Voir tout

Veuillez vous référer à la version anglaise comme étant notre version officielleRetourner

L'Europe 
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Netherlands(Nederland) Spain(español) Turkey(Türk dili) Israel(עִבְרִית) Denmark(Dansk) Switzerland(Deutsch) United Kingdom(English)
Asie-Pacifique
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Philippines(Pilipino)
Afrique, Inde et Moyen-Orient
India(हिंदी)
Amérique du Nord
United States(English) Canada(English) Mexico(español)
AccueilCentre des produitsCircuits intégrés (ci)Acquisition de données - potentiomètres numériques

Acquisition de données - potentiomètres numériques

Produits 1,602 trouvés

Liste des produits

12345678...33
Comparer Image Partie # Fabricant La description Stocks Modèle ECAD RoHS Tension - Alimentation Emballer Numéro de produit de base Résistance - Essuie glace (Ohms) (Typ) Coefficient de température (Typ) Nombre de robinets Taper Résistance (Ohms) Type de mémoire Séries Nombre de circuits Package composant fournisseur Package / Boîte Tolérance Configuration Interface Caractéristiques Type de montage Température de fonctionnement Quantité
CAT5112VI-10-GT3 CAT5112VI-10-GT3 onsemi IC DGTL POT 10KOHM 32TAP 8SOIC En stock20039 pcs 2.5V ~ 6V Tape & Reel (TR) CAT5112 - 300ppm/°C 32 Linear 10k Non-Volatile - 1 8-SOIC 8-SOIC (0.154", 3.90mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount -40°C ~ 85°C
DS3501U+ DS3501U+ Analog Devices Inc./Maxim Integrated IC DGTL POT 10KOHM 128TAP 10UMAX En stock37740 pcs 2.7V ~ 5.5V, 4.5V ~ 15.5V Tube DS3501 5000 (Max) ±4ppm/°C 128 Linear 10k Non-Volatile - 1 10-uMAX/uSOP 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) ±20% Potentiometer I²C Selectable Address, Zero-Cross Sense Surface Mount -40°C ~ 100°C
MCP41100-I/SN MCP41100-I/SN Microchip Technology IC DGTL POT 100KOHM 256TAP 8SOIC En stock21171 pcs 2.7V ~ 5.5V Tube MCP41100 175 800ppm/°C 256 Linear 100k Volatile - 1 8-SOIC 8-SOIC (0.154', 3.90mm Width) ±30% Potentiometer SPI - Surface Mount -40°C ~ 85°C
DS1867S-50 DS1867S-50 Analog Devices Inc./Maxim Integrated IC DGTL POT 50KOHM 256TAP 16SOIC En stock12640 pcs 5V Tube DS1867 400 750ppm/°C 256 Linear 50k Non-Volatile - 2 16-SOIC 16-SOIC (0.295', 7.50mm Width) ±20% Potentiometer Serial Cascade Pin Surface Mount -40°C ~ 85°C
MCP4242T-104E/UN MCP4242T-104E/UN Microchip Technology IC DGT POT 100KOHM 129TAP 10MSOP En stock34429 pcs 1.8V ~ 5.5V Tape & Reel (TR) MCP4242 75 150ppm/°C 129 Linear 100k Non-Volatile WiperLock™ 2 10-MSOP 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) ±20% Rheostat SPI - Surface Mount -40°C ~ 125°C
