Ericsson PBL38630-2QNS, PBL38630-2QNT, PBL38630-2SHT, PBL38630-2SOS, PBL38630-2SOT Datasheet

Description

The PBL 386 30/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Digital Loop Carrier, FITL and other telecommunications equipment. The PBL 386 30/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.

The PBL 386 30/2 emulates resistive loop feed, programmable between 2x50 Ω and 2x900 Ω, with short loop current limiting adjustable to max 45 mA. In the current limited region the loop feed is nearly constant current with a slight slope corresponding to 2x30kΩ.

A second lower battery voltage may be connected to the device 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 SLIC incorporates loop current and ring trip detection functions. The PBL 386 30/2 is compatible with loop start signaling.

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 two-wire impendance, complex or real, is set by a simple external network.

Longitudinal voltages are suppressed by a feedback loop in the SLIC and the longitudinal balance specifications meet the DLC requirements.

The PBL 386 30/2 package options are 24-pin SSOP, 24-pin SOIC and 28-pin PLCC.

Figure 1. Block diagram.

March 2000

PBL 386 30/2

Subscriber Line

Interface Circuit

Key Features

• 24-pin SSOP package

• High and low battery supply with automatic switching

• 65 mW on-hook power dissipation in active state

• On-hook transmission

• Long loop battery feed tracks Vbat for maximum line voltage

• Only +5 V feed in addition to battery

• Selectable transmit gain (1x or 0.5x)

• No power-up sequence

• Programmable signal headroom

• 43V open loop voltage @ -48V battery feed

• Constant loop voltage for line leakage <5 mA (RLeak ~ >10 kΩ @ -48V)

• Full longitudinal current capability during on-hook state

• Analog over temperature protection permits transmission while the protection circuit is active

• Integrated Ring Relay Driver

• -40°C to +85°C ambient temperature range

24-pin SOIC, 24-pin SSOP, 28-pin PLCC

1

RRLY

C1

C2

DET

PSG

REF

LP

PLD

PLC

VTX

RSN

PTG

BGND

AGND

VBAT

VBAT2

VCC

HP

RINGX

TIPX

DR

DT

Ring Relay

Driver

Input

Decoder

and

Control

Ring Trip

Comparator

Line Feed Controller

and

Longitudinal

Signal

Suppression

Off-hook Detector

VF Signal

Transmission

Two-wire Interface

POV

PBL 386 30/2

PBL

38630/2

PBL 386 30/2

2

Maximum Ratings

Parameter Symbol Min Max Unit

Temperature, Humidity

Storage temperature range

T

Stg

-55 +150 °C

Operating temperature range

T

Amb

-40 +110 °C

Operating junction temperature range, Note 1

T

J

-40 +140 °C

Power supply, -40 °C ≤ T

Amb

≤ +85 °C

V

CC

with respect to A/BGND V

CC

-0.4 6.5 V

V

Bat2

with respect to A/BGND V

Bat2

V

Bat

0.4 V

V

Bat

with respect to A/BGND, continuous V

Bat

-75 0.4 V

V

Bat

with respect to A/BGND, 10 ms V

Bat

-80 0.4 V

Power dissipation

Continuous power dissipation at T

Amb

≤ +85 °CP

D

1.5 W

Ground

Voltage between AGND and BGND V

G

-0.3 0.3 V

Relay Driver

Ring relay supply voltage BGND+14 V

Ring trip comparator

Input voltage V

DT

, V

DR

V

Bat

AGND V

Input current I

DT

, I

DR

-5 5 mA

Digital inputs, outputs (C1, C2, DET) Input voltage V

ID

-0.4 V

CC

V

Output voltage V

OD

-0.4 V

CC

V

TIPX and RINGX terminals, -40°C < T

Amb

< +85°C, V

Bat

= -50V

Maximum supplied TIPX or RINGX current I

TIPX

, I

RINGX

-100 +100 mA

TIPX or RINGX voltage, continuous (referenced to AGND), Note 2 VTA, V

RA

-80 2 V

TIPX or RINGX, pulse < 10 ms, t

Rep

> 10 s, Note 2 VTA, V

RA

V

Bat

-10 5 V

TIPX or RINGX, pulse < 1 µs, t

Rep

> 10 s, Note 2 VTA, V

RA

V

Bat

-25 10 V

TIPX or RINGX, pulse < 250 ns, t

Rep

> 10 s, Notes 2 & 3 VTA, V

RA

V

Bat

-35 15 V

Recommended Operating Condition

Parameter Symbol Min Max Unit

Ambient temperature T

Amb

-40 +85 °C

V

CC

with respect to AGND V

CC

4.75 5.25 V

V

Bat

with respect to AGND V

Bat

-58 -8 V

AGND with respect to BGND V

G

-100 100 mV

Notes

1. The circuit includes thermal protection. Operation at or above 140°C junction temperature may degrade device reliability.

