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1488 Driver and 1489 Receiver data sheet (380k)
The 1488 quadruple line driver and the 1489 quadruple line receiver together can make up a TTL to RS-232 transceiver. The require a dual power supply of +12 Volts and -12 Volts. These two devices are quite obsolete today. A single IC with a single power source can provide full TTL to RS-232 capabilities such as the MAX232 are in wide use today as a suitable replacement for the 1488 and 1489. These new little wonders keep the cost down due to the minimal parts needed and single 5 Volt source. The Motorola data sheet for the MC1488 and MC1489 are here for those who want to do the AEA CP-1 RS-232 bulletin. There are 9 pages of data sheets for each IC and are in .PDF.
XR2206 Data Sheet
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XR2206 Radio Shack data sheet (412k) Visit
EXAR's XR2206 company pageThere are four pages to the XR-2206, tone generator, data sheet in .PDF format. These data sheets come from Radio Shack. The sheets originally looked horrible, lots of black every where covering up valuable information of course. After about two plus hours, they now look decent. The data sheets are in .PDF format. Both of these data sheets are very old (1980's). I have the old Radio Shack data sheets as they seem to be more helpful for hobbyists over the manufacturer's data sheets. For the latest go to www.exar.com and search "XR2206" as the new datasheets are much improved. For information on how to design a modem for Amateur Radio use using the XR2206 and XR2211, see the XR modem page.
XR2211 Data Sheet
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the XR2211 Radio Shack data sheet (660k) Visit
EXAR's XR2211 company pageThere two sets of data sheets for this IC. One set of sheets is from EXAR (two pages-OUTDATED) and the other set is from Radio Shack (four pages). The sheets from Radio Shack seem to be more helpful Amateur Radio wise. As I mentioned with the XR2206 data sheet, the XR-2211 data sheets were in poor shape also. Again, lots of black every where covering up important information. After about three plus hours, they now look presentable. The data sheets are in .PDF. Both of these data sheets are very old (1980's). The sheets from Radio Shack were more helpful Amateur Radio wise. But I see now that the manufactuer has the better datasheet these days. For the latest go to www.exar.com and search "XR2211" as the new datasheets are much improved. For information on how to design a modem for Amateur Radio use using the XR2206 and XR2211, see the XR modem page.
TCM3105 Data Sheet
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TCM3105 data sheet (588k)The TCM3105 is a modem IC. For Amateur Radio use, it's only good for 1200 baud operation. They require a crystal and are TTL based. For use with a PC, you would need an TTL to RS-232 transceiver IC. There data sheets for those too further down this page. There are eleven sheets in .PDF. About the last sheet, I don't know what it's part of but it has a AM7910 and TCM3105 tied together. See the TCM3105 modem page for further details.
MAXIM Data Sheet
Visit maxim-ic.com where you can download the most current MAXIM data sheets for the MAX202E through MAX213E, MAX232E, and MAX241E in .PDF format.
Not only can you get the data sheet you want, but you can also request a free sample with shpping.
If you request a sample and you want and IC you can work with (not surface mount), request the sample in 16 pin DIP or 20 pin DIP package depending on the number of pins it has.
For RS-232 transceiver ideas see the TTL to RS-232 page.
AM79101 AM7910 Data Sheet
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AM79101 / AM7910 data sheet (1.4MB)
This is a great modem IC for Amateur Radio use on 300 / 1200 baud operations. The IC requires a crystal and is TTL based. You'd be hard pressed to find the 58 page manual / data sheet else where! I had to use a low resolution scan and heavy compression due to web space and bandwidth allotment. I have checked each page for readability and or printability. I can read them all. The data sheets are in .PDF format. Note: It's actually for the AM79101 not the 7910. If you are working with the 7910, download this data sheet anyway. There is only one component difference between the two. Manual made in 1987! See the AM7910 / AM79101 modem page for more details.
AM79101 AM7910 AM7911 Technical Manual
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AM79101 AM7910 and AM7911 Technical Manual (3.3MB)Note: You might want to see the Table of Contents before downloading. (May not really need this manual.)
There are a total of 69 pages. Due to limited web space and bandwidth allotment, I had to use a low resolution scan and heavy compression. I have checked each page for readability and or printability. I can read them all. The tech manual is in .PDF. Manual made in 1988!
LTC1383 Data Sheet
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LTC1383 data sheet (183k) The LTC1383 claims to be a pin for pin compatible TTL to RS-232 transceiver integrated circuit with the MAXIM MAX232 and MAX202. In comparing the data sheets between the MAX202 and LTC1383 there is only one small difference. On the MAX202, pin 2, there is a .1uF capacitor going to the +5v source. With the LTC1383, pin 2 has the .1uF capacitor going to ground. There are eight pages to this data sheet in .PDF.
Notice...
You are encouraged to check all of the pages on this web site for the information you seek, starting at the main page. Each page is possibly related to another. The information on each page is "as-is", try at your own risk, and so on. We can help you out some what, as time permits. Try to stay on topic. Please, do not ask to "engineer" or "re-engineer" a design to suit your special project. We do not sell parts or kits of any kind. All said, we are open to any suggestions on adding more material, as long as it is on topic with a particular web page of the Technicothica web site. An example of things that are not "on topic" are: Support for APRS, EMWIN, TNC's and sound card stuff. ~Thanks!