MAX5414EUD MAX5414EUD Analog Devices Inc./Maxim Integrated IC DGT POT 50KOHM 256TAP 14TSSOP En stock14570 pcs 2.7V ~ 5.5V Tube MAX5414 550 35ppm/°C 256 Linear 50k Volatile - 2 14-TSSOP 14-TSSOP (0.173", 4.40mm Width) ±25% Potentiometer SPI - Surface Mount -40°C ~ 85°C
CAT5271ZI-50-GT3 CAT5271ZI-50-GT3 onsemi IC DGTL POT 50KOHM 256TAP 10MSOP En stock9440 pcs 2.7V ~ 5.5V Tape & Reel (TR) CAT5271 100 ±100ppm/°C 256 Linear 50k Volatile - 2 10-MSOP 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) ±20% Potentiometer I²C - Surface Mount -40°C ~ 85°C
MAX5410EEE+ MAX5410EEE+ Analog Devices Inc./Maxim Integrated IC DGTL POT 10KOHM 32TAP 16QSOP En stock13488 pcs 5V Tube MAX5410 1000 35ppm/°C 32 Logarithmic 10k Volatile - 2 16-QSOP 16-SSOP (0.154", 3.90mm Width) ±30% Potentiometer SPI Mute, Zero-Cross Sense Surface Mount -40°C ~ 85°C
X9241AMSIZT1 X9241AMSIZT1 Renesas Electronics America Inc IC DGT POT 2/10/10/50KOHM 20SOIC En stock1956 pcs 5V Tape & Reel (TR) X9241 40 ±300ppm/°C 64 Linear 2k, 10k, 10k, 50k Non-Volatile XDCP™ 4 20-SOIC 20-SOIC (0.295", 7.50mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 85°C
MAX5403EUB MAX5403EUB Analog Devices Inc./Maxim Integrated IC DGTL POT 10KOHM 256TAP 10UMAX En stock14680 pcs 2.7V ~ 5.5V Tube MAX5403 275 35ppm/°C 256 Linear 10k Volatile - 2 10-uMAX/uSOP 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) ±25% Potentiometer SPI - Surface Mount -40°C ~ 85°C
CAT5172TBI-50GT3 CAT5172TBI-50GT3 onsemi IC DGT POT 50KOHM 256TAP SOT23-8 En stock16850 pcs 2.7V ~ 5.5V Tape & Reel (TR) CAT5172 100 ±100ppm/°C 256 Linear 50k Volatile - 1 SOT-23-8 SOT-23-8 ±20% Potentiometer SPI - Surface Mount -40°C ~ 85°C
AD5270BRMZ-20 AD5270BRMZ-20 Analog Devices Inc. IC DGT RHE 20KOHM 1024TAP 10MSOP En stock10690 pcs 2.7V ~ 5.5V, ±2.5V ~ 2.75V Tube AD5270 35 5ppm/°C 1024 Linear 20k Non-Volatile - 1 10-MSOP 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) ±1% Rheostat SPI Cascade Pin Surface Mount -40°C ~ 125°C
AD5241BR10 AD5241BR10 Analog Devices Inc. IC DGTL POT 10KOHM 256TAP 14SOIC En stock6760 pcs 2.7V ~ 5.5V, ±2.3V ~ 2.7V Tube AD5241 60 30ppm/°C 256 Linear 10k Volatile - 1 14-SOIC 14-SOIC (0.154", 3.90mm Width) ±30% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 105°C
X9315UMI-2.7T1 X9315UMI-2.7T1 Renesas Electronics America Inc IC DGTL POT 50KOHM 32TAP 8MSOP En stock8180 pcs 2.7V ~ 5.5V Tape & Reel (TR) X9315 400 ±300ppm/°C 32 Linear 50k Non-Volatile XDCP™ 1 8-MSOP 8-TSSOP, 8-MSOP (0.118', 3.00mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount -40°C ~ 85°C
