22581 Search Results

22581 Price and Stock

Filter by Manufacturer


Molex 1722581104 CONN RCPT HSG 4POS 3.50MM
Distributors	Part	Package	Stock	Lead Time	Min Order Qty	Price	Buy
DigiKey	1722581104	Bag	10,140		1	1 $0.28 10 $0.225 100 $0.1832 1000 $0.14935 10000 $0.1377	Buy Now
Avnet Americas	1722581104	Bulk		20 Weeks, 3 Days	1	1 $0.488 10 $0.318 100 $0.267 1000 $0.267 10000 $0.267	Buy Now
TTI	1722581104	Bulk	9		30	1 - 10 - 100 $0.168 1000 $0.168 10000 $0.168	Buy Now
TE Connectivity 1932258-1 CONN RCPT USB3.0 TYPEA 9POS R/A
Distributors	Part	Package	Stock	Lead Time	Min Order Qty	Price	Buy
DigiKey	1932258-1	Tray	5,294		1	1 $7.36 10 $5.994 100 $5.30025 1000 $4.1908 10000 $4.1908	Buy Now
Avnet Americas	1932258-1	Tray	20,499	5 Weeks	1	1 $3.24872 10 $3.21286 100 $3.12902 1000 $3.12902 10000 $3.12902	Buy Now
	1932258-1	Bulk		18 Weeks, 1 Days	1	1 $6.19 10 $5.78 100 $4.98 1000 $4.98 10000 $4.98	Buy Now
Mouser Electronics	1932258-1		1,804			1 $6.26 10 $5.75 100 $4.58 1000 $4.58 10000 $4.58	Buy Now
Newark	1932258-1	Bulk	658		1	1 $4.66 10 $4.66 100 $4.3 1000 $4.3 10000 $4.3	Buy Now
Bristol Electronics	1932258-1		6,382			1 - 10 - 100 - 1000 - 10000 -	Get Quote
	1932258-1		1,290		1	1 $5.04 10 $3.276 100 $2.3522 1000 $2.0664 10000 $2.0664	Buy Now

TTI	1932258-1	Tray			10,368	1 - 10 - 100 - 1000 - 10000 -	Buy Now
TME	1932258-1		43,524			1 - 10 - 100 - 1000 - 10000 -	Buy Now
Interstate Connecting Components	1932258-1		1,555			1 - 10 - 100 - 1000 $4.17 10000 $4.1086	Buy Now
Powell Electronics	1932258-1		27		1	1 $13.9694 10 $13.9694 100 $13.9694 1000 $13.9694 10000 $13.9694	Buy Now
Chip 1 Exchange	1932258-1		57,857			1 - 10 - 100 - 1000 - 10000 -	Get Quote
Avnet Abacus	1932258-1			5 Weeks	10,368	1 - 10 - 100 - 1000 - 10000 -	Buy Now
	1932258-1			9 Weeks	20	1 - 10 - 100 - 1000 - 10000 -	Buy Now
Avnet Asia	1932258-1			0 Weeks, 2 Days	10,368	1 - 10 - 100 - 1000 - 10000 -	Buy Now
Molex 1722581106 CONN RCPT HSG 6POS 3.50MM
Distributors	Part	Package	Stock	Lead Time	Min Order Qty	Price	Buy
DigiKey	1722581106	Bag	2,530		1	1 $0.36 10 $0.289 100 $0.2359 1000 $0.19227 10000 $0.17726	Buy Now
TTI	1722581106	Bulk	26,282		23	1 - 10 - 100 $0.221 1000 $0.221 10000 $0.221	Buy Now
Molex 1722581108 CONN RCPT HSG 8POS 3.50MM
Distributors	Part	Package	Stock	Lead Time	Min Order Qty	Price	Buy
DigiKey	1722581108	Bag	2,399		1	1 $0.44 10 $0.356 100 $0.2897 1000 $0.23614 10000 $0.23614	Buy Now
TTI	1722581108	Bulk			19	1 - 10 - 100 $0.277 1000 $0.277 10000 $0.277	Buy Now
Avnet Abacus	1722581108			143 Weeks	1	1 - 10 - 100 - 1000 - 10000 -	Buy Now
	1722581108				2,500	1 - 10 - 100 - 1000 - 10000 -	Buy Now
RAF Electronic Hardware 2258-1032-AL-7 3/8 HEX X 1-3/4 LENGTH
Distributors	Part	Package	Stock	Lead Time	Min Order Qty	Price	Buy
DigiKey	2258-1032-AL-7	Bulk	162		1	1 $3.15 10 $3.15 100 $2.0579 1000 $1.75574 10000 $1.75574	Buy Now
Mouser Electronics	2258-1032-AL-7					1 $3.25 10 $3.25 100 $3.25 1000 $3.25 10000 $3.25	Get Quote
Onlinecomponents.com	2258-1032-AL-7					1 - 10 $3.1 100 $3.1 1000 $2.21 10000 $2.06	Buy Now

