1638 & 1639 www.murata-ps.com Token Ring Isolators for IEEE 802.5 Systems SELECTION GUIDE Order Code Turns Ratio 1638C 1639C 1:1:2:2 1:1:1:1 Insertion Loss (Typ.) Common Mode Rejection Ratio (Typ.) VDC 100kHz-12MHz, 1.0Vrms dB 1MHz, 0.5Vrms dB 4MHz, 5Vp-p ns 4MHz, 5Vp-p ns 700 0.2 67 5.0 2.5 Isolation Voltage Rise Time Propogation (Typ.) Delay (Typ.) ABSOLUTE MAXIMUM RATINGS Operating free air temperature range 0°C to 70°C Storage temperature range -60°C to 125°C SOLDERING INFORMATION 1 FEATURES RoHS compliant IEEE 802.5 compatible Industry-standard footprint DESCRIPTION Peak wave solder temperature, 1.5mm from case 300˚C Pin finish Tin 1 For further information, please visit www.murata-ps.com/rohs All specifications typical at TA=25°C. PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS These devices are designed to provide transformer coupling between the Ring Interface Circuit and the Medium Interface Cable in IEEE 802.5 Token Ring interface applications. The devices are capable of working at data rates of 1 to 16Mbps and can transmit the non-data J and K symbols. The turns ratios are precisely controlled to enable accurate centre taps to be formed when required. Ratios of 1:1:1:1 and 1:1:2:2 are available in a 8 pin DIL package style. All devices offer isolation of 700VDC and are supplied in packages using UL 94V-0 rated materials. PIN CONNECTIONS 8 PIN DIL 12.9 (0.508) 6.86 (0.27) 8 1638C XYYWW 1 5.8 (0.228) 4.50 (0.177) Min. 7 6 5 N N 1 1 2 3 4 0.64 (0.025) 2.54 (0.10) 7.62 (0.3) For full details go to www.murata-ps.com/rohs Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 0.25±0.05 (0.01±0.002) Unless otherwise stated all dimensions in mm (inches) ±0.25 (0.01). Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2014 Murata Power Solutions, Inc. www.murata-ps.com KMP_1638C_1639C_C01 Page 1 of 1