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XE0002B Schematic ( PDF Datasheet ) - Xecom

Teilenummer XE0002B
Beschreibung DAA
Hersteller Xecom
Logo Xecom Logo 




Gesamt 8 Seiten
XE0002B Datasheet, Funktion
www.DataSheet4U.com
XECOM
XE0002B
DAA with 2/4 Wire Hybrid
Description
The XE0002B Data Access Arrangement provides a
'direct connect' telephone line interface. It complies
with FCC Part 68 hazardous voltage, surge and leakage
current specifications. This component may be used as
the direct connect telephone line interface for virtually
any application in which voice or data is to be
transmitted over the public switched telephone network.
The XE0002B provides high voltage isolation,
independent on/off hook control, ring detection circuitry
and a 2 to 4 wire converter hybrid for use in modem
applications. It operated from ±5 volt power supplies
and occupies 1.25 square inches of board space.
Features
• Small Size - 1.25" x 1.0" x 0.5"
• FCC Part 68 Compliant
• Ring Detection
• 2 to 4 Wire Converter
• 1500 Volt Isolation
• 800 Volt Surge Protection
• Hookswitch Control
PIN CONFIGURATION
VDD 1 •
20 TIP
Vcc 2
RI 3
RCVR 4
17 RING
XMIT 5 (Top View)
XMFR 6
T1 7
14 N/C
OH 8
13 N/C
GND 9
12 N/C
T2 10
11 N/C
CAUTION
PINS 17 & 20 HAVE 1500V ISOLATION FROM THE REST OF
THE CIRCUITRY. THIS ISOLATION SHOULD BE
PRESERVED THROUGHOUT THE SYSTEM
Block Diagram






XE0002B Datasheet, Funktion
D.C. Electrical Specification
(Vcc=+5v ±10%, Vdd=-5v ±10%, Ta=0 to 70 deg C)
Parameter
Conditions
Min Typ Max Units
Power Supply Current Vcc
VDD
6 10 mA
4 6 mA
Transmission Gain
Gain between transmit input and
telephone line at 1800 Hz with
600 ohm termination
-0.5
0 +0.5 dB
Telephone Line
Impedance
at 1800 Hz
540 600 660 Ohms
Coupler Match
Input Impedance
Output impedance of external
531 536 541 Ohms
circuitry when T1 driven directly
to provide 600 ohm phone line
impedance match
Transhybrid Loss
Attenuation between the trans-
mitter input and receiver output
at 1kHz with 600 ohm termination
10
18
dB
Attenuation
Receive and Transmit attenuation
at 300 Hz with 600 ohm termina-
tion
0.8 3 dB
Transmit Input
Impedance
at 1800 Hz
8 10 12 KOhm
Receive Output
at 1800 Hz
10 100 Ohm
Ring Detect
Sensitivity (on hook)
Min. AC voltage between Tip &
Ring Type B ringer
38
Vrms
Loop Current Switch
Control Voltage
ON: (off hook)
OFF: (on hook)
2.0 3.0
Volts
0.5 0.8 Volts
Loop Current Switch
Control Current
1.0 2.0 mA
FCC User Instructions
RINGER EQUIVALENCE
0.9B
6/XECOM
XE0002B

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