ISP1104 datasheet(4/19 Pages) PHILIPS

4 / 19 page

Philips Semiconductors

ISP1104

Advanced USB transceiver

Product data

Rev. 02 — 14 October 2003

4 of 19

9397 750 11229

[1]

Symbol names with an overscore (for example, NAME) indicate active LOW signals.

SUSPND

suspend input (CMOS level with respect to VCC(I/O)); a

HIGH level enables low-power state while the USB bus is

inactive and drives output RCV to a LOW level

input pad; push pull; CMOS

MODE

mode input (CMOS level with respect to VCC(I/O)); a HIGH

level enables the differential input mode (pins VPO and

VMO) whereas a LOW level enables a single-ended input

mode (pins VO and FSE0); see Table 4 and Table 5

input pad; push pull; CMOS

VCC(I/O)

supply voltage for digital I/O pins (1.65 V to 3.6 V); when

VCC(I/O) is not connected, the pins D+ and D− are in

three-state; this supply pin is totally independent of

VCC(5.0) and Vreg(3.3) and must never exceed the Vreg(3.3)

voltage

VBUSDET

VBUS indicator output (CMOS level with respect to

VCC(I/O)); when VBUS > 4.1 V, then VBUSDET = HIGH and

when VBUS < 3.6 V, then VBUSDET = LOW

output pad; push pull; 4 mA output drive; CMOS

−

AI/O

negative USB data bus connection (analog, differential)

AI/O

positive USB data bus connection (analog, differential);

connect a 1.5 k

Ω resistor to pin Vpu(3.3)

VPO/VO

driver data input (CMOS level with respect to VCC(I/O),

Schmitt trigger); see Table 4 and Table 5

input pad; push pull; CMOS

VMO/FSE0

driver data input (CMOS level with respect to VCC(I/O),

Schmitt trigger); see Table 4 and Table 5

input pad; push pull; CMOS

Vreg(3.3)

regulated supply voltage output (3.0 V to 3.6 V); a

decoupling capacitor of at least 0.1

µF is required

VCC(5.0)

supply voltage input (4.0 V to 5.5 V); can be connected

directly to the USB supply line VBUS

Vpu(3.3)

pull-up supply voltage (3.3 V

± 10 %); connect an external

1.5 k

Ω resistor on pin D+ (full-speed); pin function is

controlled by input SOFTCON

SOFTCON = LOW — Vpu(3.3) ﬂoating (high impedance);

ensures zero pull-up current

SOFTCON = HIGH — Vpu(3.3) = 3.3 V; internally

connected to Vreg(3.3)

SOFTCON

software controlled USB connection input; a HIGH level

applies 3.3 V to pin Vpu(3.3), which is connected to an

external 1.5 k

Ω pull-up resistor; this allows USB connect

or disconnect signalling to be controlled by software

input pad; push pull; CMOS

GND

exposed

die pad

ground supply; down bonded to the exposed die pad

(heatsink); to be connected to the PCB ground

Table 2:

Pin description…continued

Symbol[1]

Type

Description

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