(China (Mainland))
Product Summary
The HD74LS247P is a BCD-to-Seven-Segment Decoder / Driver (with three-state outputs). It can be used interchangeably in present or future designs to offer designers a choice between two indicator fonts. The HD74LS247P composes the 6 and the 9 with tails. Composition of all other characters, including display patterns for BCD inputs above nine, is identical. The HD74LS247P features active-low outputs designed for driving indicators directly. All of the circuits have full ripple-blanking input / output controls and a lamp test input.
Parametrics
HD74LS247P absolute maximum ratings: (1)Supply voltage, VCC: 7 V; (2)Input voltage, VIN: 7 V; (3)Output current (tw ≤ 1ms, duty cycle ≤ 10%), IO (peak): 200 mA; (4)Output current (off-state), IO (off): 1 mA; (5)Operating temperature, Topr: –20 to +75℃; (6)Power dissipation, PT: 400 mW; (7)Storage temperature, Tstg: –65 to +150℃.
Features
HD74LS247P features: (1)Input voltage, VIH: 2.0V min; VIL: 0.8 V max; (2)Output voltage, BI/RBO, VOH: 2.4V min; BI/RBO, VOL: 0.4V; (3)Short-circuit output current, BI/RBO, IOS: –0.3 to -2 mA; (4)Supply current, ICC: 7mA typ; 13 mA max; (5)Input clamp voltage, VIK: –1.5 V.
Diagrams
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