U4055B TEMIC Semiconductors, U4055B Datasheet
U4055B
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U4055B Summary of contents
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... Low-Voltage Electronic Speech Circuit with Dialer Interface Description The U4055B electronic speech circuit is a linear integrated circuit for use in telephone and other line fed terminal equipment. It replaces the common speech circuit with carbon microphone, hybrid transformer, Features D An electronic circuit replaces the microphone hybrid ...
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... U4055B/U4055B1 Pin Description Pin Symbol Function and H The push-pull complementary 1 2 outputs of the receive amplifier. Dynamic transducers with a minimum impedance of 100 can be directly driven by these outputs. 3 GND Ground The output of the sidetone cancellation signal, which requires a balanced impedance of 8–10 times the subscribers line impedance to be connected to Pin 13 ...
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... Reference point Pin 3, unless otherwise specified. Parameters Line current DC line voltage Power dissipation 100 mA L Junction temperature Ambient temperature range Storage temperature range Thermal Resistance Parameters Junction ambient TELEFUNKEN Semiconductors Rev. A1, 06-May-96 Preliminary Information U4055B/U4055B1 Figure 2. Symbol Value I 200 L Pin 560 tot T 150 j T – ...
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... U4055B/U4055B1 Electrical Characteristics Reference point Pin 3, cable equivalent = km unless otherwise specified. DC amb Parameters Test Conditions / Pins Line voltage mA, see figure 4 L Transmit and sidetone Input resistance Pin Gain adjustable with Noise at line weighted psophometrically MIC Sidetone reduction DTMF-Amplifier Input resistance Pin ...
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... TELEFUNKEN Semiconductors Rev. A1, 06-May-96 Preliminary Information U4055B/U4055B1 Figure 3. Receiving amplifier 5 (10) ...
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... U4055B/U4055B1 Figure 4. Line and supply voltage characteristics 6 (10) Preliminary Information TELEFUNKEN Semiconductors Rev. A1, 06-May-96 ...
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... TELEFUNKEN Semiconductors Rev. A1, 06-May-96 Preliminary Information U4055B/U4055B1 Figure 5. Transmitting amplification 7 (10) ...
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... U4055B/U4055B1 8 (10) Preliminary Information Figure 6. DTMF amplifier TELEFUNKEN Semiconductors Rev. A1, 06-May-96 ...
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... Ordering Information Extended Type Number U4055B1 U4055B Dimensions in mm TELEFUNKEN Semiconductors Rev. A1, 06-May-96 Preliminary Information U4055B/U4055B1 Package DIP16 High level mute DIP16 Low level mute Remarks 9 (10) ...
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... U4055B/U4055B1 Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment ...