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Maxim - Dallas Supplier
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DALLAS Catalog |
Home |
Independent Distributor of Dallas Hard-To-Find Components
Contact maximsupply: Phone:970-547-4487 Fax:954-827-0139
RoHs Part Cross Reference is Available for many devices with this prefixes.
Check the part you would like a price and delivery quote for | ||||||
| DS2223Z000 | ||||||
| DS2223Z256BIT | ||||||
| DS2223Z256BITSRAMSO | ||||||
| DS2223ZTRTAPEREEL | ||||||
| DS2224 | ||||||
| DS22242KREEL | ||||||
| DS22247 | ||||||
| DS2224AZ | ||||||
| DS2224B | ||||||
| DS2224E | ||||||
| DS2224T092 | ||||||
| DS2224T092TR | ||||||
| DS2224TR | ||||||
| DS2224Y | ||||||
| DS2224YSMD | ||||||
| DS2224ZTR | ||||||
| DS2224Z100 | ||||||
| DS2224ZSMD | ||||||
| DS2224ZT | ||||||
| DS2225 | ||||||
| DS22250T8 | ||||||
| DS2227 | ||||||
| DS2227100 | ||||||
| DS2227120 | ||||||
| DS22284MG | ||||||
| DS2229 | ||||||
| DS222914M5 | ||||||
| DS222985 | ||||||
| DS2229I4M5 | ||||||
| DS2229T070HM628128B | ||||||
| DS2229T4M7CY62148LL | ||||||
| DS2229T4M7HM62512BL | ||||||
| DS2229T4M7HM628512A | ||||||
| DS2229T4M7HM628512B | ||||||
| DS2229T4M7K6T4008C1 | ||||||
| DS2229T4M7KM684000A | ||||||
| DS2229T4M7KM684000B | ||||||
| DS222G | ||||||
| DS22306980068 | ||||||
| DS2234 | ||||||
| DS22357AE | ||||||
| DS22370101 | ||||||
| DS223R1 | ||||||
| DS223Z | ||||||
| DS2242 | ||||||
| DS2244T12U87 | ||||||
| DS2244T12V | ||||||
| DS2244T24 | ||||||
| DS2245 | ||||||
| DS2245KIT | ||||||
| DS224512N | ||||||
| DS224524 | ||||||
| DS2245M24 | ||||||
| DS2249 | ||||||
| DS2249DAA | ||||||
| DS2249EU | ||||||
| DS2249M | ||||||
| DS2249PH | ||||||
| DS224A | ||||||
| DS224D | ||||||
| DS224Y | ||||||
| DS2250 | ||||||
| DS22506416 | ||||||
| DS22500808 | ||||||
| DS22500812 | ||||||
| DS22500T6412 | ||||||
| DS22503208 | ||||||
| DS2250321 | ||||||
| DS22503212 | ||||||
| DS22503216 | ||||||
| DS2250328 | ||||||
| DS2250641 | ||||||
| DS22506412 | ||||||
| DS22506416SI | ||||||
| DS22506416SI2250 | ||||||
| DS22506446 | ||||||
| DS225064616 | ||||||
| DS2250816 | ||||||
| DS225088 | ||||||
| DS2250D2 | ||||||
| DS2250MODULE | ||||||
| DS2250MODULE2250MOD | ||||||
| DS2250T | ||||||
| DS2250T0812 | ||||||
| DS2250T3212 | ||||||
| DS2250T3216 | ||||||
| DS2250T328 | ||||||
| DS2250T6412MO | ||||||
| DS2250T6412MOD | ||||||
| DS2250T6416 | ||||||
| DS2250T648 | ||||||
| DS2250T812 | ||||||
| DS2250T816 | ||||||
| DS2250T88 | ||||||
| DS225132 | ||||||
| DS2251321 | ||||||
| DS22513212 | ||||||
| DS22516416 | ||||||
| DS2251T | ||||||
| DS2251T112 |
| ROHS DS2223Z000 DS2223Z000 DS2223Z000 | DS-2223Z000 | DS 2223Z000 | DS2-223Z000 | DS2 223Z000 | DS2223Z0 | 2223Z000 |
