ISP1106 datasheet(8/24 Pages) PHILIPS

8 / 24 page

Philips Semiconductors

ISP1105/1106/1107

Advanced USB transceivers

Product data

Rev. 06 — 30 November 2001

8 of 24

9397 750 08872

low-power (suspended) state level. Both the VP and VM pins are driven HIGH to

indicate this mode. Pin RCV is made LOW. Some hysteresis is built into the detection

of Vreg(3.3) lost.

[1]

High impedance or driven LOW.

[2]

ISP1105 only.

[1]

High impedance or driven LOW.

7.4 Power supply input options

The ISP1105/1106/1107 range has two power supply input options:

Internal regulator — VCC(5.0) is connected to 4.0 to 5.5 V. The internal regulator is

used to supply the internal circuitry with 3.3 V (nominal). The Vreg(3.3) pin becomes a

3.3 V output reference.

Regulator bypass — VCC(5.0) and Vreg(3.3) are connected to the same supply. The

internal regulator is bypassed and the internal circuitry is supplied directly from the

Vreg(3.3) power supply. The voltage range is 3.0 to 3.6 V to comply with the USB

speciﬁcation.

The supply voltage range for each input option is speciﬁed in Table 10.

Table 8:

Pin states in Disable or Sharing mode

Pins

Disable mode state

Sharing mode state

VCC(5.0)/Vreg(3.3)

5 V input / 3.3 V output

3.3 V input / 3.3 V input

not present

VCC(I/O)

not present

1.65 V to 3.6 V input

Vpu(3.3)

high impedance (off)

+, D−)

high impedance

(VP, VM)

invalid[1]

RCV

invalid[1]

Inputs (VO/VPO, FSE0/VMO,

SPEED, MODE[2], SUSPND, OE,

SOFTCON)

high impedance

Table 9:

Power supply conﬁguration overview

VCC(5.0) or

Vreg(3.3)

VCC(I/O)

Conﬁguration

Special characteristics

connected

Normal mode

connected

not connected

Disable mode

+, D−) and V

pu(3.3) high

impedance; VP, VM, RCV:

invalid[1]

not connected

connected

Sharing mode

+, D−) and Vpu(3.3) high

impedance;

VP, VM driven HIGH;

RCV driven LOW

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