.hide-partial { max-height: none; } .show-more { display: none; }

16 kB Embedded Processors & Controllers

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Embedded Processors & Controllers

List Images

Results: 2,767

Applied Filters:

Program Memory Size = 16 kB

Manufacturer

Product Type

Mounting Style

Package / Case

Core

Data Bus Width

Maximum Clock Frequency

L1 Cache Instruction Memory

L1 Cache Data Memory

Data RAM Size

ADC Resolution

Number of I/Os

Minimum Operating Temperature

Maximum Operating Temperature

Qualification

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CAD) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Mounting Style	Package / Case	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution	Number of I/Os	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Packaging
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F24Q35-E/SP Microchip Technology 1: $3.90 300In Stock New Product	Mfr. Part # PIC18F24Q35-E/SP Mouser Part # 579-PIC18F24Q35-E/SP New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	300In Stock	$3.90 $3.59 $3.24	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	SPDIP-28	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	24 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F24Q35-E/SS Microchip Technology 1: $1.96 581In Stock New Product	Mfr. Part # PIC18F24Q35-E/SS Mouser Part # 579-PIC18F24Q35-E/SS New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	581In Stock	$1.96 $1.79 $1.63	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	SSOP-28	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	24 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F24Q35-E/3LW Microchip Technology 1: $1.89 637In Stock New Product	Mfr. Part # PIC18F24Q35-E/3LW Mouser Part # 579-PIC18F24Q35E3LW New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	637In Stock	$1.89 $1.74 $1.57	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	VQFN-28	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	24 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F44Q35-E/PT Microchip Technology 1: $2.48 480In Stock New Product	Mfr. Part # PIC18F44Q35-E/PT Mouser Part # 579-PIC18F44Q35-E/PT New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	480In Stock	$2.48 $2.26 $2.06	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	TQFP-48	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	43 I/O	- 40 C	+ 125 C		Tray
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F44Q35-E/P Microchip Technology 1: $5.34 220In Stock New Product	Mfr. Part # PIC18F44Q35-E/P Mouser Part # 579-PIC18F44Q35-E/P New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	220In Stock	$5.34 $4.90 $4.44	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	PDIP-40	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	35 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F44Q35-E/NHX Microchip Technology 1: $2.40 511In Stock New Product	Mfr. Part # PIC18F44Q35-E/NHX Mouser Part # 579-PIC18F44Q35ENHX New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	511In Stock	$2.40 $2.22 $2.00	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	VQFN-40	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	35 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F54Q35-I/PT Microchip Technology 1: $2.42 500In Stock New Product	Mfr. Part # PIC18F54Q35-I/PT Mouser Part # 579-PIC18F54Q35-I/PT New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	500In Stock	$2.42 $2.22 $2.00	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	TQFP-48	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	43 I/O	- 40 C	+ 85 C		Tray
