2-203

Preliminary Information

MH88628

* Typical figure are at 25

‡ AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.

Notes:

Impedance set by external network of 600

Ω or 900Ω default.

External network for test purposes consists of 2200

and is equivalent o 220

Ω+820Ω // 115nF.

Test condition uses a Zin value of 600

Ω, 900Ω and the above external network.

Test conditions use a transmit and receive gain set to 0dB default and a Zin value of 600

Ω unless otherwise stated.

“Ref” indicates reference impedance which is equivalent to the termination impedance.

“Net” indicates network balance impedance.

Refer to Table 1, 2 for TX, RX gain adjustment.

Characteristics

Sym

Min

Typ*

Max

Units

Test Conditions

1

TX Gain

0

dB

externally adjustable

2

RX Gain

0

dB

externally adjustable

3

Ringing Capability

5

REN

4

On-Hook Transmission

Signal Input Level

Gain

6

2.0

dB

T-R load = 10k

Ω min.

5

External Signal Output Level

1.75

2.25

200

Ω LCA=0V, Zo-600Ω,

Gain=0dB

6SHK Rise Time

Fall time

1

1

ms

ms

Dial Pulse Detection

7

2-Wire Termination

Impedance

600/

900

Ω

Selectable

8

Off-Hook Detect Threshold

10

mA

9

2-Wire Return Loss

20

20

20

dB

dB

dB

300 to 500Hz

500 to 2500Hz

2500 to 3400Hz

10

Longitudinal Balance

Longitundinal to Metallic

58

53

dB

dB

200-1000Hz

1kHz - 3k4Hz

11

Longitudinal Current

Capability

40

mA

20mA per lead

12

Idle channel Noise

Rx to T-R

T-R to Tx

8

12

dBrnC

dBrnC

13

Transhybrid Loss

THL

22

40

dB

200-3400Hz

14

Unbalanced Detect Threshold

10

mA

15

Analog Signal Overload Level

At Tip and Ring

4

dBm

T-R=600

Ω, V

16

Ringing Signal Voltage

90

Vrms

17

Ringing Frequency

17

33

Hz

18

Ring Trip Delay

100

ms

19

Absolute Gain, Variation

+0.1

dB

0dB at T-R, 1kHz

20

Relative Gain, reference to

1kHz

+0.05

dB

300-3400Hz

21

Power Supply Rejection Ratio

PSRR

24

24

24

dB

1kHz, 100mVpp