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Details, datasheet, quote on part number:PBL3860A
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Datasheet text preview:
May 1997
PBL 3860A/1, PBL 3860A/6 Subscriber Line Interface Circuit
Description
Note: All data is also valid for PBL 3860A/6, except maximum ratings for battery voltage. (See next page) The PBL 3860A/1 Subscriber Line Interface Circuit (SLIC) is a bipolar integrated circuit in 90 V technology which replaces the conventional transformer based analog line interface circuit in DAML, FITL, PABX and other telecommunications equipment with a modern, compact solid state design. Not only is required PCB area reduced, but lesser component weight and height result as well. The PBL 3860A/1 has been optimized for low cost and to require only a minimum of external components. The PBL 3860A/1 programmable, constant-current feed system can operate with battery supply voltages down to 21 V to reduce line card power dissipation. The SLIC incorporates loop current and ring trip detection functions as well as a ring relay driver. Two-to four-wire and four- to two-wire voice frequency (vf) signal conversion is accomplished by the SLIC in conjunction with either a conventional CODEC/filter or with a programmable CODEC/filter (e.g. SLAC, SiCoFi, Combo II). The programmable line terminating impedance could be complex or real to fit every market. The PBL 3860A/1 and 3860A/6 package is 28-pin PLCC.
Key Features
· Battery feed characteristics programmable via external resistors; feed characteristics independent of SLIC battery supply variations · Battery supply voltage as low as 21 V for power efficient line card designs · Ring relay driver · Loop current and ring trip detection functions · Programmable loop current detector threshold · Hybrid function with all types of CODEC/filter devices · Programmable line terminating impedance, complex or real · On-hook transmission · Low 35 mW @-24 V on-hook power dissipation · Tip-ring open circuit state for subscriber loop power denial · -40 °C to +85 °C ambient temperature range · -85 V battery supply voltage for ring applications (PBL 3860A/6)
Ring Relay Driver
DT DR TIIPX HPR HPT RINGX VCC VEE VB AT AGND BGND 23 25 27 21 20 28 4 18 3, 6, 10, 17, 24 15 2
5
RINGRLY
13
C1
Ring Trip Detector
12 C2
Input Decoder and Control
9
E0
11
DET
Two-wire Interface
Line Feed Controller and Longitudinal Signal Suppression
L B /1 PA
38
60
14 17
RDC RSG
Of f-hook Detector
22 19
RD VTX RSN
VF Signal Transmission
28-pin PLCC
16
Figure 1. Block diagram.
4-1
PBL 3860A/1
Maximum Ratings
Parameter Symbol Min Max Unit
Temperature Storage temperature range Operating junction temperature range Power supply, -40°C TAmb 85°C VCC with respect to AGND VEE with respect to AGND VBat with respect to BGND for PBL3860A/1 VBat with respect to BGND for PBL3860A/6 Power dissipation Continuous power dissipation at TAmb 70 °C Peak power dissipation at TAmb = 70 °C, t 1 sec. Ground Voltage between AGND and BGND Relay driver Ring relay supply voltage, Note 4 Ring relay current Ring trip comparator Input voltage Input current Digital inputs, outputs (C1, C2, E0, DET) Input voltage Output voltage (DET disabled) Input current (DET enabled) TIPX and RINGX terminals, -40°C TAmb 85°C, VBat = -50V TIPX or RINGX voltage, continuous (referenced to AGND), Note 1 TIPX or RINGX, pulse 10 s, Note 1 TIPX or RINGX, pulse 10 s, Note 1 TIP or RING, pulse 10 s, Note 2 TIPX or RINGX current
TStg TJ VCC VEE VBat VBat PD PDP VG V Ring IRing VDT, VDR IDT, IDR VID VOD IOD VTA, VRA VTA, VRA VTA, VRA VTA, VRA ILT, ILR
-60 -40 -0.5 -6.5 -70 -85
+150 +140 6.5 0.5 VEE + 0.6 VEE + 0.6 1.5 4
°C °C V V V V W W V V mA V mA V V mA V V V V mA
-0.3 0
0.3 12 50 0 5 VCC VCC 5
VBat -5 0 0
VBat VBat - 20 VBat - 40 VBat - 70
2 5 10 15 70
Recommended Operating Conditions
Parameter Symbol Min Max Unit
VCC with respect to AGND VEE with respect to AGND VBat with respect to BGND, Note 3
VCC VEE VBat
4.75 -5.25 -58
5.25 -4.75 -24
V V V
Notes
1. 2. 3. 4.
A diode in series with the VBat input increases the permitted continuous voltage and pulse < 10 ms to -85 V. A pulse 1µs is increased to the greater of |-70 V| and |VBat - 40V|. RF1, RF2 20 is also required. Pulse is supplied to TIP and RING outside RF1, RF2. -24V 4-2
PBL 3860A/1
Electrical Characteristics
-40 °C TAmb 85 °C, Note 10, VCC = +5 V ±5%, VEE = -5 V ±5%, VBat = -48 V, AGND=BGND, RDC1 = RDC2 = 41.7 k, CHP = 10 nF, CDC = 1.5 µF, ZL = 600 , unless otherwise specified.
Parameter Ref fig Conditions Min Typ Max Unit
Two-wire port Overload level, VTRO Input impedance, ZTR Longitudinal impedance, ZLoT, ZLoR Longitudinal current limit, ILoT, ILoR Longitudinal to metallic balance, BLM
2
ZL = 600 , 1% THD Note 1 Note 2 0 < f < 100 Hz active state stand-by state IEEE standard 455-1985 0.2 kHz f 3.4 kHz 0 °C TAmb 70 °C -40 °C TAmb 85 °C 0.2 kHz f 3.4 kHz E BLME = 20 · Log Lo VTR 0 °C TAmb 70 °C -40 °C TAmb 85 °C
3.1 10 20 5 35
VPeak /wire mArms/wire mArms/wire
53
63 58
dB dB
Longitudinal to metallic balance, BLME
3
53
63 58
dB dB
Longitudinal to four-wire balance, BLFE
3
0.2 kHz f 3.4 kHz E BLFE = 20 · Log Lo VTX 0 °C TAmb 70 °C -40 °C TAmb 85 °C 63 58 55 dB dB dB
53 50
Metallic to longitudinal balance, BMLE
4
0.2 kHz < f < 3.4 kHz E BMLE = 20 · Log TR ,ERX = 0 VLo
C
TIPX 27
VTX 19
Figure 2. Overload level, VTRO, two-wire port
<< RL, RL= 600 C RT = 600 k, RRX = 300 k 1
RL
V TRO
I Ldc
PBL 3860A/1
RINGX 28 RSN 16
RT
E RX
RRX
Figure 3. Longitudinal to metallic (BLME) and Longitudinal to four-wire (BLFE) balance
1 << 150 , R = R = 300 LT LR C
E LO
C
RLT V TR RLR
TIPX 27
VTX 19
PBL 3860A/1
RINGX 28 RSN 16
RT
V TX
RRX
4-3
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