IC库存索引地图

电子元器件 [4123]

• EXC-14CE900U
  分类：EXC-14CE900U
  品牌：Panasonic Electronic Components
  封装：剪切带 (CT)
  描述：NOISE FILTER COM MODE 90 OHM SMD
• EXC-14CE900U
  分类：EXC-14CE900U
  品牌：Panasonic Electronic Components
  封装：带卷 (TR)
  描述：NOISE FILTER COM MODE 90 OHM SMD
• EXC-24CN601X
  分类：EXC-24CN601X
  品牌：Panasonic Electronic Components
  封装：Digi-Reel?
  描述：NOISE FILTER 2 MODE 600 OHM SMD
• EXC-24CN601X
  分类：EXC-24CN601X
  品牌：Panasonic Electronic Components
  封装：剪切带 (CT)
  描述：NOISE FILTER 2 MODE 600 OHM SMD
• EXC-24CN601X
  分类：EXC-24CN601X
  品牌：Panasonic Electronic Components
  封装：带卷 (TR)
  描述：NOISE FILTER 2 MODE 600 OHM SMD
• SF25-1960M5UB01
  分类：SF25-1960M5UB01
  品牌：AVX Corp/Kyocera Corp
  封装：带卷 (TR)
  描述：FILTER SAW 1960.00 MHZ SMD
• SF25-0881M5UB02
  分类：SF25-0881M5UB02
  品牌：AVX Corp/Kyocera Corp
  封装：带卷 (TR)
  描述：FILTER SAW 881.00 MHZ
• AFS14A04-1575.42-T2
  分类：AFS14A04-1575.42-T2
  品牌：Abracon Corporation
  封装：Digi-Reel?
  描述：FILTER SAW 1575.42 MHZ SMD
• AFS14A04-1575.42-T2
  分类：AFS14A04-1575.42-T2
  品牌：Abracon Corporation
  封装：剪切带 (CT)
  描述：FILTER SAW 1575.42 MHZ SMD
• AFS14A04-1575.42-T2
  分类：AFS14A04-1575.42-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 1575.42 MHZ SMD
• AFS14A30-2185.00-T2
  分类：AFS14A30-2185.00-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 2185.00 MHZ SMD
• AFS14A15-2017.50-T2
  分类：AFS14A15-2017.50-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 2017.50 MHZ SMD
• AFS14A35-1591.50-T2
  分类：AFS14A35-1591.50-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 1591.50 MHZ SMD
• AFS14A34-1588.66-T2
  分类：AFS14A34-1588.66-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 1588.66 MHZ SMD
• AFS20A05-1672.50-T2
  分类：AFS20A05-1672.50-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 1672.50 MHZ SMD
• AFS14A35-1902.00-T2
  分类：AFS14A35-1902.00-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 1902.00 MHZ SMD
• AFS20A15-2017.50-T2
  分类：AFS20A15-2017.50-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 2017.50 MHZ SMD
• AFS20A20-1227.60-T2
  分类：AFS20A20-1227.60-T2
  品牌：Abracon Corporation
  封装：带卷 (TR)
  描述：FILTER SAW 1227.60 MHZ SMD
• SF2098G
  分类：SF2098G
  品牌：RFM
  封装：Digi-Reel?
