XRT83L38ES Exar, XRT83L38ES Datasheet - Page 22

• 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
POWER AND GROUND
S
IGNAL
TERSEL1
TERSEL0
S
IGNAL
TEST
TGND_0
TGND_1
TGND_2
TGND_3
TGND_4
TGND_5
TGND_6
TGND_7
ICT
N
AME
N
AME
L
EAD
U12
R11
V12
T11
L
#
EAD
E15
C17
R16
T16
D3
R3
P3
F2
T
#
YPE
I
I
I
T
****
YPE
Termination Impedance Select bit 1:
Termination Impedance Select bit 0:
In the Hardware mode and in the internal termination mode (TXTSEL=”1” and RXT-
SEL=”1”) TERSEL[1:0] control the transmit and receive termination impedance
according to the following table.
In the internal termination mode the receiver termination of each receiver is realized
completely by internal resistors or by the combination of internal and one fixed external
resistor (see description of RXRES[1:0] pins).
In the internal termination mode the transformer ratio of 1:2 or 1:2.45 and 1:1 is
required for transmitter and receiver respectively with the transmitter output AC cou-
pled to the transformer.
N
Manufacturing Test:
N
In-Circuit Testing (Active “Low”):
When this pin is tied “Low”, all output pins are forced to a high impedance state for in-
circuit testing.
Pulling RESET and ICT pins “Low” simultaneously will put the chip in factory test
mode. This condition should not be permitted during normal operation.
N
OTES
OTE
OTE
Transmitter Analog Ground for Channel _0
Transmitter Analog Ground for Channel _1
Transmitter Analog Ground for Channel _2
Transmitter Analog Ground for Channel _3
Transmitter Analog Ground for Channel _4
Transmitter Analog Ground for Channel _5
Transmitter Analog Ground for Channel _6
Transmitter Analog Ground for Channel _7
1. This pin is internally pulled “Low” with a 50kΩ resistor.
2. In Hardware mode, all channels share the same TERSEL control function.
3. In the external termination mode a 1:2 or 1:2.45 transformer ratio must be
: For normal operation this pin must be tied to ground.
: This pin is internally pulled “High” with a 50kΩ resistor.
:
used for the transmitter.
TERSEL1
19
0
0
1
1
D
TERSEL0
ESCRIPTION
D
ESCRIPTION
0
1
0
1
Termination
100Ω
110Ω
120Ω
75Ω
REV. 1.0.2