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F54Q35-E/PT Microchip Technology 1: $2.65 500In Stock New Product	Mfr. Part # PIC18F54Q35-E/PT Mouser Part # 579-PIC18F54Q35-E/PT New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	500In Stock	$2.65 $2.43 $2.20	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	TQFP-48	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	43 I/O	- 40 C	+ 125 C		Tray
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators PIC18F54Q35-E/6MX Microchip Technology 1: $2.59 488In Stock New Product	Mfr. Part # PIC18F54Q35-E/6MX Mouser Part # 579-PIC18F54Q35E6MX New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 128 Basic Logic Elements CLB, PDID, MVIO,10b ADCC, 8b DAC, 2 Analog Comparators Learn More about Microchip Technology microchip pic18f q35 mcus	Datasheet	488In Stock	$2.59 $2.38 $2.16	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	VQFN-48	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	43 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 16KB, 2KB RAM, 256 EE, 25 I/O, CIPs, 10b ADCC, 5b DAC, Comp, 16b PWM, CCP, WWDT PIC18F24Q10-E/MLVAO Microchip Technology 1: $1.70 666In Stock New Product	Mfr. Part # PIC18F24Q10-E/MLVAO Mouser Part # 579-PIC824Q10EMLVAO New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB, 2KB RAM, 256 EE, 25 I/O, CIPs, 10b ADCC, 5b DAC, Comp, 16b PWM, CCP, WWDT	Datasheet	666In Stock	$1.70 $1.54 $1.40	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	QFN-28	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	25 I/O	- 40 C	+ 125 C	AEC-Q100	Tube
8-bit Microcontrollers - MCU 16KB, 2KB RAM, 256 EE, 25 I/O, CIPs, 10b ADCC, 5b DAC, Comp, 16b PWM, CCP, WWDT PIC18F24Q10-E/SOVAO Microchip Technology 1: $1.70 675In Stock New Product	Mfr. Part # PIC18F24Q10-E/SOVAO Mouser Part # 579-PIC824Q10ESOVAO New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB, 2KB RAM, 256 EE, 25 I/O, CIPs, 10b ADCC, 5b DAC, Comp, 16b PWM, CCP, WWDT	Datasheet	675In Stock	$1.70 $1.54 $1.40	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	SOIC-28	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	25 I/O	- 40 C	+ 125 C	AEC-Q100	Tube
ARM Microcontrollers - MCU Cortex MO+ w/16K flash and 2K SRAM for cost sensitive applications PIC32CM1602GV00064-E/V2X Microchip Technology 1: $1.40 795In Stock New Product	Mfr. Part # PIC32CM1602GV00064-E/V2X Mouser Part # 579-PC321602GV64EV2X New Product	Microchip Technology	ARM Microcontrollers - MCU Cortex MO+ w/16K flash and 2K SRAM for cost sensitive applications Learn More about Microchip Technology microchip pic32cm16 32 gv00 mcus	Datasheet	795In Stock	$1.40 $1.39	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	TQFP-64	ARM Cortex M0+	32 bit	32 MHz	16 kB	2 kB	12 bit	52 I/O	- 40 C	+ 125 C		Tray
8-bit Microcontrollers - MCU 16MHz, 16KB, SSOP20, 2xADC, PTC, EXT 125C, Tray ATTINY1616-XF Microchip Technology 1: $1.47 671In Stock New Product	Mfr. Part # ATTINY1616-XF Mouser Part # 579-ATTINY1616-XF New Product	Microchip Technology	8-bit Microcontrollers - MCU 16MHz, 16KB, SSOP20, 2xADC, PTC, EXT 125C, Tray Learn More about Microchip Technology microchip attiny1614 6 7	Datasheet	671In Stock	$1.47 $1.34 $1.21	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	SSOP-20	AVR	8 bit	16 MHz	16 kB	2 kB	10 bit	18 I/O	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 20MHz, 16KB, SSOP20, 2xADC, PTC, EXT 105C, Tray ATTINY1616-XN Microchip Technology 1: $1.32 793In Stock New Product	Mfr. Part # ATTINY1616-XN Mouser Part # 579-ATTINY1616-XN New Product	Microchip Technology	8-bit Microcontrollers - MCU 20MHz, 16KB, SSOP20, 2xADC, PTC, EXT 105C, Tray Learn More about Microchip Technology microchip attiny1614 6 7	Datasheet	793In Stock	$1.32 $1.22 $1.11	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	SSOP-20	AVR	8 bit	16 MHz	16 kB	2 kB	10 bit	18 I/O	- 40 C	+ 105 C		Tube
