AS2525B austriamicrosystems, AS2525B Datasheet

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... FCI DPN DIALLER LED DI DO CLK Revision 2.1 austriamicrosystems General Description The AS2525 is a CMOS mixed-mode integrated circuit for use in feature phones, answering machines and fax machines. It contains an analogue line interface and speech circuit for a/b terminals, loudhearing, handsfree, enhanced LD/MF dialler, tone ringer with dc/dc converter and serial interface to EEPROM and LCD-driver (AS2591), all pin package ...

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... Switch Input 4 icrophone Input 2 icrophone Input 3 icrophone Input 1 icrophone Input T B ide one alance Input S urrent hunt Control Output S S oltage ource ource I ine nput I eceive nput S upply ource Control Output S ine Current ense Input I omplex mpedance Input austriamicrosystems Description Page ...

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... Switching Input O H eceive utput to andset D D oltage rain rain G nd nalogue rou M onverter ake Output O 1/2 oudspeaker utputs ( loudspeaker ial ode/ eadset ode Switch Input C I requency omparator nput Output illator Input R ows C olumns ata nput austriamicrosystems Description to 300 . Page ...

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... Revision 2.1 O ata utput resistor connected from this pin to VSS enables key locking hip elect AI: AO: AI/O: Keyboard Layout Figure 1: Keyboard Layout Maximum R Minimum R See “Table 1: Key definitions” for description of key functions austriamicrosystems Description Analogue Input Analogue Output Analogue Input/output R ...

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Datasheet AS2525 Key Definitions and Procedures Table 1: Key definitions Key Condition [0] - [9], Off-hook [#], [ ] LD mode [ ] Speech mode [PG] Program mode Speech mode Mute state [MT] Program mode [R/P] Program state [FL] [V+] ...

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Datasheet AS2525 Table 3: Parameter settings Parameter Symbol Inter-Digit Pause (LD) IDP MF Tone Duration TD MF Inter-Tone Pause ITP Flash 1 Duration FL1 Flash 2 Duration FL2 Pause 1 Duration P1 Pause 2 Duration P2 Pre-Digit Pause (LD) PDP ...

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Datasheet AS2525 Parameter Symbol Flash 1 During LD Flash 2 During LD Extended LCD Symbols Tx Soft Clip, Handsfree Rx Soft Clip, Handsfree Voice Switching, Speed Handset/Headset Volume LCD Test Temporary with tone Key Lock Function Pin ...

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... AS2591 data sheet) [PG] + [9] + [0] = Off and [ Press [PG] to store setting and terminate procedure austriamicrosystems Options Key in two digits, use [MT] for blank Key in two digits, use [MT] for blank [0] = unlocked and [1] = locked Press [1] to clear ...

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Datasheet AS2525 Memory Allocation The EEPROM memory consists of three areas factory settings user settings stored numbers programmed in factory …write/read by AS2525 Figure 3: Memory allocation for external EEPROM The AS2525 is writing ...

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Datasheet AS2525 Side-Tone A good side-tone cancellation can be achieved by using the following equation BAL LINE This is assuming that the side-tone reference resistor, R2 (between LI and STB) is 300 and ...

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... TX_atten RX Figure 6: Handsfree voice switching ] A background monitoring circuit is incorporated. This circuit can be enabled/disabled as required Table 17: Background noise monitoring selection [PG] + [0] + (Password) + [#] + [6] + (digit) + [PG] Digit Background Noise Monitoring [0] Disabled [1] Enabled austriamicrosystems Voice Backgnd speech switching noise monitor . Page ...

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... IDLE-mode 0dB -10dB -20dB Vol min -25dB -30dB -40dB -50dB Figure 8: Gain transition of voice switching austriamicrosystems +23dB Peak Compress Offset detector comp FT1 Cmicoffset CBckgnd Remark adjustable with [V+]/[V-] keys in 8 steps middle position independent of [V+]/[V-] keys TX-mode ...

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Datasheet AS2525 Loudhearing A loudhearing mode can be enabled/disabled through the set-up programming. Table 19: Loudhearing mode selection [PG] + [0] + (Password) + [#] + [7] + (digit) + [PG Digit Loudhearing [0] Enabled ( provided) [1] ...

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Datasheet AS2525 Dialing and Control Functions Valid Keys The key scanning is enabled in off-hook mode with V above valid key is detected from the keyboard by REF connecting the appropriate row to the column (R k ...

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Datasheet AS2525 4. Press [PG] (= store and exit on-hook to abort Reset to Factory Settings It is possible to reset all settings to the default factory settings with following procedure: 1. Press [PG] to enter program mode ...

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Datasheet AS2525 Memory Storing Procedure numbers, each with maximum 24 digits, can be stored into the external EEPROM. The store procedure is as follows: 1. Press [PG] to enter program mode 2. Enter location (MR + digit ...

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Datasheet AS2525 Table 28: Pacifier tone selection [PG] + [0] + (Password) + [#] + [9] + (digit) + [PG] Digit Pacifier Tone (Key-in Tone) [0] Disabled [1] Enabled Table 29: Pacifier tones Key Entry Frequency Acknowledge 1333 Hz Reject/Terminate ...

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Datasheet AS2525 Electrical Characteristics Absolute maximum ratings Positive Supply Voltage Input Current Input Voltage (LS) Input Voltage (LI, CS) Input Voltage (STB, RI) Digital Input Voltage Electrostatic Discharge Storage Temperature Range Total Power Dissipation * Exceeding these figures may cause ...

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Datasheet AS2525 AC Electrical Characteristics mA 800 Hz; ZAC = 1000 ; recommended operating conditions and default settings unless otherwise specified. LINE Transmit Symbol Parameter A Transmit Gain, default TX Variation with Frequency THD Distortion ...

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Datasheet AS2525 Receive Symbol Parameter A Receive Gain, Default RX A Volume Control Range RX-VOL Variation with Frequency A RX THD Distortion, RO Distortion, LO1/LO2 V Soft Clip Level AGC A Soft Clip Overdrive SCO t Attack Time DECAY t ...

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Datasheet AS2525 DTMF Symbol Parameter DF Frequency Deviation V MF Tone Level (Low Group Tone Level Range at LS MF-RANGE (Low Group) Pre-emphasis, Low to High V L_H V Unwanted Frequency UFC Components t Tone ...

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Datasheet AS2525 Tone Ringer Symbol Parameter F1 Frequency 1 F2 Frequency 2 F3 Frequency 3 t Detection Time DT f Min. Detection Frequency MIN f Max. Detection Frequency MAX Pacifier Tone Symbol Parameter V Tone Output Level, RO PARO Tone ...

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Datasheet AS2525 Timing Diagrams LD dialling MUTE MASK DPN t t IDP PDP LD dialling with access pause MUTE MASK DPN t t IDP PDP MF dialling MUTE MASK DPN TONE ITP Revision 2 ...

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Datasheet AS2525 Test Circuit A 100 µ I LINE 600 ohm 327 BC 327 Revision 2 µ ohm RI 11 STB 300 ohm 1 µ ...

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Datasheet AS2525 Typical Application Revision 2.1 Figure 11: Typical application Page ...

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... The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental ...

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... Shin Yokohama Kohoku-ku, Yokohama 222-0033, Japan Phone: +81/45/474 0962 Fax: +81/45/472 9845 Distributors & Representatives austriamicrosystems AG is represented by distributors in the following countries. Please contact your nearest regional sales office for the distributor address: Spain, Israel, Korea, Hong-Kong, Taiwan, Malaysia, Singapore, India, Brazil Application Support Please contact your local sales office or your distributor ...