Sierra Semiconductor SC11000/SC11001/SC11005 Modem Filters Datasheet

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Brand: Sierra
Category: Other Electronics
Document type: Datasheet
Language: English
Pages: 12
File format: PDF
File size: 459 KB
Published: 06 July, 2012
Updated: 30 September, 2023
MD5 checksum: 2711B71B168887784BD78B81E1A55F20
PDF: Sierra Semiconductor SC11000/SC11001/SC11005 Modem Filters Datasheet PDF

About this manual

The SC11000, SC11001, and SC11005 are monolithic CMOS switched-capacitor filter circuits designed for use in full-duplex 1200 and 2400 Bit Per Second modems. They meet the requirements of the Bell 212A, CCITT V.22, and V.22bis specifications and include high-band (2400 Hz) and low-band (1200 Hz) filters, half-channel compromise amplitude and group delay equalizers, and smoothing filters for both bands. For CCITT V.22 and V.22bis applications, a notch filter is included that can be programmed for either 550 Hz or 1800 Hz.

What's inside

Features
General Description
Pin Descriptions
Functional Description
Low-Band Filter
High-Band Filter
V.22 Notch Filter
Uncommitted Operational Amplifiers
Analog Loop-Back
Selection

Specifications

Compatible Standards	Bell 212A, CCITT V.22 and V.22bis
Data Rates	1200 and 2400 Bit Per Second
Low-Band Filter Center Frequency	1200 Hz
High-Band Filter Center Frequency	2400 Hz
Notch Filter Frequencies	550 Hz or 1800 Hz
Package Types	26-PIN DIP, 26-PIN PLCC
Clock Frequency (CLK2)	153.6 kHz

Frequently asked questions

What are the notch filter frequency options?

The notch filter can be programmed for either 550 Hz or 1800 Hz depending on the NSEL pin state.

How does the low-band filter frequency scale in Call Progress Monitoring mode?

If pin 12 (CPM) is high, the low-band filter response is scaled down by a factor of 2.5, moving the center frequency to 480 Hz.

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