ST5481

12/18

10 - ELECTRICAL SPECIFICATIONS

Unless otherwise stated, electrical characteristics are specified over the operating range.

Typical values are given for VBUS = +5V, VregA = 3.3V, VregD1 = VregD2 = 3.3V, Tamb = 25°C

10.1 - Absolute Maximum Rating

Notes GNDA = GNDD1 = GNDD2 = GNDBUS = 0V

Warning : Operation beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these

extremes.

1. In Remote Power Supply Mode (RPSM=0)

2. For the ISDN S side access “LOP,LON,LIP,LIN” pins the voltage level can temporary exceed the maximum rating due to the phone

line conditions. To prevent any damage to the circuit, an external protection circuit must be implemented according to the application

schematics.

10.2 - Nominal DC Characteristics

(Ta = 0 to 70°C unless otherwise specified)

Note

1. VREGD2 is always an analog power input, to be connected to VREGD1

Table 4 : Absolute maximum ratings

Symbol

Parameter

Value

Unit

VBUS

5V Power Supply Voltage

5.5V

V

VREGD1

-0.3V to 3.6V

V

VREGD2

-0.3V to 3.6V

V

VREGA

-0.3V to 3.6V

V

V

Digital Input Voltage

V

Digital Input Voltage on RPSM

-0.5 to VBUS + 0.3V

V

Operating Temperature

0, +70

°C

Storage Temperature

-55, +125 °C

°C

Table 5 : Nominal DC characteristics

Symbol

Parameter

Minimum

Typical

Maximum

Unit

VBUS

Supply voltage

4

5

5.25

V

Ivdd

Supply Current (RPSM=1)

TBD

TBD

mA

Ivdds

Supply Current in Suspended Mode (RPSM=1)

TBD

mA

VREGA

Analog regulated OUTPUT power supply (RPSM=1)

Analog regulated INPUT power supply (RPSM=0)

3.3-5%

3.3

3.3+5%

V

VREGD1

Digital regulated OUTPUT power supply (RPSM=1)

Digital regulated INPUT power supply (RPSM=0)

3.3-5%

3.3

3.3+5%

V

VREGD2

3.3-5%

3.3

3.3+5%

V

Analog regulated OUTPUT current (RPSM=1)

Analog regulated INPUT current (RPSM=0)

TBD

40

mA

Digital regulated OUTPUT current (RPSM=1)

Digital regulated INPUT current (RPSM=0)

TBD

40

mA

TBD

mA

Low Power mode (Suspended mode)

TBD

mW

Operating Power

TBD

mW