ICM7226B Intersil Corporation, ICM7226B Datasheet
ICM7226B
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ICM7226B Summary of contents
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... The PKG. ICM7226A is designed for common anode displays with typi- PACKAGE NO. cal peak segment currents of 25mA, and the ICM7226B is F40.6 designed for common cathode displays with typical segment currents of 12mA. In the display off mode, both digit drivers E40.6 and segment drivers are turned off, allowing the display to be used for other functions ...
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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 HOLD INPUT BUF OSC OUT FUNCTION (NOTE 1) STORE 5 36 OSC OUT BCD 4 ...
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... 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, ICM7226B 8 DECODER DIGIT DRIVERS 3 STORE 4 100Hz 10 OR AND RESET 5 10 LOGIC RESET MAIN EN COUNTER OVERFLOW ...
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... High Output Current, Pins 5-7, 17, 18, 32, H High Output Current, Pins 3, 38 ICM7226A Segment Driver: Pins 8-11, 13-16 Low Output Current High Output Current ICM7226A, ICM7226B Thermal Information Thermal Resistance (Typical, Note 2) CERDIP Package . . . . . . . . . . . . . . . . PDIP Package . . . . . . . . . . . . . . . . . . . Maximum Junction Temperature +0. -0.3V CERDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 ...
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... INPUT B xxxxxxxxxxxxxx NOTE range is set to 1 event, first and last measured interval will coincide. FIGURE 1. WAVEFORMS FOR TIME INTERVAL MEASUREMENT (OTHERS ARE SIMILAR, BUT WITHOUT PRIMING PHASE) ICM7226A, ICM7226B Unless Otherwise Specified (Continued) A TEST CONDITIONS V = +1.0V ...
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... V 6. (V) DD OUT FIGURE 4. ICM7226B TYPICAL I SEG 200 V = 5.0V DD 150 100 (V) OUT FIGURE 6. ICM7226B TYPICAL I ICM7226A, ICM7226B 300 4 5.5V DD 200 V = 4.5V DD 100 FIGURE 3. ICM7226A TYPICAL I DIGIT OUT - ...
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... FUNCTION = FREQUENCY, FREQUENCY RATIO, UNIT COUNTER MEASURED INTERVAL 4.5V INPUT A OR INPUT B 0.5V 250ns MIN FIGURE 10. WAVEFORM FOR GUARANTEED MINIMUM f AND f (MAX) FOR FUNCTION = PERIOD AND A TIME INTERVAL ICM7226A, ICM7226B (Continued) f (MAX) FREQUENCY UNIT COUNTER, A FREQUENCY RATIO MODES f (MAX) f (MAX) PERIOD A B TIME INTERVAL MODES ...
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... EXTERNAL OSCILLATOR INPUT A FIGURE 11. SIMPLIFIED BLOCK DIAGRAM OF FUNCTIONS IMPLEMENTATION ICM7226A, ICM7226B The implementation of different functions is done by routing the different signals to two counters, called “Main Counter” and “Reference Counter”. A simplified block diagram of the device for functions realization is shown in Figure 11. Table 2 ...
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... Figure 19). The direction of diodes depends on the device version, common anode or common cathode. For maximum noise immunity at this input, in addition to the 10K resistor which was mentioned before, ICM7226A, ICM7226B a 39pF to 100pF capacitor should also be placed between this input and the V DD ...
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... D8 (MSD (LSD). The pos- itive going (ICM7226A, common anode) or the negative going (ICM7226B, common cathode) digit drive signals lag the BCD data This starting edge of each digit drive sig- nal should be used to externally latch the BCD data. Each BCD output drives one low power Schottky TTL load ...
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... OR LOW Following the priming procedure (when in single event or 1 cycle range) the device is ready to measure one (only) event. ICM7226A, ICM7226B When timing repetitive signals not necessary to “prime” the lCM7226A and lCM7226B as the first alternating signal states automatically prime the device. See Figure 1. ...
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... To increase the light output from the displays, V increased to 6.0V. However, care should be taken to see that maximum power and current ratings are not exceeded. The SEGment and Digit outputs in both the ICM7226A and ICM7226B are not directly compatible with either TTL or 0 FREQUENCY MEASURE 0.01s 2 0 ...
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... RESET LED DP OVERFLOW INDICATOR D8 D8 DEVICE ICM7226A ICM7226B NOTE: Overflow will be indicated on the decimal point output of digit 7. ICM7226A, ICM7226B DISPLAY EXT OSC IN FUNCTION GENERATOR V SS 10k 40 HOLD BUF OSC OUT 10MHz 35 CRYSTAL ...
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... D8 D7 ICM7226A, ICM7226B For input frequencies up to 40MHz, the circuit shown in Figure 21 can be used to implement a frequency and period counter. To obtain the correct value when measuring frequency and period necessary to divide the 10MHz oscillator frequency down to 2.5MHz. In doing this the time between measurements is lengthened to 800ms and the dis- play multiplex rate is decreased to 125Hz ...
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... 74LS74 RESET 0 FIGURE 21. 40MHz FREQUENCY, PERIOD COUNTER ICM7226A, ICM7226B HOLD 39pF ...
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... QTTL CE MS 74LS00 ECL11C90 INPUT CP QTTL 10k F V+ 10k 74LS00 D4 V+ 10k OVERFLOW FIGURE 22. 100MHz MULTI-FUNCTION COUNTER ICM7226A, ICM7226B 10k 39pF 10k ICM7226A 11 30 ...
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... ECL11C90 CP QTTL FUNCTION V DD SWITCH OPEN FREQ F CLOSED PERIOD D IN OUT CONT 2 CD4016 D7 IN CONT 2 OUT 0.1 F RESET INPUT 2 FIGURE 23. 100MHz FREQUENCY, PERIOD COUNTER ICM7226A, ICM7226B 39pF 10k 10k 10k ...
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... D5 FIGURE 26. 10MHz UNIVERSAL COUNTER SYSTEM WITH LCD DISPLAY ICM7226A, ICM7226B 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 ...
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... For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 724-7000 FAX: (407) 724-7240 ICM7226A, ICM7226B EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ...