Motorola TCA3388DP, TCA3388FP Datasheet

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The TCA3388 is a telephone line interface circuit which performs the basic functions of a telephone set in combination with a microcontroller and a ringer. It includes dc and ac line termination, the hybrid function with 2 adjustable sidetone networks, handset connections and an efficient supply point.

FEATURES

Line Driver and Supply

• DC and AC Termination of the Telephone Line

• Selectable DC Mask: France, U.K., Low Voltage

• Current Protection

• Adjustable Set Impedance for Resistive and Complex Termination

• Efficient Supply Point for Peripherals

• Hook Status Detection

Handset Operation

• Transmit and Receive Amplifiers

• Double Anti–Sidetone Network

• Line Length AGC

• Microphone and Earpiece Mute

• Transmit Amplifier Soft Clipping

Dialing and Ringing

• Interrupter Driver for Pulse–Dialing

• Reduced Current Consumption During Pulse–Dialing

• DTMF Interfacing

• Ringing via External Ringer

TELEPHONE LINE

INTERFACE

SEMICONDUCTOR

TECHNICAL DATA

20

1

DP SUFFIX

PLASTIC PACKAGE

CASE 738

20

1

FP SUFFIX

PLASTIC PACKAGE

CASE 751D

PIN CONNECTIONS

Application Areas

• Corded Telephony

• Cordless Telephony Base Station

• Answering Machines

• Fax

• Intercom

• Modem

This document contains information on a new product. Specifications and information herein are subject to change without notice.

MOTOROLA ANALOG IC DEVICE DATA

120

RXI

2

TXI

3

Mic

4

LAO

5

LAI

6

HYL

7

HYS

8

CM

9

IMP

SAO SAI

ORDERING INFORMATION

Device

TCA3388DP TCA3388FP

 Motorola, Inc. 1995

Temperature Range

(Top View)

Tested Operating

TA = 0° to +70°C

19 18 17 16 15 14 13 12 1110

RXO2 RXO1 Gnd V

CC

I

ref

MUT PI HSO

DCM

Package

DIP

SOIC

1

TCA3388

ÁÁÁ

ÁÁÁ ÁÁÁ

ÁÁÁ

Simplified Block Diagram

DC and AC Termination

Line +

Handset

Earpiece

Handset

MIcrophone

Ear

Mic

DC Mask Generation

AC Termination

2–4 Wire Conversion

Microcontroller

Interface

This device contains 1,911 active transistors.

MAXIMUM RATINGS

Rating Symbol Min Max Unit

Maximum Junction Temperature T Storage Temperature Range T

NOTE: Devices should not be operated at or outside these values. The “Recommended Operating

Limits” provide for actual device operation.

J

stg

– +150 °C

–65 +150 °C

RECOMMENDED OPERATING CONDITIONS

Characteristic Symbol Min Typ Max Unit

Operating Temperature Range T

A

0 – +70 °C

Supply

Stabilizer

Line Driver

Line –

DC ELECTRICAL CHARACTERISTICS (T

Characteristic

= 25°C)

A

Symbol Min Typ Max Unit

VOLTAGE REGULATOR

Regulated Supply at Pin 17 V

CC

ICC = 7.0 mA 3.4 3.7 4.0 ICC = 20 mA 3.45 3.75 4.05

ICC = 80 mA 3.5 3.8 4.1

Current Consumption at Pin 17, Pin PI = High I

CC

– – 600 µA

DRIVER DC CHARACTERISTICS

Available Current at LAO

I4 Source Current 45 70 100 Sink Current –100 –70 –45

Amplifier A8 Driver Slope LAO Voltage (PI = High, I4 = 100 µA) Internal Offset (Pins 5 to 10)

S8

V

LAO

VO1–VO2

0.7

30

1.0

–

80

SPEECH AMPLIFIERS

IMP Voltage (Pin 9, Closed Loop) Earpiece Amplifier DC Bias (R

= 100 kΩ)

ext

RXI, Pin 1 V RXO1 Pin 19 V RXO2, Pin 20 V Offset (V

RXO1

– V

) V

RXO2

V

IMP

RXI RXO1 RXO2 Offset

–

1.6

– 1.6 – – 1.7 – – 1.45 – – 0.25 0.70

1.2 270 140

–

Vdc

µA

µA/mV

mV mV

Vdc Vdc

2

MOTOROLA ANALOG IC DEVICE DATA

TCA3388

ÁÁÁ

ÁÁÁ ÁÁÁ

ÁÁÁ

DC ELECTRICAL CHARACTERISTICS (continued) (T

= 25°C)

A

Characteristic UnitMaxTypMinSymbol

SPEECH AMPLIFIERS

HYL and HYS DC Bias Voltage

Normal Mode V PI = High V

Microphone Amplifier DC Bias at TXI Saturation Voltage at Mic @ 1.0 mA Leakage Current into Mic @ 3.7 V

HY1 HY2

V

TXI

V

Mic

I

Leak

– 2.4 – – 1.4 –

– – –

1.45 250

–

300

–

2.0

HOOK STATUS OUTPUT (Pin 13)

High Level Voltage @ – 5.0 µA Load Current, Off–Hook, V

SAI

= Max

V

HSOH

2.7

2.9

–

Maximum Load Current

Normal Mode I PABX Mode I

Low Level Voltage @ + 5.0 µA Load Current, V

= – 5.0 mV

SAI

Normal On–Hook V PI = High V

Time Delay from On–Hook or Off–Hook

HSOL

HSOH

HSOL

HSOLPI

T

Del

– – 5.0

20 – –

– – 0.60

2.7 2.9 – –

3.5

–

PULSE INPUT (Pin 14)

Input Impedance DC Bias Voltage

Z

PI

V

PIL

– –

160

1.4

– –

Input Current

Make Phase I Break Phase I

PIL

PIH

–1.0 – 1.0

–10 – 10

MUTE INPUT (Pin 15)

Input Impedance DC Bias Voltage

Z

MI

V

MI

– –

160

1.4

– –

Input Current

Speech Mode I Mute Mode I

MIL

MIH

–1.0 – 1.0

–10 – 10

DC MASK CHARACTERISTICS

French

Internal Slope RI 120 160 200 mV/µA Voltage on SAI (I2C = 3.6 µA) V Voltage on SAI (I2D = 4.0 µA) V

C D

Delta Offset Voltage on SAI (I2E = 30 µA) VE–V

D

0.40 0.47 – Vdc – 0.49 0.57 Vdc – – 30 mV

U.K.

Internal Slope RI 210 260 310 mV/µA Voltage on SAI (I2C = 3.5 µA) V Voltage on SAI (I2D = 3.9 µA) V

C D

Delta Offset Voltage on SAI (I2E = 30 µA) VE–V

D

0.59 0.70 – Vdc – 0.72 0.83 Vdc – 20 50 mV

Low Voltage Mode

Internal Slope RI 100 125 150 mV/µA Voltage on SAI (I2C = 13 µA) V Voltage on SAI (I2D = 15 µA) V Delta Offset Voltage on SAI (I2E = 20 µA) VE–V

Overvoltage Protection Threshold (V

LAI

– V

SAO

)

V

C D

D

Clamp1

1.0 1.2 – Vdc – 1.3 1.55 Vdc – – 100 mV

French and U.K. DC Masks 530 580 650 Low Voltage DC Mask 280 – 385

Protection Voltage Level (V

LAI

– V

SAO

)

V

Clamp2

French and U.K. DC Masks 350 – 440 Low Voltage DC Mask 280 – 440

Vdc

mV

µA

Vdc

µA

Vdc

ms

kΩ

Vdc

µA

kΩ

Vdc

µA

mV

MOTOROLA ANALOG IC DEVICE DATA

3

TCA3388

ÁÁÁ

AC ELECTRICAL CHARACTERISTICS

Characteristic

(TA = 25°C)

Symbol Min Typ Max Unit

TRANSMIT MODE

French and U.K.

Maximum Transmit Gain (I2 = 3.0 µA) Kµ0 11.25 12.5 13.75 Line Length Regulation (I2 = 30 µA) ∆Kµ 5.5 6.5 7.5 Gain in Protection Mode (I2 = 30 µA) Kµp 10.5 12.5 14.5

Low Voltage Mode

Maximum Transmit Gain (I2 = 3.0 µA) Kµ0 11.25 12.5 13.75 Line Length Regulation (I2 = 8.2 µA) ∆Kµ 4.5 6.0 7.5 Gain in Protection Mode (I2 = 8.2 µA) Kµp 10.5 12.5 14.5

Gain Reduction when Microphone is Muted

∆Kµm

60

–

RECEIVE MODE

French

Maximum Internal Transconductance (I2 = 3.0 µA) G Line Length Regulation (I2 = 18 µA) ∆G Hybrid Weighting Factor (I2 = 18 µA) m Line Length Regulation (HYS @ VCC, I2 = 9.0 µA) ∆G Protection Mode (I2 = 18 µA) G

e0

e

r

e

ep

150 180 210 µA/V

2.95 3.7 4.45 dB

0.4 0.5 0.6

1.5 2.1 2.5 dB

145 185 230 µA/V

U.K.

Maximum Internal Transconductance (I2 = 3.0 µA) G Line Length Regulation (I2 = 18 µA) ∆G Hybrid Weighting Factor (I2 = 13 µA) m Line Length Regulation (HYS @ VCC, I2 = 9.0 µA) ∆G Protection Mode (I2 = 18 µA) G

e0

e

r

e

ep

150 180 210 µA/V

2.8 3.5 4.3 dB

0.4 0.5 0.6

1.4 1.9 2.4 dB

145 185 230 µA/V

Low Voltage Mode

Maximum Internal Transconductance (I2 = 3.0 µA) G Line Length Regulation (I2 = 8.0 µA) ∆G Hybrid Weighting Factor (I2 = 7.0 µA) m Line Length Regulation (HYS @ VCC, I2 = 4.0 µA) ∆G Protection Mode (I2 = 8.0 µA) G

Earpiece Gain Reduction when Muted

∆G

e0

e

r

e

ep

em

150 185 210 µA/V

4.2 5.7 7.2 dB – 0.5 – – 3.0 – dB

145 185 230 µA/V

60

–

TRANSMIT PABX MODE

French and U.K.

