An HP-48 RAM Card |
| Description: | Contains the schematics and Gerber files needed to create a 128 KB RAM card for the 48SX/GX calculators. Data sheets for the parts used are also included. The Bill of Material calls out specific vendor and vendor part numbers for the passive components used, but any equivalent part in the SMD 0805 package can be substituted. Battery backup is by use of a 12 mm lithium coin cell, either the CR1216 or the CR1225. The CR1225 has the higher capacity rating of the two at 48 mAh. Although that's only half the capacity of a CR2016, the Cypress MoBL SRAM memory device only requires 1 uA in standby mode when the memory is not selected so battery life should be reasonably long. |
| Filename: | hp48ramcard.zip |
| ID: | 9039 |
| Current version: | 1.0 |
| Author: | Mark A. Fleming |
| Downloaded file size: | 2,163,084 bytes |
| Platforms: | 48 |
| User rating: | Not yet rated (you must be logged in to vote) |
| Primary category: | Docs/Misc |
| Languages: | ENG |
| File date: | 2019-06-26 22:03:12 |
| Creation date: | 2019-06-26 |
| Source code: | Not included |
| Download count: | 741 |
| Version history: | 2019-07-20: Added to site
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| Archive contents: | Length Date Time Name
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426773 2019-06-26 15:41 HP48RamCard-master/An HP48 RAM Card.pdf
0 2019-06-26 15:41 HP48RamCard-master/Board/
0 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/
777 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.dri
5352 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GBL
1184 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GBO
1755 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GBS
95 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GML
883 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.gpi
6343 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GTL
10999 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GTO
1334 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GTP
2578 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.GTS
564 2019-06-26 15:41 HP48RamCard-master/Board/Gerber/RAM128Kfull-soic.TXT
13303 2019-06-26 15:41 HP48RamCard-master/Board/PCB Bottom.png
14160 2019-06-26 15:41 HP48RamCard-master/Board/PCB Top.png
13799 2019-06-26 15:41 HP48RamCard-master/Board/RAM128Kfull-soic Board.pdf
18938 2019-06-26 15:41 HP48RamCard-master/Board/RAM128Kfull-soic Schematic.pdf
281097 2019-06-26 15:41 HP48RamCard-master/Card front and back.jpg
0 2019-06-26 15:41 HP48RamCard-master/Datasheets/
556858 2019-06-26 15:41 HP48RamCard-master/Datasheets/001-44517_AN44517_Design_Recommendation_for_Battery-Backed_SRAMs_Using_Cypress_MoBL_SRAMs (1).pdf
47023 2019-06-26 15:41 HP48RamCard-master/Datasheets/Apem_12102018_MA_Series_.pdf
77897 2019-06-26 15:41 HP48RamCard-master/Datasheets/BAT-HLD-012-SMT Diagram-1175215.pdf
822506 2019-06-26 15:41 HP48RamCard-master/Datasheets/Cypress 128Kx8 SRAM 38-05485_CY62128E_MoBL_sup_sup_1-Mbit_128_K_8_Stat-479276.pdf
1299 2019-06-26 15:41 HP48RamCard-master/LICENSE.md
6086 2019-06-26 15:41 HP48RamCard-master/README.md
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2311603 26 files |
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