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Details, datasheet, quote on part number:PBL386141SHT
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Datasheet text preview:
Preliminary Information
February 2000
PBL 386 14/1 Subscriber Line Interface Circuit
Description
The PBL 386 14/1 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in ISDN Network Terminal Adapters and other short loop telecommunication equipment which often are remote powered, and by that, the available power is limited. The PBL 386 14/1 has been optimized for low total line interface cost, low power and requires a minimum of external components. The PBL 386 14/1 has constant current feed, programmable to max 30mA. The SLIC uses a first battery voltage for On-hook . A second battery voltage is used for Off-hook and must be connected, to reduce short loop power dissipation. The SLIC automatically switches between the two battery supply voltages without need for external components or external control. The loop current controls the switching between On-hook and Off-hook battery. The SLIC incorporates loop current, ground key and ring trip detection functions. The PBL 386 14/1 is compatible with loop start signalling. 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. Longitudinal voltages are suppressed by a feedback loop in the SLIC and the longitudinal balance specifications meet Bellcore TR909 requirements. The PBL 386 14/1 package is a very PCB space efficient 28-pin SSOP.
Applications
· ISDN Network terminals · Shortloop applications
Key Features
· Small footprint with SSOP package · On-hook and Off-hook battery with automatic switching, controlled by loop current · On-hook battery current is limited to 6 mA · 37 mW on-hook power dissipation in active state · Metering 0.5 Vrms (0.7 Vpeak) · Adaptive Overhead Voltage The overhead voltage follows 1VpeakRing Relay Driver
DT DR TIPX RINGX HP TS
RRLY
Ring Trip Comparator Input Decoder and Control
C1 C2 C3 VCC DET
Ground Key Detector
Two-wire Interface
Line Feed Controller and Longitudinal Signal Suppression
PSG LP REF PLC
VBAT2 VBAT
Off-hook Detector
PLD AGND VTX
BGND
VF Signal Transmission
RSN VEE (optional)
PB
61 L 38
4/1
Figure 1. Block diagram.
Package: 28-pin SSOP 1
PBL 386 14/1
Maximum Ratings
Parameter Symbol Min Max Unit
Temperature, Humidity Storage temperature range Operating temperature range Operating junction temperature range, Note 1 Power supply, 0°C TAmb +70°C VCC with respect to AGND VEE with respect to AGND VBat2 with respect to A/BGND VBat with respect to BGND, continuous VBat2 with respect to BGND, 10 ms Power dissipation Continuous power dissipation at TAmb +70°C Ground Voltage between AGND and BGND Relay Driver Ring relay supply voltage Ring relay current Ring trip comparator Input voltage Input current Digital inputs, outputs (C1, C2, C3, DET) Input voltage Output voltage (DET not active) Output current (DET) TIPX and RINGX terminals, 0°C 10 s, Note 2 TIPX or RINGX, pulse 10 s, Note 2 TIP or RING, pulse 10 s, Note 3
TStg TAmb TJ VCC VEE VBat2 VBat VBat2 PD VG
-55 -40 -40 -0.4 VBat VBat -75 -80
+150 +110 +140 6.5 0.4 0.4 0.4 0.4 0.8
°C °C °C V V V V V W V V
-5
VCC BGND +13 75 mA
VDT, VDR IDT, IDR VID VOD I OD ITIPX, IRINGX VTA, VRA VTA, VRA VTA, VRA VTA, VRA
VBat -5 -0.4 -0.4
VCC 5 VCC VCC 30
V mA V V mA
-110 VBat VBat - 20 VBat - 40 VBat - 70
+110 2 5 10 15
mA V V V V
Recommended Operating Condition
Parameter Symbol Min Max Unit
Ambient temperature VCC with respect to AGND VEE with respect to AGND VBat with respect to BGND VBat2 with respect to BGND
TAmb VCC V EE VB a t VBat2
0 4.75 VBat -58 V Bat
+70 5.25 -4.75 -10 -10
°C V V V V
Notes
1. 2. 3. The circuit includes thermal protection. Operation above max. junction temperature may degrade device reliability. 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 |-70V| and |VBat -40V|. RF1 and RF2 20 is also required. Pulse is supplied to TIP and RING outside RF1 and RF2.
2
PBL 386 14/1
Electrical Characteristics
0 °C TAmb +70 °C, VCC = +5V ±5 %, VEE = -5V ± 5%, VBat = -58V to -40V, VBat2 = -22V, RLC=18.7k (IL = 27 mA), RL = 600 , RLD = 50 k, RF1, RF2 = 0 , RRef = 15k, CHP = 68nF, CLP=0.47 µF, RT = 120 k, RRX = 120 k, Current definition: current is positive if flowing into a pin. Active state includes active normal unless otherwise specified. Battery definition: VBat = On-hook battery, VBat2 = Off-hook battery.
Ref fig
Parameter
Conditions
Min
Typ
Max
Unit
Two-wire port Overload level, VTRO Off-Hook, ILDC 10 mA On-Hook, ILDC 5 mA Metering ILDC 10 mA Input impedance, ZTR Longitudinal impedance, ZLoT, ZLoR Longitudinal current limit, ILoT, ILoR Longitudinal to metallic balance, BLM 2 Active state 1% THD, Note 1 1.0 1.0 0.7 ZT/200 20 VPeak VPeak VPeak 35 /wire mArms /wire dB dB
ZLTTX = 200 , f = 16 kHz Note 2 0 < f < 100 Hz active state 12 IEEE standard 455-1985, ZTRX = 736 0.2 kHz < f < 1.0 kHz 53 1.0 kHz < f < 3.4 kHz 53 3 active state 0.2 kHz f 1.0 kHz 1.0 kHz < f < 3.4 kHz 3 active state 0.2 kHz f 1.0 kHz 1.0 kHz < f < 3.4 kHz 4 active state 0.2 kHz < f < 3.4 kHz 40 59 59 53 53
70 70
Longitudinal to metallic balance, BLME E BLME = 20 · Log Lo VTR Longitudinal to four-wire balance, BLFE E BLFE = 20 · Log Lo VTX Metallic to longitudinal balance, BMLE V BMLE = 20 · Log TR ;ERX = 0 VLo
70 70
dB dB
70 70
dB dB
58
dB
C
Figure 2. Overload level, VTRO, two-wire port
RL VTRO ILDC
TIPX
VTX
PBL 386 14/1
RINGX RSN
RT
1 << RL, RL= 600 wC RT = 120 k, RRX = 120 k
E RX
RRX
Figure 3. Longitudinal to metallic (BLME) and Longitudinal to four-wire (BLFE) balance 1 wC << 150 , RLR = RLT = RL /2= 300
TIPX ELo C RLT V TR RLR RINGX
VTX
PBL 386 14/1
RSN
RT
V TX
RRX
RT = 120 k, RRX = 120 k
3
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