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Philips Semiconductors
ISP1122
USB stand-alone hub
Product specification Rev. 03 — 29 March 2000 31 of 48
9397 750 07002
© Philips Electronics N.V. 2000. All rights reserved.
14. Static characteristics
[1] In ‘suspend’ mode the minimum voltage is 2.7 V.
[1] Bus-powered mode.
[2] Self-powered or hybrid-powered mode.
Table 26: Static characteristics; supply pins
V
CC
= 4.0 to 5.5 V; V
GND
=0V; T
amb
=
−
40 to
+
85
°
C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
V
reg(3.3)
regulated supply voltage 3.0
[1]
3.3 3.6 V
I
CC
operating supply current - 18 - mA
I
CC(susp
) suspend supply current 1.5 kΩ pull-up on upstream
port D+ (pin DP0)
- - 270 µA
no pull-up on upstream port
D+ (pin DP0)
--80µA
Table 27: Static characteristics: digital pins
V
CC
= 4.0 to 5.5 V; V
GND
=0V; T
amb
=
−
40 to
+
85
°
C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Input levels
V
IL
LOW-level input voltage - - 0.8 V
V
IH
HIGH-level input voltage 2.0 - - V
Schmitt trigger inputs
V
th(LH)
positive-going threshold
voltage
1.4 - 1.9 V
V
th(HL)
negative-going threshold
voltage
0.9 - 1.5 V
V
hys
hysteresis voltage 0.4 - 0.7 V
Output levels
V
OL
LOW-level output voltage
(open drain outputs)
I
OL
= 6 mA - - 0.4 V
I
OL
=20µA - - 0.1 V
Leakage current
I
LI
input leakage current - - ±1 µA
Open-drain outputs
I
OZ
OFF-state output current - - ±1 µA
Table 28: Static characteristics: overcurrent sense pins
V
CC
= 4.0 to 5.5 V; V
GND
=0V; T
amb
=
−
40 to
+
85
°
C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
∆V
trip
overcurrent detection
trip voltage on
OCn pins
∆V=V
CC
− V
OCn
[1]
65 85 105 mV
∆V=V
SP/BP
− V
OCn
[2]