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HT93214B Datasheet(PDF) 5 Page - Holtek Semiconductor Inc |
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HT93214B Datasheet(HTML) 5 Page - Holtek Semiconductor Inc |
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5 / 16 page  Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions TFP Pause Time After Flash 2.5V ¾¾ 800 ¾ ms TRP One-key Redialing Pause Time 2.5V ¾¾ 800 ¾ ms FOSC System Frequency ¾¾ ¾ 3.58 ¾ MHz TDB Key-in Debounce Time 2.5V ¾¾ 20 ¾ ms TBRK Break Time For One-key Redialing 2.5V ¾¾ 2.2 ¾ s THKDL Off-hook Delay Time 2.5V 10pps ¾ 800 ¾ ms 20pps ¾ 500 ¾ Pulse Mode Electrical Characteristics FOSC=3.5795MHz, Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions IPOH PO Output Source Current 2.5V VOH=2V -0.2 ¾¾ mA IPOL PO Output Sink Current 2.5V VOL=0.5V 0.2 0.6 ¾ mA PR Pulse Rate ¾ MODE pin is connected to VDD ¾ 10 ¾ pps MODE pin is opened ¾ 20 ¾ M/B Make/Break Ratio ¾¾ ¾ 33:66 ¾ % TPDP Pre-digit-pause Time ¾ M/B=33:66 (10 pps) ¾ 33 ¾ ms M/B=33:66 (20 pps) ¾ 17 ¾ TIDP Inter-digit-pause Time ¾ 10 pps ¾ 800 ¾ ms 20 pps ¾ 500 ¾ TM Pulse Make Duration ¾ 10 pps, M/B=1/2 ¾ 33.3 ¾ ms 20 pps, M/B=1/2 ¾ 16.7 ¾ TB Pulse Break Duration ¾ 10 pps, M/B=1/2 ¾ 66.6 ¾ ms 20 pps, M/B=1/2 ¾ 33.3 ¾ TP Pause Time ¾¾ ¾ 2.2 ¾ s Tone Mode Electrical Characteristics FOSC=3.5795MHz, Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions VTDC DTMF Output DC Level ¾ No load 0.45VDD ¾ 0.7VDD V ITOL DTMF Sink Current 2.5V VDTMF=0.5V 0.1 ¾¾ mA VTAC DTMF Output AC Level ¾ Row group, RL=5k W 0.12 0.155 0.18 Vrms RL DTMF Output Load 2.5V THD £-23dB 5 ¾¾ k W ACR Column Pre-emphasis 2.5V Row group=0dB 1 2 3 dB THD Tone Signal Distortion 2.5V RL=5k W¾ -30 -23 dB TTMIN Minimum Tone Duration ¾ Auto-redial ¾ 94 ¾ ms TITPM Minimum Inter-Tone Pause ¾ Auto-redial ¾ 96 ¾ ms THD (Distortion) (dB) = 20 log ( V1 V2 .... Vn 22 2 ++ + / Vi Vh 22 + ) Vi, Vh: Row group and column group signals V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz) HT93214 Series Rev. 1.10 5 October 2, 2002 |
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