Transmit Gain (I2 = 3.0 µA) K Variation with Line Length (I2 = 30 µA) ∆K

PABX

9.25 10.5 11.75

– 0.5 – 0.5

Low Voltage Mode

Transmit Gain (I2 = 3.0 µA) K Variation with Line Length (I2 = 30 µA) ∆K

PABX

9.25 10.5 11.75

– 0.5 – 0.5

RECEIVE PABX MODE

French

Internal Transconductance (I2 = 5.0 µA) G Hybrid Weighting Factor (I2 = 5.0 µA) m Variation with Line Length (I2 = 30 µA) ∆G

U.K.

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Internal Transconductance (I2 = 5.0 µA) G Hybrid Weighting Factor (I2 = 5.0 µA) m Variation with Line Length (I2 = 30 µA) ∆G

Low Voltage Mode

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Internal Transconductance (I2 = 3.0 µA) G Hybrid Weighting Factor (I2 = 3.0 µA) m Variation with Line Length (I2 = 30 µA) ∆G

PABX

r

PABX

ÁÁÁ

PABX

r

PABX

ÁÁÁ

PABX

r

PABX

120 145 170 µA/V

0.8 0.9 1.0

– 0.5 – 0.5 dB

ÁÁ

120 145 170 µA/V

ÁÁ

0.65 0.75 0.85

– 0.5 – 0.5 dB

ÁÁ

120 145 170 µA/V

ÁÁ

– 0.9 –

– 0.5 – 0.5 dB

DISTORTION

French

Transmit (I2 = 10 µA) THDT – – 3.0 Receive (I2 = 6.0 µA) VE = 700 mV THDR – – 3.0

VE = 1250 mV – – 5.0

NOTE:VE is the differential earpiece voltage across Pins 19 and 20.

–

ÁÁ

dB

ÁÁ

%

4

MOTOROLA ANALOG IC DEVICE DATA

TCA3388

ÁÁÁ

Á

AC ELECTRICAL CHARACTERISTICS (continued) (T

= 25°C)

A

Characteristic UnitMaxTypMinSymbol

DISTORTION

Low Voltage

Transmit (I2 = 10 µA) THDT – – 3.0 Receive (I2 = 6.0 µA) VE = 700 mV THDR – – 3.0

VE = 1250 mV – – 5.0

NOTE:VE is the differential earpiece voltage across Pins 19 and 20.

TYPICAL TEMPERATURE PERFORMANCE

Characteristic Typical Value @ 25°C Typical Change – 20 to + 60°C

VCC Regulated Supply @ Pin 17 Current Consumption at Pin 17, Pin PI = High Amplifier A8 Driver Slope Voltage on SAI V

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C

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V

D

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Internal Slope for Low Voltage Mode Transmit Gain Kµ0 Line Length Regulation ∆Kµ French

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Internal Transconductance G Line Length Regulation ∆G

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e0

e

French

NOTE: Temperature data is typical performance only, based on sample characterization, and does not provide guaranteed limits over temperature.

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U.K.

L.V .

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U.K.

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L.V .

3.7

400 µA

1.0 µA/mV

French = 0.47 Vdc

U.K. = 0.70 Vdc

French = 0.49 Vdc

U.K. = 0.72 Vdc

125 mV/µA

12.5 dB

6.5 dB

6.0 dB

180 µA/V

3.7 dB

3.5 dB

5.7 dB

– 0.8 mV/°C

– 0.55 µA/°C

– 0.0035 µA/mV/°C

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0.35 mV/°C

0.07 mV/µA/°C

0.01 dB/°C

< 0.3 dB Variation

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< 0.3 dB Variation

– 0.05 dB/°C < 1.0 dB Variation < 0.5 dB Variation

< 0.5 dB Variation

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– 0.04 dB/°C

%

PIN FUNCTION DESCRIPTION

Pin Symbol Description

1 RXI Earphone Amplifier Input 2 TXI Microphone Amplifier Input 3 Mic Microphone Bias Current Sink 4 LAO Line Driver Amplifier Output 5 LAI Line Driver Amplifier Input 6 HYL Hybrid Network Input for Long Lines 7 HYS Hybrid Network Input for Short Lines 8 CM DC Mask Signal Filtering

9 IMP Reference Voltage 10 SAO Line Current Sense Amplifier Output 11 SAI Line Current Sense Amplifier Input 12 DCM DC Mask Select 13 HSO Hook Status Output, PABX Mode Select 14 PI Pulse Input 15 MUT Mute Input 16 I 17 V

ref CC

18 Gnd Ground 19 RXO1 Earphone Amplifier Output 20 RXO2 Earphone Amplifier Inverted Output

Reference Current Supply Voltage

MOTOROLA ANALOG IC DEVICE DATA

5