PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
Figure 6
- External Analog Receive Interface Circuit
V
DD
RAVD
RXTIP
R1
1:N
T
R2
R
RXRING
RC
0.1 µF
± 10%
RAVS
47 nF
±10%
316 kΩ ±1%
Notes:
1. All capacitors ceramic
2. Some transformer manufacturers produce a dual part containing both the 1:2 & 1:1.36
transformers required for the receive and transmit interfaces, respectively.
The transformer used should be designed for use in T1/CEPT/ISDN-PRI
applications. Many manufacturers have standard products for these applications.
Typical characteristics of a suitable transformer are given in the following table.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
33
PMC [ PMC-SIERRA, INC ]
