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BN-1-GBLACK
MT3170B/71B, MT3270B/71B, MT3370B/71B Wide Dynamic Range DTMF Receiver Data Sheet Features February 2007 • Wide dynamic range (50 dB) DTMF Receiver • Call progress (CP) detection via cadence indication • 4-bit synchronous serial data output • Software controlled guard time for MT3x70B • Internal guard time circuitry for MT3x71B • Powerdown option (MT317xB & MT337xB) • 4.194304 MHz crystal or ceramic resonator (MT337xB and MT327xB) • External clock input (MT317xB) • Guarantees non-detection of spurious tones Ordering Information MT3170/71BE MT3270/71BE MT3370/71BS MT3370/71BN MT3370/71BSR MT3371BNR MT3270/71BE1 MT3171BE1 MT3170BE1 MT3370/BN1 MT3370/71BS1 MT3370/71BSR1 8 Pin PDIP 8 Pin PDIP 18 Pin SOIC 20 Pin SSOP 18 Pin SOIC 20 Pin SSOP 8 Pin PDIP* 8 Pin PDIP* 8 Pin PDIP** 20 Pin SSOP* 18 Pin SOIC* 18 Pin SOIC* *Pb Free Matte Tin **Pb Free Tin/Silver/Copper Tubes Tubes Tubes Tubes Tape & Reel Tape & Reel Tubes Tubes Tubes Tubes Tubes Tape & Reel -40°C to 85°C Applications • Integrated telephone answering machine • End-to-end signalling • Fax Machines PWDN ➀ VDD Steering Circuit Voltage Bias Circuit VSS INPUT AGC High Group Filter Antialias Filter Dial Tone Filter Digital Detector Algorithm Low Group Filter ➁ OSC2 OSC1 (CLK) Digital Guard Time➂ Code Converter and Latch Parallel to Serial Converter & Latch Mux Oscillator and Clock Circuit Energy Detection To All Chip Clocks ➀ MT3170B/71B and MT337xB only. ➁ MT3270B/71B and MT337xB only. ➂ MT3x71B only. Figure 1 - Functional Block Diagram 1 Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 1995-2007, Zarlink Semiconductor Inc. All Rights Reserved. ESt or DStD ACK SD
MAC8
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