Features n IEEE 802.3 Ethernet compatible n Discrete transformers and common mode chokes for flexible PCB layout n Pair with common mode choke SRF2012A-801Y for EMI reduction n Expanded temperature range: -40 to +85 C n RoHS compliant* SM453229-381N7Y - 10/100/1000 Base-T Chip LAN Transformer Electrical Specifications at 25 C Electrical Schematic Inductance 100 kHz, 0.1 V, 0 mADC 7 1 6 4 (Pin 1-2 & 3-4 / short 6-7) ........................................ 380 H min. 6 3 Inductance DC Bias 4 100 kHz, 0.1 V, 8 mA DC 5 3 (Pin 1-2 & 3-4 / short 6-7) ........................................ 350 H min. 2 Turns Ratio ( 3 %) 5 Pin 1-2 & 3-4 / short 6-7 ...............1 : 1 2 7 1 Insertion Loss (1-100 MHz) ........................................-1.5 dB max. TOP VIEW Capacitance (Pin 3-4) .............35 pF typ. Hi-Pot (Pin 1 to 6, short 3-4) .............................. 1500 VAC, 60 sec. Pulse Voltage............. 2400 V, 1.2/50 S Operating Temperature ......-40 to +85 C Storage Temperature .........-40 to +85 C Packaging ...................... 2000 pcs. / reel Product Dimensions 4.70 .20 1.00 0.20 2.70 0.20 1.00 0.20 (.185 .008) (.039 .008) (.106 .008) (.039 .008) 0.32 0.06 0.28 0.05 (.013 .002) (.011 .002) 0.18 0.05 0.40 0.08 (.007 .002) (.016 .003) 3.22 .20 (.127 .008) 0.36 0.06 0.52 0.10 1.42 0.20 3.22 0.20 (.014 .002) (.056 .008) (.020 .004) 0.85 0.16 (.127 .008) (.033 .006) 0.80 0.16 0.38 0.06 (.031 .006) (.015 .002) 1.42 0.20 2.90 MAX. (.056 .008) (.114) 0.60 0.10 (.024 .004) 0.24 0.04 1.00 0.20 (.009 .002) 0.32 0.06 (.039 .008) (.013 .002) 1.00 0.20 (.039 .008) 4.70 .20 (.185 .008) TOP VIEW MM DIMENSIONS: (INCHES) WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov * RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specicfi legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/dis.claimer.pdf SM453229-3811N7Y - 10/100/1000 Base-T Chip LAN Transformer 3312 - 2 mm SMD Trimming Potentiometer Recommended Pad Layout 5.00 (.197) 0.77 0.90 1.60 1.53 0.97 (.030) 0.33 (.035) (.063) (.060) (.038) (.013) 4 7 0.785 0.45 0.34 3 (.031) (.018) (.013) 1.230 6 (.048) 3.23 0.665 1.54 0.85 (.127) (.026) (.061) (.033) 0.28 1.61 0.85 0.835 (.011) (.063) (.033) (.033) 1.365 (.054) 0.37 2 0.645 (.015) (.025) 5 1 0.50 0.96 1.54 1.55 0.95 (.020) MM 0.27 DIMENSIONS: (.038) (.061) (.061) (.037) (.011) (INCHES) Soldering Profile NATURAL PRE-HEATING SOLDERING COOLING T (260 C / 10 seconds max.) P t (245 C / 20~40 seconds) p 217 200 60 ~ 150 seconds 150 60 ~ 180 seconds 480 seconds max. 25 Time (Seconds) REFLOW TIMES: 3 MAX. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Temperature (C)