| ROHS DS2223Z256BIT DS2223Z256BIT DS2223Z256BIT | DS-2223Z256BIT | DS 2223Z256BIT | DS2-223Z256BIT | DS2 223Z256BIT | DS2223Z256B | 2223Z256BIT |
| ROHS DS2223Z256BITSRAMSO DS2223Z256BITSRAMSO DS2223Z256BITSRAMSO | DS-2223Z256BITSRAMSO | DS 2223Z256BITSRAMSO | DS2-223Z256BITSRAMSO | DS2 223Z256BITSRAMSO | DS2223Z256BITSRAM | 2223Z256BITSRAMSO |
| ROHS DS2223ZTRTAPEREEL DS2223ZTRTAPEREEL DS2223ZTRTAPEREEL | DS-2223ZTRTAPEREEL | DS 2223ZTRTAPEREEL | DS2-223ZTRTAPEREEL | DS2 223ZTRTAPEREEL | DS2223ZTRTAPERE | 2223ZTRTAPEREEL |
| ROHS DS2224 DS2224 DS2224 | DS-2224 | DS 2224 | DS2-224 | DS2 224 | DS22 | 2224 |
| ROHS DS22242KREEL DS22242KREEL DS22242KREEL | DS-22242KREEL | DS 22242KREEL | DS2-2242KREEL | DS2 2242KREEL | DS22242KRE | 22242KREEL |
| ROHS DS22247 DS22247 DS22247 | DS-22247 | DS 22247 | DS2-2247 | DS2 2247 | DS222 | 22247 |
| ROHS DS2224AZ DS2224AZ DS2224AZ | DS-2224AZ | DS 2224AZ | DS2-224AZ | DS2 224AZ | DS2224 | 2224AZ |
| ROHS DS2224B DS2224B DS2224B | DS-2224B | DS 2224B | DS2-224B | DS2 224B | DS222 | 2224B |
| ROHS DS2224E DS2224E DS2224E | DS-2224E | DS 2224E | DS2-224E | DS2 224E | DS222 | 2224E |
| ROHS DS2224T092 DS2224T092 DS2224T092 | DS-2224T092 | DS 2224T092 | DS2-224T092 | DS2 224T092 | DS2224T0 | 2224T092 |
| ROHS DS2224T092TR DS2224T092TR DS2224T092TR | DS-2224T092TR | DS 2224T092TR | DS2-224T092TR | DS2 224T092TR | DS2224T092 | 2224T092TR |
| ROHS DS2224TR DS2224TR DS2224TR | DS-2224TR | DS 2224TR | DS2-224TR | DS2 224TR | DS2224 | 2224TR |
| ROHS DS2224Y DS2224Y DS2224Y | DS-2224Y | DS 2224Y | DS2-224Y | DS2 224Y | DS222 | 2224Y |
| ROHS DS2224YSMD DS2224YSMD DS2224YSMD | DS-2224YSMD | DS 2224YSMD | DS2-224YSMD | DS2 224YSMD | DS2224YS | 2224YSMD |
| ROHS DS2224ZTR DS2224ZTR DS2224ZTR | DS-2224ZTR | DS 2224ZTR | DS2-224ZTR | DS2 224ZTR | DS2224Z | 2224ZTR |
| ROHS DS2224Z100 DS2224Z100 DS2224Z100 | DS-2224Z100 | DS 2224Z100 | DS2-224Z100 | DS2 224Z100 | DS2224Z1 | 2224Z100 |
| ROHS DS2224ZSMD DS2224ZSMD DS2224ZSMD | DS-2224ZSMD | DS 2224ZSMD | DS2-224ZSMD | DS2 224ZSMD | DS2224ZS | 2224ZSMD |
| ROHS DS2224ZT DS2224ZT DS2224ZT | DS-2224ZT | DS 2224ZT | DS2-224ZT | DS2 224ZT | DS2224 | 2224ZT |
| ROHS DS2225 DS2225 DS2225 | DS-2225 | DS 2225 | DS2-225 | DS2 225 | DS22 | 2225 |
| ROHS DS22250T8 DS22250T8 DS22250T8 | DS-22250T8 | DS 22250T8 | DS2-2250T8 | DS2 2250T8 | DS22250 | 22250T8 |
| ROHS DS2227 DS2227 DS2227 | DS-2227 | DS 2227 | DS2-227 | DS2 227 | DS22 | 2227 |
| ROHS DS2227100 DS2227100 DS2227100 | DS-2227100 | DS 2227100 | DS2-227100 | DS2 227100 | DS22271 | 2227100 |
| ROHS DS2227120 DS2227120 DS2227120 | DS-2227120 | DS 2227120 | DS2-227120 | DS2 227120 | DS22271 | 2227120 |
