IDT82V2048 Integrated Device Technology, Inc., IDT82V2048 Datasheet - Page 19

• Manufacturer Part Number: IDT82V2048
• Manufacturer: Integrated Device Technology, Inc.

IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
corner frequency and the shortest FIFO length that can still meet jitter
attenuation requirements.
TABLE - 8. GAP WIDTH LIMITATION
TABLE - 9. OUTPUT JITTER SPECIFICATION
TABLE - 10. TRANSFORMER SPECIFICATIONS
TABLE - 11. EXTERNAL COMPONENTS VALUES
NOTE:
1. Pulse T1124 transformer is recommended to use in Standard (STD) operating temperature range (0° to 70°C), while Pulse T1114 transformer is recommended to use in Extended
(EXT) operating temperature range is -40° to +85°C. See Transformer Specifications Table for details.
2. Typical value. Adjust for actual board parasitics to obtain optimum return loss.
3. Common decoupling capacitor for all VDDT and GNDT pins.
STD Temp. EXT Temp.
Component
T1124
D1 - D4
Cp
R
R
T
R
Part No.
AT&T Pub 62411
TR-TSY-000009
GR-253-CODE
T1114
FIFO Length
T1
9.31
64 bit
32 bit
9.5
75 Coax
Nihon Inter Electronics - EP05Q03L, 11EQS03L, EC10QS04, EC10QS03L;
Turns Ratio (Pri: sec±2%)
1%
1%
Transmit
1:2CT
R
E1
X
T
2200pf
Line
X
Line
A
B
Max. Gap Width
120 Twisted Pair
ETSI CTR 12/13
56 UI
28 UI
ITU-T G.736
ITU-T G.742
ITU-T G.783
Receive
1CT:2
9.5
Figure - 12. External Transmit/Receive Line Circuitry
15
2:1
2:1
1
1
E1
0.22 F
1%
1%
Electrical Specification @ 25 °C
Cp
OCL @ 25°C (mH MIN)
Transmit
2
R
R
R
T
1k
1k
R
1.2
R
R
T
VDDT
100
VDDT
D2
D1
D4
D3
Receive
19
1.2
·
·
Twisted Pair VDDT = 5.0V
LINE INTERFACE CIRCUITRY
connections provide a matched interface to the cable. Figure-12 shows
the appropriate external components to connect with the cable for one
transmit/receive channel. Table-11 summarizes the component values
based on the specific application.
TRANSMIT DRIVER POWER SUPPLY
lines are driven through 9.5
9.1
driven through a 1:2 transformer. To optimize the power consumption of
the device, series resistors are removed in this case.
improve the transmit return loss performance and protect the device
from surges coupling into the device.
RTIPn
RRINGn
TTIPn
TRINGn
One of Eight Identical Channels
The transmit and receive interface RTIP/RRING and TTIP/TRING
All transmit driver power supplies must be 5.0V or 3.3V.
In E1 mode, despite of the power supply voltage, the 75 /120
In T1 mode, when 5.0V is selected, 100
However, in harsh cable environment, series resistors are required to
12.4
9.1
series resistors and a 1:2 transformer. When 3.3V, 100
Transmit
.6
L
1%
1%
L
(µH MAX)
Receive
.6
VDDDn
GNDTn
T1
INDUSTRIAL TEMPERATURE RANGES
1000pf
series resistors and a 1:2 transformer.
Transmit
0.1 F
C
100
35
W/W
Motorola - MBR0540T1
VDDT
(pF MAX)
Twisted Pair VDDT = 3.3V
Receive
12.4
35
68 F
lines are driven through
0
3
1%
Schematic
Package/
TOU/3
lines are