BCM43907 Preliminary Data Sheet
USB PHY Electrical Characteristics and Timing
Table 54 provides electrical and timing parameters for USB 1.1.
Table 54: USB 1.1 FS/LS Electrical and Timing Parameters a
Value
Parameter
Symbol
Minimum Typical
Maximum Unit
Condition
Baud Rate
FS
LS
B
B
–
–
12
–
–
Mbps
Mbps
–
–
PS
PS
1.5
Unit Interval
FS
LS
UI
UI
–
–
83.33
–
–
ns
ns
–
–
666.67
Receiver
Differential input sensitivity
Input common mode range
Input impedance
V
V
200
0.8
300
2.0
–
–
–
–
–
–
–
mV
V
Static |V
–
– V
|
FSDI
FSCM
IN
IDP
IDN
2.5
–
Z
kΩ
V
–
Input high voltage
Input low voltage
V
V
–
Static
Static
FSIH
FSIL
0.8
V
Transmitter
Output high voltage
Output low voltage
V
V
2.8
–
–
–
–
–
V
Static
Static
FSOH
FSOL
0.3
20
V
Output rise/fall time for fast T ,T
4
ns
10 to 90%
R
F
speed
Output rise/fall time for low
speed
T ,T
75
–
300
ns
10 to 90%
R
F
Fast-speed jitter
Low-speed jitter
Output impedance
–2
–
–
–
2
ns
ns
Ω
–
–
FSTX
LSTX
–25
28
25
44
R
Single ended
O
a. For more details, refer to the USB 1.1 Specification.
Broadcom®
March 12, 2016 • 43907-DS104-R
Page 118
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