  描述：FILTER SAW RF 915 MHZ SM2520-4
• SF2098G
  分类：SF2098G
  品牌：RFM
  封装：剪切带 (CT)
  描述：FILTER SAW RF 915 MHZ SM2520-4
• SF2098G
  分类：SF2098G
  品牌：RFM
  封装：带卷 (TR)
  描述：FILTER SAW RF 915 MHZ SM2520-4
• RF1172
  分类：RF1172
  品牌：RFM
  封装：带卷 (TR)
  描述：FILTER SAW RF 433.92MHZ TO39-3
• SAFEA2G56FA0F00R14
  分类：SAFEA2G56FA0F00R14
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 2.56GHZ WIMAX SMD
• SAFEA2G56FA0F00R14
  分类：SAFEA2G56FA0F00R14
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 2.56GHZ WIMAX SMD
• SAFEA2G34FB0F00R14
  分类：SAFEA2G34FB0F00R14
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 2.34GHZ WIBRO SMD
• SAFEA2G34FB0F00R14
  分类：SAFEA2G34FB0F00R14
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 2.34GHZ WIBRO SMD
• SAFEA2G44AA0F00R14
  分类：SAFEA2G44AA0F00R14
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 2.44GHZ BLUETOOTH SMD
• SAFEA2G44AA0F00R14
  分类：SAFEA2G44AA0F00R14
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 2.44GHZ BLUETOOTH SMD
• SAFEA2G45FA0F00R14
  分类：SAFEA2G45FA0F00R14
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 2.45GHZ WLAN/BT SMD
• SAFEA2G45FA0F00R14
  分类：SAFEA2G45FA0F00R14
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 2.45GHZ WLAN/BT SMD
• SAFEA2G45AB0F00R14
  分类：SAFEA2G45AB0F00R14
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 2.45GHZ WLAN/BT SMD
• SAFEA2G45AB0F00R14
  分类：SAFEA2G45AB0F00R14
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 2.45GHZ WLAN/BT SMD
• SAFEA2G45AC0F00R14
  分类：SAFEA2G45AC0F00R14
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 2.45GHZ WLAN/BT SMD
• SAFEA2G45AC0F00R14
  分类：SAFEA2G45AC0F00R14
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 2.45GHZ WLAN/BT SMD
• SAFEB915MAL0F00R12
  分类：SAFEB915MAL0F00R12
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW ISM 915MHZ SMD
• SAFEB915MAL0F00R12
  分类：SAFEB915MAL0F00R12
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW ISM 915MHZ SMD
• SAFSE1G57KA0T90R12
  分类：SAFSE1G57KA0T90R12
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 1.57GHZ GPS SMD
• SAFSE1G57KA0T90R12
  分类：SAFSE1G57KA0T90R12
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57GHZ GPS SMD
• SAFSE1G57KA0T90R12
  分类：SAFSE1G57KA0T90R12
  品牌：Murata Electronics North America
  封装：带卷 (TR)
  描述：FILTER SAW 1.57GHZ GPS SMD
• SAFEB1G57KB0F00R12
  分类：SAFEB1G57KB0F00R12
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 1.57GHZ GPS SMD
• SAFEB1G57KB0F00R12
  分类：SAFEB1G57KB0F00R12
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57GHZ GPS SMD
• SAFEB1G57KE0F00R12
  分类：SAFEB1G57KE0F00R12
  品牌：Murata Electronics North America
  封装：Digi-Reel?
  描述：FILTER SAW 1.57GHZ GPS SMD
• SAFEB1G57KE0F00R12
  分类：SAFEB1G57KE0F00R12
  品牌：Murata Electronics North America
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57GHZ GPS SMD
• D5NE782M0P1D6-Z
  分类：D5NE782M0P1D6-Z
  品牌：Taiyo Yuden
  封装：Digi-Reel?
