xe0020 ETC-unknow, xe0020 Datasheet - Page 3

• Manufacturer Part Number: xe0020
• Description: Telephone Line Interface With Active Line Monitoring
• Manufacturer: ETC-unknow

Pin Descriptions
XE0020/XE0020C Typical Connection Diagram
Recommended Parts
Pin
XECOM
10
6
7
8
9
Designation
FB1, FB2
Z1, Z2
C2,C3
MOV1
Name
C1
VCC
HInt
/CD
/RI
T2
Data Pump
Off Hook
Controller
Modem
TXA1
TXA2
RXA
Ring
Description
VCC provides the + 5 volt power source for the XE0020.
T2 connects directly to the secondary side of the XE0020"s internal telephone line
transformer.
Ring Indicate, output, active low, TTL, RI provides a ring frequency pulse train representation.
An external 56K pull-up resistor is required to correctly bias the ring indicate output.
Handset Interrupt is an active high output from the modem. HInt goes high for one second if
an extension telephone is picked-up while the DAA has control of the line. When the host
sees HInt go high, it should immediately lower OH to disconnect the XE0020 or XE0020C
from the telephone line.
Connect Detect, output, active low, TTL. /CD indicates that the XE0020 is connected to the
telephone line and the telephone line is not in use.
Description
.01 Microfarad
47 pico farad, 3000 volts
Zener Diode, 4.3 volts
Ferrite Beads (TDK Part Number CCB30-453215B)
Minimum Breakover 220 volts (Teccor Electronics Part Number P2600BA70)
continued
340 ohms
Z1
Z2
56K
+5 Volts
C1
VCC
/RI
T1
T2
OH
Gnd
HInt
/CD
(3)
Ring
Tip
15 Ohms 1/2 W
15 Ohms 1/2 W
MOV1
FB1
FB2
C2
C3
4
3
RJ11
XE0020