MAX5483EUD+T MAX5483EUD+T Analog Devices Inc./Maxim Integrated IC DGT POT 10KOHM 1024TP 14TSSOP En stock11758 pcs 2.7V ~ 5.25V, ±2.5V ~ 5.25V Tape & Reel (TR) MAX5483 50 35ppm/°C 1024 Linear 10k Non-Volatile - 1 14-TSSOP 14-TSSOP (0.173', 4.40mm Width) ±25% Rheostat SPI, Up/Down (U/D, INC, CS) - Surface Mount -40°C ~ 85°C
CAT522WI CAT522WI Catalyst Semiconductor Inc. CONFIGURED DIGIPOT En stock14280 pcs 2.7V ~ 5.5V Bulk - - - - Linear 24k Non-Volatile CAT522 1 14-SOIC 14-SOIC (0.154", 3.90mm Width) ±20% Potentiometer Serial - Surface Mount -40°C ~ 85°C
MCP4022T-503E/CH MCP4022T-503E/CH Microchip Technology IC DGTL POT 50KOHM 64TAP SOT23-6 En stock39520 pcs 2.7V ~ 5.5V Tape & Reel (TR) MCP4022 70 150ppm/°C 64 Linear 50k Non-Volatile WiperLock™ 1 SOT-23-6 SOT-23-6 ±20% Rheostat Up/Down (U/D, CS) - Surface Mount -40°C ~ 125°C
CAT5138SDI-10GT3 CAT5138SDI-10GT3 onsemi IC DGTL POT 10KOHM 128TAP SC70-6 En stock19720 pcs 2.7V ~ 5.5V Tape & Reel (TR) CAT5138 85 ±300ppm/°C 128 Linear 10k Volatile - 1 SC-70-6 6-TSSOP, SC-88, SOT-363 ±20% Rheostat I²C - Surface Mount -40°C ~ 85°C
AD5273BRJ10-REEL7 AD5273BRJ10-REEL7 Analog Devices Inc. IC DGTL POT OTP 64POS SOT-23 En stock42472 pcs 2.7V ~ 5.5V Bulk AD5273 - 300ppm/°C 64 - 10k Non-Volatile - 1 SOT-23-8 SOT-23-8 - - I²C - Surface Mount -40°C ~ 105°C
X9317WM8I X9317WM8I Intersil DIGIPOT, 100 POSITIONS En stock6409 pcs 5V Tube - 200 ±300ppm/°C 100 Linear 10k Non-Volatile XDCP™ 1 8-MSOP 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount -40°C ~ 85°C
X9241AWSIZ X9241AWSIZ Renesas Electronics America Inc IC DGTL POT 10KOHM 64TAP 20SOIC En stock3375 pcs 5V Tube X9241 40 ±300ppm/°C 64 Linear 10k Non-Volatile XDCP™ 4 20-SOIC 20-SOIC (0.295', 7.50mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 85°C
AD5251BRU1 AD5251BRU1 Analog Devices Inc. IC DGTL POT 1KOHM 64TAP 14TSSOP En stock8100 pcs 2.7V ~ 5.5V, ±2.25V ~ 2.75V Tube AD5251 200 650ppm/°C 64 Linear 1k Non-Volatile - 2 14-TSSOP 14-TSSOP (0.173', 4.40mm Width) ±30% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 105°C
X9418YS24Z-2.7 X9418YS24Z-2.7 Renesas Electronics America Inc IC DGTL POT 2.5KOHM 64TAP 24SOIC En stock15780 pcs ±2.7V ~ 5.5V Tube X9418 150 ±300ppm/°C 64 Linear 2.5k Non-Volatile XDCP™ 2 24-SOIC 24-SOIC (0.295', 7.50mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount 0°C ~ 70°C
AD5280BRUZ200-R7 AD5280BRUZ200-R7 Analog Devices Inc. IC DGT POT 200KOHM 256TP 14TSSOP En stock8193 pcs 4.5V ~ 16.5V, ±5V Tape & Reel (TR) AD5280 60 30ppm/°C 256 Linear 200k Volatile - 1 14-TSSOP 14-TSSOP (0.173", 4.40mm Width) ±30% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 85°C
