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Structure Product Type Dimensions diagram Block diagram Function
Silicon Monolithic Integrated Circuit IrDA SIR Encoder / Decoder BU92001KN : Figure-2 : Figure-3 IrDA Controller
1. UART interface 2. IrDA SIR Encode / Decode function 3. Communication rate of 2.4k 115.2kbps 4. VDD=2.5 3.5V ( Power supply voltage range) note) The IC isn't designed for endurance of the radiation.
Absolute maximum ratings (Ta=25C)
Parameter Symbol Vmax Vin Topr Tstg Limits 4.5 *1 -0.3 VDD+0.3 -25 85 -40 100 Units V V
Supply Voltage Input Voltage Operation Temperature Storage Temperature
*1) This applies to all pins basis ground pin(9pin).
Recommended Operating Conditions
Parameter Supply Voltage Clock frequency Symbol VDD fCLK Min. 2.5 24.0 Typ. 3.0 27.8 Max 3.5 30.0 Units V MHz
Status of this document The Japanese version of this document is the formal specification. A customer may use this translation version only for a reference to help reading the formal version. If there are any differences in translation version of this document, formal version takes priority.
REV. B
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Electrical characteristics (Ta=25C, VDD=3.0V, GND=0V)
Parameter Consumption Current1 Consumption Current2 High level input voltage Low level input voltage High level input current Low level input current High level output voltage Low level output voltage Symbol IDD1 IDD2 VIH VIL IIH IIL 0.8 MIN VDD TYP 0.1 2.0 0.2 MAX 3.0 4.0 VDD 10 10 0.6 Units uA mA V V uA uA V V IOH= 1mA IOL=1mA Condition All the input 0V, Output load-less Input PIN=0V, CLK=27.8MHz,
Output load-less
VOH1 VDD-0.6 VOL1 -
REV. B
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Dimensions Diagram (VQFN20)
Note) The dotted line part is not recommend mounting.
Fig.1
(Units:mm)
Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Terminal Name U_TXD U_RXD BRSET CLK CLKSEL0 CLKSEL1 GND CLK47OUT CLK2OUT IR_RXD IR_TXD VDD RST I/O I O I I I I 0 0 I O I Function UART TXD signal input UART TXD signal output N.C Setup of baud rate (active Hi) Clock input (27.8MHz) N.C Input clock selection Input clock selection Ground N.C The 1/47 clock output of the clock input The 1/2 clock output of the clock input N.C IrDA RXD signal input IrDA TXD signal output N.C Power supply voltage (2.5V 3.5V) Reset input (active Hi) N.C N.C Terminal Equivalent Circuit B A B B B B A A B A B -
Terminal equivalent circuit diagram
REV. B
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Notes for use
(1) Absolute Maximum Ratings We are careful enough for quality control about this IC. So, there is no problem under normal operation, excluding that it exceeds the absolute maximum ratings. However, this IC might be destroyed when the absolute maximum ratings, such as impressed voltages or the operating temperature range, is exceeded, and whether the destruction is short circuit mode or open circuit mode cannot be specified. Pleases take into consideration the physical countermeasures for safety, such as fusing, if a particular mode that exceeds the absolute maximum rating is assumed. (2) GND Potential Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. (3) Short circuit mode between terminals and wrong mounting In order to mount the IC on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can destroy the IC. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the IC can destroy (4) Operation in supply voltage range Functional Circuit operation is guaranteed within operation ambient temperature, as long as it is within operation supply voltage range. The electrical characteristics standard value cannot be guaranteed. However, there is no drastic variation in these values, as long as it is within operation supply voltage range.
REV. B
Appendix
Notes
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Appendix1-Rev3.0

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