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ML7005MB 数据表(PDF) 11 Page - OKI electronic componets |
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ML7005MB 数据表(HTML) 11 Page - OKI electronic componets |
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11 / 25 page ![]() ¡ Semiconductor ML7005 11/24 AC Characteristics 5 DTMF Receiver *1 See the figure 3 for timing. The input level includes the entire range indicated in VDETDT1 and VDETDT2. The input frequency includes the entire range indicated in fDETDT. Parameter Symbol Condition Typ. Unit DTMF Detect Amplitude VDETDT1 — Min. Max. –42 –10 dBm —0 –42 — –60 — Per Frequency at DTRIO 2.7 V £ VDD £ 5.5 V (VDD = 2.7 to 5.5 V, Ta = –30 to +85°C) 4.5 V £ VDD £ 5.5 V DTMF Non-detect Amplitude VREJDT Signal Repetition Time tCYCDT0 tCYCDT1 Time to Detect tDETDT0 tDETDT1 ms — 90 — —— 60 DTTIM = "0" DTTIM = "1" Detect Frequency fDETDT — +1.8 –1.8 Non-detect Frequency fREJDT —— 3.8 — –3.8 — — +6.0 –6.0 VHigh Group - VLow Group Level Twist VTWIST –12 — — N/S (N : 0.3 to 3.4 kHz) Noise to Signal Ratio VN/S 45 — — 360 to 440 Hz Dial Tone Rejection Ratio VREJDT % dB Time to Reject tREJDT0 tREJDT1 — 49 — —— 35 Acceptable Drop Out Time tBRKDT10 tBRKDT11 tBRKDT20 tBRKDT21 Interdigit Pause Time tPOSDT0 tPOSDT1 Detect Delay Time tDELDT0 tDELDT1 Detect Hold Time tHOLDT0 tHOLDT1 SP Delay Time tSP — —10 — —24 — 21 — — 30 — — — 0.4 — — 0.4 — —3 — —10 26 12 37 41 24 49 20 15 27 28 24 35 To Nominal Frequency DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" DTTIM = "0" DTTIM = "1" Detect Non-detect SP = "1" (Before output) SP = "0" (During output) 0.6 0.2 1.0 DTTIM = "1", "0" *1 VDETDT2 |
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