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MT3370BS1 Datasheet(PDF) 10 Page - Zarlink Semiconductor Inc |
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MT3370BS1 Datasheet(HTML) 10 Page - Zarlink Semiconductor Inc |
10 / 15 page MT3170B/71B, MT3270B/71B, MT3370B/71B Data Sheet 10 Zarlink Semiconductor Inc. ‡ Typical figures are at 25 °C and are for design aid only: not guaranteed and not subject to production testing * Test Conditions 1. dBm refers to a reference power of 1 mW delivered into a 600 ohms load. 2. Data sequence consists of all DTMF digits. 3. Tone on = 40 ms, tone off = 40 ms. 4. Signal condition consists of nominal DTMF frequencies. 5. Both tones in composite signal have an equal amplitude. 6. Tone pair is deviated by ±1.5%± 2 Hz. 7. Bandwidth limited (0-3 kHz) Gaussian noise. 8. Precise dial tone frequencies are 350 Hz and 440 Hz ( ± 2%). 9. Referenced to lowest level frequency component in DTMF signal. 10. Referenced to the minimum valid accept level. 11. Both tones must be within valid input signal range. 12. External guard time for MT3x70B = 20 ms. 13. Timing parameters are measured with 70pF load at SD output. 14. Time duration between PWDN pin changes from ‘1‘ to ‘0‘ and ESt/DStD becomes active. 15. Guaranteed by design and characterization. Not subject to production testing. 16. Value measured with an applied tone of 450 Hz. 18 Interdigit pause accept (DStD logic output) tID 40 ms MT3x71B 19 Interdigit pause reject (DStD logic output) tDO 20 ms MT3x71B 20 Data shift rate 40-60% duty cycle fACK 1.0 3.0 MHz 13,15 21 Propagation delay (ACK to Data Bit) tPAD 100 140 ns 1MHz fACK, 13,15 22 Data hold time (ACK to SD) tDH 30 50 ns 13,15 AC Electrical Characteristics - voltages are with respect to V DD=5V±5%, VSS=0V and temperature -40 to +85°C unless otherwise stated. Characteristics Sym. Min. Typ.‡ Max. Units Test Conditions* |
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