RFX144V12

The RFX144V12 is a kind of MONOFAX facsimile modem. It features an advanced Rockwell proprietary voice compression algorithm which can compress voice to 5.7 kbps with near toll quality playback, allowing up to 12 minutes of speech to be stored in 4 Mbits of memory. Facsimile modem and digital answering machine codec functions are integrated into a single device. The device provides a programmable DTMF receiver and three programmable tone detectors. The tone detectors operate concurrently with all modes. The device is available in a 100-pin PQFP package.

There are some RFX144V12 features as follows: (1)V.27 ter short train; (2)caller ID reception; (3)concurrent DTMF, FSK and tone reception; (4)programmable transmit level; (5)receive dynamic range: 0 to -43 dBm; (6)programmable dual tone detection; (7)programmable tone detection; (8)programmable interface memory interrupt; (9)programmable ring detector; (10)8-bit or 16-bit high quality audio mode transmission/reception; (11)DTE interface: two alternate ports: selectabel microprocessor bus (6500 or 8085) and CCITT V.24 (EIA/TIA-232-E compatible) interface; (12)TTL and CMOS compatible; (13)+5 V operation; (14)power consumption: normal: 500 mW (typ) and sleep: 10 mW (typ).

The following is about the RFX144V12 absolute maximum ratings: (1)supply voltage, VCC: -0.5 to +7.0 V; (2)input voltage, VIN: -0.5 to VDD+0.5 V; (3)input voltage, VIN: -0.3 to VAA+0.3 V; (4)voltages applied to outputs in high impedance (off) state, VHZ: -0.5 to VCC+0.5 V; (5)DC input clamp current, IIK: ±20 mA; (6)DC output clamp current, IOK: ±20 mA; (7)static discharge voltage (25), VESD: ±2500 V; (8)latch-up current (25), ITRIG: ±200 mA; (9)operating temperature range, TA: 0 to 70 commercial and -40 to +85 extended; (10)storage temperature range, TSTG: -55 to +125.