Временные/Электрические Характеристики Шины
Таблица 7-4. Электрические Характеристики DC
| Parameter | Symbol | Conditions (Notes 1,2) | Min. | Max. |
| Unit | |||||
| Supply Voltage: | |||||||||||
| Powered (Host or Hub) Port | VBUS | 4.75 | 5.25 | V | |||||||
| Bus-powered Hub Port | VBUS | 4.40 | 5.25 | V | |||||||
| Supply Current: | |||||||||||
| Powered Host/Hub Port (out) | ICCPRT | 500 | mA | ||||||||
| Bus-powered Hub Port (out) | ICCUPT | 100 | mA | ||||||||
| High Power Function (in) | ICCHPF | 500 | mA | ||||||||
| Low Power Function (in) | ICCLPF | 100 | mA | ||||||||
| Unconfig. Function/Hub (in) | ICCINIT | 100 | mA | ||||||||
| Suspended Device | ICCS | 500 | mA | ||||||||
| Leakage Current: | |||||||||||
| Hi-Z State Data Line Leakage | ILO | 0 V< VIN<3.3 V | -10 | +10 | mA | ||||||
| Input Levels: | |||||||||||
| Differential Input Sensitivity | VDI | |(D+)-(D-)|, и Рисунок 7-4 | 0.2 | V | |||||||
| Differential Common Mode Range | VCM | Includes VDI range | 0.8 | 2.5 | V | ||||||
| Single Ended Receiver Threshold | VSE | 0.8 | 2.0 | V | |||||||
| Output Levels: | |||||||||||
| Static Output Low | VOL | RL of 1.5 kW to 3.6 V | 0.3 | V | |||||||
| Static Output High | VOH | RL of 15 kW to GND | 2.8 | 3.6 | V | ||||||
| Capacitance: | |||||||||||
| Transceiver Capacitance | CIN | Pin to GND | 20 | pF | |||||||
| Downstream Hub Port Bypass Capacitance | CHPB | Vbus to GND (tantalum) | 120 | mF | |||||||
| Root Port Bypass Capacitance | CRPB | Vbus to GND Note 9 | 1.0 | 10.0 | mF | ||||||
| Terminations: | |||||||||||
| Bus Pull-up Resistor on Root Port | RPU | (1.5 kW ± 5%) | 1.425 | 1.575 | kW | ||||||
| Bus Pull-down Resistor on Downstream Port | RPD | (15 kW ± 5%) | 14.25 | 15.75 | kW | ||||||
| Cable Impedance and Timing: | |||||||||||
| Cable Impedance (Full Speed) | ZO | (45 W ±15%) | 38.75 | 51.75 | W | ||||||
| Cable Delay (one way) | TCBL | Рисунок 7-21 | 30 | ns |
Таблица 7-5. Электрические Характеристики Полно Скоростных Источников
|
Parameter |
Symbol |
Conditions (Notes 1,2,3) |
Min. |
Max. |
Unit |
|
Driver Characteristics: |
|||||
|
Transition Time: Rise Time Fall Time |
TR TF |
Note 5, 6 and Рисунок 7-16 CL = 50 pF CL = 50 pF |
4 4 |
20 20 |
ns ns |
|
Rise / Fall Time Matching |
TRFM |
(TR/TF) |
90 |
110 |
% |
|
Output Signal Crossover Voltage |
VCRS |
1.3 |
2.0 |
V |
|
|
Driver Output Resistance |
ZDRV |
Steady State Drive |
28 |
43 |
W |
|
Data Source Timings: |
|||||
|
Full Speed Data Rate |
TDRATE |
Ave. Bit Rate (12 Mb/s ± 0.25%) |
11.97 |
12.03 |
Mbs |
|
Frame Interval |
TFRAME |
1.0 ms ± 0.05% |
0.9995 |
1.0005 |
ms |
|
Source Differential Driver Jitter To Next Transition For Paired Transitions |
TDJ1 TDJ2 |
Note 7, 8 and Рисунок 7-29 |
-3.5 -4.0 |
3.5 4.0 |
ns ns |
|
Source EOP Width |
TEOPT |
Note 8 and Рисунок 7-30 |
160 |
175 |
ns |
|
Differential to EOP transition Skew |
TDEOP |
Note 8 and Рисунок 7-30 |
-2 |
5 |
ns |
|
Receiver Data Jitter Tolerance To Next Transition For Paired Transitions |
TJR1 TJR2 |
Note 8 and Рисунок 7-31 |
-18.5 -9 |
18.5 9 |
ns ns |
|
EOP Width at receiver Must reject as EOP Must accept as EOP |
TEOPR1 TEOPR2 |
Note 8 and Рисунок 7-30 |
40 82 |
ns ns |
Таблица 7-6. Электрические Характеристики Низко Скоростных Источников
|
Parameter |
Symbol |
Conditions (Notes 1,2,4) |
Min. |
Max. |
Unit |
|
Driver Characteristics: |
|||||
|
Transition Time: Rise Time Fall Time |
TR TF |
Note 5, 6 and Рисунок 7-16 CL = 50 pF CL = 350 pF CL = 50 pF CL = 350 pF |
