MT88L85AN1 查看數據表（PDF） - Zarlink Semiconductor Inc

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MT88L85AN1

3 V Integrated DTMF Transceiver with Power-Down and Adaptive Micro Interface

Zarlink Semiconductor Inc 

MT88L85

VDD

St/GT

R1

ESt

VDD

St/GT

R1

ESt

tGTP = (RPC1) In [VDD / (VDD-VTSt)]

tGTA = (R1C1) In (VDD/VTSt)

RP = (R1R2) / (R1 + R2)

C1

R2

a) decreasing tGTP; (tGTP < tGTA)

tGTP = (R1C1) In [VDD / (VDD-VTSt)]

tGTA = (RpC1) In (VDD/VTSt)

RP = (R1R2) / (R1 + R2)

C1

R2

b) decreasing tGTA; (tGTP > tGTA)

Figure 6 - Guard Time Adjustment

Data Sheet

7

Zarlink Semiconductor Inc.

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