Find more 22581 price and stock on Findchips.com

22581 Datasheets (24)

Part	Manufacturer	Description	Datasheet Type	PDF
22581	Brady Worldwide	B401 7X10 BLK/YEL CAUTION	Original	PDF
2258-1032-AL	RAF Electronic Hardware	HEX STANDOFFPLAIN ALUMINUM3/8 HE	Original	PDF
2258-1032-AL-22	RAF Electronic Hardware	HEX STANDOFFCLEAR ANODIZE3/8 HEX	Original	PDF
2258-1032-AL-6	RAF Electronic Hardware	HEX STANDOFFGOLD IRIDITE3/8 HEX	Original	PDF
2258-1032-AL-7	RAF Electronic Hardware	3/8 HEX X 1-3/4 LENGTH	Original	PDF
2258-1032-B	RAF Electronic Hardware	HEX STANDOFFPLAIN BRASS3/8 HEX X	Original	PDF
2258-1032-B-12	RAF Electronic Hardware	HEX STANDOFFCLEAR ZINC3/8 HEX X	Original	PDF
2258-1032-N	RAF Electronic Hardware	HEX STANDOFFNO FINISH - NYLON3/8	Original	PDF
2258-1032-S	RAF Electronic Hardware	HEX STANDOFFPLAIN STEEL3/8 HEX X	Original	PDF
2258-1032-S-12	RAF Electronic Hardware	HEX STANDOFFCLEAR ZINC3/8 HEX X	Original	PDF
2258-1032-S-28	RAF Electronic Hardware	HEX STANDOFFZINC YELLOW3/8 HEX X	Original	PDF
2258-1032-SS	RAF Electronic Hardware	HEX STANDOFFPLAIN STAINLESS STEE	Original	PDF
2258-1032-SS-20	RAF Electronic Hardware	HEX STANDOFFPASSIVATE3/8 HEX X 1	Original	PDF
2258-1224-AL	RAF Electronic Hardware	HEX STANDOFFPLAIN ALUMINUM3/8 HE	Original	PDF

2258-1224-B	RAF Electronic Hardware	HEX STANDOFFPLAIN BRASS3/8 HEX X	Original	PDF
2258-1224-N	RAF Electronic Hardware	HEX STANDOFFNO FINISH - NYLON3/8	Original	PDF
2258-1224-S	RAF Electronic Hardware	HEX STANDOFFPLAIN STEEL3/8 HEX X	Original	PDF
2258-1224-SS	RAF Electronic Hardware	HEX STANDOFFPLAIN STAINLESS STEE	Original	PDF
2258/1 SL001	Alpha Wire	Cables, Wires - Single Conductor Cables (Hook-Up Wire) - CBL 1COND STRND 18AWG SLAT 1000"	Original	PDF
2258/1-SL001	Alpha Wire	Single Conductor Cables (Hook Up Wire), Cables, Wires, CBL 1COND 18AWG 300V SLATE 1000'	Original	PDF

22581 Datasheets Context Search

Catalog Datasheet	MFG & Type	PDF	Document Tags
two Tone generator Abstract: ac voltage stabilizer circuit diagram chip for generating 10 Mhz sine wave CMOS Data Book stabiliser circuit diagram LTC2256C LTC2256I LTC2257C LTC2257I LTC2258-12 Text: Electrical Specifications Subject to Change LTC2258-12 LTC2257-12/LTC2256-12 12-Bit, 65/40/2 5Msps Ultralow Power 1.8V ADCs FEATURES DESCRIPTION n The LTC 2258-12/LTC2257-12/LTC2256-12 are sampling 12-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect	Original	PDF	LTC2258-12 LTC2257-12/LTC2256-12 12-Bit, 2258-12/LTC2257-12/LTC2256-12 12-bit 17psRMS 79mW/47mW/34mW 28dBm 900MHz, LTC6400-20 two Tone generator ac voltage stabilizer circuit diagram chip for generating 10 Mhz sine wave CMOS Data Book stabiliser circuit diagram LTC2256C LTC2256I LTC2257C LTC2257I LTC2258-12
d12n marking Abstract: d13n3 lt 8202 mark d13n two Tone generator LTC2256C LTC2256I LTC2257C LTC2257I LTC2258-14 Text: Electrical Specifications Subject to Change LTC2258-14 LTC2257-14/LTC2256-14 14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs FEATURES DESCRIPTION n The LTC 2258-14/LTC2257-14/LTC2256-14 are sampling 14-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect	Original	PDF	LTC2258-14 LTC2257-14/LTC2256-14 14-Bit, 65/40/25Msps 2258-14/LTC2257-14/LTC2256-14 14-bit 17psRMS 81mW/49mW/35mW 28dBm 900MHz, d12n marking d13n3 lt 8202 mark d13n two Tone generator LTC2256C LTC2256I LTC2257C LTC2257I LTC2258-14
epcos 565-2 Abstract: B57540G0103F000 B57540G0104F000 565-2 EPCOS EPCOS B25 160 131850 263640 EPCOS b57540 B57540G0502F000 10311 Text: NTC thermistors for temperature measurement Glass-encapsulated sensors, standard type Series/Type: Date: B57540 March 2006 EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited.	Original	PDF	B57540 epcos 565-2 B57540G0103F000 B57540G0104F000 565-2 EPCOS EPCOS B25 160 131850 263640 EPCOS b57540 B57540G0502F000 10311
B57550G0103F000 Abstract: 13844 B57550G0104H000 B57550G0202G000 B57550G0202F000 263640 33260 B57550 B57550G0103J000 533390 Text: NTC thermistors for temperature measurement Glass-encapsulated sensors, standard type Series/Type: Date: B57550 March 2006 EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited.	Original	PDF	B57550 B57550G0103F000 13844 B57550G0104H000 B57550G0202G000 B57550G0202F000 263640 33260 B57550 B57550G0103J000 533390
Untitled Abstract: No abstract text available Text: U S E R I N T E R F A C E S O L U T I O N S P R O D U C T 15型LCD対応 I N F O R M A T I O N No.- 光学式タッチパネル UP-JAB9 Series 0089A 発行 2010.3 UP-JAB9 Seriesは15型LCDに対応した光学式タッチパネルです。X-Y各軸上に対向する発光素子と受光素子とを置き、その	Original	PDF
STK411-230E Abstract: STK411-220E stk442-130 UPC2581V PAL005A FN1016 STRG6153 RSN313H25 STK407-070B MCZ3001D Text: R Serving The Electronic Industry Since 1982 Ordering at Dalbani is so easy Go to : www.dalbani.com Search & check stock Busque y revise nuestro inventario A Search Enter your Item number and click GO Entre el numero del producto y haga clicsobre GO The system will take you straight to the Item that you are looking for	Original	PDF	STVDST-01 CAT22 STK411-230E STK411-220E stk442-130 UPC2581V PAL005A FN1016 STRG6153 RSN313H25 STK407-070B MCZ3001D
Untitled Abstract: No abstract text available Text: LTC2258-14 LTC2257-14/LTC2256-14 14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs Features Description 74dB SNR n 88dB SFDR n Low Power: 81mW/49mW/35mW n Single 1.8V Supply n CMOS, DDR CMOS or DDR LVDS Outputs n Selectable Input Ranges: 1V P-P to 2VP-P n 800MHz Full-Power Bandwidth S/H	Original	PDF	LTC2258-14 LTC2257-14/LTC2256-14 14-Bit, 65/40/25Msps 81mW/49mW/35mW 800MHz 14-Bit 12-Bit 40-Pin 2258-14/LTC2257-14/LTC2256-14
