Ericsson PBL38661-2QNS, PBL38661-2QNT Datasheet

Description

The PBL 386 61/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Central Office, MUX and other telecommunications equipment. The PBL 386 61/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.

The PBL 386 61/2 emulates a transformer equivalent dc-feed, programmable between 2x25 Ω and 2x900 Ω, with short loop current limiting adjustable to max 65 mA.

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 61/2 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 line voltages are suppressed by a feedback loop in the SLIC and the longitudinal balance specifications meet Bellcore TR909 requirements.

The PBL 386 61/2 package is 28-pin PLCC.

Figure 1. Block diagram.

February 2000

PBL 386 61/2

Subscriber Line

Interface Circuit

28-pin plastic PLCC

VF Signal

Transmission

Off-hook Detector

Line Feed Controller

and

Longitudinal

Signal

Suppression

Ring Trip

Two-wire Interface

Input

Decoder and

Control

C1

C2

DET

REF

LP

VTX

RSN

DT

DR

TIPX

HP

RINGX

VCC

VEE

VBAT2

VBAT

AGND

C3

BGND

Comparator

Ground Key

Detector

Ring Relay

Driver

RRLY

PLD

PLC

PSGTS

AOV

VEE

PBL

386 61/2

Preliminary

Key Features

• Selectable overhead voltage principle – All adaptive: The overhead voltage follows 0.6 V

Peak

< signals < 6.2 V

Peak

. – Semi adaptive: The overhead voltage follows 3.1 V

Peak

< signals < 6.2 V

Peak

.

• Metering 2.2 V

rms

.

• High and low battery with automatic switching

• Battery supply as low as -10 V

• Only +5 V in addition to GND and battery (VEE optional)

• 39 mW on-hook power dissipation in active state

• Long loop battery feed tracks V

Bat

for

maximum line voltage

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

• Constant loop voltage for line leakage <5 mA

• On-hook transmission

• Full longitudinal current capability during on-hook

• Programmable loop & ring-trip detector threshold

• Analog temperature guard

1

PBL 386 61/2

2

Preliminary

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, 0°C ≤ T

Amb

≤ +70°C

V

CC

with respect to AGND V

CC

-0.4 6.5 V

V

EE

with respect to AGND V

EE

V

Bat

0.4 V

V

Bat

with respect to BGND, continuous V

Bat

-75 0.4 V

V

Bat

with respect to BGND, 10 ms V

Bat

-80 0.4 V

V

Bat2

with respect to A/BGND V

Bat2

V

Bat2

0.4 V

Power dissipation

Continuous power dissipation at T

Amb

≤ +70 °CP

D

1.5 W

Ground

Voltage between AGND and BGND V

G

-5 VCC V

Relay Driver

Ring relay supply voltage BGND +13 V Ring relay current 75 mA

Ring trip comparator

Input voltage V

DT

, V

DR

V

Bat

V

CC

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 (DET not active) V

OD

-0.4 V

CC

V

Output current (DET) I

OD

30 mA

TIPX and RINGX terminals, 0°C < T

Amb

< +70°C, V

Bat

= -50 V

TIPX or RINGX current I

TIPX

, I

RINGX

-110 +110 mA

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

TA

, V

RA

V

Bat

2V

TIPX or RINGX, pulse < 10 ms, t

Rep

> 10 s, Note 2 VTA, V

RA

V

Bat

- 20 5 V

TIPX or RINGX, pulse < 1 µs, t

Rep

> 10 s, Note 2 VTA, V

RA

V

Bat

- 40 10 V

TIP or RING, pulse < 250 ns, t

Rep

> 10 s, Note 3 VTA, V

RA

V

Bat

- 70 15 V

Recommended Operating Condition

Parameter Symbol Min Max Unit

Ambient temperature T

Amb

0 +70 °C

Maximum supplied V

CC

with respect to AGND V

CC

4.75 5.25 V

V

EE

with respect to AGND V

EE

V

Bat

-4.75 V

V

Bat

with respect to BGND V

Bat

-58 -10 V

V

Bat2

with respect to BGND V

Bat2

V

Bat

-10 V

Notes

1. The circuit includes thermal protection. Operation above max. junction temperature may degrade device reliability.

2. 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|.