| ROHS DS22284MG DS22284MG DS22284MG | DS-22284MG | DS 22284MG | DS2-2284MG | DS2 2284MG | DS22284 | 22284MG |
| ROHS DS2229 DS2229 DS2229 | DS-2229 | DS 2229 | DS2-229 | DS2 229 | DS22 | 2229 |
| ROHS DS222914M5 DS222914M5 DS222914M5 | DS-222914M5 | DS 222914M5 | DS2-22914M5 | DS2 22914M5 | DS222914 | 222914M5 |
| ROHS DS222985 DS222985 DS222985 | DS-222985 | DS 222985 | DS2-22985 | DS2 22985 | DS2229 | 222985 |
| ROHS DS2229I4M5 DS2229I4M5 DS2229I4M5 | DS-2229I4M5 | DS 2229I4M5 | DS2-229I4M5 | DS2 229I4M5 | DS2229I4 | 2229I4M5 |
| ROHS DS2229T070HM628128B DS2229T070HM628128B DS2229T070HM628128B | DS-2229T070HM628128B | DS 2229T070HM628128B | DS2-229T070HM628128B | DS2 229T070HM628128B | DS2229T070HM62812 | 2229T070HM628128B |
| ROHS DS2229T4M7CY62148LL DS2229T4M7CY62148LL DS2229T4M7CY62148LL | DS-2229T4M7CY62148LL | DS 2229T4M7CY62148LL | DS2-229T4M7CY62148LL | DS2 229T4M7CY62148LL | DS2229T4M7CY62148 | 2229T4M7CY62148LL |
| ROHS DS2229T4M7HM62512BL DS2229T4M7HM62512BL DS2229T4M7HM62512BL | DS-2229T4M7HM62512BL | DS 2229T4M7HM62512BL | DS2-229T4M7HM62512BL | DS2 229T4M7HM62512BL | DS2229T4M7HM62512 | 2229T4M7HM62512BL |
| ROHS DS2229T4M7HM628512A DS2229T4M7HM628512A DS2229T4M7HM628512A | DS-2229T4M7HM628512A | DS 2229T4M7HM628512A | DS2-229T4M7HM628512A | DS2 229T4M7HM628512A | DS2229T4M7HM62851 | 2229T4M7HM628512A |
| ROHS DS2229T4M7HM628512B DS2229T4M7HM628512B DS2229T4M7HM628512B | DS-2229T4M7HM628512B | DS 2229T4M7HM628512B | DS2-229T4M7HM628512B | DS2 229T4M7HM628512B | DS2229T4M7HM62851 | 2229T4M7HM628512B |
| ROHS DS2229T4M7K6T4008C1 DS2229T4M7K6T4008C1 DS2229T4M7K6T4008C1 | DS-2229T4M7K6T4008C1 | DS 2229T4M7K6T4008C1 | DS2-229T4M7K6T4008C1 | DS2 229T4M7K6T4008C1 | DS2229T4M7K6T4008 | 2229T4M7K6T4008C1 |
| ROHS DS2229T4M7KM684000A DS2229T4M7KM684000A DS2229T4M7KM684000A | DS-2229T4M7KM684000A | DS 2229T4M7KM684000A | DS2-229T4M7KM684000A | DS2 229T4M7KM684000A | DS2229T4M7KM68400 | 2229T4M7KM684000A |
| ROHS DS2229T4M7KM684000B DS2229T4M7KM684000B DS2229T4M7KM684000B | DS-2229T4M7KM684000B | DS 2229T4M7KM684000B | DS2-229T4M7KM684000B | DS2 229T4M7KM684000B | DS2229T4M7KM68400 | 2229T4M7KM684000B |
| ROHS DS222G DS222G DS222G | DS-222G | DS 222G | DS2-22G | DS2 22G | DS22 | 222G |
| ROHS DS22306980068 DS22306980068 DS22306980068 | DS-22306980068 | DS 22306980068 | DS2-2306980068 | DS2 2306980068 | DS223069800 | 22306980068 |
| ROHS DS2234 DS2234 DS2234 | DS-2234 | DS 2234 | DS2-234 | DS2 234 | DS22 | 2234 |
| ROHS DS22357AE DS22357AE DS22357AE | DS-22357AE | DS 22357AE | DS2-2357AE | DS2 2357AE | DS22357 | 22357AE |
| ROHS DS22370101 DS22370101 DS22370101 | DS-22370101 | DS 22370101 | DS2-2370101 | DS2 2370101 | DS223701 | 22370101 |
| ROHS DS223R1 DS223R1 DS223R1 | DS-223R1 | DS 223R1 | DS2-23R1 | DS2 23R1 | DS223 | 223R1 |
