Document 606-1 Miniature SMT Transformers These miniature transformers were developed for use with Maxim RS-232/RS-485 interface ICs, and are suitable for gate drive and other power applications. They were designed to work with the MAX250, MAX251, MAX253 and MAX845 for providing power to the isolated side of the interface, and are also speciefi d by Linear Technology, Sipex and others for use with their chipsets. They feature 1500 Vrms isolation between windings in a miniature surface mount package. Each transformer has a stainless steel cover that provides an excellent surface for automated placement. In addition to the standard parts shown, Coilcraft can produce custom transformers with voltage, inductance and DCR values to meet your specific requirements. For more information, contact Coilcraft. Volt-time Isolation Pri / sec Pri : sec 2 DCR max (Ohms) 5 Part Pri / sec Inductance product pri-sec capacitance Turns Power 1 3 4 number voltage min (H) typ (Vsec) pri sec (Vrms) typ (pF) ratio (W) Size Q4470-CL 5 V to 5 V 400 (1-3) 32 (1-3) 0.950 (1-3) 1.25 (6-4) 1500 (1-4) 0.87 1 CT : 1.3 CT 0.25 C S5394-CL 5 V to 10 V 400 (1-3) 32 (1-3) 0.950 (1-3) 0.950 (6-4) 1500 (1-4) 0.92 1 CT : 1 0.25 C U6982-CL 3.3 V to 5 V 59 (1-3) 22 (1-3) 0.700 (1-3) 1.800 (6-4) 1500 (1-4) 0.93 1 CT : 2.1 CT 0.75 C T6437-DL 5 V to 5V 1000 (1-4) 134 (1-4) 1.010 (1-2, 3-4) 1.955 (8-5) 1500 (1,3-8) 1.88 1 CT : 1 1.5 D S5499-DL 5 V to 24 V 160 (1-4) 48 (1-4) 0.540 (1-2, 3-4) 4.28 (8-7, 6-5) 1500 (1,3-8,6) 1.59 1 CT : 5 CT 1.0 D T6650-DL 5 V to 24 V 176 (2-3) 48 (2-3) 1.015 (2-3) 8.250 (7-6) 1500 (2-7) 1.25 1 : 5 1.0 D 1. When ordering, please specify packaging code: Chipset Q4470-CLD Linear Linear Maxim Maxim Maxim Sipex Sipex LT1952 LTC3900 250/251 253/845 3535E SP3222 SP3232 Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic Q4470-CL tape (Size C: 1000 per full reel Size D: 500 per full reel). S5394-CL B = Less than full reel. In tape, but not machine ready. U6982-CL To have a leader and trailer added ( 25 charge), use T6437-DL code letter D instead. S5499-DL 2. Volt-time product is based on core area, number of primary turns and T6650-DL 4800 Gauss flux density. 3. Capacitance measured from full primary to full secondary at 200 kHz. Q4470-CL U6982-CL S5394-CL 4. CT indicates center tap. 5. Calculated output power based on 150 kHz operating frequency. 11 6 1 6 1 6 Power varies depending on application. 6. Ambient temperature range: 40C to +85C 22 5 2 5 Pri Sec Pri Sec Pri 2 Sec 7. Storage temperature range: Component: 40C to +85C Tape and reel packaging: 40C to +80C 3 4 3 4 33 4 8. Resistance to soldering heat: Three reflows at >217C for 90 seconds (+260C 5C for 20 40 seconds), allowing parts to cool to room temperature between. T6437-DL S5499-DL T6650-DL 9. Electrical specifications at 25C. 1 8 8 2 1 7 Refer to Doc 362 Soldering Surface Mount Components before soldering. 2 7 2 Pri Sec Pri Sec Pri Sec 3 6 3 5 3 4 5 4 6 Document 606-1 Revised 05/06/09 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2013 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information.Document 606-2 Miniature SMT Transformers Dot above 0.260 C Size max pin 1 6,60 Q4470-CL, S5394-CL, U6982-CL 0.215 max 5,46 0.004/ 0,10 0.283 min 7,20 0.350 Recommended max 8,89 0.050 Land Pattern sq 1,27 1 6 0.023 0,60 0.275 max 6,99 0.100 0.100 2,54 2,54 4 1 3 0.375 0.039 9,53 min 1,0 Bottom View Weight 510 550 mg Terminations Tin-silver over tin over nickel over phos bronze Packaging 1000 per 13 reel Plastic tape: 16 mm wide, 0.34 mm thick, 12 mm pocket spacing, 5.33 mm pocket depth Dot above 0.344 D Size max pin 1 8,75 S5499-DL,T6437-DL,T6650-DL 0.215 max 5,46 0.004/ 0,10 0.415 min 10,55 0.500 0.500 max 12,70 12,70 0.075 1,905 8 0.023 1 0,60 0.050 1,27 0.400 Recommended max 10,16 Land Pattern 0.100 0.100 2,54 2,54 1 4 5 0.035 min 0,90 Bottom View Weight 0.98 1.1 g Terminations Tin-silver over tin over nickel over phos bronze Tape and reel 500 per 13 reel Plastic tape: 24 mm wide, 0.36 mm thick, 16 mm pocket spacing, 6.13 mm pocket depth Document 606-2 Revised 05/06/09 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2013 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information.