TSC TS31002 Technical data

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TS31002

Pin assignment:

1. Vcc 5. Gnd

2. Rsl 6. Hfo

3. Lfi 7. Hfi

4. Lfo 8. Out

Tong Ringer

Operating Voltage 13 to 36V

Ringing Start Voltage 36V (max.)

General Description

The TS31002 is a bipolar integrated circuit designed for telephone bell replacement.

Features

 Designed for Telephone Bell Replacement

 Low Current Drain

 Adjustable 2-frequency Tone

 Adjustable Warbling Rate

Ordering Information

Part No. Operating Temp. Package

TS31002CD DIP-8

TS31002CS

-20 ~ +70

o

C

SOP-8

 Extension Tone Ringer Modules

 Alarms or Other Alerting Devices

 Adjustable for Reduced Supply Initiation Current.

 Built-in hysteresis prevents false triggering and rotary

dial ‘Chirps’

Block Diagram

TS31002 1-6 2004/09 rev. B

Absolute Maximum Rating

Description Symbol Value Unit

DC Supply Voltage (Referenced to GND) VCC + 36 V

Power Dissipation in Still Air Plastic DIP PD 400 mW

Switch Collector Voltage Tstg -65 to +150

Note: * Maximum Ratings are those values beyond which damage to the device may occur.

Functional operation should be restricted to the Recommended Operating Conditions.

o

C

Recommended Operating Conditions

Description Symbol

Operating Voltage Vopr

Operating Temperature TA

Min Max

13 36

-45 +65

Unit

V

o

C

Note: This device contains protection circuitry circuitry to guard against damage due to high static voltages or electric

fidlds. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to
this high-impedance circuit. For proper operation, V

and V

IN

OUT

GND≦(VIN or V

should be constrained to the range

≦Vcc.

OUT)

Unused inputs must always be tied to an appropriate logic voltage level (e.g.,either GND or Vcc). Unused outputs must
be left open.

Electrical Characteristics (Voltages Referenced to GND,T

Parameter

Symbol

Test Conditions Min Typ Max Unit

=-20 to +70

A

o

C)

Initiation Supply Voltage (1) VSI See Figure 2 16.8 -- 21.2 V

Initiation Supply Current (1) ISI See Figure 2 1.4 -- 4.2 mA

Sustaining Voltage (1) V

Sustaining Current I

See Figure 2 9.5 -- 12.2 V

SUS

See Figure 2

SUS

0.7 -- 2.5 mA

Vcc=21V,IOH=-15mA,

High-Level Output Voltage VOH

16.7 -- 21.0 V

Pin6=6V, Pin7=GND

Low-Level Output Voltage VOL

-- -- 1.8 V

Pin6= GND, Pin7=6V

Pin3 =6V, Pin4 =GND, Vcc=21V -- -- 1.0

Maximun Input Leakage Current IIN

Pin7 =6V, Pin6 =GND, Vcc=21V -- -- 1.0

High Frequency 1 FH1 R3 =191KΩ,C3 =6800pF 461 -- 563 HZ

High Frequency 2 FH2 R3 =191KΩ,C3 =6800pF 576 -- 704 HZ

Low Frequency FL R2 =165KΩ,C2 =0.47uF 9.0 -- 11.0 HZ

Ringing Start Voltage (4) Vtr See Figure 1 -- -- 36 V

Vcc=21V,IOL=15mA,

Notes : 1. Initiation supply voltage (V

2. Sustaining voltage (V

) is the supply voltage required to start the tone ringer oscillating.

SI

) is the supply voltage required to maintain oscillation.

SUS

3. Ringing start voltage is the value of AC supply voltage required to start the tone ringer ringing in FIG.3

4. This product is not designed for protection against radioactive rays.

5. All data and specifications are subject to change without notice.

TS31002 2-6 2004/09 rev. B

μA

μA

Application Circuit

. HOW TO USE THE RSL PIN

In the IC, the supply initiation current (lsi) can be changed using the RSL Pin. As show is the diagram, the RSL (Pin 2)

is grounded through resistor Rs. By changing the Rs value, supply initiation current can be changed.

Supply voltage (Vcc) vs. supply current (lcc) characteristics resulting from changes in the value of Rs are shown in the

following diagram.

