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TC820CLW Datasheet(PDF) 5 Page - Microchip Technology |
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TC820CLW Datasheet(HTML) 5 Page - Microchip Technology |
5 / 28 page © 2002 Microchip Technology Inc. DS21476B-page 5 TC820 TCZS Zero Reading Drift — — — — VIN =0V —0.2 —— 0°C ≤ TA ≤ +70°C —1 — — -40°C ≤ T A ≤ +85°C TCFS Scale Factor Temperature Coefficient —— — — VIN =399mV —1 5 ppm/°C 0°C ≤ TA ≤ +70°C — 5 — ppm/°C -40°C ≤ TA ≤ +85°C Ext Ref = 0ppm/°C IS Supply Current — 1 1.5 mA VIN =0V Peak-to-Peak Backplane Drive Voltage 4.25 4.7 5.3 V VS =9V VDISP =DGND Buzzer Frequency — 5 — kHz FOSC =40kHz Counter TIme-Base Period — 1 — Second FOSC =40kHz Low Battery Flag Voltage 6.7 7 7.3 V VDD to VSS VIL Input Low Voltage — — DGND + 1.5 V VIH Input High Voltage VDD –1.5 — — V VOL Output Low Voltage, UR, OR Outputs VDD –1.5 — DGND + 0.4 V IL =50µA Control Pin Pull-down Current — 5 — µAV IN =VDD TC820 ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: VS =9V, TA = 25°C, unless otherwise specified. Symbol Parameter Min Typ Max Units Test Conditions Note 1: Input voltages may exceed the supply voltages provided that input current is limited to ±100 µA. Current above this value may result in invalid display readings, but will not destroy the device if limited to ±1mA. 2: Dissipation ratings assume device is mounted with all leads soldered to printed circuit board. |
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