{"product_id":"m81c55","title":"M81C55","description":"\u003cdiv class=\"communicaintro\"\u003e\u003cspan\u003eRAM I\/O Timer 40 Pin DIP\u003c\/span\u003e\u003c\/div\u003e\u003cdiv class=\"communicadesc\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cul data-start=\"43\" data-end=\"330\"\u003e\r\n\u003cli data-section-id=\"17wi5nk\" data-start=\"194\" data-end=\"235\"\u003eCompatible With: Intel 8155 \/ 81C55\u003c\/li\u003e\r\n\u003cli data-section-id=\"miot1t\" data-start=\"236\" data-end=\"299\"\u003eDevice Type: CMOS RAM, I\/O Port, and Timer Combination IC\u003c\/li\u003e\r\n\u003cli data-section-id=\"raj2lv\" data-start=\"300\" data-end=\"330\"\u003ePackage Type: 40-Pin DIP\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"332\" data-end=\"353\"\u003eGeneral Features\u003c\/h4\u003e\r\n\u003cul data-start=\"355\" data-end=\"601\"\u003e\r\n\u003cli data-section-id=\"oxglil\" data-start=\"355\" data-end=\"475\"\u003eCombines three functions in one IC:\r\n\u003cul data-start=\"395\" data-end=\"475\"\u003e\r\n\u003cli data-section-id=\"sk7l80\" data-start=\"395\" data-end=\"415\"\u003e256 × 8 Static RAM\u003c\/li\u003e\r\n\u003cli data-section-id=\"5ji1zj\" data-start=\"418\" data-end=\"445\"\u003e22 Programmable I\/O Lines\u003c\/li\u003e\r\n\u003cli data-section-id=\"aah5sb\" data-start=\"448\" data-end=\"475\"\u003e14-Bit Programmable Timer\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003cli data-section-id=\"qyit8u\" data-start=\"477\" data-end=\"500\"\u003eCMOS low-power design\u003c\/li\u003e\r\n\u003cli data-section-id=\"10bn1xv\" data-start=\"501\" data-end=\"567\"\u003eDirect interface to 8085, 8086, Z80, and similar microprocessors\u003c\/li\u003e\r\n\u003cli data-section-id=\"1ydoyrl\" data-start=\"568\" data-end=\"601\"\u003eSoftware programmable operation\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"603\" data-end=\"622\"\u003eMemory Section\u003c\/h4\u003e\r\n\u003cul data-start=\"624\" data-end=\"744\"\u003e\r\n\u003cli data-section-id=\"zhxfqo\" data-start=\"624\" data-end=\"653\"\u003eRAM Capacity: 256 Bytes\u003c\/li\u003e\r\n\u003cli data-section-id=\"w2na4b\" data-start=\"654\" data-end=\"686\"\u003eOrganization: 256 × 8 bits\u003c\/li\u003e\r\n\u003cli data-section-id=\"2zcrid\" data-start=\"687\" data-end=\"724\"\u003eStatic memory (no refresh required)\u003c\/li\u003e\r\n\u003cli data-section-id=\"yszuw9\" data-start=\"725\" data-end=\"744\"\u003eRead\/write memory\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"746\" data-end=\"760\"\u003eI\/O Ports\u003c\/h4\u003e\r\n\u003cul data-start=\"762\" data-end=\"787\"\u003e\r\n\u003cli data-section-id=\"1m9aahw\" data-start=\"762\" data-end=\"787\"\u003eTotal I\/O Lines: 22\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp data-start=\"789\" data-end=\"808\"\u003ePort configuration:\u003c\/p\u003e\r\n\u003cul data-start=\"810\" data-end=\"872\"\u003e\r\n\u003cli data-section-id=\"1xzbi9q\" data-start=\"810\" data-end=\"830\"\u003ePort A: 8 bits\u003c\/li\u003e\r\n\u003cli data-section-id=\"jb3i65\" data-start=\"831\" data-end=\"851\"\u003ePort B: 8 bits\u003c\/li\u003e\r\n\u003cli data-section-id=\"fk6ovm\" data-start=\"852\" data-end=\"872\"\u003ePort C: 6 bits\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp data-start=\"874\" data-end=\"883\"\u003eFeatures:\u003c\/p\u003e\r\n\u003cul data-start=\"885\" data-end=\"966\"\u003e\r\n\u003cli data-section-id=\"8sqy3h\" data-start=\"885\" data-end=\"912\"\u003eProgrammable input\/output\u003c\/li\u003e\r\n\u003cli data-section-id=\"19qw9wi\" data-start=\"913\" data-end=\"937\"\u003eTTL-compatible signals\u003c\/li\u003e\r\n\u003cli data-section-id=\"1f059y4\" data-start=\"938\" data-end=\"966\"\u003eBit-programmable operation\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"968\" data-end=\"986\"\u003eTimer Section\u003c\/h4\u003e\r\n\u003cul data-start=\"988\" data-end=\"1122\"\u003e\r\n\u003cli data-section-id=\"1svl3ga\" data-start=\"988\" data-end=\"1014\"\u003eTimer Width: 14 bits\u003c\/li\u003e\r\n\u003cli data-section-id=\"oo52qr\" data-start=\"1015\" data-end=\"1044\"\u003eProgrammable interval timer\u003c\/li\u003e\r\n\u003cli data-section-id=\"1k2s5ng\" data-start=\"1045\" data-end=\"1088\"\u003eOne-shot and periodic timing applications\u003c\/li\u003e\r\n\u003cli data-section-id=\"1cbbj3t\" data-start=\"1089\" data-end=\"1122\"\u003eInterrupt generation capability\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"1124\" data-end=\"1155\"\u003eElectrical Characteristics\u003c\/h4\u003e\r\n\u003cul data-start=\"1157\" data-end=\"1278\"\u003e\r\n\u003cli data-section-id=\"danr1i\" data-start=\"1157\" data-end=\"1214\"\u003eSupply Voltage:\r\n\u003cul data-start=\"1181\" data-end=\"1214\"\u003e\r\n\u003cli data-section-id=\"h96ixe\" data-start=\"1181\" data-end=\"1197\"\u003e4.5 V to 5.5 V\u003c\/li\u003e\r\n\u003cli data-section-id=\"fjlehj\" data-start=\"1200\" data-end=\"1214\"\u003eNominal: 5 V\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003cli data-section-id=\"ap0xvt\" data-start=\"1216\" data-end=\"1242\"\u003eCMOS low-power operation\u003c\/li\u003e\r\n\u003cli data-section-id=\"3jkr4d\" data-start=\"1243\" data-end=\"1278\"\u003eTTL-compatible inputs and outputs\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"1280\" data-end=\"1298\"\u003eCPU Interface\u003c\/h4\u003e\r\n\u003cul data-start=\"1300\" data-end=\"1389\"\u003e\r\n\u003cli data-section-id=\"hr8es6\" data-start=\"1300\" data-end=\"1316\"\u003e8-bit data bus\u003c\/li\u003e\r\n\u003cli data-section-id=\"1rzn67z\" data-start=\"1317\" data-end=\"1340\"\u003eAddress bus interface\u003c\/li\u003e\r\n\u003cli data-section-id=\"1irmvnm\" data-start=\"1341\" data-end=\"1369\"\u003eRead\/Write control signals\u003c\/li\u003e\r\n\u003cli data-section-id=\"3iowtg\" data-start=\"1370\" data-end=\"1389\"\u003eChip Select input\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp data-start=\"1391\" data-end=\"1407\"\u003eCompatible with:\u003c\/p\u003e\r\n\u003cul data-start=\"1409\" data-end=\"1446\"\u003e\r\n\u003cli data-section-id=\"1tqq7nb\" data-start=\"1409\" data-end=\"1421\"\u003eIntel 8085\u003c\/li\u003e\r\n\u003cli data-section-id=\"1tqq7n8\" data-start=\"1422\" data-end=\"1434\"\u003eIntel 8086\u003c\/li\u003e\r\n\u003cli data-section-id=\"12eez7x\" data-start=\"1435\" data-end=\"1446\"\u003eZilog Z80\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"1448\" data-end=\"1460\"\u003ePackage\u003c\/h4\u003e\r\n\u003cul data-start=\"1462\" data-end=\"1546\"\u003e\r\n\u003cli data-section-id=\"xksi7x\" data-start=\"1462\" data-end=\"1486\"\u003ePackage Type: PDIP\u003c\/li\u003e\r\n\u003cli data-section-id=\"152isau\" data-start=\"1487\" data-end=\"1511\"\u003ePin Count: 40 Pins\u003c\/li\u003e\r\n\u003cli data-section-id=\"1oaq2s0\" data-start=\"1512\" data-end=\"1546\"\u003eMounting Style: Through-Hole\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"1548\" data-end=\"1574\"\u003eOperating Temperature\u003c\/h4\u003e\r\n\u003cul data-start=\"1576\" data-end=\"1615\"\u003e\r\n\u003cli data-section-id=\"g1rp9j\" data-start=\"1576\" data-end=\"1615\"\u003eCommercial versions:\r\n\u003cul data-start=\"1601\" data-end=\"1615\"\u003e\r\n\u003cli data-section-id=\"xldei7\" data-start=\"1601\" data-end=\"1615\"\u003e0°C to +70°C\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"1617\" data-end=\"1634\"\u003eKey