DS2245 FULL DATA SHEET AVAILABLE CALL 214-450-3836 DALLAS SEMICONDUCTOR DS2245 Soft Modem Stik FEATURES Bell 212A/103 and CCITT V.22bis/V.22/V.21 Full-duplex operation at 2400, 1200 and 300 bps Familiar AT command set FCC Part-68 pre-certified when used w/DS2249 DAA Teleservicing mode allows reloading/monitoring of DS2250 Soft microcontroller Stik @ Provides remote software updates without host coop- eration Generates and interprets DTMF tones @ Auto-answer and Originate modes Parallel interface connects to PC or other bus Reprogrammable with firmware upgrades @ +5V operation Low power operation consumes under 400 mW @ Extremely small form factor 30-pin SIMM connection scheme DESCRIPTION The DS2245 Soft Modem Stik is a data communication subsystem which forms a complete 2400/1200/300 bps modem when combined with the DS2249 DAA. The DS2245-24 supports V.22bis, V.22, V.21 as well as Beil 212A and 103. The DS2245-12U supports the latter Bell standards only. In addition to industry-standard, AT-type commands, the DS2245 provides decoding of incoming DTMF tones. This allows a host system to accept com- PIN ASSIGNMENT Oo 1 we DODOODOOOOI0000000000000000000 | ORDERING INFORMATION DS2245-12U 1200 BPS U.S. ONLY DS2245-24 2400 BPS INT'L. PIN NAMES 1 CP.2 16 D7 2 CP.1 17 D 3 oH 18 WR 4 Ri 19 DS 5 SPEN 20 RD 6 CP3 21 AIN 7 CP.0 22 NC 8 D4 23 A2 9 D3 24 Al 10 D2 25 AO 1 D1 26 OuTT 12 vcc 27 UR 13 po 28 AQUT 14 GND 29 INT 15 cs 30 PROG mands from a remote site where a modem is not avail- able. A unique Teleservicing mode allows a central loca- tion to dial up a remote system and examine, edit, or reload the program/data memory contents of that sys- tem. The DS2245 is designed for embedded applica- tions that benefit from communication with the outside world, and for which a familiar AT command set is de- sired. 061291 1/1 15-4