821621J8 IDT, Integrated Device Technology Inc, 821621J8 Datasheet - Page 17
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821621J8
Manufacturer Part Number
821621J8
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.821621J8.pdf
(21 pages)
Specifications of 821621J8
Number Of Channels
1
On-hook Transmission
Yes
Polarity Reversal
No
On-chip Ring Relay Driver
Yes
Operating Supply Voltage (typ)
3.3/5V
Operating Temp Range
-40C to 85C
Package Type
PLCC
Operating Temperature Classification
Industrial
Pin Count
32
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
TEST CIRCUITS
IDT821621
Test Circuits
V
Z
characteristic impedance of the line)
S
D
: The desired impedance (e.g., the
V
L
2πfC
1
R
R
<< R
C
L
Z
V
D
M
R
R
2
2
L
L
Figure 7 Two-Wire Return Loss
Figure 8 Longitudinal Balance
Longitudinal to Two-Wire Balance = 20 log (V
Longitudinal to Four-Wire Balance = 20 log (VTX / V
A (TIP)
B (RING)
Return Loss = -20 log (2 V
V
AB
SLIC
A (TIP)
B (RING)
15
AGND
RSN
VTX
SLIC
M
/ V
AGND
RSN
S
VTX
)
R
R
T1
T2
AB
/ V
L
)
L
)
C
R
R
T1
T
RX
LONG HAUL SLIC
October 8, 2003