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BU2872AK 数据表(PDF) 2 Page - Rohm |
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BU2872AK 数据表(HTML) 2 Page - Rohm |
2 / 4 page 2 Standard ICs BU2872AK •Pin descriptions 44 6 5 8 9 27 1 ~ 4 10 ~ 13 42 ~ 39 26, 28 ~ 31 37 ~ 32 15 ~ 25 7, 43 14, 38 Pin No. Pin I / O VDD I I / O I I O I I O I O O O I I Connected to the power supply of the system Connected to the oscillation capacitor Connected to the ground of the system Serial data input starting from MSB Serial data output starting from MSB Serial data read at rising edge Serial initialization at "L", effective at "H" Output pin for segment Output: Pch open drain + pull-down resistance Pull-down resistance connection for FLP driver Output pin for grid Output: Pch open drain + pull-down resistance Segment / grid output selectable pin Output: Pch open drain + pull-down resistance Output pin for LED; output is CMOS output Data input pin for key scanning General-purpose input pin Input data sent to microcomputer in serial format OSC VSS SI SO SCK CS VEE Power supply pin 1 Oscillation pin GND pin Serial data input Serial data output Serial clock input Serial chip select High withstanding voltage output pin for segment Power supply pin 2 High withstanding voltage output pin for grid High withstanding voltage output pin for segment / grid Output pin for LED Key data input pin General-purpose input pin S1 ~ S11 G1 ~ G6 L1 ~ L4 K1 ~ K4 SW1 ~ SW4 Function S12 / G11 ~ S16 / G7 Name •Absolute maximum ratings (Ta = 25°C, VSS = 0V) Parameter Symbol Limits Unit VDD V VEE VDD + 0.3 ~ VDD – 35 V VIN – 0.3 ~ VDD + 0.3 V Pd mW Topr °C Tstg °C Applied voltage 1 Applied voltage 2 Input voltage Power dissipation Operating temperature Storage temperature 850∗ Note) Operation is not guaranteed at these values. Power dissipation is reduced by 8.5mW for each increase in Ta of 1 °C over 25°C. ∗ When mounted on a 70mm × 70mm × 1.6mm glass epoxy board – 25 ~ + 75 – 55 ~ + 125 – 0.3 ~ + 7.0 •Recommended operating conditions (Ta = 25°C, VSS = 0V) Parameter Symbol Min. Typ. Max. Unit Operating power supply voltage 1 Operating power supply voltage 2 VDD 4.5 5.0 5.5 V VEE VDD – 32 VDD – 30 VDD – 0V |
类似零件编号 - BU2872AK |
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类似说明 - BU2872AK |
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