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AS2522B

Telecom 6mA Line Interface Unit (LIU) Serial -25Â°C ~ 70Â°C 32-TQFP (7x7)

Product Category: Telecom Interface ICs
Mfr. Part #
AS2522B
Manufacturer: ams
Package: QFP
Lead Free Status /RoHS Status:
Data Sheet: AS2522B Datasheet
Inventory: In Stock

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Mfr. Part #: AS2522B

Specifications
Product Details

Specifications

Manufacturer AMS

Product Category Telecom Interface ICs

Series -

Product Caller ID

Type CMOS Modem

Packaging Tape & Reel (TR)

Unit-Weight 0.002568 oz

Mounting-Style SMD/SMT

Package-Case 32-TQFP

Operating-Temperature -25Â°C ~ 70Â°C

Mounting-Type Surface Mount

Function Line Interface Unit (LIU)

Interface Serial

Voltage-Supply -

Supplier-Device-Package 32-TQFP (7x7)

Number-of-Circuits 1 Circuit

Watt *

Current-Supply 6mA

Maximum Operating Temperature + 70 C

Operating temperature range - 25 C

Operating-Supply-Voltage 3 V to 5 V

Operating-Supply-Current 25 mA

Interface-Type Serial (SPI)

Supply-Voltage-Max 5 V

Supply-Voltage-Min 3 V

Package-Case TQFP-32

Product Details

Description

AS2522 is a CMOS integrated circuit that incorporates DC and AC line adaptation (DC-mask and synthesized ACimpedance of 1000Ω) as well as a speech circuit with softclipping, line loss compensation and Rx-volume control for handset and handsfree operation. It shall act as an a/bline powered device, which is controlled by a CPU via a serial interface. Furthermore the AS2522 incorporates a DTMF, FSK transmitter, single tone and ringer tone generator.

AS2522 allows to use an off-the-shelf microprocessor without special blocks and functions for telephone applications. DTMF, FSK transmitter, single tone and ringer tone generator can be controlled via the serial interface as well as the gain settings in handset and handsfree mode.

Features

- Line/Speech circuit, DTMF dialer, FSK transmitter and tone ringer on a 32-pin CMOS-IC
- Enhanced voice switching
- Background noise monitoring
- DTMF tone generator
- FSK Transmitter V.23, BELL202, V.21, BELL 103
- Ringer tone programmable
- Tx- and Rx-gain programmable
- Digital volume control of Rx signals
- DC characteristic programmable
- Dual softclipping in handset mode
- Tx-softclipping in handsfree mode
- Common monitor amplifier for loudhearing, handsfree and ringing
- Supply voltage generation for external circuitry
- Automatic line loss compensation (LLC)
- Real and complex impedance selectable by external components
- Side tone adaptation selectable by external components
- Unique EMC performance
- Operating range from 15mA to 100mA (down to 5mA with reduced performance)
- Few external components

Applications

Enhanced handsfree feature phones with CallerID and extended displays.

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Mfr. Part #: AS2522B