ARM Microcontrollers - MCU Cortex MO+ w/16K flash and 2K SRAM for cost sensitive applications PIC32CM1602GV00048-E/Y8X Microchip Technology 1: $1.28 875In Stock New Product	Mfr. Part # PIC32CM1602GV00048-E/Y8X Mouser Part # 579-PC321602GV48EY8X New Product	Microchip Technology	ARM Microcontrollers - MCU Cortex MO+ w/16K flash and 2K SRAM for cost sensitive applications Learn More about Microchip Technology microchip pic32cm16 32 gv00 mcus	Datasheet	875In Stock	$1.28 $1.27	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	TQFP-48	ARM Cortex M0+	32 bit	32 MHz	16 kB	2 kB	12 bit	38 I/O	- 40 C	+ 125 C		Tray
8-bit Microcontrollers - MCU 16KB, 2KB RAM, 256 EE, 25 I/O, CIPs, 10b ADCC, 5b DAC, Comp, 16b PWM, CCP, WWDT PIC18F24Q10-E/SSVAO Microchip Technology 1: $1.64 695In Stock New Product	Mfr. Part # PIC18F24Q10-E/SSVAO Mouser Part # 579-PIC824Q10ESSVAO New Product	Microchip Technology	8-bit Microcontrollers - MCU 16KB, 2KB RAM, 256 EE, 25 I/O, CIPs, 10b ADCC, 5b DAC, Comp, 16b PWM, CCP, WWDT	Datasheet	695In Stock	$1.64 $1.48 $1.35	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	SSOP-28	PIC18	8 bit	64 MHz	16 kB	1 kB	10 bit	25 I/O	- 40 C	+ 125 C	AEC-Q100	Tube
8-bit Microcontrollers - MCU 16KBFlash 512byteRAM 256bytesEEPROM PIC18F14K22T-I/SO Microchip Technology 1: $3.63 9,358In Stock	Mfr. Part # PIC18F14K22T-I/SO Mouser Part # 579-PIC18F14K22TI/SO	Microchip Technology	8-bit Microcontrollers - MCU 16KBFlash 512byteRAM 256bytesEEPROM Learn More about Microchip Technology microchipxlp	Datasheet	9,358In Stock	Cut Tape $3.63 $3.53 Reel $3.01 MouseReel Available	Min.: 1 Mult.: 1 : 1,600	8-bit Microcontrollers - MCU	SMD/SMT	SOIC-20	PIC18	8 bit	64 MHz	16 kB	512 B	10 bit	17 I/O	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 16Kb Flash 1Kb SRAM PSoC CY8C22545-24AXI Infineon Technologies 1: $13.39 2,928In Stock	Mfr. Part # CY8C22545-24AXI Mouser Part # 727-CY8C22545-24AXI	Infineon Technologies	8-bit Microcontrollers - MCU 16Kb Flash 1Kb SRAM PSoC Learn More about Infineon Technologies cypress psoc	Datasheet	2,928In Stock	$13.39 $10.40 $9.19 $8.44 View $8.41 $8.05 $7.93 $7.49	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	SMD/SMT	TQFP-44	M8C	8 bit	24 MHz	16 kB	1 kB	8 bit	38 I/O	- 40 C	+ 85 C		Tray
8-bit Microcontrollers - MCU 16KB, 2KB RAM, 28p, 24MHz, MVIO, 12b ADC, ZCD, DAC, 2xUART, SPI, TWI AVR16DD28T-I/SS Microchip Technology 1: $1.56 2,050In Stock	Mfr. Part # AVR16DD28T-I/SS Mouser Part # 579-AVR16DD28T-I/SS	Microchip Technology	8-bit Microcontrollers - MCU 16KB, 2KB RAM, 28p, 24MHz, MVIO, 12b ADC, ZCD, DAC, 2xUART, SPI, TWI Learn More about Microchip Technology microchip avr16 32dd28 32 mcus	Datasheet	2,050In Stock	Cut Tape $1.56 $1.53 Reel $1.30 MouseReel Available	Min.: 1 Mult.: 1 : 2,100	8-bit Microcontrollers - MCU	SMD/SMT	SSOP-28	AVR	8 bit	24 MHz	16 kB	2 kB	12 bit	22 I/O	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 2x OPA, 12-bit differential ADCC with computation, 8/10-bit DACs, 2 AC, APM, Virtual