 0.1s/10 ...
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Frequency - In this mode input A is counted by the Main Counter for a precise period of time. This time is determined by the time base oscillator and the selected range. For the 10MHz (or 1MHz) time base, the ...
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RST IN Input The RST IN is provided to reset the Main Counter, stop any measurement in progress, and enable the display latches, resulting in the all zero display suggested to have a capacitor at this input to ...
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Overflow Indication When overflow happens in any measurement it will be indicated on the decimal point of the digit 8. A separate LED indicator can be used. Figure 14 shows how to connect this indicator ...
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Display Considerations The display is multiplexed at a 500Hz rate with a digit time of 244µs. An interdigit blanking time of 6µs is used to prevent display ghosting (faint display of data from previous digit superimposed on the next digit). ...
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Test Circuit V = 5.0V DD INPUT A FUNCTION GENERATOR CONTROL INPUT 39pF FUNCTION GENERATOR 1 INPUT MEAS IN PROGRESS 4 FUNCTION 10K 5 STORE D1 BCD BCD ...
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Typical Applications The ICM7226 has been designed as a complete stand alone Universal Counter, or used with prescalers and other circuitry in a variety of applications. Since INPUT A and INPUT B are digital inputs, additional circuitry will be required ...
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3kΩ 74LS74 RESET 0.1 µ ...
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INPUT ECL11C90 CP QTTL CE MS 74LS00 ECL11C90 INPUT CP QTTL 10kΩ 10kΩ 74LS00 D4 V+ 10kΩ 0.1µF 2 FIGURE 22. 100MHz ...
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INPUT ECL11C90 CP QTTL FUNCTION V DD SWITCH OPEN FREQ CLOSED F PERIOD D1 IN CONT 2 CD4016 D8 IN CONT 2 0.1µF RESET 2 FIGURE 23. 100MHz FREQUENCY, PERIOD COUNTER ICM7226A, ICM7226B ...
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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 ...
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... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reli- able. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...