ML2021CSX Fairchild Semiconductor, ML2021CSX Datasheet

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ML2021CSX

Manufacturer Part Number
ML2021CSX
Description
Telecom Voice Conditioning ICs Phone Line Equalizer Group Delay Tuned
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of ML2021CSX

Mounting Style
SMD/SMT
Number Of Channels
8
Package / Case
SOIC-18
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Package Type
SOIC
Pin Count
18
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
• Slope, height, and bandwidth adjustable
• Optimized group delays (500 Hz to 6.4 kHz)
• On chip anti-alias filter
• Bypass mode
• Low supply current 6 mA typical from ±5V supplies
• TTL / CMOS compatible interface
• Double buffered data latch
• Selectable master clock 1.544 or 1.536 MHz
• Synchronous or asynchronous data loading capability
• Compatible with ML2003 and ML2004 logarithmic
Block Diagram
ML2021
Telephone Line Equalizer
LATI
CLK
SID
P
gain/attenuator
V
DN
IN
GENERATOR
ANTIALIAS
SECTION
LO PASS
SLOPE
CLKSEL
CLOCK
5
SCK
14-BIT SHIFT REGISTER
14-BIT LATCH
SECTION
HEIGHT
4
14
V
SMOOTHING
CC
BANDPASS
FILTER
SECTION
MUX
LATO
AGND
4
V
SS
1
GND
SOD
V
OUT
General Description
The ML2021 is a monolithic analog line equalizer for tele-
phone applications. The ML2021 consists of a switched
capacitor filter that realizes a family of frequency response
curves optimized for telephone line equalization while mini-
mizing group delay.
The ML2021 consists of a continuous anti-aliasing filter,
three programmable switched capacitor equalization filters,
an output smoothing filter, a 600 Ω driver, and a digital
section for the serial interface.
The equalization filters adjust the slope, height, and band-
width of the frequency response. The desired frequency
response is programmed by a digital 14-bit serial input data
stream.
CLKSEL
CLKSEL
LATO
SOD
GND
SCK
CLK
Pin Connections
LATO
SID
SOD
NC
NC
SCK
CLK
SID
NC
NC
18-PIN SOIC
16-PIN DIP
1
2
3
4
5
6
7
8
9
ML2021
ML2021
TOP VIEW
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
18
17
16
15
14
13
12
11
10
www.fairchildsemi.com
V
P
V
AGND
V
V
LATI
GND
CC
DN
OUT
IN
SS
V
P
V
NC
V
NC
V
LATI
AGND
CC
OUT
IN
SS
DN
REV. 1.1.1 3/19/01

Related parts for ML2021CSX

ML2021CSX Summary of contents

Page 1

ML2021 Telephone Line Equalizer Features • Slope, height, and bandwidth adjustable • Optimized group delays (500 Hz to 6.4 kHz) • On chip anti-alias filter • Bypass mode • Low supply current 6 mA typical from ±5V supplies • TTL ...

Page 2

ML2021 Pin Description Name CLKSEL Clock select input. This pin selects the frequency of the CLK input. If CLK is 1.536 MHz, set CLKSEL = 1. If CLK is 1.544 MHz, set CLKSEL = 0. Pin has an internal pullup ...

Page 3

PRODUCT SPECIFICATION Electrical Characteristics Unless otherwise specifi MIN = 600 Ω , dBm measurements use 600 Ω as reference load, V Other Bits = 100pF 1kHz sinusoid CLK = 1.544 ...

Page 4

ML2021 Electrical Characteristics Unless otherwise specifi MIN Other Bits = 100pF 600Ω, dBm measurements use 600Ω as reference load 1kHz sinusoid CLK = 1.544 MHz ±300 Hz and ...

Page 5

PRODUCT SPECIFICATION SCK SID SOD SCK LATI LATO SOD TIMING PARAMETERS ARE REFERENCED TO THE 1.4 VOLT MIDPOINT. 12 10.5 9.0 7.5 6.0 4.5 3.0 1.5 0 –1.5 –3.0 0 500 1000 1500 2000 2500 FREQUENCY (Hz) Figure 2. Typical ...

Page 6

ML2021 12 10.5 9.0 7.5 6.0 4.5 3.0 1.5 0 –1.5 –3.0 0 500 1000 1500 2000 2500 3000 FREQUENCY (Hz) Figure 3. Typical Slope Filter Response—NL 10.5 1111 9.0 7.5 1000 6.0 4.5 0100 3.0 0010 ...

Page 7

PRODUCT SPECIFICATION Functional Description The ML2021 consists of a continuous anti-alias filter, three programmable switched capacitor equalization filters, an output smoothing filter, an output driver, and a digital section for the serial interface. Anti-Alias Filter The first section is a ...

Page 8

ML2021 Table 3. Slope Response Factors (b, S3 0000 2.371759E +03 1.116280E + 04 0001 1.985920E + 03 9.345141E + 03 0010 1.701779E + 03 8.007156E + 03 0011 1.493571E + 03 ...

Page 9

PRODUCT SPECIFICATION high. The LATI pulse must occur when SCK is low. A new data word can be loaded into the shift register without dis- turbing the existing data word in the latch. The parallel outputs of the latch control ...

Page 10

ML2021 Powerdown Mode A powerdown mode can be selected with pin the device is powered down. In this state, the power DN consumption is reduced by removing power from the analog section and forcing the analog ...

Page 11

... NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems ...

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