Port, PWM, CCP, CWG, HLT, WWDT, SCAN/CRC, ZCD, PPS, USART, SPI/I2C, IDLE/DOZE/PMD PIC18F24Q71-I/SP Microchip Technology 1: $2.64 899In Stock	Mfr. Part # PIC18F24Q71-I/SP Mouser Part # 579-PIC18F24Q71-I/SP	Microchip Technology	8-bit Microcontrollers - MCU 16KB Flash, 1KB RAM, 2x OPA, 12-bit differential ADCC with computation, 8/10-bit DACs, 2 AC, APM, Virtual Port, PWM, CCP, CWG, HLT, WWDT, SCAN/CRC, ZCD, PPS, USART, SPI/I2C, IDLE/DOZE/PMD Learn More about Microchip Technology microchip pic18 q71 mcus	Datasheet	899In Stock	$2.64 $2.42 $2.19	Min.: 1 Mult.: 1	8-bit Microcontrollers - MCU	Through Hole	SPDIP-28	PIC18	8 bit	64 MHz	16 kB	1 kB	12 bit	26 I/O	- 40 C	+ 85 C		Tube
8-bit Microcontrollers - MCU 20MHz, 16KB, QFN ATMEGA1608-MFR Microchip Technology 1: $1.84 33,231In Stock	Mfr. Part # ATMEGA1608-MFR Mouser Part # 579-ATMEGA1608-MFR	Microchip Technology	8-bit Microcontrollers - MCU 20MHz, 16KB, QFN Learn More about Microchip Technology microchip atmega1608 mcu	Datasheet	33,231In Stock	Cut Tape $1.84 $1.79 Reel $1.51 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	8-bit Microcontrollers - MCU	SMD/SMT	VQFN-32	AVR	8 bit	20 MHz	16 kB	2 kB	10 bit	27 I/O	- 40 C	+ 125 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 20MHZ QFN 85C GRN ATTINY1617-MNR Microchip Technology 1: $1.67 24,194In Stock	Mfr. Part # ATTINY1617-MNR Mouser Part # 556-ATTINY1617MNR	Microchip Technology	8-bit Microcontrollers - MCU 20MHZ QFN 85C GRN Learn More about Microchip Technology microchip attiny1614 6 7	Datasheet	24,194In Stock	Cut Tape $1.67 $1.64 Reel $1.64	Min.: 1 Mult.: 1 : 6,000	8-bit Microcontrollers - MCU	SMD/SMT	QFN-24	AVR	8 bit	20 MHz	16 kB	2 kB	10 bit	22 I/O	- 40 C	+ 105 C	AEC-Q100	Reel, Cut Tape
8-bit Microcontrollers - MCU 16KB, 2KB RAM, 14p, 24MHz, MVIO, 12b ADC, ZCD, DAC, 2xUART, SPI, TWI AVR16DD14T-I/SL Microchip Technology 1: $1.27 1,836In Stock	Mfr. Part # AVR16DD14T-I/SL Mouser Part # 579-AVR16DD14T-I/SL	Microchip Technology	8-bit Microcontrollers - MCU 16KB, 2KB RAM, 14p, 24MHz, MVIO, 12b ADC, ZCD, DAC, 2xUART, SPI, TWI Learn More about Microchip Technology microchip avr32 16dd14 20 mcus	Datasheet	1,836In Stock	Cut Tape $1.27 $1.23 Reel $1.05 MouseReel Available	Min.: 1 Mult.: 1 : 2,600	8-bit Microcontrollers - MCU	SMD/SMT	SOIC-14		8 bit	24 MHz	16 kB	2 kB	12 bit	10 I/O	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU Cortex MO+ w/16K flash and 2K SRAM for cost sensitive applications PIC32CM1602GV00048-E/U5B Microchip Technology 1: $1.32 832In Stock New Product	Mfr. Part # PIC32CM1602GV00048-E/U5B Mouser Part # 579-PC321602GV48EU5B New Product	Microchip Technology	ARM Microcontrollers - MCU Cortex MO+ w/16K flash and 2K SRAM for cost sensitive applications Learn More about Microchip Technology microchip pic32cm16 32 gv00 mcus	Datasheet	832In Stock	$1.32 $1.31	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	VQFN-48	ARM Cortex M0+	32 bit	32 MHz	16 kB	2 kB	12 bit	38 I/O	- 40 C	+ 125 C		Tray
16-bit Microcontrollers - MCU 16-BIT GENERAL MCU RL78/F25 512K LFQFP100 -40 to 125 C R7F125FPL4AFB-C#UA0 Renesas Electronics 1: $13.31 86In Stock New Product	Mfr. Part # R7F125FPL4AFB-C#UA0 Mouser Part # 968-7F125FPL4AFBCUA0 New Product	Renesas Electronics	16-bit Microcontrollers - MCU 16-BIT GENERAL MCU RL78/F25 512K LFQFP100 -40 to 125 C	Datasheet	86In Stock	$13.31 $9.98 $8.50 $7.07 View $6.83 $6.77 Quote	Min.: 1 Mult.: 1	16-bit Microcontrollers - MCU	SMD/SMT	QFP-100	RL78	16 bit	80 MHz	16 kB	40 kB	12 bit	84 I/O	- 40 C	+ 125 C		Tray