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Modem* chips

Current manufacturers of up-to-date modem* chips:
AT&T*
Cermetek (not Cermatek)
Rockwell
Sierra
SSI
TI
Xecom
Yamaha

Makers of slow modems:

AMD Obsolete so expensive!
Texas (TCM3105) This one is obsolete and therefore expensive!
www.cmlmicro.co.uk/Products/Wireless_Data/ Slow modem* chips by CML

List of modem chips


Date:    19961008
From:    Bruce Cannon
To:      pics@parallaxinc.com
Subject: Re: [PICS] Modem*

I have an application for using PIC16C84 and some serial EEproms in a remote data logger. I have been using an old 2400 baud* external modem* but now need to build in quanity and am looking for a 1200 or 2400 modem* on a chip or few chips. Does anyone have any experience with or knowledge of single chip modems?

Xecom and Cermetek both make totally self-contained single-chip modems for about $60 qty 1. I've used xecom's, but am thinking of switching to Cermetek; seems to be more well documented, and are cheaper and smaller. Both support a simple two-wire interface (TX and RX) to the micro*. NO additional components are required.


Date:    19961016
From:    Pekka Ritamaki
To:      pics@parallaxinc.com
Subject: Re: [PICS] Modem* Cermetek CH1786

I have an application for using PIC16C84 and some serial EEproms in a remote data logger. I have been using an old 2400 baud* external modem* but now need to build in quanity and am looking for a 1200 or 2400 modem* on a chip or few chips.

Xecom and Cermetek both make totally self-contained single-chip modems for

I just finished product development with Cermetek CH1786 2400 modem* module 24 DIP. It connects directly to phone line and 8051 TX,RX pin ( or PIC). It needs 5V DC power and modem* control bit DTR. I use also Ring Indicator bit. It works normally with AT-commands. Basicly it works. Pekka Ritamaki PROBYTE Oy Nirvankatu 31 FIN-33820 TAMPERE Finland www.sci.fi/~pri Electronics product design: hardware+software+development tools puh INT +358-31-2661885 fax INT +358-31-2661886



Date:         16 Oct 96
From:         alan.ballweg@alias.fdn.fr (ALAN BALLWEG)
Organization: Association Informatique & Reseaux - Alias BBS France
To:           PICS@parallaxinc.com
Subject:      Re: [PICS] Re: Looking for so
Does any one have the experience of integrating RF Transmitter/or receiver with the PIC ? Where to get the ready made RF Transmitter and Rcver ( Short range about 10 meters which can send digital data ).
LEE ( Malaysia)

I've used the MIPOT modules (AUREL is a similar product) which are available in Europe, from the USA Holtek and Ming come to mind (available from Digikey 1-800-DIGIKEY). They are small modules, very easy to use, digital goes into one pin, is transmitted, received, and the digital comes out another pin. The AM* modules transmit at up to 2400 baud*, the FM* modules up to 9600 baud*. About 100meter range. I don't know what's available in Malaysia. I've had good experience with the MIPOT and AUREL modules, in tough real-world field conditions. I've heard that the Holtek modules can be 'tweaked' to give up to 5 miles range but I don't know the details.

Rockwell presented their position in the telecommunications IC* market and showed off a little about the 56K "modem*" technology (but I found most of that info beforehand on plainfield.bypass.com/~gzaret/hiband.56k.html, especially follow the link "56 Kbps Communications Across the PSTN", which points to a white paper from Rockwell).
Ernst Ahlers

TI DSP* Chipset Backs USR High-Speed Modems
HOUSTON, TEXAS (October 16, 1996) -- Texas Instruments (TI), the industry leader in digital signal processing (DSP*) solutions, announced the immediate availability of modem* chipsets compliant with 56 kilobits-per-second (kbps) "x2" technology from US Robotics Corp. (USR, Chicago, Illinois). TI's chipset platform for the new 56 kbps modems gives modem* makers a distinct competitive advantage by providing a proven chipset that is currently in full production, and facilitates a flexible software modem* solution based on a software programmable digital signal processor (DSP*) chip.
www.ti.com/ - Full text

Ad for PCI video capturing boards by Dektec.
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