Name: MC78M15CDT
Brand: ON Semiconductor
SKU: MC78M15CDT
Availability: InStock
Rating: 5 (126 reviews)

MC78M15CDT

Nur als Referenz

Teilenummer	MC78M15CDT
Hersteller	ON Semiconductor
Beschreibung	IC REG LINEAR 15V 500MA DPAK-3
Datenblatt
Paket	TO-252-3, DPak (2 Leads + Tab), SC-63
ECAD
Auf Lager	141.192 piece(s)
Stückpreis	Request a Quote
Lieferzeit	Sofort lieferbar
Geschatte Leveringstijd	Mai 5 - Mai 10 (Kies voor snelle verzending)
Angebot anfordern

Zahlungsarten
Lieferservice

Wir bieten MC78M15CDT zum günstigen Preis auf dem Weltmarkt, senden Sie uns eine Quote Anfrage Preis bitte. Danke!
Um Ihren RFQ verarbeiten, fügen Sie bitte MC78M15CDT mit Menge in den BOM. Heisener.com erfordert keine Registrierung, um ein Angebot von MC78M15CDT fordern.

MC78M15CDT Spezifikationen

Hersteller	ON Semiconductor
Rubrik	Integrierte Schaltungen (ICs) - PMIC - Spannungsregler - Linear
Paket	TO-252-3, DPak (2 Leads + Tab), SC-63
ECAD
Serie	-
Ausgangskonfiguration	Positive
Ausgabetyp	Fixed
Anzahl der Regulierungsbehörden	1
Spannung - Eingang (Max)	35V
Spannung - Ausgang (Min / Fixed)	15V
Spannung - Ausgang (Max)	-
Spannungsabfall (Max)	-
Aktueller Output	500mA
Aktuell - Ruhig (Iq)	-
Strom - Versorgung (Max)	-
PSRR	70dB (120Hz)
Steuerungsfunktionen	-
Schutzfunktionen	Over Temperature, Short Circuit
Betriebstemperatur	0°C ~ 125°C
Befestigungsart	Surface Mount
Paket / Fall	TO-252-3, DPak (2 Leads + Tab), SC-63
Lieferantengerätepaket	DPAK-3

MC78M15CDT Packaging

MC78M15CDT FAQ

1. How to order MC78M15CDT on Heisener?

Currently, Heisener only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
2. How does Heisener guarantee that MC78M15CDT is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the MC78M15CDT. All suppliers must pass our qualification reviews before they can publish their products including MC78M15CDT on Heisener; we pay more attention to the channels and quality of MC78M15CDT products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the MC78M15CDT price and inventory displayed accurate?

The price and inventory of MC78M15CDT fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.
5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
6. What is the process for return or replacement of MC78M15CDT?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the MC78M15CDT we delivered, we will accept the replacement or return of the MC78M15CDT only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of MC78M15CDT.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations
7.How to contact us to get technical supports, such as MC78M15CDT pin diagram, MC78M15CDT datasheet?

If you need any after-sales service, please do not hesitate to contact us.

