APC78172 ANNEX B
APC78172DT ANNEX B. DT (DEUTSCHE TELEKOM)
APC78172
FEATURES
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APC78172 is designed to interface with Alcatel’s MTC20156 ADSL/ISDN transceiver chipset to optimize the customer
premises equipment (CPE) designs. The hybrid contains components required between the analog front end chip and
the Telco connector, including the line interface transformer, common mode choke, line protection circuitry and transmit
and receive filters.
•
•
•
•
Excludes line driver and input capacitors (see note 2)
Pin compatible with Annex A module APC78106
1500V line isolation transformer
Complies with EN60950-1:2001 (Supplementary Isolation)
ELECTRICAL SPECIFICATIONS
Passband
Frequency
Stopband
Frequency
Insertion Loss
dB max
Return Loss
dB min
Attenuation
dB min
Description
Rx Filter HPF
280 kHz to 1 MHz
0 to 276 kHz
0 to 125kHz
-10
16
-15
-15
-40
-40
Tx Filter BPF
130 kHz to 276 kHz
* Trans Hybrid loss through TX/RX > 20dB
BLOCK DIAGRAM
RX�
FILT�ER�
TIP�
AFE�
CHIP�
(EXTERNAL)�
CMC�
TFMR�
HYBRID�
RING�
TX�
FILT�ER�
APC78172�
NOTES:
ALL TRACES BETWEEN APC PINS 10 AND 14 AND ELANTEC LINE DRIVER PINS 3 AND 5 RESPECTIVELY MUST BE KEPT SYMMETRICAL, PARALLEL
AND EQUIDISTANT.
APP DIAGRAM SHOWS LOCATION OF 2 X 820pF CAPACITORS TO BE ADDED EXTERNALLY.
APC78172 APPLICATION DIAGRAM
PINS 1-2 = TNV; PINS 3-16 = SELV
Pin No.
Description
Tip
Pin No.
Description
GND
Pin No.
13
Description
1
2
7
8
N/C
Ring
RXP
14
8016 Pin 21/
EL1510C pin 5
3
4
5
6
TXN
TXP
9
RXN
15
16
17
18
8016 Pin 23/
EL1510C pin 7
10
11
12
8016 Pin 4/
EL1510C pin 3
8016 Pin 22/
EL1510C pin 6
A_GND_TX
N/C
8016 Pin 2/
EL1510C pin 1
N/C
N/C
8016 Pin 3/
EL1510C pin 2
©2003 Bel Fuse Inc. Specifications subject to change without notice. 12.10.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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