Alcor AU9510, Technical Reference Manual

Page: 23 / 30

ELECTRICAL CHARACTERISTICS 19
AC ELECTRICAL CHARACTERISTICS
GND=0V, t
R
= t
F
=3.0 ns; C
L
=50 pF; RL=500 Ohms
LIMITS (T
AMB
)
0
˚
C to +25
˚
C 0
˚
C to +70
˚
C UNIT
SYMBOL PARAMETER WAVEFORM
MIN TYP MAX MIN MAX
tpLH
tpHL VMO/VPO to D+/D-
Full Speed 1 0
0
12
12
0
0 14
14 ns
trise
tfall Rise and Fall Times
Full Speed 2 4
4
9
9 20
20 4
4 20
20 ns
tRFM
Rise and Fall Time
Matching
Full Speed 90 110 90 110 %
tpLH
tpHL VMO/VPO to D+/D-
Low Speed 1 120
120 300
300 300
300
ns
trise
tfall Rise and Fall Times
Low Speed 2 75
75
300
200
75
75 300
200 ns
tRFM
Rise and Fall Time
Matching
Low Speed 70 130 70 130 %
tpLH
tpHL D+/D- to RCV 3 9
9 16
16 16
16
ns
tpLH
tpHL D+/D- to VP/VM 1 4
4 8
8 8
8
ns
tpHZ
tpZH
tpLZ
tpZL
OE# to D+/D- RL =
500ohm
4 12
12
10
10
12
12
10
10
ns
tsu Setup for SPEED 5 0 ns
Vcr Crossover point
1
3 1.3 2.0 1.3 2.0 V
NOTES:
1. The crossover point is in the range of 1.3V to 2.5V for the low speed mode with a 50 pF
capacitance.