ICM7217IJI Intersil, ICM7217IJI Datasheet
ICM7217IJI
Specifications of ICM7217IJI
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ICM7217IJI Summary of contents
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... PART TEMP. RANGE o NUMBER ( C) ICM7217AIPI - ICM7217CIPl - ICM7217IJI - lCM7217BlJl - 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. Programmable Up/Down Counter Description The ICM7217 is a four digit, presettable up/down counter with an onboard presettable register continuously compared to the counter ...
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Pinouts ICM7217 (CERDIP) COMMON ANODE TOP VIEW CARRY/BORROW 1 ZERO 2 3 EQUAL BCD I BCD I BCD I BCD I ICM7217 ICM7217B COUNT INPUT 8 STORE 9 UP/DOWN 10 LOAD REGISTER/OFF ...
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Absolute Maximum Ratings Supply Voltage ( ...
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Electrical Specifications PARAMETER Display Scan Free-running (SCAN Terminal Open Circuit) Oscillator Frequency Switching Specifications PARAMETER UP/DOWN Setup Time, t UCS UP/DOWN Hold Time, t UCH COUNT Pulse Width ...
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Timing Waveforms SCAN 10µs TYP FREE-RUNNING INTERNAL OSC OUTPUT D4 D3 INTERNAL (BCD AND SEGMENT D2 ENABLE INTERNAL D3 (COMMON ANODE DIGIT D2 STROBES) D1 UP/DOWN COUNT INPUT CARRY/BORROW EQUAL ZERO ICM7217 400µs TYP FREE-RUNNING INTERDIGIT BLANK FIGURE ...
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Timing Waveforms LOAD COUNTER (OR LOAD REGISTER) SCAN INTERNAL INPUT OPERATING OUTPUT MODE BCD I/O D OUT N = HIGH IMPEDANCE = THREE-STATE W/PULLDOWN Typical Performance Curves 300 4.5 ≤ V ≤ ICM7217 ICM7217B ...
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Typical Performance Curves -20 C ICM7217 60 ICM7217B OUT FIGURE 6. TYPICAL ISEG vs V 200 5.5V 150 ...
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Figure 1 shows the multiplex timing. The DISPLAY pin controls the display output using three level logic. The pin is self-biased voltage approximately / ( normal operation. When ...
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COUNT INPUT signal when UP/DOWN is high decremented when UP/DOWN is low. A Schmitt trigger on the COUNT INPUT provides hysteresis to prevent double triggering on slow rising edges and permits operation in noisy ...
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CD4069 1N4148 INPUT INPUT INPUT B INPUT A High High High Low Low High Low Low FIGURE 11C. CMOS OPEN DRAIN FIGURE 11. DRIVING 3-LEVEL INPUTS OF ICM7217 DISPLAY CONTROL 50kΩ D DIGIT LINE N ICM7217 ICM7217B FIGURE 12A. COMMON ...
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LCD DISPLAY ICM7211 SEGMENTS AND BACKPLANE FIGURE 14. LCD DISPLAY INTERFACE (WITH THUMBWHEEL SWITCHES) The lCM7217A and the ICM7217C ...
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When using the circuit as a programmable divider (÷ with equal outputs) a short time delay (about 1µs) is needed from the EQUAL output to the RESET input to establish a pulse of adequate duration. (See Figure 16). ...
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... Figure 13 can be used. LCD Display Interface The low-power operation of the ICM7217 makes an LCD interface desirable. The Intersil ICM7211 4-digit, BCD-to-LCD display driver easily interfaces to the ICM7217 as shown in Figure 14. Total system power consumption is less than 5mW. System timing margins can be improved by using capacitance to ground to slow down the BCD lines. The 10kΩ ...
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It is possible to use separate thumbwheel switches for presetting, but since the devices load data with the oscillator free-running, the multiplexing of the two devices is difficult to synchronize. Precision Frequency Counter/Tachometer The circuit shown in Figure 23 is ...
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TO D4 STROBE TO D1 STROBE BCD INPUTS OF ICM7217, ICM7217B FIGURE 17. THUMBWHEEL SWITCH/DIODE CONNECTIONS CARRY 1 2 ZERO 4 5 BCD I/O 6 ...
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10K DIS OUT 0.047µ 0.47µF C INVERTERS: CD40106B COUNT INPUT NANDS: CD4011B 300µs GATE 50µs STORE RESET ...
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RUN MIN/SEC STOP RUN HRS/MIN ICM7213 30pF (4V MAX 30pF 4.1943MHz CRYSTAL R < 75Ω S THUMBWHEEL SWITCHES 5959 V ELAPSED DD COUNTDOWN V ...
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COUNT INPUT CARRY OUT BCD OUTPUTS HIGH ORDER DIGITS ICM7217 8 9 UP/DOWN 21, 22 N.O. 14 RESET HIGH ORDER ICM7217 COMMON-ANODE LED DISPLAY CARRY/BORROW 4 DIGITS ...
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ICM7207A 10kΩ CRYSTAL f = 5.24288MHz R = 75Ω S INPUT FIGURE 23. PRECISION FREQUENCY COUNTER (MHz MAXIMUM) 400mV FULL SCALE INPUT + 0.1µF +5V 1 GND ...
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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 ...