75 75 |
300 300 |
ns ns ns ns |
|
Rise/Fall Time Matching |
TRFM |
(TR/TF) |
80 |
120 |
% |
|
Output Signal Crossover Voltage |
VCRS |
1.3 |
2.0 |
V |
|
|
Data Source Timings: |
|||||
|
Low Speed Data Rate |
TDRATE |
Ave. Bit Rate (1.5 Mb/s ± 1.5%) |
1.4775 |
1.5225 |
Mbs |
|
Source Differential Driver Jitter Host (Downstream): To Next Transition For Paired Transitions Function (Upstream): To Next Transition For Paired Transitions |
TDDJ1 TDDJ2 TUDJ1 TUDJ2 |
Note 7, 8 and Рисунок 7-29 |
-75 -45 -95 -150 |
75 45 95 150 |
ns ns ns ns |
|
Source EOP Width |
TEOPT |
Note 8 and Рисунок 7-30 |
1.25 |
1.50 |
ms |
|
Differential to EOP transition Skew |
TDEOP |
Note 8 and Рисунок 7-30 |
-40 |
100 |
ns |
|
Receiver Data Jitter Tolerance At Host (Upstream): To Next Transition For Paired Transitions At Function (Downstream): To Next Transition For Paired Transitions |
TUJR1 TUJR2 TDJR1 TDJR2 |
Note 8 and Рисунок 7-31 |
-152 -200 -75 -45 |
152 200 75 45 |
ns ns ns ns |
|
EOP Width at receiver Must reject as EOP Must accept |
TEOPR1 TEOPR2 |
Note 8 and Рисунок 7-30 |
330 675 |
ns ns |
Таблица 7-7. Электрические Характеристики Концентратора/Повторителя
|
Parameter |
Symbol |
Conditions (Note 2) |
Min. |
Max. |
Unit |
|
Hub Characteristics (Full Speed): |
|||||
|
Driver Characteristics (Refer to Таблица 7-5) |
Root port and Downstream ports configured as Full Speed |
||||
|
Hub Differential Data Delay (with cable) (without cable) |
THDD1 THDD2 |
Note 3, 7, 8 and Рисунок 7-32 |
70 40 |
ns ns |
|
|
Hub Differential Driver Jitter (including cable) To Next Transition For Paired Transitions |
THDJ1 THDJ2 |
Note 3, 7, 8 and Рисунок 7-32 |
-3 -1 |
3 1 |
ns ns |
|
Data bit width distortion after SOP |
TSOP |
Note 3, 8 and Рисунок 7-32 |
-5 |
3 |
|
|
Hub EOP Delay Relative to tHDD |
TEOPD |
Note 3, 8 and Рисунок 7-33 |
0 |
15 |
ns |
|
Hub EOP Output Width Skew |
THESK |
Note 3, 8 and Рисунок 7-33 |
-15 |
15 |
ns |
|
Hub Timings (Low Speed): |
|||||
|
Driver Characteristics (Refer to Таблица 7-6) |
Downstream ports configured as Low Speed |
||||
|
Hub Differential Data Delay |
TLHDD |
Note 4, 7, 8 and Рисунок 7-32 |
300 |
ns |
|
|
Hub Differential Driver Jitter (including cable) Downstream: To Next Transition For Paired Transitions Upstream: To Next Transition For Paired Transitions |
TLDHJ1 TLDHJ2 TLUHJ1 TLUHJ2 |
Note 4, 7, 8 and Рисунок 7-32 |
-45 -15 -45 -45 |
45 15 45 45 |
ns ns ns ns |
|
Data bit width distortion after SOP |
TSOP |
Note 4, 8 and Рисунок 7-32 |
-60 |
45 |
|
|
Hub EOP Delay Relative to tHDD |
TLEOPD |
Note 4, 8 and Рисунок 7-33 |
0 |
200 |
ns |
|
Hub EOP Output Width Skew |
TLHESK |
Note 4, 8 and Рисунок 7-33 |
-300 |
+300 |
ns |
Note 1: All voltages measured from the local ground potential, unless otherwise specified.
Note 2: All timings use a capacitive load (CL) to ground of 50 pF, unless otherwise specified.
Note 3: Full Speed timings have a 1.5 kW pull-up to 2.8 V on the D+ data line.
Note 4: Low Speed timings have a 1.5 kW pull-up to 2.8 V on the D- data line.
Note 5: Measured from 10% to 90% of the data signal.
Note 6: The rising and falling edges should be smoothly transitioning (monotonic).
Note 7: Timing difference between the differential data signals.
Note 8: Measured at crossover point of differential data signals.
Note 9: The maximum load specification is the maximum effective capacitive load allowed that meets the target hub VBUS droop of 330 mV.