cms 702 Abstract: foster 81 - 22 Zeus Industrial Products B1130 BA 6686 Taiwan Oasis Enterprise Co., LTD Text: HARRIS SEMICONDUCTOR Sales Offices, Representatives and Authorized Distributors North American Sales Offices, Representatives and Authorized Distributors ALABAMA Harris Semiconductor 600 Boulevard South Suite 103 Huntsville, AL 35802 TEL: 205 883-2791 FAX: 205 883 2861	Original	PDF	52-HI-REL cms 702 foster 81 - 22 Zeus Industrial Products B1130 BA 6686 Taiwan Oasis Enterprise Co., LTD
Moeller IZM 32 Abstract: moeller IZMB2-V2500 IZMN2-V2500 IZMB2-A2500 IZMH3-U4000 IZMB2-A2000 moeller circuit breaker IZM SIEMENS circuit breakers vde 0660 1250 A IZMB2-V2000 NZM10 Text: Building Automation Industrial Automation tra Combinations Catalogue Supplement Open Circuit-Breakers from 630 A to 6300 A Valid from May 2001 Bildgrösse 210 x 118,5 mm 222 Logo 17 x 17 mm Think future. Switch to green. Systems Moeller NK1230-1045GB Description	Original	PDF	NK1230-1045GB Moeller IZM 32 moeller IZMB2-V2500 IZMN2-V2500 IZMB2-A2500 IZMH3-U4000 IZMB2-A2000 moeller circuit breaker IZM SIEMENS circuit breakers vde 0660 1250 A IZMB2-V2000 NZM10
Untitled Abstract: No abstract text available Text: LTC2258-14 LTC2257-14/LTC2256-14 14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs FEATURES n n n n n n n n n n n n n DESCRIPTION The LTC 2258-14/LTC2257-14/LTC2256-14 are sampling 14-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect	Original	PDF	LTC2258-14 LTC2257-14/LTC2256-14 14-Bit, 65/40/25Msps 2258-14/LTC2257-14/LTC2256-14 14-bit 17psRMS 81mW/49mW/35mW 800MHz 28dBm
pic16f877a projects PIR SENSOR Abstract: Parallax Futaba Standard Servo PIC16F877A Microcontroller 6495 Photoresistor Light Sensor Photoresistor uv PIC with bluetooth diode LT 7229 pic16f877a interfacing xbee PIC16F877A lcd keypad interfacing PIC32 uart example rs232 Text: Embedded Solutions Wireless Solutions Laird Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4, 5, 6 Antenova. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7	Original	PDF	RN1600 RS-232-to-USB OP6800 512K/512K, OP6810, pic16f877a projects PIR SENSOR Parallax Futaba Standard Servo PIC16F877A Microcontroller 6495 Photoresistor Light Sensor Photoresistor uv PIC with bluetooth diode LT 7229 pic16f877a interfacing xbee PIC16F877A lcd keypad interfacing PIC32 uart example rs232
LTC2256C Abstract: LTC2256I LTC2257C LTC2257I LTC2258-12 LTC2258C LTC2258I Text: LTC2258-12 LTC2257-12/LTC2256-12 12-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs FEATURES DESCRIPTION n The LTC 2258-12/LTC2257-12/LTC2256-12 are sampling 12-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect	Original	PDF	LTC2258-12 LTC2257-12/LTC2256-12 12-Bit, 65/40/25Msps 2258-12/LTC2257-12/LTC2256-12 12-bit 17psRMS 79mW/47mW/34mW 800MHz 28dBm LTC2256C LTC2256I LTC2257C LTC2257I LTC2258-12 LTC2258C LTC2258I
powerpc 405 Abstract: CHN 628 marking code H5C SMD Transistor mac 7a8 transistor PowerISA 203 Text: MPC5744P Reference Manual Document Number: MPC5744PRM Rev. 2, 06/2013 Preliminary MPC5744P Reference Manual, Rev. 2, 06/2013 2 Preliminary Freescale Semiconductor, Inc. Contents Section number Title Page Chapter 1 Preface 1.1	Original	PDF	MPC5744P MPC5744PRM powerpc 405 CHN 628 marking code H5C SMD Transistor mac 7a8 transistor PowerISA 203
alpine 3555 Abstract: Newport Components 1013 clare 852 unitronics JI 3009-2 1131L gentech A320 54711 74146 Text: You are in the Sales Info File • Click for Main Menu Product Categories CLICK ANY ITEM Return to Main Menu PC Card Power Protected Switches Low-Dropout Linear Voltage Regulators Switch-Mode Voltage Regulators Voltage References Switched-Capacitor Voltage Converters	Original	PDF

