xe056lcc Xecom, Inc, xe056lcc Datasheet

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xe056lcc

Manufacturer Part Number
xe056lcc
Description
Surface-mount Slim-link Daa For 56k Bps Data Transfer
Manufacturer
Xecom, Inc
Datasheet
Description
The XE056LCC is a complete telephone line
interface or DAA supporting 56K bps data transfer
in a leadless, surface-mount package. It is an
alternative to discrete DAA’s for high-speed dial-
up communications. The XE056LCC replaces 25
to 30 discrete components.
In spite of being less than 1 inch square, the
XE056LCC does not sacrifice performance for its
small size and surface-mount convenience. The
wide bandwidth, low distortion design supports
data transfer with even V.90 and V.92 modulation.
The XE056LCC includes the telephone line
transformer, loop current holding circuit, hook-
switch and ring indicator. The XE056LCC
complies with FCC Part 68 rules for direct
connection to the telephone line.
XECOM
/OH
T1
T2
RI
Surface-Mount Slim-Link
former
Trans-
XE056LCC BLOCK DIAGRAM
Curre nt
Holding
Circuit
Loop
®
DAA for 56K bps Data Transfer
(1)
Features
* Leadless design compatible with a 68-Pin
* Meets line interface requirements for reliable
* Typical Total Harmonic Distortion -77 dB ;
* FCC Part 68 Compliant;
* Integrated Low-Distortion Telephone Line
* Ring Detection;
* Operates on a Single +5 Volt or + 3 Volt
* Solid-State Hook-switch Control;
* Internal metallic surge protection provided;
* Extended Temperature Ranges available;
PLCC footprint for high-volume assembly
voice, audio and data communications;
Transformer
Power Supply;
Hook-Switch
Ring Detect
MOV
XE056LCC
XE056LCC
Tip
Ring
February 2005

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xe056lcc Summary of contents

Page 1

... Surface-Mount Slim-Link Description The XE056LCC is a complete telephone line interface or DAA supporting 56K bps data transfer in a leadless, surface-mount package alternative to discrete DAA’s for high-speed dial- up communications. The XE056LCC replaces discrete components. In spite of being less than 1 inch square, the XE056LCC does not sacrifice performance for its small size and surface-mount convenience ...

Page 2

... XE056LCC Mechanical Specifications Inches Dim Min Max A 0.945 0.955 B 0.945 0.955 C 0.340 0.350 D 0.095 0.105 E 0.795 0.805 F 0.070 0.080 G 0.095 0.105 XECOM C MM Min Max 24.00 24.26 24.00 24.26 8.64 8.89 2.41 2.67 20.19 20.45 1.90 2.03 2.41 2.67 G (2) Top Bottom G XE056LCC E ...

Page 3

... XE056LCC PCB Layout Recommendations The XE056LCC is a leadless part. The pads on your printed circuit board must align with the pads on the bottom of the DAA mdule. Below is the recommended PCB layout. Do not place trace or components under the DAA as this could compromise the network isolation. ...

Page 4

... Ground connection to the XE056LCC. Pin 10 supplies the reference for the RI input and /OH output and should connect to the systems digital ground. 11 VCC + Volt power source for the XE056LCC. VCC powers the RI and OH control lines. 12 /OH Active low Switch-hook control. A low on /OH closes the switch-hook causing the DAA to seize the local telephone line ...

Page 5

... ACB2012L-120 which provides more than 100 ohms impedance above 100 MHz. XECOM XECOM 14 T2 XE056LCC 12 /OH 11 VCC 10 Gnd 3.3 V (5) GPIO0 GPIO1 140 Ω TXAP TDK 140 Ω TXAN 73M1903 0.15 µFd 0.15 µFd Analog 58K Ω 58K Ω Front-End RXAP 42K Ω RXA N 42K Ω XE056LCC ...

Page 6

... Slim-Link PLCC Soldering Instructions Because of its Hybrid construction, the XE056LCC DAA is subject to damage if over exposed to heat during solder reflow operations. Following the soldering instructions below will ensure that the process of soldering the module to the board does not damage the DAA. ...

Page 7

... Insertion Loss: There is some loss of signal strength as the signal passes through the DAA. This "insertion" loss should be considered when placing signals across T1 and T2 for transmission. The typical insertion loss of the XE056LCC is 6 dB. Total Harmonic Distortion: Total harmonic distortion measures the quality of the DAA signal path quality ...

Page 8

... The 2/4 wire convertor separates these signals at the host interface. Most modem analog front end chips incorporate an internal 2/4 wire convertor. If you are using the XE056LCC for an application other than a modem, such as audio, or your modem analog front end does not provide the 2/4 wire convertor, you will need to provide a discrete 2/4 wire convertor ...

Page 9

... Voltage (active low) Hook-Switch Control Current Loop Current DC On-Hook Impedance XE056LCC Absolute Maximum Ratings Operating Temperature Range * * The XE056LCC can be ordered with an Operating Temperature of -40 Order Model Number XE056LCC-ITR XECOM (Vcc=+5v ±10%, Ta deg C) Conditions Off-hook On-hook 600 Ohm Impedance, 1800 Hz ...

Page 10

... Billing Delay A delay of 2 seconds or greater is required after the time the XE056LCC is taken “off hook” and before any information is transmitted. This is required to ensure that billing information may be exchanged between telephone company central offices without interference. ...

Page 11

... Xecom reserves the right to modify specifica- tions and/or prices without notice. Product mentioned herein are used for identification purposes only and may be trademarks and/or registered trademarks of their respective companies. XECOM Xecom Incorporated 374 Turquoise Street, Milpitas, CA 95035 Ph:408-942-2200 Fax:408-942-1346 Email: info@xecom.com Web Site: http://www.xecom.com (11) XE056LCC ...

Page 12

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