isp1520 NXP Semiconductors, isp1520 Datasheet - Page 35

• Manufacturer Part Number: isp1520
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
15. Dynamic characteristics
Table 40.
[1]
[2]
Table 41.
V
Table 42.
V
[1]
ISP1520_4
Product data sheet
Symbol
Reset
t
t
Crystal oscillator
f
External clock input
Symbol
Overcurrent sense pins OC1_N to OC4_N
t
Symbol
t
t
W(POR)
W(RESET_N)
clk
trip
t(HL)
t(LH)
CC
CC
Recommended accuracy of the clock frequency is 500 ppm for the crystal.
Suggested values for external capacitors when using a crystal are 22 pF to 27 pF.
= 3.0 V to 3.6 V; T
= 3.0 V to 3.6 V; T
All pins are 5 V tolerant.
,
Parameter
overcurrent trip response time from
OCn_N LOW to PSWn_N HIGH
Parameter
output transition time
Dynamic characteristics: system clock timing
Dynamic characteristics: overcurrent sense timing
Dynamic characteristics: digital pins
Parameter
internal power-on reset pulse
width
external RESET_N pulse width
clock frequency
clock duty cycle
amb
amb
Fig 9. Overcurrent trip response timing
= 40 C to +70 C; unless otherwise specified.
= 40 C to +70 C; unless otherwise specified.
Overcurrent input: pins OCn_N; power switch output: pins PSWn_N.
power switch
overcurrent
Conditions
crystal
Conditions
see
Conditions
output
input
Rev. 04 — 28 April 2006
Figure 9
V
V
0 V
0 V
CC
CC
V
trip
t
trip
[1]
[1][2]
Min
0.2
0.2
-
-
Min
-
Min
4
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
mbl032
Typ
-
-
12
50
Typ
-
Typ
-
ISP1520
Max
1
-
-
-
Max
15
Max
15
Unit
MHz
%
Unit
ms
35 of 53
s
s
Unit
ns