BL1062A

( DataSheet : www.DataSheet4U.com ) BL1062/BL1062A Low voltage transmission circuits with dialer interface 1 16 15 14 13 12 11 10 9 GENERAL DESCRIPTION The BL1062 and BL1062A are Bipolar integrated circuits that perform all speech and line interface functions required in fully electronic telephone sets. They perform electronic switching between dialing and speech. The ICs operate at line voltage down to 1.6V DC to facilitate the use of more telephone sets connected in parallel. ²ÉÓà 2 3 4 6 7 8 BL1062 ) 5 ( 1062A 16 ½ÅË«ÁÐÖ±²åÊÜ·â FEATURES Low DC line voltage; operates down to 1.6V Voltage regulator with adjustable static resistance Provides a supply for external circuits Symmetrical hign-impedance input(64k¦¸ )for dynamic, magnetic or piezoelectric microphones Asymmetrical hign-impedance input(32¦¸ )for electret microphones DTMF signal input with confidence tone Mute input for pulse or DTMF dialing ¡ª ¡ª BL1062: active HIGN (MUTE) BL1062A: active LOW ( MUTE ) Receiving amplifier for dynamic, magnetic or piezoelectric earpieces Large gain setting ranges by external resistance on receiving and transition amplifiers Line loss compensation (line current dependent) for microphone and earpiece amplifiers Compatible with TEA1062/1062A Process with 3um Bipolar technics PARAMETERS LIMITING VALUES Positive continuous line voltage Vln 12V Repetitive line voltage during switch-on or line interruption Vln(r) 13.2V Repetive peak line voltage for a 1 ms pulse per 5 s Vln(rm) 28V Li...