IDT821621J8 IDT, Integrated Device Technology Inc, IDT821621J8 Datasheet - Page 3

• Manufacturer Part Number: IDT821621J8
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT821621J8

• 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

The IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
FEATURES
FUNCTIONAL BLOCK DIAGRAM
 2003 Integrated Device Technology, Inc.
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SLIC operating states: Active, Ringing, Standby and
Disconnect
Low standby power consumption (35 mW)
−19 V to −58 V battery operation
On-hook transmission
Two-wire impedance set by single external impedance
Programmable constant-current feed
Programmable loop-detect threshold
Programmable ring-trip detect threshold
+3.3 V / +5 V compatible power supply
No −5 V supply required
On-chip Thermal Management (TMG)
Four on-chip relay drivers and relay snubbers, 1 ringing and 3
general purpose
Package available: 32 pin PLCC
B (RING)
A (TIP)
BGND
VBAT
HPA
HPB
DA
DB
LONG HAUL SLIC
Two-Wire
Interface
TMG
1
Transm ission
Power Feed
VCC
Controller
DESCRIPTION
implements the basic telephone line interface functions such as battery
feeding, impedance matching, off-hook detection and ring-trip detection.
and has the capability for driving long loops. The architecture of
operating the SLIC in different states according to different loop states
minimizes the system power dissipation.
provides a cost-effective solution for PBX and Central Office
applications.
Off-hook
Detector
Signal
The IDT821621 is a long haul Subscriber Line Interface Circuit. It
The IDT821621 allows battery feeding between −19 V and −58 V
This long haul SLIC is pin-to-pin compatible with AMD7920. It
VBREF
Ring-trip
Detector
Ring Relay Driver
Relay Driver
Relay Driver
Relay Driver
Interface
Digital
AGND
D1
D2
D3
C1
C2
DET
RD
RDC
CAS
RYOUT3
RYOUT2
RYOUT1
RINGOUT
RSN
VTX
October 8, 2003
IDT821621
DSC-6225/1