XRT83L38ES Exar, XRT83L38ES Datasheet - Page 42

• Manufacturer Part Number: XRT83L38ES
• Description: Peripheral Drivers & Components - PCIs
• Manufacturer: Exar

Specifications of XRT83L38ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

XRT83L38
OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
RECEIVE
For N+1 redundancy, the receivers on the primary cards should be programmed for internal impedance mode.
The receivers on the backup card should be programmed for external impedance mode. Since there is no
external resistor in the circuit, the receivers on the backup card will be high impedance. Select the impedance
for the desired mode of operation, T1/E1/J1. To swap the primary card, set the backup card to internal
impedance mode, then the primary card to external impedance mode. See
diagram of the receive section for a N+1 redundancy scheme.
N
F
OTE
IGURE
Backplane Interface
: For simplification, the over voltage protection circuitry was omitted.
19. S
IMPLIFIED
RxT SEL=1, Internal
RxT SEL=1, Internal
RxT SEL=1, Internal
RxTSEL=1, External
Prim ary Card
Prim ary Card
Backup Card
Primary Card
B
LOCK
D
IAGRAM
XRT83L38
XRT83L38
XRT83L38
XRT83L38
Rx
Rx
Rx
Rx
- R
ECEIVE
S
ECTION FOR
39
Line Interface Card
N+1 R
EDUNDANCY
Figure
1:1
1:1
1:1
19. for a simplified block
T1/E1 Line
T1/E1 Line
T1/E1 Line
REV. 1.0.2