Philips TEA6101T-N2 Datasheet

DATA SH EET

Objective specification
File under Integrated circuits, IC01

May 1992

INTEGRATED CIRCUITS

TEA6101/T

Antenna diversity circuit

May 1992 2

Philips Semiconductors Objective specification

Antenna diversity circuit TEA6101/T

FEATURES

• Ability to switch between up to four antennae

• Switching signal derived from two signals: the audio and

the level signals

• Floating switching threshold adjusts switching rate to
prevailing circumstances:

– increasing threshold due to excessive noise
– increasing threshold due to numerous level variations

• Memory for the most favourable antenna signal to
overcome unnecessary switching

• Signal-dependent `soft` muting circuit

• Mode selection to the first antenna receiving an AM

signal whilst the diversity system is reset.

APPLICATIONS

• Car radio receivers

• Mobile radio communications equipment

GENERAL DESCRIPTION

Intended for multi-antenna FM car radio reception
(antenna diversity system), the TEA6101/T selects the
most favourable signal from one of up to four antennae.
Founded upon audible signal disturbance the criteria are
derived from two signals: high frequency components (e.g.
spikes due to noise and multipath reception) and
variations in signal level as a result of multipath reception
or fluctuations in field strength.

QUICK REFERENCE DATA

ORDERING INFORMATION

Notes

1. SOT102-1; 1996 September 10.

2. SOT163-1; 1996 September 10.

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V

P

positive supply voltage − 8.5 − V

I

P

positive supply current − 14 − mA

V

I(p-p)

audio input voltage (peak-to-peak value) −−3V

I

os

antenna switch output current (source/sink) −−7mA

V

L

−3 dB audio attenuation (soft mute) − 1.45 − V

T

amb

operating ambient temperature range −30 − +85 °C

EXTENDED TYPE NUMBER

PACKAGE

PINS PIN POSITION MATERIAL CODE

TEA6101 18 DIL plastic SOT102

(1)

TEA6101T 20 SO plastic SOT163A

(2)

May 1992 3

Philips Semiconductors Objective specification

Antenna diversity circuit TEA6101/T

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handbook, full pagewidth

MBA543 - 1

TEA6101T

VOLTAGE

REFERENCE

ADDER

ADDER

ADDER

100

Ω

R3

TIMING

MODE SELECT

MEMORY

COMPARATOR

4 - STAGE
JOHNSON
COUNTER

19
18
17
16

&

1

STABILIZER

OFFSET

12
k

Ω

R1

1.5
kΩ

LOW - PASS

FILTER

HIGH - PASS

FILTER

offset

voltage

V

(min)

ADDER

&

&

&&

V

ref

V

U

V

I

3

MUTE

MONOSTABLE

MULTIVIBRATOR

offset

complete stop reset

reset

0.47
µF

audio input

33
nF

ADDER

ADDER

VOLTAGE

REFERENCE

33

kΩ

1.5

kΩ

1

µF

R2

14

20
k

Ω

offset
voltage

20
k

Ω

3.6 V

delay soft mute

level input direct

3.3
nF

level input

via

capacitor

1

µF

7

5

6

4

8

11 10 13 9 1

20

12

15 2

ground

47 nF

level
averaging

test pin

memory
timing

control

to

antenna

switch

LOAD

reference

voltage

supply

noise

averaging

0.1 µF

not connected

audio output

modulus output

3.3

kΩ

Fig.1 Block diagram.

May 1992 4

Philips Semiconductors Objective specification

Antenna diversity circuit TEA6101/T

PINNING

The pin numbers given in parenthesis refer to the
TEA6101

SYMBOL PIN DESCRIPTION

V

P

1 (1) positive supply
CTRL 2 (2) control input
AUDIN 3 (3) audio input
AUDOUT 4 (4) audio output
LID 5 (5) level input direct
LIC 6 (6) level input via capacitor
DSM 7 (7) delay soft mute
MODOUT 8 (8) modulus output
V

ref

9 (9) reference voltage
n.c. 10 − not connected
n.c. 11 − not connected
TEST 12 (10) test pin
NOAV 13 (11) noise averaging
LEAV 14 (12) level averaging
MT 15 (13) memory timing
OUT4 16 (14) output 4
OUT3 17 (15) output 3
OUT2 18 (16) output 2
OUT1 19 (17) output 1
GND 20 (18) ground

handbook, halfpage

1
2
3
4
5
6
7
8
9

10

20
19
18
17
16
15
14
13
12
11

MBA542 - 1

n.c.

n.c.

TEA6101T

CTRL

AUDIN

AUDOUT

LID

LIC

DSM

MODOUT

GND
OUT1
OUT2
OUT3
OUT4
MT
LEAV
NOAV
TEST

V

P

V

REF

Fig.2 Pin configuration (TEA6101T).

handbook, halfpage

1
2
3
4
5
6
7
8
9

18
17
16
15
14
13
12
11
10

CTRL

AUDIN

AUDOUT

LID

LIC

DSM

MODOUT

MBA541 - 1

GND
OUT1
OUT2
OUT3
OUT4
MT
LEAV
NOAV
TEST

TEA6101

V

P

V

REF

Fig.3 Pin configuration (TEA6101).