| ROHS DS223Z DS223Z DS223Z | DS-223Z | DS 223Z | DS2-23Z | DS2 23Z | DS22 | 223Z |
| ROHS DS2242 DS2242 DS2242 | DS-2242 | DS 2242 | DS2-242 | DS2 242 | DS22 | 2242 |
| ROHS DS2244T12U87 DS2244T12U87 DS2244T12U87 | DS-2244T12U87 | DS 2244T12U87 | DS2-244T12U87 | DS2 244T12U87 | DS2244T12U | 2244T12U87 |
| ROHS DS2244T12V DS2244T12V DS2244T12V | DS-2244T12V | DS 2244T12V | DS2-244T12V | DS2 244T12V | DS2244T1 | 2244T12V |
| ROHS DS2244T24 DS2244T24 DS2244T24 | DS-2244T24 | DS 2244T24 | DS2-244T24 | DS2 244T24 | DS2244T | 2244T24 |
| ROHS DS2245 DS2245 DS2245 | DS-2245 | DS 2245 | DS2-245 | DS2 245 | DS22 | 2245 |
| ROHS DS2245KIT DS2245KIT DS2245KIT | DS-2245KIT | DS 2245KIT | DS2-245KIT | DS2 245KIT | DS2245K | 2245KIT |
| ROHS DS224512N DS224512N DS224512N | DS-224512N | DS 224512N | DS2-24512N | DS2 24512N | DS22451 | 224512N |
| ROHS DS224524 DS224524 DS224524 | DS-224524 | DS 224524 | DS2-24524 | DS2 24524 | DS2245 | 224524 |
| ROHS DS2245M24 DS2245M24 DS2245M24 | DS-2245M24 | DS 2245M24 | DS2-245M24 | DS2 245M24 | DS2245M | 2245M24 |
| ROHS DS2249 DS2249 DS2249 | DS-2249 | DS 2249 | DS2-249 | DS2 249 | DS22 | 2249 |
| ROHS DS2249DAA DS2249DAA DS2249DAA | DS-2249DAA | DS 2249DAA | DS2-249DAA | DS2 249DAA | DS2249D | 2249DAA |
| ROHS DS2249EU DS2249EU DS2249EU | DS-2249EU | DS 2249EU | DS2-249EU | DS2 249EU | DS2249 | 2249EU |
| ROHS DS2249M DS2249M DS2249M | DS-2249M | DS 2249M | DS2-249M | DS2 249M | DS224 | 2249M |
| ROHS DS2249PH DS2249PH DS2249PH | DS-2249PH | DS 2249PH | DS2-249PH | DS2 249PH | DS2249 | 2249PH |
| ROHS DS224A DS224A DS224A | DS-224A | DS 224A | DS2-24A | DS2 24A | DS22 | 224A |
| ROHS DS224D DS224D DS224D | DS-224D | DS 224D | DS2-24D | DS2 24D | DS22 | 224D |
| ROHS DS224Y DS224Y DS224Y | DS-224Y | DS 224Y | DS2-24Y | DS2 24Y | DS22 | 224Y |
| ROHS DS2250 DS2250 DS2250 | DS-2250 | DS 2250 | DS2-250 | DS2 250 | DS22 | 2250 |
| ROHS DS22506416 DS22506416 DS22506416 | DS-22506416 | DS 22506416 | DS2-2506416 | DS2 2506416 | DS225064 | 22506416 |
| ROHS DS22500808 DS22500808 DS22500808 | DS-22500808 | DS 22500808 | DS2-2500808 | DS2 2500808 | DS225008 | 22500808 |
| ROHS DS22500812 DS22500812 DS22500812 | DS-22500812 | DS 22500812 | DS2-2500812 | DS2 2500812 | DS225008 | 22500812 |
| ROHS DS22500T6412 DS22500T6412 DS22500T6412 | DS-22500T6412 | DS 22500T6412 | DS2-2500T6412 | DS2 2500T6412 | DS22500T64 | 22500T6412 |
| ROHS DS22503208 DS22503208 DS22503208 | DS-22503208 | DS 22503208 | DS2-2503208 | DS2 2503208 | DS225032 | 22503208 |
| ROHS DS2250321 DS2250321 DS2250321 | DS-2250321 | DS 2250321 | DS2-250321 | DS2 250321 | DS22503 | 2250321 |
| ROHS DS22503212 DS22503212 DS22503212 | DS-22503212 | DS 22503212 | DS2-2503212 | DS2 2503212 | DS225032 | 22503212 |
