Note: the limits below listed are guaranteed with the specified test condition and in the 0 to 70°C tem-

perature range. Performance over -40 to +85°C range are guaranteed by product characterisation.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Fig.

AC CHARACTERISTICS

Zil

Long. Impedance

each wire

40

Ω

Long. Current Capability AC

H.I. feeding per wire (ON-HOOK)

5

mApk

STANDBY or ACTIVE per

wire (ON-HOOK)

13

mApk

ACTIVE per wire (OFF-

Current

mApk

L/T

Long. to transv.

with nominal Rp value

60

dB

C5

T/L

Transv. to long.

40

dB

C3

2wRL

2W return loss.

300 to 3400Hz

22

dB

C6

THL

trans-hybrid loss.

1020Hz; 20Log |VRX/VTX|

30

dB

C2

Ovl

2W overload level

ACTIVE MODE at line

terminals on ref. imped.

3.2

dBm

TXoff

TX output offset

-200

200

mV

G24

Transmit gain abs.

0dBm 1020Hz

-12.38

-12.02

dB

C4

G42

Receive gain abs.

0dBm 1020Hz

5.74

6.1

dB

C1

G24fq

tx gain variation vs.

frequency

rel. 1020Hz, 0dBm 300 to

3400Hz

-0.1

0.1

dB

G42fq

rx gain variation vs.

frequency

rel. 1020Hz, 0dBm 300 to

3400Hz

-0.1

0.1

dB

V2wp

idle channel noise at line

terminals

psophometric

-82

-78

dBmp

C8

V4wp

idle channel noise at TX port

psophometric

-90

-84

dBmp

C7

Thd

total harm. dist. 2w-4w, 4w-

2w

0dBm, 1KHz Il = 20 to

45mA

-50

dB

Transfer Gain

= 20Log 









Ω

14.5

dB

THD (TTX)

TTX Harmonic Distortion

Ω

3%

DC CHARACTERISTICS (TTX pin connected to ground)

Vlohi

Line voltage

Il = 0, H.I. feeding

47

47.4

47.8

V

Vlo

Line voltage

Il = 0, SBY/ACTIVE/ON-

HOOK

38.6

39.9

40.6

V

Ilims

Short circ. curr.

14

16

18

mA

Ilimb

Short circ. curr.

11

17

20

mA

Ilima

Lim. current accuracy

Rel to progr. val. 20 to 45mA

ACTIVE NP, RP

-10

10

%

Rfeed

Feed res. accuracy

ACTIVE NP, RP

-10

10

%

Rfeed H.I.

Feeding resistance

H.I. feeding

1100

2100

Ω

STLC30R80

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