821621JG IDT, Integrated Device Technology Inc, 821621JG Datasheet - Page 5
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821621JG
Manufacturer Part Number
821621JG
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.821621JG.pdf
(21 pages)
Specifications of 821621JG
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
Compliant
Figure 1
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Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
List of Figures
Loop-Detect Threshold Setting .............................................................................................................................................................. 7
Ring-trip Detection ................................................................................................................................................................................. 8
Relay Drivers Schematic........................................................................................................................................................................ 8
DC Feeding Characteristics ................................................................................................................................................................... 8
DC Feed Programming Circuit............................................................................................................................................................... 8
Two-Wire AC Input Impedance Programming Network ....................................................................................................................... 11
Two-Wire Return Loss ......................................................................................................................................................................... 15
Longitudinal Balance............................................................................................................................................................................ 15
Four-Wire Longitudinal Signal Generation........................................................................................................................................... 16
Two-to-Four Wire Gain......................................................................................................................................................................... 16
Four-to-Two Wire Gain and Four-to-Four Wire Gain ........................................................................................................................... 17
Loop Detector Switching ...................................................................................................................................................................... 17
Basic Application Circuit....................................................................................................................................................................... 18
3
List of Figures
October 8, 2003