ISL95811UFUZ-T ISL95811UFUZ-T Intersil DIGIPOT, CMOS, PDSO8 En stock15923 pcs 2.7V ~ 5.5V Bulk - 70 ±45ppm/°C 256 Linear 50k Non-Volatile XDCP™ 1 8-MSOP 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) ±20% Potentiometer I²C - Surface Mount -40°C ~ 125°C
AD5144BRUZ10 AD5144BRUZ10 Analog Devices Inc. IC DGT POT 10KOHM 256TAP 20TSSOP En stock5219 pcs 2.3V ~ 5.5V, ±2.25V ~ 2.75V Tube AD5144 55 35ppm/°C 256 Linear 10k Non-Volatile - 4 20-TSSOP 20-TSSOP (0.173', 4.40mm Width) ±8% Potentiometer SPI Cascade Pin Surface Mount -40°C ~ 125°C
AD5110BCPZ10-RL7 AD5110BCPZ10-RL7 Analog Devices Inc. IC DGTL POT 10KOHM 128TAP 8LFCSP En stock27324 pcs 1.8V ~ 5.5V, 2.3V ~ 5.5V Tape & Reel (TR) AD5110 70 35ppm/°C 128 Linear 10k Non-Volatile - 1 8-LFCSP-UD (2x2) 8-UFDFN Exposed Pad, CSP ±8% Potentiometer I²C - Surface Mount -40°C ~ 125°C
X9401WS24IZ X9401WS24IZ Renesas Electronics America Inc IC DGTL POT 10KOHM 64TAP 24SOIC En stock14970 pcs 5V Tube X9401 150 ±300ppm/°C 64 Linear 10k Non-Volatile XDCP™ 4 24-SOIC 24-SOIC (0.295', 7.50mm Width) ±20% Potentiometer SPI Selectable Address Surface Mount -40°C ~ 85°C
ISL22313WFU10Z ISL22313WFU10Z Renesas Electronics America Inc IC DGTL POT 10KOHM 256TAP 10MSOP En stock10450 pcs 2.25V ~ 5.5V Tube ISL22313 70 ±150ppm/°C 256 Linear 10k Non-Volatile XDCP™ 1 10-MSOP 10-TFSOP, 10-MSOP (0.118', 3.00mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 125°C
ISL23328TFRUZ-TK ISL23328TFRUZ-TK Renesas Electronics America Inc IC DGTL POT 100KOHM 16UTQFN En stock13310 pcs 1.2V ~ 5.5V, 1.7V ~ 5.5V Tape & Reel (TR) ISL23328 70 45ppm/°C 128 Linear 100k Volatile XDCP™ 2 16-UTQFN (2.6x1.8) 16-UFQFN ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 125°C
MAX5456EEE+T MAX5456EEE+T Analog Devices Inc./Maxim Integrated IC DGTL POT 10KOHM 32TAP 16QSOP En stock11892 pcs ±2.7V ~ 5.5V Tape & Reel (TR) MAX5456 1000 50ppm/°C 32 Logarithmic 10k Volatile - 2 16-QSOP 16-SSOP (0.154', 3.90mm Width) ±30% Potentiometer Pushbutton Mute Surface Mount -40°C ~ 85°C
MCP4632T-502E/MF MCP4632T-502E/MF Microchip Technology IC DGTL POT 5KOHM 129TAP 10DFN En stock47650 pcs 1.8V ~ 5.5V Tape & Reel (TR) MCP4632 75 150ppm/°C 129 Linear 5k Volatile - 2 10-DFN (3x3) 10-VFDFN Exposed Pad ±20% Rheostat I²C Selectable Address Surface Mount -40°C ~ 125°C
ISL90841WIV1427Z ISL90841WIV1427Z Renesas Electronics America Inc IC DGT POT 10KOHM 256TAP 14TSSOP En stock7890 pcs 2.7V ~ 5.5V Tube ISL90841 70 ±45ppm/°C 256 Linear 10k Volatile XDCP™ 4 14-TSSOP 14-TSSOP (0.173', 4.40mm Width) ±20% Rheostat I²C Selectable Address Surface Mount -40°C ~ 85°C