  描述：DUPLEXER SAW 782MHZ LTE XIII
• D5NE782M0P1D6-Z
  分类：D5NE782M0P1D6-Z
  品牌：Taiyo Yuden
  封装：剪切带 (CT)
  描述：DUPLEXER SAW 782MHZ LTE XIII
• D5NE782M0P1D6-Z
  分类：D5NE782M0P1D6-Z
  品牌：Taiyo Yuden
  封装：带卷 (TR)
  描述：DUPLEXER SAW 782MHZ LTE XIII
• B39730B5001H510
  分类：B39730B5001H510
  品牌：EPCOS Inc
  封装：
  描述：B5001 IF 73.35MHZ
• B39710B5044H510
  分类：B39710B5044H510
  品牌：EPCOS Inc
  封装：
  描述：IF 71.00MHZ
• B39511B3888Z710
  分类：B39511B3888Z710
  品牌：EPCOS Inc
  封装：
  描述：IF 505.00 MHZ
• B39511B3833Z710
  分类：B39511B3833Z710
  品牌：EPCOS Inc
  封装：
  描述：IF 505.00MHZ
• B39501B3688H310
  分类：B39501B3688H310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 499.25MHZ SMD
• B39471B5040H810
  分类：B39471B5040H810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 468.0MHZ SMD
• B39461B5034H810
  分类：B39461B5034H810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 456.0MHZ WIMAX SMD
• B39461B5011H810
  分类：B39461B5011H810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 456.0MHZ WIMAX SMD
• B39451B5028H810
  分类：B39451B5028H810
  品牌：EPCOS Inc
  封装：
  描述：IF 450.50MHZ
• B39421B3675U310
  分类：B39421B3675U310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 415.0 MHZ SMD
• B39381B3825H310
  分类：B39381B3825H310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 380.00MHZ SMD
• B39251B5089H310
  分类：B39251B5089H310
  品牌：EPCOS Inc
  封装：
  描述：IF 252.0MHZ QCC12C
• B39251B3893H310
  分类：B39251B3893H310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 248.6MHZ SMD
• B39251B3892H510
  分类：B39251B3892H510
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 248.6MHZ SMD
• B39211B5071H810
  分类：B39211B5071H810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 211.0MHZ SMD
• B39211B5035Z710
  分类：B39211B5035Z710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 208.0MHZ SMD
• B39201B5045H510
  分类：B39201B5045H510
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 201.0MHZ SMD
• B39181B5201H510
  分类：B39181B5201H510
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 183.6MHZ SMD
• B39171B5060H810
  分类：B39171B5060H810
  品牌：EPCOS Inc
  封装：
  描述：IF 167.00MHZ
• B39171B3883Z710
  分类：B39171B3883Z710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 168.96MHZ SMD
• B39171B3882Z710
  分类：B39171B3882Z710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 168.96MHZ SMD
• B39171B3881Z710
  分类：B39171B3881Z710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 168.96MHZ SMD
• B39171B3876U310
  分类：B39171B3876U310
  品牌：EPCOS Inc
  封装：
  描述：IF FTR 174.20 MHZ
• B39171B3841U210
  分类：B39171B3841U210
  品牌：EPCOS Inc
  封装：
  描述：IF 174.20MHZ
• B39161B5051Z710
  分类：B39161B5051Z710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 161.28MHZ SMD
• B39122B1605U810
  分类：B39122B1605U810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW RF 1220MHZ SMD
• B39122B1603Z810
  分类：B39122B1603Z810
  品牌：EPCOS Inc
  封装：
  描述：LOW LOSS 1220 MHZ
• B39121B5014Z710
  分类：B39121B5014Z710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 119.60MHZ SMD
• B39121B3886H310
  分类：B39121B3886H310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW IF 121.00MHZ SMD
• B39112B1612U810
  分类：B39112B1612U810
  品牌：EPCOS Inc
  封装：
  描述：RF 1086MHZ
• B39941B3514H910
  分类：B39941B3514H910
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 881.5/942.5MHZ SMD
• B39431B3740H110
  分类：B39431B3740H110
  品牌：EPCOS Inc
  封装：
  描述：B3730 FRONTEND FILTER
• B39202B4234H910
  分类：B39202B4234H910
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 881.5/1960MHZ SMD
• B39192B4222U810
  分类：B39192B4222U810
  品牌：EPCOS Inc
  封装：
  描述：B4222 AE LOW LOSS 1880.0
• B39182B4235H910
  分类：B39182B4235H910
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 942.5/1842.5MHZ SMD
• B39361X6966M100
  分类：B39361X6966M100
  品牌：EPCOS Inc
  封装：管件
  描述：FILTER SAW BANDPASS 36.125MHZ
• B39242B9410K610
  分类：B39242B9410K610
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B9410K610
  分类：B39242B9410K610
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B9410K610
  分类：B39242B9410K610
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B7841C710
  分类：B39242B7841C710
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B7841C710
  分类：B39242B7841C710
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B7841C710
  分类：B39242B7841C710
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B7766C911
  分类：B39242B7766C911
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B7766C911