MC78M15CDT Verwandte Produkte

SIT8208AC-2F-18S-54.000000X	SiTIME, -20 TO 70C, 3225, 10PPM, 1.8V, 5, -, -	Aussicht
ECQ-V1103JM9	Panasonic Electronic Components, CAP FILM 10000PF 5% 100VDC RAD, Radial, -	Aussicht
PE0200WJ30233BJ1	Vishay Beyschlag, CAP CER 3000PF 14KV R85 DISK, Disk, Metal Fitting - Threaded, -	Aussicht
B43508C2687M60	EPCOS (TDK), CAP ALUM 680UF 20% 200V SNAP, Radial, Can - Snap-In, -	Aussicht
IS62WV5128EBLL-45HLI-TR	ISSI, Integrated Silicon Solution Inc, IC SRAM, -, -	Aussicht
AK8411VT	AKM Semiconductor Inc., IC ADC 16BIT 5MSPS 1CH 16TSSOP, -, -	Aussicht
UPT17E3/TR13	Microsemi Corporation, TVS DIODE 17VWM POWERMITE, DO-216AA, -	Aussicht
CRA06E0833K57FTA	Vishay Dale, RES ARRAY 4 RES 3.57K OHM 1206, 1206 (3216 Metric), Convex, Long Side Terminals, -	Aussicht
0522660189	Weidmuller, DEKAFIX GW 5 MARKED 189 50/CD, -, -	Aussicht
ESW-105-33-S-D-09	Samtec Inc., ELEVATED SOCKET STRIPS, -, -	Aussicht
TVS07RF-23-21A	Amphenol Aerospace Operations, CONN RCPT HSG MALE 21POS PNL MT, -, -	Aussicht
EMM22DTAS	Sullins Connector Solutions, CONN EDGE DUAL FMALE 44POS 0.156, -, -	Aussicht

MC78M15CDT Garantien

Servicegarantien

Wir garantieren 100% Kundenzufriedenheit.

Unser erfahrenes Verkaufsteam und unser technisches Support-Team unterstützen unsere Dienstleistungen, um alle unsere Kunden zufriedenzustellen.

Qualitätsgarantien

Wir bieten 90 Tage Garantie.

Wenn die Artikel, die Sie erhalten haben, nicht in perfekter Qualität sind, sind wir für Ihre Rückerstattung oder den Ersatz verantwortlich. Die Artikel müssen jedoch in ihrem ursprünglichen Zustand zurückgesandt werden.

Globale Lieferketten - Zuverlässige und autorisierte Distributorenressourcen

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG D# E02:0323_00076037	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK Tube	0
MC78M15CDTRKG D# V72:2272_07323263	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R	0
MC78M15CDTT5G D# V36:1790_07278339	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R	0

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTT5G D# MC78M15CDTT5G	ON Semiconductor	LDO Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R - Bulk (Alt: MC78M15CDTT5G) RoHS: Compliant	0
MC78M15CDTG D# MC78M15CDTG	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK Rail - Rail/Tube (Alt: MC78M15CDTG) RoHS: Compliant	0
MC78M15CDTRKG D# MC78M15CDTRKG	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R - Bulk (Alt: MC78M15CDTRKG) RoHS: Compliant	0

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTRKG

D# MC78M15CDTRKG

ON Semiconductor

Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R (Alt: MC78M15CDTRKG)

RoHS: Compliant

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTT5G D# MC78M15CDTT5G	ON Semiconductor	LDO Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R (Alt: MC78M15CDTT5G) RoHS: Compliant	0
MC78M15CDTG D# MC78M15CDTG	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK Rail (Alt: MC78M15CDTG) RoHS: Compliant	0
MC78M15CDTRKG D# MC78M15CDTRKG	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R (Alt: MC78M15CDTRKG) RoHS: Compliant	0

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG	ON Semiconductor		185
MC78M15CDTRK	Motorola Semiconductor Products		1630
MC78M15CDT	ON Semiconductor		3205

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDT	Motorola Mobility LLC	Min Qty 9	1630
MC78M15CDTRK	Motorola Mobility LLC	Min Qty 9	1630
MC78M15CDTG	ON Semiconductor	LDO Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK Rail	2570
MC78M15CDTT5G	ON Semiconductor	ANA 500MA 15V VREG - Tape and Reel	0
MC78M15CDTRKG	ON Semiconductor	LDO Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R	7500