| ROHS DS22503216 DS22503216 DS22503216 | DS-22503216 | DS 22503216 | DS2-2503216 | DS2 2503216 | DS225032 | 22503216 |
| ROHS DS2250328 DS2250328 DS2250328 | DS-2250328 | DS 2250328 | DS2-250328 | DS2 250328 | DS22503 | 2250328 |
| ROHS DS2250641 DS2250641 DS2250641 | DS-2250641 | DS 2250641 | DS2-250641 | DS2 250641 | DS22506 | 2250641 |
| ROHS DS22506412 DS22506412 DS22506412 | DS-22506412 | DS 22506412 | DS2-2506412 | DS2 2506412 | DS225064 | 22506412 |
| ROHS DS22506416SI DS22506416SI DS22506416SI | DS-22506416SI | DS 22506416SI | DS2-2506416SI | DS2 2506416SI | DS22506416 | 22506416SI |
| ROHS DS22506416SI2250 DS22506416SI2250 DS22506416SI2250 | DS-22506416SI2250 | DS 22506416SI2250 | DS2-2506416SI2250 | DS2 2506416SI2250 | DS22506416SI22 | 22506416SI2250 |
| ROHS DS22506446 DS22506446 DS22506446 | DS-22506446 | DS 22506446 | DS2-2506446 | DS2 2506446 | DS225064 | 22506446 |
| ROHS DS225064616 DS225064616 DS225064616 | DS-225064616 | DS 225064616 | DS2-25064616 | DS2 25064616 | DS2250646 | 225064616 |
| ROHS DS2250816 DS2250816 DS2250816 | DS-2250816 | DS 2250816 | DS2-250816 | DS2 250816 | DS22508 | 2250816 |
| ROHS DS225088 DS225088 DS225088 | DS-225088 | DS 225088 | DS2-25088 | DS2 25088 | DS2250 | 225088 |
| ROHS DS2250D2 DS2250D2 DS2250D2 | DS-2250D2 | DS 2250D2 | DS2-250D2 | DS2 250D2 | DS2250 | 2250D2 |
| ROHS DS2250MODULE DS2250MODULE DS2250MODULE | DS-2250MODULE | DS 2250MODULE | DS2-250MODULE | DS2 250MODULE | DS2250MODU | 2250MODULE |
| ROHS DS2250MODULE2250MOD DS2250MODULE2250MOD DS2250MODULE2250MOD | DS-2250MODULE2250MOD | DS 2250MODULE2250MOD | DS2-250MODULE2250MOD | DS2 250MODULE2250MOD | DS2250MODULE2250M | 2250MODULE2250MOD |
| ROHS DS2250T DS2250T DS2250T | DS-2250T | DS 2250T | DS2-250T | DS2 250T | DS225 | 2250T |
| ROHS DS2250T0812 DS2250T0812 DS2250T0812 | DS-2250T0812 | DS 2250T0812 | DS2-250T0812 | DS2 250T0812 | DS2250T08 | 2250T0812 |
| ROHS DS2250T3212 DS2250T3212 DS2250T3212 | DS-2250T3212 | DS 2250T3212 | DS2-250T3212 | DS2 250T3212 | DS2250T32 | 2250T3212 |
| ROHS DS2250T3216 DS2250T3216 DS2250T3216 | DS-2250T3216 | DS 2250T3216 | DS2-250T3216 | DS2 250T3216 | DS2250T32 | 2250T3216 |
| ROHS DS2250T328 DS2250T328 DS2250T328 | DS-2250T328 | DS 2250T328 | DS2-250T328 | DS2 250T328 | DS2250T3 | 2250T328 |
| ROHS DS2250T6412MO DS2250T6412MO DS2250T6412MO | DS-2250T6412MO | DS 2250T6412MO | DS2-250T6412MO | DS2 250T6412MO | DS2250T6412 | 2250T6412MO |
| ROHS DS2250T6412MOD DS2250T6412MOD DS2250T6412MOD | DS-2250T6412MOD | DS 2250T6412MOD | DS2-250T6412MOD | DS2 250T6412MOD | DS2250T6412M | 2250T6412MOD |
| ROHS DS2250T6416 DS2250T6416 DS2250T6416 | DS-2250T6416 | DS 2250T6416 | DS2-250T6416 | DS2 250T6416 | DS2250T64 | 2250T6416 |
