PBL3798-2 Datasheet PDF - Ericsson
| Part Number | PBL3798-2 | |
| Description | Subscriber Line Interface Circuit | |
| Manufacturers | Ericsson | |
| Logo |  |
|
|
There is a preview and PBL3798-2 download ( pdf file ) link at the bottom of this page. Total 22 Pages | ||
Preview 1 page No Preview Available !
March 1997
www.DataSheet4U.com
PBL 3798, PBL 3798/2
Subscriber Line
Interface Circuit
Description
PBL 3798 is an analog Subscriber Line Interface Circuit (SLIC), which is fabricated in
a 75 V bipolar, monolithic process.
The programmable, constant current feed circuit incorporates a switch mode
regulator to minimize on-chip power dissipation. A stand-by state further reduces idle
power dissipation, while allowing the supervisory functions to be active.
Tip-ring polarity is reversible without altering SLIC supervisory and voice frequency
(vf) functions. Tip and ring outputs can be set to high impedance states. These and
other operating states are activated via a parallel, four bit control word.
An external resistor controls the off-hook detector threshold current. A ground key
detector with internal reference reports tip/ring dc current unbalance. The ring trip
detector can operate with both balanced and unbalanced ringing systems. The three
detectors are read via a shared output.
Ring and test relay drivers with internal clamp diodes are provided.
The complex or real two-wire impedance is set by a scaled, lumped element
network.
Two- to four-wire and four- to two-wire signal conversion is provided by the SLIC in
conjunction with either a conventional or a programmable CODEC/filter.
Longitudinal line voltages are suppressed by a control loop within the SLIC.
The PBL 3798 package is 28-pin, dual-in-line; 32-pin or 44-pin j-leaded chip
carrier.
The difference between PBL 3798 and PBL 3798/2 is mainly the longitudinal
balance spec.
6/4
RINGRLY
7/5
TESTRLY
40/26
DR
38/25
DT
42/27
TIPX
34/22
HPT
35/23
HPR
43/28
RINGX
3/2
VREG
L 8/6
10/7
VBAT
GND2 2/1
Ring Relay
Driver
Test Relay
Driver
Ring Trip
Comparator
Two-wire
Interface
Input
Decoder
and
Control
Loop/Gnd key
Detector
VF Signal
Transmission
Line Feed
Controller and
Longitudinal
Suppression
Switching
Regulator
12/9 11/8 14/10
CHS VQBAT CHCLK
4/3
VCC
31/20
VEE
23/16
21/14
22/15
16/11
C1
C2
C3
C4
19/ E0
17/12
E1
20/13
DET
37/24
32/21
29/19
RD
VTX
RSN
26/17
15/
RDC
RSG
27/18
GND1
Key Features
• On-chip switch mode regulator to
minimize power dissipation
• Programmable, constant current feed
• Line feed characteristics independent
of battery variations
• Tip-ring polarity reversal function
• Tip and ring open circuit state;
tip open with ring active state
• Detectors:
- programmable loop current/ring
ground detector
- ground key detector
- ring trip detector
• Ring and test relay drivers
• Line terminating impedance, complex
or real, set by a simple external
network
• Hybrid function with conventional or
programmable CODEC/filters
• 70 dB longitudinal to metallic balance
• 79 mA peak longitudinal current
suppression
• Idle noise < 7 dBrnC; <-83 dBup
PBL 3798
Figure 1. Block diagram.
4-127 http://www.Datasheet4U.com/
|
| |
 
Parawmwewte.Dr ataSheet4U.com
2-wire return loss, r
Polarity reversal time, tpol
TIPX idle voltage, V
Ti
TIPX to RINGX idle
voltage, V
Tro
Standard version
-/2 version
4-wire Transmit Port (VTX)
Overload level, VTXO
Output offset voltage, ∆VTX
Output impedance, zTX
4-wire Receive Port (RSN)
RSN dc voltage, VRSN
RSN impedance, zRSN
RSN current (I ) to metallic
RSN
loop current (IL) gain, αRSN
Frequency Response
Two-wire to four-wire, g2-4
Four-wire to two-wire, g4-2
Four-wire to four-wire, g4-4
Insertion Loss
Two-wire to four-wire, G
2-4
Ref
fig Conditions
r = 20 • log ZL + ZTR , Note 5
ZL
-
Z
TR
0.2kHz ≤ f < 0.5kHz
0.5kHz ≤ f < 1.0kHz
1.0kHz ≤ f ≤ 3.4kHz
Normal to reversed polarity or
reversed to normal polarity
Normal polarity, stand-by
VBat = -48V
VBat = -63V, Note 6
Active and standby
V = -48V, R = open loop
Bat l
Normal polarity
Reversed polarity
Normal polarity
Reversed polarity
2 Load impedance > 20 kΩ,
f = 1 kHz, 1% THD, ERX = 0
Note 7
0.2kHz ≤ f ≤ 3.4kHz
IRSN = 0
0.2kHz ≤ f ≤ 3.4kHz
0.2kHz ≤ f ≤ 3.4kHz,
αRSN =
IL
I
RSN
6 0.3kHz ≤ f ≤ 3.4kHz
Relative to 1.0 kHz, 0 dBu
ERX = 0 V, (Notes 2, 8)
6 0.3kHz ≤ f ≤ 3.4kHz
Relative to 1.0 kHz, 0 dBu
EL = 0 V, (Notes 2, 9)
6 0.3kHz ≤ f ≤ 3.4kHz
Relative to 1.0 kHz, 0 dBu
EL = 0 V, (Notes 2, 9)
6 0 dBu, 1 kHz, E = 0
RX
(Notes 8, 10)
PBL 3798
Min Typ Max Unit
30 32
dB
25 27
dB
15 17
dB
4 15 ms
-5.0 -3.5 -2.0 V
-5.0 -3.5 -2.0 V
42 V
-42 V
40 V
-40 V
3.1 3.5
9.0 10.1
VPk
dBu
-50 ±5
10
+50 mV
20 Ω
-10 0
3
40
+10 mV
20 ohm
dB
-0.1
±0.03 +0.1
dB
-0.1
±0.03 +0.1
dB
-0.1
±0.06 +0.1
dB
-0.15 ±0.1
+0.15 dB
C
+
RL
TIPX
42/27
VTX
32/21
TX
+
VTR
EL –
ILdc PBL 3798
RINGX
43/28
RSN
29/19
RT
RRX
RX
E RX
VTX
–
Figure 6. Frequency response, insertion
loss, gain tracking, idle channel noise,
THD, inter-modulation.
1/ωC << RL, RL = 600 Ω,
RT = 60 kΩ, RRX = 30 kΩ.
4-131 http://www.Datasheet4U.com/
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for PBL3798-2 electronic component. |
| Information | Total 22 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ PBL3798-2.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| PBL3798-2 | The function is Subscriber Line Interface Circuit. Ericsson | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
PBL3
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||