Philips ISP1122 15. Dynamic characteristics

Philips Semiconductors ISP1122
USB stand-alone hub
Product specification Rev. 03 — 29 March 2000 32 of 48
9397 750 07002 © Philips Electronics N.V. 2000. All rights reserved.
[1] D+ is the USB positive data pin (DPn); D− is the USB negative data pin (DMn).
[2] Includes external resistors of 20Ω±1% on both D+ and D−.
[3] This voltage is available at pin Vreg(3.3).
[4] In ‘suspend’ mode the minimum voltage is 2.7V.
15. Dynamic characteristics
[1] Dependent on the crystal oscillator start-up time.
Table 29: Static characteristics: analog I/O pins (D+, D−)[1]
V
CC
= 4.0 to 5.5 V; V
GND
=0V; T
amb
= − 40 to + 85 ° C; unless otherwise specified.
Symbol Parameter Conditions Min Ty p Max Unit
Input levels
VDI differential input sensitivity |VI(D+)−VI(D−)|0.2 - - V
VCM differential common mode
voltage includes VDI range 0.8 - 2.5 V
VIL LOW-level input voltage - - 0.8 V
VIH HIGH-level input voltage 2.0 - - V
Output levels
VOL LOW-level output voltage RL=1.5 kΩ to +3.6V - - 0.3 V
VOH HIGH-level output voltage RL=15kΩ to GND 2.8 - 3.6 V
Leakage current
ILZ OFF-state leakage current - - ±10 µA
Capacitance
CIN transceiver capacitance pin to GND - - 20 pF
Resistance
ZDRV[2] driver output impedance steady-state drive 28 - 44 Ω
ZINP input impedance 10 - - MΩ
Termination
VTERM[3] termination voltage for
upstream port pull-up (RPU)3.0[4] - 3.6 V
Table 30: Dynamic characteristics
V
CC
= 4.0 to 5.5 V; V
GND
=0V; T
amb
= − 40 to + 85 ° C; unless otherwise specified.
Symbol Parameter Conditions Min Ty p Max Unit
Reset
tW(RESET) pulse width on input RESET crystal oscillator running 10 - - µs
crystal oscillator stopped - 2[1] -ms
Crystal oscillator
fXTAL crystal frequency - 6 - MHz