{"product_id":"puce-fram-fm1808-fm18w08-fm16w08","title":"28-pin FRAM memory chip FM1808, FM18W08 or FM16W08 — battery-free","description":"\u003ch2 style=\"color:#111213;font-size:1.6em;\"\u003e28-pin FRAM memory chip: the save that survives a dead battery\u003c\/h2\u003e\n\u003cp\u003eOn an arcade board or a retro project, saved data depends on a lithium battery soldered in thirty years ago. The day it gives out, settings, high scores and configuration go with it. \u003cstrong style=\"color:#0097ac;\"\u003eFRAM\u003c\/strong\u003e is non-volatile memory that retains data \u003cstrong style=\"color:#0097ac;\"\u003ewithout a battery\u003c\/strong\u003e and is written at SRAM speed: it is the component fitted in place of the original memory in so-called \u003cstrong style=\"color:#0097ac;\"\u003ebattery-less\u003c\/strong\u003e mods.\u003c\/p\u003e\n\u003ch3 style=\"color:#111213;font-size:1.35em;\"\u003eWhat it does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong style=\"color:#0097ac;\"\u003eRetains data without power\u003c\/strong\u003e: no lithium battery, no backup capacitor to keep an eye on, no save lost after months in storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color:#0097ac;\"\u003eWrites like an SRAM\u003c\/strong\u003e: immediate parallel access, with no write cycle or programming sequence as on an EEPROM or Flash, and with far higher write endurance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color:#0097ac;\"\u003eThree part numbers to choose from\u003c\/strong\u003e: FM1808-70 (5 V, 32 K × 8), FM18W08 (2.7 to 5.5 V, 32 K × 8), FM16W08 (2.7 to 5.5 V, 64 K × 8). Order the one your board expects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color:#111213;font-size:1.35em;\"\u003eWhat it doesn't do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIt is not a bypass chip: it is a standard memory component, with no embedded software and no unlocking function.\u003c\/li\u003e\n\u003cli\u003eIt cannot be fitted without soldering: a 28-pin surface-mount component, supplied bare, with no socket or adapter board.\u003c\/li\u003e\n\u003cli\u003eIt does not recover a save that has already been lost: after replacement, the board restarts with blank memory that must be reconfigured.\u003c\/li\u003e\n\u003cli\u003eThe supplier states an SSOP-28 package while the original listing says SOP-28: the exact package width remains \u003cstrong\u003eto be confirmed\u003c\/strong\u003e, so compare your board's footprint before ordering.\u003c\/li\u003e\n\u003cli\u003eThe manufacturer and markings are not guaranteed: component of Chinese origin, sold without a certificate of authenticity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color:#111213;font-size:1.35em;\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eIntended for boards that use a battery-backed 28-pin parallel memory: arcade boards, retro computing builds, DIY projects. Compatibility is checked against your board's schematic, with the pinout and supply voltage to hand. \u003cstrong style=\"color:#0097ac;\"\u003eDoes not replace\u003c\/strong\u003e an I²C or SPI serial memory, a program EPROM or Flash, or a through-hole DIP-28 package: the format sold here is a surface-mount package.\u003c\/p\u003e\n\u003ch3 style=\"color:#111213;font-size:1.35em;\"\u003eSkill level required\u003c\/h3\u003e\n\u003cp\u003eExperienced. You need to desolder the original chip and fit the new one: hot air station or fine-tip iron, flux, desoldering braid, isopropyl alcohol and an anti-static wrist strap. A magnifier or stereo microscope helps a lot with a 28-pin pitch. If you have never done SMD work, practise on a scrap board before touching yours.\u003c\/p\u003e\n\u003ch3 style=\"color:#111213;font-size:1.35em;\"\u003eIn the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 28-pin FRAM memory chip, in the selected part number (FM1808-70-SG, FM18W08-SG or FM16W08-SG).\u003c\/li\u003e\n\u003cli\u003eSold individually: no socket, cable or printed documentation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top:16px;\"\u003eListing verified on 19 August 2026. Delivery in 10 to 18 days · ships within 3 to 5 days · 2-year legal guarantee · 14-day returns.\u003c\/p\u003e\n\u003cp\u003eRead before ordering: \u003ca href=\"https:\/\/fun-esports.com\/en\/collections\/peripheriques-retro\" style=\"color:#0097ac;\"\u003eRetro peripherals\u003c\/a\u003e\u003c\/p\u003e","brand":"Fun-Esports","offers":[{"title":"FM16W08-SG","offer_id":54540493586765,"sku":"1005003784632135-FM16W08-SG","price":16.99,"currency_code":"EUR","in_stock":true},{"title":"FM18W08-SG","offer_id":54540493619533,"sku":"1005003784632135-FM18W08-SG","price":16.99,"currency_code":"EUR","in_stock":true},{"title":"FM1808-70-SG","offer_id":54540493652301,"sku":"1005003784632135-FM1808-70-SG","price":16.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7636\/5133\/files\/puce-memoire-fram-28-broches-fm1808-fm18w08-ou-fm16w08_036d35fc-50b7-4001-9e8c-b6c47952fbe7.png?v=1787315202","url":"https:\/\/fun-esports.de\/en\/products\/fram-chip-fm1808-fm18w08-fm16w08","provider":"Fun-Esports","version":"1.0","type":"link"}