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Philips Semiconductors
15. Dynamic characteristics
Table 16:
AC characteristics (AI/O pins; FULL speed)
= 1.5 k Ω on D+ to V
C
= 50 pF; R
L
PU
Symbol Parameter
Driver characteristics
t
rise time
R
t
fall time
F
t
rise/fall time matching (t
RFM
V
output signal crossover voltage
CRS
Driver timings
t
source EOP width
EOPT
t
differential data to EOP transition skew
DEOP
Receiver timings:
t
receiver data jitter tolerance to next transition
JR1
t
receiver data jitter tolerance for paired transitions
JR2
t
EOP width at receiver
EOPR1
t
EOP width at receiver
EOPR2
[1]
Test circuit, see
Figure
22.
[2]
Characterized but not implemented as production test. Guaranteed by design.
t
PERIOD
DIFFERENTIAL
DATA LINES
Fig 16. Differential data-to-EOP transition skew and EOP width.
9397 750 09238
Product data
[1]
; unless otherwise specified.
CC
/t
)
R
F
CROSSOVER POINT
DIFFERENTIAL DATA TO
SEO/EOP SKEW
N * t
+ t
PERIOD
DEOP
Rev. 08 — 20 December 2001
USB interface device with parallel bus
Conditions
10% to 90%
10% to 90%
see
Figure 16
see
Figure 16
must reject as EOP;
see
Figure 16
must accept as EOP;
see
Figure 16
CROSSOVER POINT
EXTENDED
PDIUSBD12
Min
Max
4
20
4
20
90
110
1.3
2.0
160
175
−2
+5
−18.5 +18.5 ns
−9
+9
40
[2]
-
−
[2]
82
SOURCE EOP WIDTH: t
EOPT
RECEIVER EOP WIDTH: t
, t
EOPR1
EOPR2
SV00837
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
Unit
ns
ns
%
V
ns
ns
ns
ns
ns
24 of 35
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