MCP4532-104E/MS MCP4532-104E/MS Microchip Technology IC DGTL POT 100KOHM 129TAP 8MSOP En stock45600 pcs 1.8V ~ 5.5V Tube MCP4532 75 150ppm/°C 129 Linear 100k Volatile - 1 8-MSOP 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) ±20% Rheostat I²C Selectable Address Surface Mount -40°C ~ 125°C
AD5171BRJZ10-R7 AD5171BRJZ10-R7 Analog Devices Inc. IC DGTL POT 10KOHM 64TAP SOT23-8 En stock33957 pcs 2.7V ~ 5.5V Tape & Reel (TR) AD5171 60 35ppm/°C 64 Linear 10k OTP - 1 SOT-23-8 SOT-23-8 ±30% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 125°C
X95820WV14IZ-2.7 X95820WV14IZ-2.7 Renesas Electronics America Inc IC DGT POT 10KOHM 256TAP 14TSSOP En stock10343 pcs 2.7V ~ 5.5V Tube X95820 70 ±45ppm/°C 256 Linear 10k Non-Volatile XDCP™ 2 14-TSSOP 14-TSSOP (0.173", 4.40mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 85°C
AD5272BRMZ-100-RL7 AD5272BRMZ-100-RL7 Analog Devices Inc. IC DGT POT 100KOHM 1024TP 10MSOP En stock8078 pcs 2.7V ~ 5.5V, ±2.5V ~ 2.75V Tape & Reel (TR) AD5272 35 5ppm/°C 1024 Linear 100k Non-Volatile - 1 10-MSOP 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) ±1% Rheostat I²C Selectable Address Surface Mount -40°C ~ 125°C
MCP4541-104E/MS MCP4541-104E/MS Microchip Technology IC DGTL POT 100KOHM 129TAP 8MSOP En stock52330 pcs 1.8V ~ 5.5V Tube MCP4541 75 150ppm/°C 129 Linear 100k Non-Volatile - 1 8-MSOP 8-TSSOP, 8-MSOP (0.118', 3.00mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 125°C
AD5231BRUZ50-REEL7 AD5231BRUZ50-REEL7 Analog Devices Inc. IC DGT POT 50KOHM 1024TP 16TSSOP En stock8614 pcs 2.7V ~ 5.5V, ±2.25V ~ 2.75V Tape & Reel (TR) AD5231 50 600ppm/°C 1024 Linear 50k Non-Volatile - 1 16-TSSOP 16-TSSOP (0.173', 4.40mm Width) -40%, +20% Potentiometer SPI Cascade Pin Surface Mount -40°C ~ 85°C
CAT5124TBI-50-GT3 CAT5124TBI-50-GT3 Catalyst Semiconductor Inc. DIGITAL POT, 1 FUNC, 50000OHM, I En stock5680 pcs 2.7V ~ 5.5V Bulk - 80 30ppm/°C 32 Linear 50k Volatile CAT5124 1 SOT-23-6 SOT-23-6 - Rheostat Up/Down (U/D, CS) - Surface Mount -40°C ~ 85°C
MCP4023T-202E/CH MCP4023T-202E/CH Microchip Technology IC DGT POT 2.1KOHM 64TAP SOT23-6 En stock43730 pcs 2.7V ~ 5.5V Tape & Reel (TR) MCP4023 70 150ppm/°C 64 Linear 2.1k Non-Volatile WiperLock™ 1 SOT-23-6 SOT-23-6 ±20% Potentiometer Up/Down (U/D, CS) - Surface Mount -40°C ~ 125°C
CAT5110TBI-50GT3 CAT5110TBI-50GT3 onsemi IC DGTL POT 50KOHM 32TAP SOT23-6 En stock10800 pcs 2.7V ~ 5.5V Tape & Reel (TR) CAT5110 200 200ppm/°C 32 Linear 50k Volatile - 1 SOT-23-6 SOT-23-6 ±20% Rheostat Up/Down (U/D, CS) - Surface Mount -40°C ~ 85°C
