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TEA1112T 数据表(PDF) 2 Page - NXP Semiconductors |
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TEA1112T 数据表(HTML) 2 Page - NXP Semiconductors |
2 / 20 page 1997 Mar 26 2 Philips Semiconductors Product specification Low voltage versatile telephone transmission circuits with dialler interface TEA1112; TEA1112A FEATURES • Low DC line voltage; operates down to 1.6 V (excluding polarity guard) • Voltage regulator with adjustable DC voltage • Provides a supply for external circuits • Symmetrical high impedance inputs (64 kΩ) for dynamic, magnetic or piezo-electric microphones • Asymmetrical high impedance input (32 kΩ) for electret microphones • DTMF input with confidence tone • Mute input for pulse or DTMF dialling (MUTE for TEA1112 and MUTE for TEA1112A) • Receiving amplifier for dynamic, magnetic or piezo-electric earpieces • AGC line loss compensation for microphone and earpiece amplifiers • LED on-hook/off-hook status indication • Microphone mute function (MMUTE for TEA1112 and MMUTE for TEA1112A). APPLICATION • Line powered telephone sets, cordless telephones, fax machines and answering machines. GENERAL DESCRIPTION The TEA1112; TEA1112A are bipolar integrated circuits that perform all speech and line interface functions required in fully electronic telephone sets. They perform electronic switching between speech and dialling. The ICs operate at a line voltage down to 1.6 V DC (with reduced performance) to facilitate the use of telephone sets connected in parallel. A current (proportional to the line current and internally limited to a typical value of 19.5 mA) is available to drive an LED which indicates the on-hook/off-hook status. The microphone amplifier can be disabled during speech condition by means of a microphone mute function. All statements and values refer to all versions unless otherwise specified. QUICK REFERENCE DATA Iline = 15 mA; VEE =0V; RSLPE =20 Ω; AGC pin connected to VEE; Zline = 600 Ω; f = 1 kHz; Tamb =25 °C; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Iline line current operating range normal operation 11 − 140 mA with reduced performance 1 − 11 mA ILED(max) maximum supply current available Iline =18mA − 0.5 − mA Iline >76mA − 19.5 − mA VLN DC line voltage 3.35 3.65 3.95 V ICC internal current consumption VCC = 2.9 V − 1.15 1.4 mA VCC supply voltage for peripherals Ip =0mA − 2.9 − V Gvtrx typical voltage gain range microphone amplifier VMIC = 2 mV (RMS) 38.8 − 51.8 dB receiving amplifier VIR = 6 mV (RMS) 19.2 − 31.2 dB ∆G vtrx gain control range for microphone and receiving amplifiers with respect to Iline =15mA Iline =85mA − 5.8 − dB ∆G vtxm microphone amplifier gain reduction − 80 − dB |
类似零件编号 - TEA1112T |
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类似说明 - TEA1112T |
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