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTG

D# C1S541900402975

ON Semiconductor

Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK Tube

RoHS: Compliant

pbFree: Yes

Min Qty: 1

Container: Tube

2150

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTRKG

ON Semiconductor

Linear Voltage Regulator IC Positive Fixed 1 Output 15V 500mA DPAK-3

290

MC78M15CDTG

ON Semiconductor

Fixed 35V 15V TO-252-3 Dropout Regulators(LDO) RoHS

2219

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTG

ON Semiconductor

RoHS: Compliant

MC78M15CDTRKG

ON Semiconductor

RoHS: Compliant

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG D# MC78M15CDTGOS-ND	ON Semiconductor	IC REG LINEAR 15V 500MA DPAK	6439
MC78M15CDTRK D# MC78M15CDTRKOSTR-ND	ON Semiconductor	IC REG LINEAR 15V 500MA DPAK	0
MC78M15CDTRKG D# MC78M15CDTRKGOSCT-ND	ON Semiconductor	IC REG LINEAR 15V 500MA DPAK	7180
MC78M15CDTT5G D# 2156-MC78M15CDTT5G-OS-ND	Rochester Electronics LLC	IC REG LINEAR 15V 500MA DPAK	5000
MC78M15CDT D# MC78M15CDT-ND	ON Semiconductor	IC REG LINEAR 15V 500MA DPAK	0

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTRKG

D# MC78M15CDTRKG

Motorola Semiconductor Products

Industry Leading ISO:9001/AS9120A Stocking Distributor of Obsolete & Hard to Find IC's/Semi's, Specializing in Altera/Xilinx. In-House Counterfeit Detection Lab. In Business 20 Years. Free Shipping on Orders Over $250. Buy American, Buy Direct

1744

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDT

ON Semiconductor

In stock shipping within 2days

5260

MC78M15CDTG

ON Semiconductor

In stock shipping within 2days

241

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTRKG D# 2534190	ON Semiconductor	LDO, FIXED, 15V, 0.5A, TO-252-3 RoHS: Compliant Min Qty: 5 Container: Cut Tape	110
MC78M15CDTT5G D# 3368470RL	ON Semiconductor	VOLT REG, FIXED, 15V, 0.5A, 0TO125DEG C RoHS: Compliant Min Qty: 5 Container: Reel	0
MC78M15CDTG D# 1211124	ON Semiconductor	IC, V REG +15V, SMD, 78M15, TO-252-3 RoHS: Compliant Min Qty: 5 Container: Each	5887

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTRKG

NEW AND ORGINAL. ISRAEL W.HOUSE

7250

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTRKG

ON Semiconductor

MC78M00C Series 500 mA 15 V Fixed Output SMT LDO Voltage Regulator -TO-252

RoHS: Compliant

pbFree: Yes

100000

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTT	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	232
MC78M15CDTRKG	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	38744
MC78M15CDTR	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	106
MC78M15CDT1	Motorola Semiconductor Products	OEM/CM QUOTES ONLY \| NO BROKERS	71
MC78M15CDT	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	29000
MC78M15CDTRK	Motorola Semiconductor Products	OEM/CM QUOTES ONLY \| NO BROKERS	10112
MC78M15CDTG	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	30757
MC78M15CDTT5G	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	5800
MC78M15CDTAKG	ON Semiconductor	OEM/CM QUOTES ONLY \| NO BROKERS	9626

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTG

D# C328031

ON Semiconductor

2219

MC78M15CDTRKG

D# C95992

ON Semiconductor

4995

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDTRKG

ON Semiconductor

in stock - can ship the same day

2319

MC78M15CDT

ON Semiconductor

in stock - can ship the same day

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTRKG	ON Semiconductor	OEM/CM Immediate delivery	20000
MC78M15CDT	N	OEM/CM Immediate delivery	2870
MC78M15CDTG	ON Semiconductor	OEM/CM Immediate delivery	435

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG D# 863-MC78M15CDTG	ON Semiconductor	Linear Voltage Regulators 15V 500mA Positive RoHS: Compliant	2670
MC78M15CDTRKG D# 863-MC78M15CDTRKG	ON Semiconductor	Linear Voltage Regulators 15V 500mA Positive RoHS: Compliant	14007
MC78M15CDTT5G D# 863-MC78M15CDTT5G	ON Semiconductor	Linear Voltage Regulators ANA 500mA 15V VREG RoHS: Compliant	2828

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG D# XSFP00000148748	ON SEMICONDUCTOR	MC78M00C Series 500 mA 15 V Fixed Output SMT LDO Voltage Regulator -DPAK	11550
MC78M15CDTRKG D# XSFP00000055220	ON SEMICONDUCTOR	MC78M00C Series 500 mA 15 V Fixed Output SMT LDO Voltage Regulator -TO-252	112500
MC78M15CDTT5G D# XSKDRABS0105073	ON SEMICONDUCTOR	ANA 500MA 15V VREG	10000

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTT5G D# 54AH9219	ON Semiconductor	VOLT REG, FIXED, 15V, 0.5A, 0TO125DEG C ROHS COMPLIANT: YES RoHS: Compliant Min Qty: 5 Container: Cut Tape	2500
MC78M15CDTG D# 97K4718	ON Semiconductor	IC, V REG +15V, SMD, 78M15, TO-252-3, Fixed Output Voltage Nom.:15V, Adjustable Output Voltage Min:-, Adjustable Output Voltage Max:-, Input Voltage Min:23V, Input Voltage Max:35V, Product Range:7815 Voltage Regulators, Output RoHS Compliant: Yes RoHS: Compliant Min Qty: 5 Container: Bulk	5316
MC78M15CDTRKG D# 81Y6732	ON Semiconductor	LDO, FIXED, 15V, 0.5A, TO-252-3, Output Type:Fixed, Input Voltage Min:23V, Input Voltage Max:35V, Fixed Output Voltage Nom.:15V, Adjustable Output Voltage Min:-, Adjustable Output Voltage Max:-, Output Current:500mA, Dropout Voltage RoHS Compliant: Yes RoHS: Compliant Min Qty: 5 Container: Cut Tape	110
MC78M15CDTRKG. D# 26AC1960	ON Semiconductor	Output Type:Fixed, Input Voltage Min:23V, Input Voltage Max:35V, Fixed Output Voltage Nom.:15V, Adjustable Output Voltage Min:-, Adjustable Output Voltage Max:-, Output Current:500mA, Dropout Voltage Vdo:2V, No. of Pins:3Pins RoHS Compliant: Yes RoHS: Compliant Min Qty: 2500 Container: TAPE & REEL - FULL	0

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG D# NS-MC78M15CDTG	ON Semiconductor	OEM/CM ONLY	2779
MC78M15CDT1 D# NS-MC78M15CDT1	Motorola Semiconductor Products	OEM/CM ONLY	5139
MC78M15CDTRKG D# NS-MC78M15CDTRKG	ON Semiconductor	OEM/CM ONLY	10522
MC78M15CDTRK D# NS-MC78M15CDTRK	ON Semiconductor	OEM/CM ONLY	7386
MC78M15CDT D# NS-MC78M15CDT	ON Semiconductor	OEM/CM ONLY	7577
MC78M15CDTT5G D# NS-MC78M15CDTT5G	ON Semiconductor	OEM/CM ONLY	5372

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDT	ON Semiconductor	Voltage Regulator, +15V, Bi-Polar, 3 Pin, Plastic, SIP	169
MC78M15CDTRK	ON Semiconductor	Voltage Regulator, +15V, Bi-Polar, 3 Pin, Plastic, SIP	5000
MC78M15CDTG	ON Semiconductor	Voltage Regulator, +15V, Bi-Polar, 3 Pin, Plastic, SIP	148

Teilenummer

Hersteller

Beschreibung

Lager

MC78M15CDT

D# MC78M15CDT

Motorola Semiconductor Products

Inventory R

225

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTT5G D# 7852378	ON Semiconductor	ON Semiconductor, 15 V Linear Voltage Regulator, 700mA, 1-Channel 3-Pin, DPAK MC78M15CDTT5G, TA Min Qty: 10 Container: Ammo Pack	640
MC78M15CDTG D# 5164935	ON Semiconductor	ON Semiconductor, 15 V Linear Voltage Regulator, 700mA, 1-Channel 3-Pin, DPAK MC78M15CDTG, EA Min Qty: 1 Container: Bulk	66
MC78M15CDTRKG D# 6889307P	ON Semiconductor	ON Semiconductor, 15 V Linear Voltage Regulator, 700mA, 1-Channel 3-Pin, DPAK MC78M15CDTRKG, RL Min Qty: 2 Container: Reel	530

