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BU1572GUW Folha de dados(PDF) 11 Page - Rohm |
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BU1572GUW Folha de dados(HTML) 11 Page - Rohm |
11 / 13 page BU1572GUW, BU1573KV, BU1574KU Technical Note 11/12 www.rohm.com 2009.04- Rev.B © 2009 ROHM Co., Ltd. All rights reserved. (5)GND voltage Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient. (6)Short circuit between terminals and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. 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 ICs can break down. (7)Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. (8)Inspection with set PCB On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress. Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the transportation and the storage of the set PCB. (9)Input terminals In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (10)Ground wiring pattern If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well. (11)External capacitor In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc. ●Order Model Name Selection ●Tape and Reel information Package type GUW: VBGA063W050 KV: VQFP64 KU: UQFP64 B U 1 5 7 2 G U ROHM model name Product number Taping model name E2: Embossed reel tape None: Tray E 2 W Direction of feed Tape Quantity Direction of feed Embossed carrier tape (With dry pack) 2500pcs E2 (The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand.) <Tape and Reel information> Reel 1Pin 1234 1234 1234 1234 1234 1234 (Unit:mm) VBGA063W050 <Dimension> ※When you order , please order in times the amount of package quantity. |
Nº de peça semelhante - BU1572GUW |
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Descrição semelhante - BU1572GUW |
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