2. With the diodes DVB and D

VB2

included, see figure 11.

3. R

F1

and RF2 ≥ 20 Ω is also required. Pulse is applied to TIP and RING outside RF1 and RF2.

PBL 386 30/2

3

V

TX

Electrical Characteristics

-40 °C ≤ T

Amb

≤ +85 °C, PTG = open (see pin description), VCC = +5V ±5 %, V

Bat

= -58V to -40V, V

Bat2

= -32 V, RLC=32.4 kΩ,

I

L

= 27 mA. RL = 600 Ω, RF1= RF2 = 0, R

Ref

= 49.9 kΩ, CHP = 47 nF, CLP=0.15 µF, RT = 120 kΩ, RSG = 0 kΩ, RRX = 60 kΩ,

R

= 52.3 kΩ ROV = ∞, unless otherwise specified. Current definition: current is positive if flowing into a pin.

Ref

Parameter fig Conditions Min Typ Max Unit

Two-wire port

Overload level, V

TRO ,ILdc

> 18mA 2 Active state,

1% THD, R

OV

= ∞ 2.7 V

Peak

On-Hook, I

Ldc

< 5mA Note 1 1.1 V

Peak

Input impedance, Z

TR

Note 2 ZT/200

Longitudinal impedance, Z

LOT

, Z

LOR

0 < f < 100 Hz 20 35 Ω/wire

Longitudinal current limit, I

LOT

, I

LOR

active state 28 mA

rms

/wire

Longitudinal to metallic balance, B

LM

IEEE standard 455-1985, Z

TRX

=736Ω

0.2 kHz < f < 1.0 kHz, T

amb

0-70°C63 66 dB

1.0 kHz < f < 3.4 kHz, T

amb

0-70°C60 66 dB

0.2 kHz < f < 1.0 kHz, T

amb

-40-85°C60 66 dB

1.0 kHz < f < 3.4 kHz, T

amb

-40-85°C55 66 dB

Longitudinal to metallic balance, B

LME

3

Longitudinal to four wire balance B

LFE

3 0.2 kHz < f < 1.0 kHz, T

amb

0-70°C63 66 dB

1.0 kHz < f < 3.4 kHz, T

amb

0-70°C60 66 dB

0.2 kHz ≤ f ≤ 1.0 kHz, T

amb

-40-85°C60 66 dB

1.0 kHz < f < 3.4 kHz, T

amb

-40-85°C55 66 dB

Metallic to longitudinal balance, B

MLE

4 0.2 kHz < f < 3.4 kHz 40 50 dB

VTR

B

MLE

= 20 · Log ; ERX = 0

V

LO

Figure 2. Overload level, V

TRO

, two-wire

port

1 << R

L

, RL= 600 Ω

ωC R

T

= 120 kΩ, RRX = 60 kΩ

Figure 3. Longitudinal to metallic (B

LME

)

and Longitudinal to four-wire (B

LFE

)

balance

1

<< 150 Ω, R

LR =RLT

=RL /2=300Ω

ωC R

T

= 120 kΩ, RRX = 60 kΩ

B

LME

= 20 · Log

B

LFE

= 20 · Log

V

TR

E

Lo

E

Lo

PBL 386 30/2

TIPX

RINGX

RSN

VTX

R

T

R

RX

E

RX

R

L

V

TRO

I

LDC

C

PBL 386 30/2

TIPX

RINGX RSN

VTX

R

T

R

RX

V

TX

R

LT

C

V

TR

R

LR

E

Lo

PBL 386 30/2

4

Parameter fig Conditions Min Typ Max Unit

Four-wire to longitudinal balance, B

FLE

4 0.2 kHz < f < 3.4 kHz 40 50 dB

E

RX

B

FLE

= 20 · Log

V

Lo

Two-wire return loss, r |ZTR + ZL|

r = 20 · Log

|Z

TR

- ZL|

0.2 kHz < f < 1.0 kHz 30 35 dB

1.0 kHz < f < 3.4 kHz, Note 3 20 22 dB

TIPX idle voltage, V

Ti

active, IL < 5 mA - 1.3 V

RINGX idle voltage, V

Ri

active, IL < 5 mA V

Bat

+3.0 V

V

TR

active, IL < 5 mA V

Bat

+4.3 V

Four-wire transmit port (VTX) Overload level, V

TXO

, IL > 18mA 5 Load impedance > 20 kΩ, 2.7 V

Peak

1% THD, Note 4

On-hook, I

L

< 5mA 1.1 V

Peak

Output offset voltage, ∆V

TX

-100 0 100 mV

Output impedance, z

TX

0.2 kHz < f < 3.4 kHz 15 50 Ω

Four-wire receive port (RSN) Receive summing node (RSN) DC voltage I

RSN

= -55 µA 1.15 1.25 1.35 V Receive summing node (RSN) impedance 0.2 kHz < f < 3.4 kHz 8 20 Ω Receive summing node (RSN) 0.3 kHz < f < 3.4 kHz current (I

RSN

) to metallic loop current (IL) 200 ratio

gain,α

RSN

Frequency response

Two-wire to four-wire, g

2-4

6 relative to 0 dBm, 1.0 kHz. ERX = 0 V

0.3 kHz < f < 3.4 kHz -0.20 0.10 dB f = 8.0 kHz, 12 kHz, 16 kHz -1.0 0.1 dB

Figure 4. Metallic to longitudinal and fourwire to longitudinal balance

1 << 150 Ω, R

LT

= RLR = RL /2 =300Ω

ωC R

T

= 120 kΩ, RRX = 60 kΩ

Figure 5. Overload level, V

TXO

, four-wire

transmit port

1 << R

L

, RL = 600 Ω

ωC R

T

= 120 kΩ, RRX = 60 kΩ

Ref

PBL 386 30/2

TIPX

RINGX RSN

VTX

R

T

R

RX

R

L

I

LDC

C

E

L

V

TXO

PBL 386 30/2

TIPX

RINGX RSN

VTX

R

T

R

RX

E

RX

R

LT

C

V

TR

R

LR

V

Lo

PBL 386 30/2

5

Four-wire to two-wire, g

4-2

6 relative to 0 dBm, 1.0 kHz. EL=0 V

0.3 kHz < f < 3.4 kHz -0.2 0.1 dB f = 8 kHz, 12 kHz, -1.0 0 dB 16 kHz -2.0 0 dB

Four-wire to four-wire, g

4-4

6 relative to 0 dBm, 1.0 kHz, EL=0 V

0.3 kHz < f < 3.4 kHz -0.2 0.1 dB

Insertion loss

Two-wire to four-wire, G

2-4

6 0 dBm, 1.0 kHz, Note 5

V

TX

G

2-4

= 20 · Log ; ERX = 0 -0.2 0.2 dB

V

TR

PTG = AGND -6.22 -6.02 -5.82 dB

Four-wire to two-wire, G

4-2

6 0 dBm, 1.0 kHz, Note 6

V

TR

G

4-2

= 20 · Log ; EL = 0 -0.2 0.2 dB

E

RX

Gain tracking

Two-wire to four-wire 6 Ref. -10 dBm, 1.0 kHz, Note 7

-40 dBm to +3 dBm -0.1 0.1 dB

-55 dBm to -40 dBm -0.2 0.2 dB

Four-wire to two-wire 6 Ref. -10 dBm , 1.0 kHz

-40 dBm to +3 dBm -0.1 0.1 dB

-55 dBm to -40 dBm -0.2 0.2 dB

Noise

Idle channel noise at two-wire C-message weighting 12 dBrnC (TIPX-RINGX) or four-wire (VTX) output Psophometrical weighting -78 dBmp

Note 8

Harmonic distortion

Two-wire to four-wire 6 0 dBm -67 -50 dB Four-wire to two-wire 0.3 kHz < f < 3.4 kHz -67 -50 dB

Battery feed characteristics

Loop current, I

L

, in the current 12 18mA ≤ IL ≤ 45 mA 0.92 I

L

I

L

1.08 ILmA

limited region, reference A, B & C Open circuit state loop current, I

LOC

RL = 0Ω -100 0 100 µA

Ref

Parameter fig Conditions Min Typ Max Unit

Figure 6. Frequency response, insertion loss, gain tracking.

1 << R

L

, RL = 600 kΩ

ωC

R

T

= 120 kΩ, RRX = 60 kΩ

PBL 386 30/2

TIPX

RINGX RSN

VTX

R

T

R

RX

E

RX

R

L

V

TR

I

LDC

C

E

L

V

TX