DATA SHEET SMP1321 Series: Low Capacitance, Plastic Packaged PIN Diodes Applications High-performance wireless switches Features Capacitance: 0.18 pF typical 30 V Series resistance: 1.05 typical 10 mA Packages rated MSL1, 260 C per JEDEC J-STD-020 Description The SMP1321 series of plastic packaged, surface mountable PIN diodes is designed for use in high volume switch applications from 10 MHz to more than 10 GHz. The low capacitance of these diodes (0.25 pF), combined with a low resistance (2.0 maximum at 10 mA), makes the SMP1321 series particularly suited to high isolation, series-connected PIN diode switches in battery operated circuits. The SMP1321 series is available in a selection of plastic packages and a variety of configurations that include an SC-70, a small footprint SC-79, a low inductance SOT-23, and a miniature SOD-882. Table 1 describes the various packages and marking of the SMP1321 series. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 200048N Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 21, 2012 1 DATA SHEET SMP1321 SERIES DIODES Table 1. SMP1321 Series Packaging and Marking Single Common Anode Common Cathode Series Pair Low Inductance Single Single Single SOT-23 SOT-23 SOT-23 SOT-23 SOT-23 SOD-323 SC-79 SOD-882 Green Green Green SMP1321-001 SMP1321-003 SMP1321-004 SMP1321-005 SMP1321-007 Marking: PM1 Marking: PM9 Marking: PM3 Marking: PM2 Marking: PMB SMP1321-001LF SMP1321-003LF SMP1321-004LF SMP1321-005LF SMP1321-007LF SMP1321-011LF SMP1321-079LF SMP1321-040LF Green Green Green Green Green Marking: RM Marking: Cathode Marking: C Marking: RM1 Marking: RM9 Marking: RM3 Marking: RM2 Marking: RMB LS = 1.5 nH LS = 1.5 nH LS = 1.5 nH LS = 1.5 nH LS = 0.4 nH LS = 1.5 nH LS = 0.7 nH LS = 0.45 nH SC-70 SC-70 SC-70 SMP1321-073 SMP1321-074 SMP1321-075 Marking: PM9 Marking: PM3 Marking: PM2 SMP1321-073LF SMP1321-074LF SMP1321-075LF Green Green Green Marking: RM9 Marking: RM3 Marking: RM2 LS = 1.4 nH LS = 1.4 nH LS = 1.4 nH The Pb-free symbol or LF in the part number denotes a lead-free, RoHS-compliant package unless otherwise noted as Green. Tin/lead (Sn/Pb) packaging is not recommended for new designs. Innovation to Go Select Linear Products (indicated by ) now available for purchase online. SMP1321 series are provided in Table 2. Electrical specifications SMP1321-007 are provided in Table 3. Resistance versus temperature For the -007 configuration of the SOT-23 package, the package measurements are provided in Table 4. inductance is effectively reduced to 0.4 nH compared to the 1.5 nH value of the standard configuration. This lower inductance Typical performance characteristics of the SMP1321 series are is particularly beneficial when the diodes are used as shunt illustrated in Figures 2 to 5. Package dimensions are shown in connected switches at frequencies higher than 500 MHz in which Figures 6 to 14 (even numbers), and tape and reel dimensions are inductance is the primary limitation on maximum switch isolation. provided in Figures 7 to 15 (odd numbers). To achieve the effective 0.4 nH, the SOT-23 package must be inserted in the microstrip circuit board with a gap in the trace, as Package and Handling Information shown in Figure 1. Because of the polarity of the diode junction, Instructions on the shipping container label regarding exposure to this low inductance feature is realizable only with the cathode moisture after the container seal is broken must be followed. connected to ground. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SMP1321 series is rated to Moisture Sensitivity Level 1 (MSL1) at 260 C. It can be used for lead or lead-free soldering. For additional information, refer to the Skyworks Application Note, Solder Reflow Information, document number 200164. Care must be taken when attaching this product, whether it is Figure 1. SOT-23 Package Trace Gap done manually or in a production solder reflow environment. Production quantities of this product are shipped in a standard tape and reel format. Electrical and Mechanical Specifications The part number and configuration for the SMP1321 series are provided in Table 1. The absolute maximum ratings of the Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 September 21, 2012 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 200048N