JT9674-AS

The JT9674-AS is a kind of single-chip CMOS LSI for counters capable of directly driving a 5-digit LCD. The JT9674-AS is designed for pedometers and counters. There are some features of JT9674-AS as follows: (1)32.768 kHz crystal oscillator; (2)counts up to 99999; (3)1/3 duty LCD drive, 5-digit display; (4)low current consumption (Isup=3.0A max); (5)voltage doubler circuit (two 0.1F-external capacitors).

The following is about the maximum ratings of JT9674-AS: (1)supply voltage 1, VSS1-VDD: -0.3 to 0.2 V; (2)supply voltage 2, VSS2-VDD: -4.5 to 0.2 V; (3)input voltage 1, VIN1: VSS1-0.2 to VDD+0.2 V; (4)input voltage 2, VIN2: VSS2-0.2 to VDD+0.2 V; (5)output voltage 1, VOUT1: VSS1-0.2 to VDD+0.2 V; (6)output voltage 2, VOUT2: VSS2-0.2 to VDD+0.2 V; (7)operating temperature, Topr: -10 to 60; (8)storage temperature, Tstg: -40 to 125.

Then is about the electrical characteristics of JT9674-AS (referenced to VDD=0 V, VSS1=-1.55 V, VSS2=-3.0 V, CG=20 pF, CD=built-in (10 pF), CIMAX=21 k, FO=32768 Hz): (1)output current segment segment, IOH1: -0.5 A max at VOH1=-0.2 V; (2)output current segment, IOL1: 0.5 A min at VOL1=-2.8 V; (3)output current common, IOH2: -4.0 A max at VOH2=-0.2 V ; (4)output current common, IOL2: 4.0 A min at VOL2=-2.8 V; (5)input current buzzer, IIH3: -100A max at VSS1=-1.25 V, VSS2=-2.8 V, VOH3=-0.5 V; (6)input current buzzer, IIL3: 100A min at VSS1=-1.25 V, VSS2=-2.8 V, VOL3=-0.75 V.