CP3BT26 Datasheet, PDF (261/278 Pages) National Semiconductor (TI) – Reprogrammable Connectivity Processor with Bluetooth-R, USB, and CAN Interfaces

30.13 USB PORT AC CHARACTERISTICS
Table 90 USB Port Signals
Symbol
Description
T_R
T_F
T_RFM
V_CRS
Z_DRV
Rise Time
Fall Time
Fall/Rise Time Matching (T_R/T_F)
Output Signal Crossover Voltage
Driver Output Impedance
Conditions^a
C_L = 50 pF
C_L = 50 pF
C_L = 50 pF
C_L = 50 pF
C_L = 50 pF
Min
Typ
Max Units
4
20
ns
4
20
ns
90
110
%
1.3
2.0
V
28
43
ohms
a. Waveforms measured at 10% to 90%.
30.14 MULTI-FUNCTION TIMER (MFT) TIMING
Table 91 Multi-Function Timer Input Signals
Symbol Figure
Description
t_TAH 129 TA High Time
t_TAL
129 TA Low Time
t_TBH 129 TB High Time
t_TBL 129 TB Low Time
Reference
Rising Edge (RE) on CLK
RE on CLK
RE on CLK
RE on CLK
Min (ns)
T_CLK + 5
T_CLK + 5
T_CLK + 5
T_CLK + 5
Max (ns)
CLK
TA/TB
t_TAL /t_TBL
t_TAL /t_TBH
Figure 129. Multi-Function Timer Input Timing
DS169
261
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