Features\u003c\/h4\u003e\r\n\u003cul data-start=\"1636\" data-end=\"1817\"\u003e\r\n\u003cli data-section-id=\"1x8kpsj\" data-start=\"1636\" data-end=\"1651\"\u003e256-byte SRAM\u003c\/li\u003e\r\n\u003cli data-section-id=\"18blehb\" data-start=\"1652\" data-end=\"1679\"\u003e22 programmable I\/O lines\u003c\/li\u003e\r\n\u003cli data-section-id=\"zhgxg8\" data-start=\"1680\" data-end=\"1694\"\u003e14-bit timer\u003c\/li\u003e\r\n\u003cli data-section-id=\"16n60go\" data-start=\"1695\" data-end=\"1728\"\u003eSingle-chip peripheral solution\u003c\/li\u003e\r\n\u003cli data-section-id=\"1nep6s7\" data-start=\"1729\" data-end=\"1756\"\u003eLow power CMOS technology\u003c\/li\u003e\r\n\u003cli data-section-id=\"g76ggy\" data-start=\"1757\" data-end=\"1784\"\u003eMicroprocessor compatible\u003c\/li\u003e\r\n\u003cli data-section-id=\"14wt99u\" data-start=\"1785\" data-end=\"1817\"\u003eReduces system component count\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"1819\" data-end=\"1844\"\u003eTypical Applications\u003c\/h4\u003e\r\n\u003cul data-start=\"1846\" data-end=\"2053\"\u003e\r\n\u003cli data-section-id=\"1xg4ucg\" data-start=\"1846\" data-end=\"1870\"\u003eIndustrial controllers\u003c\/li\u003e\r\n\u003cli data-section-id=\"4dm4gg\" data-start=\"1871\" data-end=\"1889\"\u003eEmbedded systems\u003c\/li\u003e\r\n\u003cli data-section-id=\"172mapn\" data-start=\"1890\" data-end=\"1918\"\u003eData acquisition equipment\u003c\/li\u003e\r\n\u003cli data-section-id=\"1danmd\" data-start=\"1919\" data-end=\"1947\"\u003eTelecommunications systems\u003c\/li\u003e\r\n\u003cli data-section-id=\"ctvt14\" data-start=\"1948\" data-end=\"1966\"\u003eTest instruments\u003c\/li\u003e\r\n\u003cli data-section-id=\"1o5ymvl\" data-start=\"1967\" data-end=\"1991\"\u003eSingle-board computers\u003c\/li\u003e\r\n\u003cli data-section-id=\"1phhv9u\" data-start=\"1992\" data-end=\"2025\"\u003eMicroprocessor training systems\u003c\/li\u003e\r\n\u003cli data-section-id=\"j3900e\" data-start=\"2026\" data-end=\"2053\"\u003eProcess control equipment\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch4 data-start=\"2055\" data-end=\"2077\"\u003eFunctional Blocks\u003c\/h4\u003e\r\n\u003cul data-start=\"2079\" data-end=\"2211\"\u003e\r\n\u003cli data-section-id=\"x2nbzi\" data-start=\"2079\" data-end=\"2091\"\u003eStatic RAM\u003c\/li\u003e\r\n\u003cli data-section-id=\"ai329e\" data-start=\"2092\" data-end=\"2112\"\u003eI\/O Port A (8-bit)\u003c\/li\u003e\r\n\u003cli data-section-id=\"1vxty9d\" data-start=\"2113\" data-end=\"2133\"\u003eI\/O Port B (8-bit)\u003c\/li\u003e\r\n\u003cli data-section-id=\"b31tq\" data-start=\"2134\" data-end=\"2154\"\u003eI\/O Port C (6-bit)\u003c\/li\u003e\r\n\u003cli data-section-id=\"1087nnc\" data-start=\"2155\" data-end=\"2169\"\u003e14-bit Timer\u003c\/li\u003e\r\n\u003cli data-section-id=\"1voxwav\" data-start=\"2170\" data-end=\"2191\"\u003eBus Interface Logic\u003c\/li\u003e\r\n\u003cli data-section-id=\"lc6l1x\" data-start=\"2192\" data-end=\"2211\"\u003eControl Registers\u003c\/li\u003e\r\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003eAdditional Information\u003c\/h2\u003e\n\u003cdiv\u003e\u003ctable border=\"1\" cellpadding=\"7\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eDevice\u003c\/td\u003e\n\u003ctd\u003eIC\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Communica","offers":[{"title":"Default Title","offer_id":53347105636652,"sku":"M81C55","price":55.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0075\/8228\/5897\/files\/79d1115288bc52ecc98b1047b9c8913d.jpg?v=1781824320","url":"https:\/\/www.communica.co.za\/products\/m81c55","provider":"Communica South Africa","version":"1.0","type":"link"}