MTH88437AS-P データシートの表示（PDF） - Mitel Networks

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MTH88437AS-P

Data Access Arrangement

Mitel Networks 

MH88437-P

Advance Information

.

Absolute Maximum Ratings* - All voltages are with respect to AGND unless otherwise specified.

Parameter

Sym Min Max

Units

Comments

1 DC Supply Voltage

2 Storage Temperature

3 DC Loop Voltage

4 Transient loop voltage

5 Ringing Voltage

6 Loop Current

VCC

TS

VTR

VTR

VR

ILOOP

-0.3

-55

-110

6

+125

+110

300

150

60

90

V

˚C

V

V

Vrms

mA

mA

1ms On hook

VBAT = -56V

CL=0 VTIP-RING ≤40V

CL=1

7 Ring Trip Current

ITRIP

180 mArms 250ms 10% duty cycle or

500ms single shot

*Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.

Recommended Operating Conditions

Parameter

Sym Min Typ‡ Max

1 DC Supply Voltages

2 Operating Temperatures

Industrial Temperature

VCC 4.75 5.0 5.25

TOP

0

25 70

-40

+85

3 Ringing Voltage

VR

75 90

‡ Typical figures are at 25˚C with nominal +5V supply and are for design aid only

Units

V

˚C

Test Conditions

Vrms VBat = -48V

Loop Electrical Characteristics †

Characteristics

Sym Min Typ‡ Max Units

Test Conditions

1 Ringing Voltage

VR

No Detect

Detect

14

Externally Adjustable

7 Vrms

Vrms

2 Ringing Frequency

15

68

Hz

3 Operating Loop Current

15

60

mA CL=0 VTIP-RING ≤40V

80 mA CL=1 (see Note 1)

4 Off-Hook DC Voltage

Externally Adjustable

6.0

V ILOOP=15mA)

6.0

V ILOOP=20mA) (Note 3)

7.8

V

ILOOP=26mA)

where R2 = 110kΩ

5 Leakage Current

(Tip or Ring to AGND)

10

µA 100V DC (see Note 2)

7

mA 1000V AC

6 Leakage Current on-hook

(Tip to Ring)

7 Dial Pulse Detection

ON

OFF

9

10

µΑ VBAT (= -50V)

18 20

VBAT (= -100V)

0

+1 +2 ms Dial pulse delay

0

+1 +2 ms

8 Loop Condition Detect Threshold

Off-Hook

5

Voltage across tip and

16

V ring

† Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.

‡ Typical figures are at 25°C with nominal + 5V supplies and are for design aid only.

Note 1: Low Loop current operation depends on value of resistor connected between VLoop 1 and VLoop 2.

Note 2: This is equivalent to 10MΩ leakage Tip/Ring to Ground.

Note 3. Refer to EIA/TIA 464 Section 4.1.1.4.4

8

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