Chip Attenuator Chip Attenuator 0404 Type: EXB24AT (Unbalanced p type) Type: EXB24AB (Balanced O type) n Features EXB24AT type : Unbalanced p type l Unbalanced p type attenuator circuit in one chip(1.0 mm 1.0 mm) l Mounting occupation area reduction : about 50 % reduction compared with an attenuator circuit consisting of three 0402 chip resistors, almost equal to an attenuator circuit consisting of three 0201 chip resistors l Mounting cost reduction : Mounting times 3 times O 1 time l Attenuation : 1 dB to 10 dB EXB24AB type : Balanced O type l Balanced O type attenuator circuit in one chip(1.0 mm 1.0 mm) l Mounting occupation area reduction : about 64 % reduction compared with an attenuator circuit consisting of four 0402 chip resistors, about 26 % reduction compared with attenuator circuit consisting of four 0201 chip resistors l Mounting cost reduction : Mounting times 4 times O 1 time l Attenuation : 0 dB to 10 dB n Recommended Applications l Attenuation / level control / impedance matching of high frequency signals of communication equipment; cellular phones(GSM, CDMA, PDC, etc.), PHS, PDA, for example. Chip Attenuator n Explanation of Part Numbers l EXB24AT type : Unbalanced p type 1 2 3 4 5 6 7 8 9 10 11 12 E X B 2 4 A T 3 A R 3 X l EXB24AB type : Balanced O type 1 2 3 4 5 6 7 8 9 10 11 12 E X B 2 4 A B 3 G R 8 X n Attenuation-Frequency Characteristics (typical) (EXB24AT type) Chip Attenuator n Construction EXB24AT EXB24AB EXB24AT EXB24AB n Circuit Configuration n Dimensions (not to scale) EXB24AT Dimensions (mm) Dimensions (mm) EXB24AB L W T A B 1.000.10 1.00+0.10 0.350.10 0.330.10 0.150.10 C P(typical value) 0.250.10 0.65 <Marking Configuration> The bar marking for recognizing terminal direction is located on the side of terminal 4. Dimensions (mm) Dimensions (mm) L W T A B 1.000.10 1.00+0.10 0.350.10 0.330.10 0.150.10 C P(typical value) 0.300.10 0.65 Chip Attenuator n Ratings Attenuation Value EXB24AT 1 dB, 2 dB, 3 dB, 4 dB, 5 dB, 6 dB, 10 dB* Attenuation Value Tolerance 1 dB, 2 dB, 3 dB, 4 dB, 5 dB : 0.3 dB : 0.5 dB 6 dB, 10 dB Item Frequency Range VSWR 0 dB to 3 dB : 0.8 dB : 1.0 dB 10 dB : 2.0 dB 100 W, 200 W, 300 W * 0.04 W /package 0.04 W /package DC to 2 GHz DC to 2.5 GHz 1.2 Max.(typical value) 1.3 Max. (Voltage Standing Wave Ratio) 6 dB 50 W* Characteristic Impedance Power Rating EXB24AB 0 dB, 1 dB, 2 dB, 3 dB, 6 dB, 10 dB* 1.5 Max.(0 dB, typical value) Number of Resistors 3 resistors 4 resistors Number of Terminals 4 terminals 4 terminals -55 C to +125 C -55 C to +125 C Category Temperature Range (Operating Temperature Range) *Please inquire about the other attenuator value / characteristics impedance. Power Derating Curve For resistors operated in ambient temperature above 70C, power rating shall be derated in accordance with the figure on the right. n Packaging Methods l Standard Quantity Type (inches) EXB24AT/AB (0404) Thickness (mm) Weight (mg) Punched (Paper) Taping (2 mm Pitch) 0.35 1.1 10000 pcs./reel n Taping Dimensions l Taping Reel Dimensions fA (mm) 180.0 03.0 l Punched (Paper) Taping fB 60 min. fC 13.01.0 W 9.01.0 T Dimensions 11.42.0 (mm) Dimensions (mm) A B W F 1.20 1.20 8.00 3.50 P0 P1 P2 4.00 2.00 2.00 0.05 0.10 0.05 0.10 0.20 0.05 0.05 fD 0 1.50 +0.10 0 E 1.750.10 T 0.450.10 <Product direction in the chip pocket of carrier tape> Products shall be sealed so as to locate the terminal 1 and 2 on the side of feeding direction in the chip pocket. Chip Attenuator nRecommend Land Pattern Dimensions (mm) a 0.5 b 0.35 to 0.4 c 0.3 d 1.4 to 1.5 Safety Precautions 1. Soldering Recommendation for soldering method is noted below. lReflow soldering Precautions and recommendations are described below. lPlease inquire with us when you use the different conditions. lPlease measure a temperature of terminations and study the solderability for every type of board before using. Rising temperature I Preheating Rising temperature II Main heating Gradual cooling The normal to Preheating temperature 30 s to 60 s 140 C to 160 C 60 s to 120 s Preheating to 200 C 20 s to 40 s (cf. The limits of resistance to reflow soldering heat) 200 C to 100 C 1 C/s to 4 C/s (Reflow soldering shall be within two times.) l Flow soldering We cannot recommend the flow soldering, because a solder bridge may occur owing to narrow 0.65 mm pitch. l Iron soldering 1Solder at 280 C max. and 3 seconds max. with the soldering iron tip. 2The soldering iron tip shall not touch the protective coating of the part. l Use rosin type flux. Do not use high-activity flux (the chlorine content is 0.2 wt % or more). l Allow enough preheating so that the difference of soldering temperature and temperature of surface of the part is 100 C or less. This temperature difference shall be kept in rapid cooling by immersion into solvent. l Use of more solder results in more mechanical stress to the part resulting in cracking or impaired characteristics. Avoid excessive amount of solder. 2. Cleaning l Residual flux after board washing may cause solder migration. Carefully check the status of board washing. Study the type and amount of flux to be used when no washing is made. Study the type of water-soluble flux and cleaning agent and drying condition when water washing is done. Confirm they will not cause any trouble. 3. Others l Take necessary precautions to avoid any abnormal stress caused by bending of board. l Do not use the product in dewy atmosphere.