| ROHS DS2250T648 DS2250T648 DS2250T648 | DS-2250T648 | DS 2250T648 | DS2-250T648 | DS2 250T648 | DS2250T6 | 2250T648 |
| ROHS DS2250T812 DS2250T812 DS2250T812 | DS-2250T812 | DS 2250T812 | DS2-250T812 | DS2 250T812 | DS2250T8 | 2250T812 |
| ROHS DS2250T816 DS2250T816 DS2250T816 | DS-2250T816 | DS 2250T816 | DS2-250T816 | DS2 250T816 | DS2250T8 | 2250T816 |
| ROHS DS2250T88 DS2250T88 DS2250T88 | DS-2250T88 | DS 2250T88 | DS2-250T88 | DS2 250T88 | DS2250T | 2250T88 |
| ROHS DS225132 DS225132 DS225132 | DS-225132 | DS 225132 | DS2-25132 | DS2 25132 | DS2251 | 225132 |
| ROHS DS2251321 DS2251321 DS2251321 | DS-2251321 | DS 2251321 | DS2-251321 | DS2 251321 | DS22513 | 2251321 |
| ROHS DS22513212 DS22513212 DS22513212 | DS-22513212 | DS 22513212 | DS2-2513212 | DS2 2513212 | DS225132 | 22513212 |
| ROHS DS22516416 DS22516416 DS22516416 | DS-22516416 | DS 22516416 | DS2-2516416 | DS2 2516416 | DS225164 | 22516416 |
| ROHS DS2251T DS2251T DS2251T | DS-2251T | DS 2251T | DS2-251T | DS2 251T | DS225 | 2251T |
| ROHS DS2251T112 DS2251T112 DS2251T112 | DS-2251T112 | DS 2251T112 | DS2-251T112 | DS2 251T112 | DS2251T1 | 2251T112 |
Dallas Semiconductor (Maxim) designs, manufactures and markets a broad
line of mixed-signal, specialty semiconductors. The Company (Dallas Semiconductor / Maxim)
combines proprietary fab and circuit technologies to create
innovative products that are sold to over 15,000 customers
worldwide. Markets served include broadband telecommunications,
wireless handsets, cellular base stations, secure Internet
communications, networking, servers, data storage and a wide
variety of industrial equipment.
Founded in 1984, the Company uses customer problems as an
entry point to develop products with widespread applications.
The Company organizes its products into product groups sharing
common technologies, markets or applications focused on three
major strategic initiatives: Communications, 1-Wire & Network
Computing, and Mixed Signal.
PRODUCT FAMILY
1-WireŽ and iButtonŽ
Amplifiers and Comparators
Analog Switches and Multiplexers
Audio and Video
Automotive
Clocks, Counters, Delay Lines, Oscillators, RTCs
Data Converters, Sample-and-Holds
Digital Potentiometers
Display Drivers and Display Power
Fiber and Communications
Filters (Analog)
High-Frequency ASICs
Hot-Swap and Power Switching
Interface and Interconnect
Memories, Volatile and NV
Microcontrollers
Microprocessor Supervisors & NV RAM Controllers
Power Supplies and Battery Management
Powerline Networking
Protection and Isolation
T/E Carrier and Packetized Products
Thermal Management, Sensors, Sensor Conditioners
TINIŽ (Tiny Internet Interfaces)
Voltage References
Wireless, RF, and Cable
Contact icelect to buy Dallas Semiconductor components