  分类：B39242B7766C911
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 2.44175GHZ SMD
• B39242B7766C911
  分类：B39242B7766C911
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 2.44175GHZ SMD
• B39252B9429K610
  分类：B39252B9429K610
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 2.450GHZ SMD
• B39252B9429K610
  分类：B39252B9429K610
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 2.450GHZ SMD
• B39252B9429K610
  分类：B39252B9429K610
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 2.450GHZ SMD
• B39162B7840C710
  分类：B39162B7840C710
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B7840C710
  分类：B39162B7840C710
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B7839K410
  分类：B39162B7839K410
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B7839K410
  分类：B39162B7839K410
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B7839K410
  分类：B39162B7839K410
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B9037E910
  分类：B39162B9037E910
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B9037E910
  分类：B39162B9037E910
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57542GHZ SMD
• B39861B3589Z810
  分类：B39861B3589Z810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 864MHZ REMOTE SMD
• B39861B3589Z810
  分类：B39861B3589Z810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 864MHZ REMOTE SMD
• B39171B3584Z810
  分类：B39171B3584Z810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 173.075MHZ SMD
• B39171B3584Z810
  分类：B39171B3584Z810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 173.075MHZ SMD
• B39192B3511U810
  分类：B39192B3511U810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 1.865/1.895GHZ SMD
• B39192B3511U810
  分类：B39192B3511U810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 1.865/1.895GHZ SMD
• B39181B3501H810
  分类：B39181B3501H810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 183.6MHZ SMD
• B39181B3501H810
  分类：B39181B3501H810
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 183.6MHZ SMD
• B39162B4059U810
  分类：B39162B4059U810
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 1.57542GHZ SMD
• B39162B4059U810
  分类：B39162B4059U810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 1.57542GHZ SMD
• B39431B3750U310
  分类：B39431B3750U310
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 433.92MHZ REMOTE SMD
• B39431B3750U310
  分类：B39431B3750U310
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 433.92MHZ REMOTE SMD
• B39431B3750U310
  分类：B39431B3750U310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 433.92MHZ REMOTE SMD
• B39301B3553U310
  分类：B39301B3553U310
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 303.8MHZ REMOTE SMD
• B39301B3553U310
  分类：B39301B3553U310
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 303.8MHZ REMOTE SMD
• B39252B4041U410
  分类：B39252B4041U410
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 2.4485 GHZ MOBILE SMD
• B39451B3558U310
  分类：B39451B3558U310
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 449.14MHZ REMOTE SMD
• B39451B3558U310
  分类：B39451B3558U310
  品牌：EPCOS Inc
  封装：带卷 (TR)
  描述：FILTER SAW 449.14MHZ REMOTE SMD
• B39321B3765Z810
  分类：B39321B3765Z810
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 315.50MHZ REMOTE SMD
• B39321B3765Z810
  分类：B39321B3765Z810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 315.50MHZ REMOTE SMD
• B39321B3763Z810
  分类：B39321B3763Z810
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 315.15MHZ REMOTE SMD
• B39321B3763Z810
  分类：B39321B3763Z810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 315.15MHZ REMOTE SMD
• B39311B3766Z810
  分类：B39311B3766Z810
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 312.2MHZ REMOTE SMD
• B39311B3766Z810
  分类：B39311B3766Z810
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 312.2MHZ REMOTE SMD
• B39431B3575U310W3
  分类：B39431B3575U310W3
  品牌：EPCOS Inc
  封装：Digi-Reel?
  描述：FILTER SAW 433.92MHZ REMOTE SMD
• B39431B3575U310W3
  分类：B39431B3575U310W3
  品牌：EPCOS Inc
  封装：剪切带 (CT)
  描述：FILTER SAW 433.92MHZ REMOTE SMD
• B39458M3953M100S1
  分类：B39458M3953M100S1
  品牌：EPCOS Inc
  封装：散装
  描述：FILTER SAW IF 45.75MHZ 5-SIP
• B39440X6855M100
  分类：B39440X6855M100
  品牌：EPCOS Inc
  封装：散装
  描述：FILTER SAW BANDPASS 44MHZ
• B39458M4952M100S1
  分类：B39458M4952M100S1
  品牌：EPCOS Inc
  封装：散装
  描述：FILTER SAW IF 45.75MHZ 5-SIP