3. R

F1

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

PBL 386 61/2

3

Preliminary

Electrical Characteristics

0 °C ≤ T

Amb

≤ +70 °C, VCC = +5V ±5 %, VEE = -5V ± 5%, V

Bat

= -58V to -40V, RLC=18.7kΩ, IL = 27 mA, ZL = 600 Ω, RF1, RF2 = 0 Ω,

R

Ref

= 15kΩ, CHP = 68nF, CLP=0.33 µF, RT = 120 kΩ, RSG = 24 kΩ, RRX = 120 kΩ, AOV and V

Bat2

pin not connected, 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

> 10 mA 2 Active state

1% THD, Note 1 3.1 V

Peak

On-Hook, I

LDC

≤ 5 mA 1.4 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, ZTRX = 736 Ω, active state

0.2 kHz < f < 1.0 kHz 55 dB

1.0 kHz < f < 3.4 kHz 55 dB

Longitudinal to metallic balance, B

LME

3 active state

E

Lo

B

LME

= 20 • Log 0.2 kHz ≤ f ≤ 1.0 kHz 55 dB

V

TR

1.0 kHz < f < 3.4 kHz 55 dB

Longitudinal to four-wire balance, B

LFE

3 active state

E

Lo

B

LFE

= 20 • Log 0.2 kHz ≤ f ≤ 1.0 kHz 61 dB

V

TX

1.0 kHz < f < 3.4 kHz 61 dB

Metallic to longitudinal balance, B

MLE

4 active state

VTR

0.2 kHz < f < 3.4kHz 40 dB

B

MLE

= 20 • Log

V

Lo

Figure 2. Overload level, V

TRO

, two-wire

port

1

<< RL, RL= 600 Ω ωC

RT = 120 kΩ, RRX = 120 kΩ

PBL 386 61/2

TIPX

RINGX

RSN

VTX

R

T

R

RX

E

RX

R

L

V

TRO

I

LDC

C

PBL 386 61/2

TIPX

RINGX RSN

VTX

R

T

R

RX

V

TX

R

LT

C

V

TR

R

LR

E

Lo

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 RT = 120 kΩ, RRX = 120 kΩ

PBL 386 61/2

4

Preliminary

Parameter fig Conditions Min Typ Max Unit

Four-wire to longitudinal balance, B

FLE

4 active state

E

RX

B

FLE

= 20 • Log

V

Lo

0.2 kHz < f < 3.4 kHz 40 dB

Two-wire return loss, r |Z

TR

+ ZL| r = 20 • Log |Z

TR

- ZL|

0.2 kHz < f < 0.5 kHz 25 dB

0.5 kHz < f < 1.0 kHz 27 dB

1.0 kHz < f < 3.4 kHz, Note 3 23 dB

TIPX idle voltage, V

Ti

active, IL = 0 - 1.5 V

RINGX idle voltage, V

Ri

active, IL = 0 V

Bat+

2.7 V

V

TR

active, IL = 0 V

Bat

+4.2 V

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

LDC

≥ 10 mA 5 Load impedance > 20 kΩ, 1.55 V

Peak

On hook I

LDC

≤ 5 mA 1% THD, Note 4 0.7 V

Peak

Output offset voltage, ∆V

TX

-60 60 mV

Output impedance, z

TX

0.2 kHz < f < 3.4 kHz 5 20 Ω

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

RSN

= 0 mA GND +25 mV Receive summing node (RSN) impedance 0.2 kHz < f < 3.4 kHz 10 50 Ω Receive summing node (RSN) 0.3 kHz < f < 3.4 kHz current (I

RSN

) to metallic loop current (IL) 400 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 -0.15 0.15 dB f = 8.0 kHz, 12 kHz, 16 kHz -0.5 -0.1 0 dB

Figure 4. Metallic to longitudinal and four-wire to longitudinal balance

1 << 150 Ω, R

LT

= RLR = RL /2 =300Ω

ωC RT = 120 kΩ, RRX = 120 kΩ

Figure 5. Overload level, V

TXO

, four-wire

transmit port

1 << R

L

, RL = 600 Ω

ωC R

T

= 120 kΩ, RRX = 120 kΩ

Ref

PBL 386 61/2

TIPX

RINGX RSN

VTX

R

T

R

RX

E

RX

R

LT

C

V

TR

R

LR

V

Lo

PBL 386 61/2

TIPX

RINGX RSN

VTX

R

T

R

RX

R

L

I

LDC

C

E

L

V

TXO

PBL 386 61/2

5

Preliminary

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 -0.15 0.15 dB f = 8 kHz, 12 kHz, -1.0 -0.2 0 dB 16 kHz -1.0 -0.3 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 -0.15 0.15 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