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTRKG	ON Semiconductor	Fixed Positive Standard Regulator, 15VBIPolar, PSSO2 RoHS: Compliant	11239
MC78M15CDTT5G	ON Semiconductor	500MA 15V Voltage Regulator RoHS: Compliant	5000
MC78M15CDTG	ON Semiconductor	Fixed Positive Standard Regulator, 15VBIPolar, PSSO2 RoHS: Compliant	33751

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTAKG	ON Semiconductor	OEM/CM ONLY	8314
MC78M15CDTRKG	ON Semiconductor	OEM/CM ONLY	23521
MC78M15CDTT	ON Semiconductor	OEM/CM ONLY	216
MC78M15CDTT5G	ON Semiconductor	OEM/CM ONLY	12516
MC78M15CDT	Motorola Semiconductor Products	OEM/CM ONLY	10057
MC78M15CDTR	ON Semiconductor	OEM/CM ONLY	15016
MC78M15CDT1	Motorola Semiconductor Products	OEM/CM ONLY	77
MC78M15CDTG	ON Semiconductor	OEM/CM ONLY	29491
MC78M15CDTRK	ON Semiconductor	OEM/CM ONLY	28521

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG	ON Semiconductor	IN stock Immediate delivery	430
MC78M15CDTRKG	ON Semiconductor	IN stock Immediate delivery	19985
MC78M15CDT	N	IN stock Immediate delivery	2885

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDT	N	shipping today	6538
MC78M15CDTG	ON Semiconductor	shipping today	4499
MC78M15CDTRK	ON Semiconductor	shipping today	74
MC78M15CDTRKG	ON Semiconductor	shipping today	20996

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTG D# 53366231	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK Tube	0
MC78M15CDTRKG D# 53464887	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R	0
MC78M15CDTT5G D# 26621096	ON Semiconductor	Standard Regulator Pos 15V 0.5A 3-Pin(2+Tab) DPAK T/R	0

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTRKGOSCT	ON Semiconductor	RFQ	13586
MC78M15CDT	ON Semiconductor	RFQ	1310
MC78M15CDTGOS	ON Semiconductor	RFQ	1588
MC78M15CDTRKGOSTR	ON Semiconductor	RFQ	11298

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDT	ON Semiconductor	IC REG LDO 15V 0.5A DPAK	2322
MC78M15CDTG	ON Semiconductor	IC REG LDO 15V 0.5A DPAK	2365
MC78M15CDTRKG	ON Semiconductor	IC REG LDO 15V 0.5A DPAK	158454

Teilenummer	Hersteller	Beschreibung	Lager
MC78M15CDTRKG D# 2534190	ON Semiconductor	LDO, FIXED, 15V, 0.5A, TO-252-3 RoHS: Compliant Min Qty: 1 Container: Cut Tape	110
MC78M15CDTT5G D# 3368470	ON Semiconductor	VOLT REG, FIXED, 15V, 0.5A, 0TO125DEG C RoHS: Compliant Min Qty: 5 Container: Cut Tape	2500
MC78M15CDTG D# 1211124	ON Semiconductor	IC, V REG +15V, SMD, 78M15, TO-252-3 RoHS: Compliant Min Qty: 1 Container: Each	5302

Quick Inquiry

MC78M15CDT

Zertifizierte Qualität

Das Qualitätsversprechen von Heisener hat unsere Prozesse für Beschaffung, Prüfung, Versand und jeden Schritt dazwischen geprägt. Diese Grundlage liegt jeder Komponente zugrunde, die wir verkaufen.

ISO9001:2015, ICAS, IAF, UKAS