JESD204 Abstract: No abstract text available Text: Lowest Noise 16-Bit 20Msps ADCs 85 84 LTC2270 Dual d ferre S e R t Inpu e 46µV RM Nois LTC2269 SNR dBFS Single 16-Bit 20Msps Single-Ended Encode 83 Differential Encode 82 81 80 LTC2271 79 20 40 60 80 100 120 140 Input Frequency (MHz) Flexible Digital Outputs	Original	PDF	16-Bit 20Msps LTC2269 LTC2270 LTC2271 16-Bit, 2269/LTC2270: JESD204
Untitled Abstract: No abstract text available Text: www.telegaertner.com 33 1,65 g 12,4 9,7 14 1,5 Fax: +49 7157/125-120 Phone: +49 7157/125-0 2,2 b max. 5 3/8-32 UNEF 23,4 g c e d hex 13 SW 13 Alle Rechte vorbehalten / all rights reserved Telegärtner K.Gärtner GmbH D-71144 Steinenbronn Lerchenstrasse 35	Original	PDF	D-71144 J01001A0614
Untitled Abstract: No abstract text available Text: www.telegaertner.com 33 1,65 g 12,4 e e 9,7 Phone: +49 7157/125-0 14 a 1,3 max. 5 0,8 Fax: +49 7157/125-120 8,4 3/8-32 UNEF 23,4 g c d Alle Rechte vorbehalten / all rights reserved Telegärtner K.Gärtner GmbH D-71144 Steinenbronn Lerchenstrasse 35 Germany	Original	PDF	D-71144 J01003A1221
hp laptop MOTHERBOARD pcb CIRCUIT diagram Abstract: AS Eltek smps 250 hp laptop battery pinout LM317 power supply 0.30 V. 20 amp LD33 VOLTAGE REGULATOR 2675M ld33 linear LA36 diode HP 4220 laptop ac adapter schematics diagram hp mini laptop MOTHERBOARD pcb CIRCUIT diagram Text: Back Micrel’s Guide to Designing With Low-Dropout Voltage Regulators Bob Wolbert Applications Engineering Manager Revised Edition, December 1998 Table of Contents Index Micrel Semiconductor 1849 Fortune Drive San Jose, CA 95131 Phone: + 1 408 944-0800	Original	PDF
motorola 68hc705 programming guide Abstract: 68HC12 microcontroller electronic stethoscope circuit diagram HMI-200 Telefunken supertap emulator 68302 installation guide M68HC11-F mc68hc11evb tag 8944 semiconductors cross index Text: 1999 MOTOROLA MICROCONTROLLER DEVELOPMENT TOOLS DIRECTORY Design Support for the M68HCO5, M68HCO8, M68HC11, M68HC12, M68HC16, M68300, and MPC500 Families 1999 Edition 1999 Motorola, Inc All Rights Reserved Table of Contents MOTOROLA Table of Contents Development Tools Index by	Original	PDF	M68HCO5, M68HCO8, M68HC11, M68HC12, M68HC16, M68300, MPC500 M68HC11 M68HC05 motorola 68hc705 programming guide 68HC12 microcontroller electronic stethoscope circuit diagram HMI-200 Telefunken supertap emulator 68302 installation guide M68HC11-F mc68hc11evb tag 8944 semiconductors cross index
Untitled Abstract: No abstract text available Text: U.S. Distributors DIE DISTRIBUTION Chip Supply, Inc. 7725 Orange Blossom Trail Orlando, FL 32810 Tel: 407 298-7100 Fax: (407) 290-0164 PACKAGED DEVICES ALABAMA Bell Industries Suite 140 8215 Hwy. 20 West Madison, AL 35758 EBV Electronics Suite 16 4835 University Square	Original	PDF	950-2rt 747-NUHO
