u4037b-n ETC-unknow, u4037b-n Datasheet
u4037b-n
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u4037b-n Summary of contents
Page 1
... Speech and Ringer Circuit Description The C-controlled telephone circuit U4037B lin- ear integrated circuit for use in telephone sets. It contains the speech circuit, tone-ringer interface, sidetone equiva- Features D DC characteristic adjustable D Receive gain adjustable D Symmetrical input of microphone amplifier D Anti-clipping in transmit direction ...
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... U4037B-N Pin Description 1 MICO TXACL 4 AGA DTMF 5 6 VOL1 MU/VOL2 7 MEL VMP 10 11 VRING OUT2 12 16276 Figure 1. Pinning Pin Symbol Function 1 MICO Output of microphone preamplifier 2 ST Sidetone reduction input input resistance is approx TXACL Time constant of anti-clipping in transmit path ...
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... Detailed Block Diagram with External Components Rev. A3, 06-Mar- Figure 2. Application circuit Preliminary Information U4037B (7) ...
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... U4037B-N Absolute Maximum Ratings Parameters Line current DC line voltage Maximum input current Junction temperature Ambient temperature Storage temperature Total power dissipation amb Thermal Resistance Parameters Junction ambient SO24 Electrical Characteristics kHz, 0 dBm = 775 mA, T rms MP Parameters DC characteristics DC voltage drop over circuit ...
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... C amb mA, L RDC = 130 RING out f = 300 Hz to 3400 Hz I > 1.5 V TIP/RING rms Preliminary Information U4037B-N Min. Typ. Max. = 300 – "0.5 RF "0.5 R "0 0.775 1.2 –64 40 –7.0 – ...
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... U4037B-N Electrical Characteristics (continued) Parameters Ringing part: Ri Ringer output voltage Volume adjustment steps Zener diode voltage PD Input PD input current Input voltage Voltage drop Internal current comsumption Package Information Package SO24 Dimensions in mm 15.55 15.30 0.4 1.27 13. (7) Test Conditions / Pin Symbol ...
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... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A3, 06-Mar-01 Preliminary Information U4037B-N http://www.atmel–wm.com 7 (7) ...