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TEA1094A Scheda tecnica(PDF) 2 Page - NXP Semiconductors |
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TEA1094A Scheda tecnica(HTML) 2 Page - NXP Semiconductors |
2 / 28 page 1996 Jul 15 2 Philips Semiconductors Product specification Hands free IC TEA1094; TEA1094A FEATURES • Low power consumption • Power-down function (TEA1094A only) • Microphone channel with: – externally adjustable gain – microphone mute function. • Loudspeaker channel with: – externally adjustable gain – dynamic limiter to prevent distortion – rail-to-rail output stage for single-ended load drive – logarithmic volume control via linear potentiometer – loudspeaker mute function. • Duplex controller consisting of: – signal envelope and noise envelope monitors for both channels with: externally adjustable sensitivity externally adjustable signal envelope time constant externally adjustable noise envelope time constant – decision logic with: externally adjustable switch-over timing externally adjustable idle mode timing externally adjustable dial tone detector in receive channel – voice switch control with: adjustable switching range constant sum of gain during switching constant sum of gain at different volume settings. APPLICATIONS • Mains, battery or line-powered telephone sets with hands-free/listening-in functions • Cordless telephones • Answering machines • Fax machines. GENERAL DESCRIPTION The TEA1094 and TEA1094A are bipolar circuits intended for use in mains, battery or line-powered telephone sets, cordless telephones, answering machines and Fax machines. In conjunction with a member of the TEA106X, TEA111X families of transmission circuits, the devices offer a hands-free function. They incorporate a microphone amplifier, a loudspeaker amplifier and a duplex controller with signal and noise monitors on both channels. ORDERING INFORMATION TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TEA1094 DIP28 plastic dual in-line package; 28 leads (600 mil) SOT117-1 TEA1094A DIP24 plastic dual in-line package; 24 leads (600 mil) SOT101-1 TEA1094T SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1 TEA1094AT SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 TEA1094AM SSOP24 plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1 |
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