JB 2256 Abstract: 6543H pt 2258 CQ 4.000 crystal oscillator 4Mhz LC6543H fatar lc6543c 34-TNC 1b655 6546H Text: Ordering number: EN2258E no.2258E sAimo I F I L C 6 5 4 3 C ,6 5 4 3 H ,6 5 4 6 C ,6 5 4 6 H CMOS LSI SINGLE-CHIP 4-BIT MICROCOMUPTER FOR SM ALL-SCALE CONTRQL-ORtENTED APPLICATIONS -# The LC6543C/H, LC6546C/H belong to our single-chip 4-bit microcomputer LpqgOO s^ip^iabnrai&d usjji^ÉMOS	OCR Scan	PDF	EN2258E 2258E rLC6543C 6543H 6546C 6546H LC6543C/H, LC6546C/H 00naumad. JB 2256 pt 2258 CQ 4.000 crystal oscillator 4Mhz LC6543H fatar lc6543c 34-TNC 1b655 6546H
EATON CM20A Abstract: A5 GNE mosfet Hall sensor 44e 402 2N8491 FTG 1087 S TRIAC BCR 10km FEB3T smd transistor marking 352a sharp EIA 577 sharp color tv schematic diagram MP-130 M mh-ce 10268 Text: Table of Contents N E W A R K E L E C T R O N IC S “Where serving you begins even before you call” Newark Electronics is a UNIQUE broadline distributor of electronic components, dedicated to provid ing complete service, fast delivery and in-depth inventory. Our main	OCR Scan	PDF
STR W 6262 Abstract: ortec 467 STR 6262 STR M 6545 NE402 Highland Electronics 225813 AXP 223 359-24 Text: EO OPTOELECTRONICS AUTHORIZED REPRESENTATIVES AND DISTRIBUTORS North Am erican Technical Representatives ALABAMA R.O. W hitesell Huntsville Fax 205 883-5110 (205) 882-9626 GEORGIA MICHIGAN R.O. W hitesell Norcross (770) 449-9190 Fax: (770) 449-9197 R.O. W hitesell	OCR Scan	PDF
80287 microprocessor block diagram and pin diagram Abstract: No abstract text available Text: irrtel' MILITARY 387 SX MATH COPROCESSOR Military • Interfaces with Military 3 8 6 tm SX Microprocessor ■ Expands Military 386 SX CPU Data Types to Include 32-, 64-, 80-Bit Floating Point, 32-, 64-Bit Integers and 18-Digit BCD Operands ■ High Performance 80-Bit Internal	OCR Scan	PDF	80-Bit 64-Bit 18-Digit 80-Bit M8087/M80287 M8087 M80287. M80287 ASM86 80287 microprocessor block diagram and pin diagram

Privacy Settings

22581 Search Results

22581 Price and Stock

Molex 1722581104

TE Connectivity 1932258-1

Molex 1722581106

Molex 1722581108

RAF Electronic Hardware 2258-1032-AL-7

22581 Datasheets (24)

22581 Datasheets Context Search

two Tone generator

d12n marking

epcos 565-2

B57550G0103F000

Untitled

STK411-230E

Untitled

cms 702

Moeller IZM 32

Untitled

pic16f877a projects PIR SENSOR

LTC2256C

powerpc 405

alpine 3555

JESD204

Untitled

Untitled

hp laptop MOTHERBOARD pcb CIRCUIT diagram

motorola 68hc705 programming guide

Untitled

JB 2256

EATON CM20A

STR W 6262

80287 microprocessor block diagram and pin diagram