V

TR

-6.22 -6.02 -5.82 dB

Four-wire to two-wire, G

4-2

6 0 dBm, 1.0 kHz, Notes 5, 6

V

TR

G

4-2

= 20 • Log ,EL = 0

E

RX

-0.2 0.2 dB

Gain tracking

Two-wire to four-wire R

LDC

≤ 2kΩ 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 R

LDC

≤ 2kΩ 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

Noise

Idle channel noise at two-wire C-message weighting 7 12 dBrnC (TIPX-RINGX) Psophometrical weighting -85 -78 dBmp

Note 8

Harmonic distortion

Two-wire to four-wire 6 0 dBm, 1.0 kHz test signal -50 dB Four-wire to two-wire 0.3 kHz < f < 3.4 kHz -50 dB

Battery feed characteristics

Constant loop current, I

LConst

12 I

LProg

=

500

R

LC

18 < I

LProg

< 65 mA 0.92 I

LProgILProg

1.08 I

LProg

mA

Ref

Parameter fig Conditions Min Typ Max Unit

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

1 << R

L

, RL = 600 Ω

ωC RT = 120 kΩ, RRX = 120 kΩ

PBL 386 61/2

TIPX

RINGX RSN

VTX

R

T

R

RX

E

RX

R

L

V

TR

I

LDC

C

E

L

V

TX

PBL 386 61/2

6

Preliminary

Loop current detector

Programmable threshold, I

DET

I

LTh

=

500 0.9•I

LThILTh

1.1•I

LTh

mA

R

LD

Ring trip comparator

Offset voltage, ∆V

DTDR

Source resistance, RS = 0 Ω -20 0 20 mV

Input bias current, I

B

IB = (IDT + IDR)/2 -50 -20 200 nA

Input common mode range, V

DT

, V

DR

V

Bat

+1 -1 V

Ring relay driver

Saturation voltage, V

OL

IOL = 50 mA 0.5 V

Off state leakage current, I

Lk

V

OH

= 12 V 100 µA Digital inputs (C1, C2, C3)

Input low voltage, V

IL

0 0.5 V

Input high voltage, V

IH

2.5 V

CC

V

Input low current, I

IL

VIL = 0.5 -200 µA

Input high current, I

IH

VIH = 2.5 V 200 µA

Detector output (DET) Output low current, I

OL

VOL < 0.6V 0.5 1 mA

Internal pull-up resistor 10 kΩ Power dissipation (V

Bat

= -48V, V

Bat2

= -32V)

P

1

Open circuit state, C1, C2, C3 = 0, 0, 0 14 mW

P

2

@ VEE = -5V Active state, C1, C2, C3 = 0, 1, 0 39 mW

P

3

@ VEE = -48V Longitudinal current = 0 mA, IL = 0 mA 44 mW

P

4

@ VEE = -5V RL = 300Ω (off-hook) 710 mW

P

5

@ VEE = -5V RL = 800Ω (off-hook) 340 mW

Power supply currents (V

Bat

= -48V)

V

CC

current, I

CC

Open circuit state 0.8 mA

V

EE

current, I

EE

C1, C2, C3 = 0, 0, 0 -0.1 mA

V

Bat

current, I

Bat

-0.2 mA

V

CC

current, I

CC

Active state 2.0 mA

V

EE

current, I

EE

C1, C2, C3 = 0, 1, 0 0.1 mA

V

Bat

current, I

Bat

On-hook, Long Current = 0 mA, IL = 0 mA -0.7 mA

Power supply rejection ratios

V

CC

to 2- or 4-wire port Active State 28.5 35 dB

V

EE

to 2- or 4-wire port C1, C2, C3 = 0, 1, 0 28.5 55 dB

V

Bat

to 2- or 4-wire port 50 Hz < f< 3400 Hz, Vn = 100mV 28.5 40 dB

V

Bat2

to 2- or 4-wire port 28.5 60 dB

Temperature guard

Junction threshold temperature, T

JG

140 °C

Parameter fig Conditions Min Typ Max Unit

Ref