MCP41100-E/SN MCP41100-E/SN Microchip Technology IC DGTL POT 100KOHM 256TAP 8SOIC En stock16963 pcs 2.7V ~ 5.5V Tube MCP41100 175 800ppm/°C 256 Linear 100k Volatile - 1 8-SOIC 8-SOIC (0.154", 3.90mm Width) ±30% Potentiometer SPI - Surface Mount -40°C ~ 125°C
X9015US8IZT1 X9015US8IZT1 Renesas Electronics America Inc IC DGTL POT 50KOHM 32TAP 8SOIC En stock7010 pcs 5V Tape & Reel (TR) X9015 200 ±300ppm/°C 32 Linear 50k Volatile XDCP™ 1 8-SOIC 8-SOIC (0.154', 3.90mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount -40°C ~ 85°C
MCP42100-E/P MCP42100-E/P Microchip Technology IC DGT POT 100KOHM 256TAP 14DIP En stock8991 pcs 2.7V ~ 5.5V Tube MCP42100 175 800ppm/°C 256 Linear 100k Volatile - 2 14-PDIP 14-DIP (0.300", 7.62mm) ±30% Potentiometer SPI Cascade Pin Through Hole -40°C ~ 125°C
CAT5171TBI-00GT3 CAT5171TBI-00GT3 onsemi IC DGTL POT 100KOHM 256TAP SOT23 En stock39460 pcs 2.7V ~ 5.5V Tape & Reel (TR) CAT5171 100 ±100ppm/°C 256 Linear 100k Volatile - 1 SOT-23-8 SOT-23-8 ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 85°C
X9C503S X9C503S Intersil DIGIPOT, 50000OHM, 100 PSTN En stock9735 pcs 5V Tube - 40 ±300ppm/°C 100 Linear 50k Non-Volatile XDCP™ 1 8-SOIC 8-SOIC (0.154", 3.90mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount 0°C ~ 70°C
CAT5113VI-00-GT3 CAT5113VI-00-GT3 onsemi IC DGTL POT 100KOHM 100TAP 8SOIC En stock13060 pcs 2.5V ~ 6V Tape & Reel (TR) CAT5113 1000 (Max) 300ppm/°C 100 Linear 100k Non-Volatile - 1 8-SOIC 8-SOIC (0.154', 3.90mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount -40°C ~ 85°C
X9119TV14IZ X9119TV14IZ Renesas Electronics America Inc IC DGTL POT 100KOHM 14TSSOP En stock16650 pcs 5V Tube X9119 150 ±300ppm/°C 1024 Linear 100k Non-Volatile XDCP™ 1 14-TSSOP 14-TSSOP (0.173", 4.40mm Width) ±20% Potentiometer I²C Selectable Address Surface Mount -40°C ~ 85°C
X9317WS8Z X9317WS8Z Renesas Electronics America Inc IC DGTL POT 10KOHM 100TAP 8SOIC En stock5915 pcs 5V Tube X9317 200 ±300ppm/°C 100 Linear 10k Non-Volatile XDCP™ 1 8-SOIC 8-SOIC (0.154', 3.90mm Width) ±20% Potentiometer Up/Down (U/D, INC, CS) - Surface Mount 0°C ~ 70°C
12345678...33
0 RFQ
Chariot (0 Items)
C'est vide.
Comparez la liste (0 Items)
C'est vide.
Retour

Vos commentaires sont importants!Chez Allelco, nous apprécions l'expérience utilisateur et nous nous efforçons de l'améliorer constamment.
Veuillez partager vos commentaires avec nous via notre formulaire de rétroaction, et nous répondrons rapidement.
Merci d'avoir choisi Allelco.

Sujet
Email
Remarques / Notes
Code de vérification
Faites glisser ou cliquez pour télécharger le fichier
Téléverser un fichier
Types: .xls, .xlsx, .doc, .docx, .jpg, .png et .pdf.Taille du fichier
MAX: 10 Mo