SC91710B

SC91710A/B T/P SWITCHABLE DIALER WITH REDIAL HANDFREE FUNCTION DESCRIPTION The SC91710A/B are Tone/Pulse switchable dialer which are fabricated in COMS technology with wide operating voltage for both tone and pulse mode, and consumes very low memory retention current in ON-HOOK state. FEATURES * Tone/Pulse switchable dialer * One 32-digit last number redial memory * Pulse-to-tone (P→T) is provided for PBX operation * Flash key is available * Minimum tone duration is 98ms or 83ms * Minimum intertone pause is 98ms or 83ms * Redial Pause time (0ms) * Uses 3.579549MHz crystal or ceramic resonator * Many options can be selected Mode (10PPS; 20PPS; Tone) M/B ratio (40:60;33:66) Pause time (3.6s) * Flash function (RESET) (P→T) pause time (3.6s) Flash time (600ms; 300ms; 100ms; or 80ms) * Power on reset circuit is provided * Handfree function is provided for speaker phone application * Packaged in 16-DIP or 18-DIP ORDERING INFORMATION Device Package SC91710A DIP-16-300-2.54 SC91710AS SOP-16-225-1.27 SC91710B DIP-18-300-2.54 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2007.03.07 Page 1 of 18 BLOCK DIAGRAM SC91710A/B Kernel Control CKT. LNB memory KEYBOARD ASSIGNMENT C1 C2 C3 R1 1 2 3 R2 4 5 6 R3 7 8 9 R4 * 0 # C4 P→T F P RD 1) P→T: In pulse mode, execute P→T function. 2) P: Pause key. 3) F: Flash key 4) RD: Redial key DIALING SIGNAL OPTION A: Flash time Row3 Row4 NR NR NR R R NR RR Flash time(ms) 600 300 100 80 C: Tone function Col1 To...