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ISP1102

Advanced Universal Serial Bus transceiver

NXP Semiconductors. 

NXP Semiconductors

ISP1102

Advanced USB transceiver

7.4 Power supply input options

The ISP1102 has two power supply input options.

Internal regulator — Pin VCC(5V0) is connected to 4.0 V to 5.5 V. The internal regulator is

used to supply the internal circuitry with 3.3 V (nominal). The VREG3V3 pin becomes a

3.3 V output reference.

Regulator bypass — Pins VCC(5V0) and VREG3V3 are connected to the same supply.

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

pin VREG3V3. The voltage range is 3.0 V to 3.6 V to comply with Universal Serial Bus

Specification Rev. 2.0.

The supply voltage range for each input option is specified in Table 8.

Table 8. Power supply input options

Input option

VCC(5V0)

VREG3V3

Internal regulator supply input for internal regulator voltage reference output (3.3 V,

(4.0 V to 5.5 V)

300 µA)

Regulator bypass connected to VREG3V3 with

maximum voltage drop of 0.3 V

(2.7 V to 3.6 V)

supply input (3.0 V to 3.6 V)

VCC(I/O)

supply input for digital I/O pins

(1.65 V to 3.6 V)

supply input for digital I/O pins

(1.65 V to 3.6 V)

ISP1102_5

Product data sheet

Rev. 05 — 11 December 2007

© NXP B.V. 2007. All rights reserved.

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