Figure 1. Ringing Start Voltage Test Circuit

Figure 2. Test Circuit (1)

TS31002 3-6 2004/09 rev. B

Application Circuit

SWITCH POSITION IS THE FOLLOWING TABLE: :

PARAMETER SW1 SW2

Vsi , Isi 1 1

Vsus , Isus 1 1

Voh 2 2

Vol 2 3

Figure 3. Test Circuit (2)

SWITCH POSITION IS THE FOLLOWING TABLE :

PARAMETER SW1 SW2

FL 1 1
fH1 3 2
fH2 2 2

R1 = 165 K (+/-) 1%

R2 = 191 K (+/-) 1%

C1 = 0.47 µF (+/-) 5%

C2 = 0.0068 µF (+/-) 5%

R1 = 165 K (+/-) 1%

R2 = 191 K (+/-) 1%

C1 = 0.47 µF (+/-) 5%

C2 = 0.0068 µF (+/-) 5%

Application Note

The application circuit illustrates the use of the TS31002 devices in typical telephone or extension tone ringer
application.
The AC ringer signal voltage appears across the TIP and RING inputs of the circuit and is attenuated by capacitorC1
and resistor R1.
C1 also provides isolation from DC voltages (48V) on the exchange line.
After full wave rectification by the bridge diode, the waveform is filtered by capacitor C4 to provide a DC supply
for the tone ringer chip. As this voltage exceeds the initiation voltage (VSI), oscillation starts.
With the components shown, the ouptut frequency chops between 512(fh1) and 640Hz(fh2) at a 10Hz(fL) rate.
The loudspeaker load is coupled through a 1300W to 8W transformer.
The output coupling capacitor C5 is required with transformer coupled loads.
When driving a piezo-ceramic transducer type load, the coupling C5 and transformer (1300W:8W) are not required.
However, a current limiting resistor is required.
The low frequency oscillator oscillates at a rate (fL) controlled by an external resistor (R2) and capacitor (C2).
The frequency can be determined using the relation fL=1/1.289R2*C2. The high frequency oscillates at a fH1, fH2
controlled by an external resistor (R3) and capacitor (C3). The frequency can be determined using the relation
H1=1/1.504R3*C3, fH2=1/1.203R3*C3.

TS31002 4-6 2004/09 rev. B

Application Note

Pin 2 allows connection of an external resistor RSL, which is used to program the solpe of the supply current vs
supply voltage characteristics (see Fig2), and hence the supply current up to the initiation voltage ( VSI ). This
initiation voltage remains constant independent of RSL.
The supply current drawn prior to triggering varies inversely with RSL, decreasing for increasing value of
resistance. Thus, increasing the value of RSL will decrease the amount of AC ringing current required to trigger the
device. As such, longer sucribser loops are possible since less voltage is dropped per unit length of loop wire due to
the lower current level. RSL can also be used to compensated for smaller AC couplin capacitors (C5 on Fig 3)
(higher impedance) to the line which can be used to alter the ringer equivalence number of a tone ringer circuit.
The graph in Fig2 illustrates the variation of supply current with supply voltage. Three curves are drawn to show
the variation of initiation current with RSL. Curve B( RSL=6.8KW) shows the I-V characteristic for the TS31002 tone
ringer.
Curve A is a plot with RSL<6.8KW and shows an increase in the current drawn up to the initiation voltage VSI. The
I-V characteristic after initiation remains unchanged. Curve C illustrates the effect of increasing RSL above 6.8KW
initiation current decreases but again current after triggering is unchanged.

Characteristics Curve

Figure 4.

Figure 5.

TS31002 5-6 2004/09 rev. B

SOP-8 Mechanical Drawing

A

SOP-8 DIMENSION

MILLIMETERS INCHES

MIN MAX MIN MAX

o

0

o

7

o

16

DIM

9

PB

1

G

D

8

R

M

C

F

K

A 4.80 5.00 0.189 0.196

B 3.80 4.00 0.150 0.157

C 1.35 1.75 0.054 0.068

D 0.35 0.49 0.014 0.019

F 0.40 1.25 0.016 0.049

G 1.27 (typ) 0.05 (typ)

K 0.10 0.25 0.004 0.009

M 0o 7

P 5.80 6.20 0.229 0.244

R 0.25 0.50 0.010 0.019

DIP-8 Mechanical Drawing

A

DIP-8 DIMENSION

8

1

5

B

4

L

C

J

DIM

A 9.07 9.32 0.357 0.367

B 6.22 6.48 0.245 0.255

C 3.18 4.45 0.125 0.135

D 0.35 0.55 0.019 0.020

G 2.54 (typ) 0.10 (typ)

J 0.29 0.31 0.011 0.012

K 3.25 3.35 0.128 0.132

L 7.75 8.00 0.305 0.315

M - 10o - 10o

K

M

G

D

MILLIMETERS INCHES

MIN MAX MIN MAX

TS31002 6-6 2004/09 rev. B