TI-TS3USB221A-Q1：汽车级高速USB2.0切换器

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"TI-TS3USB221A-Q1.pdf" TI-TS3USB221A-Q1是一款由德州仪器（Texas Instruments）推出的，适用于汽车应用的高性能USB 2.0（480Mbps）1:2多路复用/解复用开关。这款器件具备单个使能（OE）功能，主要特点包括： 1. 汽车应用资格认证：该器件已通过AEC-Q100测试，可满足-40°C至125°C的汽车级工作温度范围要求，确保在严苛环境下的可靠性能。 2. 高级别静电放电（ESD）保护：设备符合人体模型（HBM）ESD分类等级H2和充电设备模型（CDM）ESD分类等级C5，提供了良好的抗静电干扰能力。 3. 宽泛的工作电压：TS3USB221A-Q1支持2.5V至3.3V的电源电压，兼容多种系统电源标准。 4. 高电平兼容性：输入/输出（I/O）端口可以接受高达5.5V的信号，增加了设计的灵活性。 5. 控制引脚输入兼容1.8V：控制引脚输入电压兼容1.8V，方便与低电压系统集成。 6. 低功耗特性：当OE被禁用时，进入低功耗模式，电流消耗仅为1μA，有助于降低系统能耗。 7. 低导通电阻：最大导通电阻（rON）为16Ω，典型的ΔrON（导通电阻差）仅为0.2Ω，确保了信号传输的高效和稳定性。 8. 低电容：典型的关闭电容（Cio(on)）为6pF，有助于保持高速信号的完整性。 9. 超低功耗：最大功率消耗为30μA，进一步优化了能源效率。 10. 高带宽：典型带宽高达900MHz，适用于高速数据传输应用。 11. ESD性能测试：器件经过严格的ESD性能测试，增强了其在实际应用中的耐用性和可靠性。这款开关适用于需要高数据速率、低功耗和ESD保护的USB接口设计，例如在汽车电子、工业控制或消费类电子产品中，它能够有效地管理USB端口的信号路由，提高系统的可靠性和安全性。同时，由于其汽车级别的认证，TS3USB221A-Q1也特别适合于需要在恶劣环境中运行的设备。

TS3USB221A-Q1

www.ti.com

SCDS300E –JULY 2010–REVISED JUNE 2020

Product Folder Links: TS3USB221A-Q1

(1) V

and I

refer to control inputs. V

, V

, I

, and I

refer to data pins.

(2) All typical values are at V

= 3.3 V (unless otherwise noted), T

= 25°C.

(3) For I/O ports, the parameter I

includes the input leakage current.

(4) This is the increase in supply current for each input that is at the specified TTL voltage level, rather than V

or GND.

(5) Measured by the voltage drop between the A and B terminals at the indicated current through the switch. ON-state resistance is

determined by the lower of the voltages of the two (A or B) terminals.

6.5 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)

(1)

PARAMETER TEST CONDITIONS MIN TYP

(2)

MAX UNIT

Input-source clamp

voltage

= 3.6 V, 2.7 V, I

= –18 mA –1.8 V

Input leakage current,

control inputs

= 3.6 V, 2.7 V, 0 V, V

= 0 V to 3.6 V ±1 µA

(3)

Off-state leakage

current

= 3.6 V, 2.7 V, V

= 0 V to 5.25 V, V

= 0 V, V

= V

or GND,

Switch OFF

±1 µA

(OFF)

Power-off leakage

current

= 0 V

I/O

= 0 V to 5.25 V ±2

µAV

I/O

= 0 V to 3.6 V ±2

I/O

= 0 V to 2.7 V ±1

Supply current V

= 3.6 V, 2.7 V, V

= V

or GND, I

I/O

= 0 V, Switch ON or OFF 30 µA

Supply current (low

power mode)

= 3.6 V, 2.7 V, V

= V

or GND, Switch disabled, OE in high

state

1 µA

ΔI

(4)

Supply-current

change, control inputs

One input at 1.8 V,

Other inputs at V

GND

= 3.6 V 20

µA

= 2.7 V 0.5

Input capacitance,

control inputs

= 3.3 V, 2.5 V, V

= V

or 0 V 1.5 2.5 pF

io(OFF)

OFF capacitance V

= 3.3 V, 2.5 V, V

I/O

= V

or 0 V, Switch OFF 3.5 5 pF

io(ON)

ON capacitance V

= 3.3 V, 2.5 V, V

I/O

= V

or 0 V, Switch ON 6 7.5 pF

(5)

ON-state resistance V

= 3 V, 2.3 V

= 0 V, I

= 30 mA

= 25°C

3 6

= 2.4 V, I

= –15

3.4 6

= 0 V, I

= 30 mA

= 125°C

6 10

= 2.4 V, I

= –15

10 16

ΔR

ON-state resistance

match between

channels

= 3 V, 2.3 V

= 0 V, I

= 30 mA 0.2

= 1.7, I

= –15 mA 0.2

ON(flat)

ON-state resistance

flatness

= 3 V, 2.3 V

= 0 V, I

= 30 mA 1

= 1.7, I

= –15 mA 1

6.6 Dynamic Electrical Characteristics: V

= 3.3 V

over operating range, T

= –40°C to 125°C, V

= 3.3 V ±10%, GND = 0 V

PARAMETER TEST CONDITIONS TYP UNIT

TALK

Crosstalk R

= 50 , f = 250 MHz –40 dB

IRR

OFF isolation R

= 50 , f = 250 MHz –41 dB

BW Bandwidth (–3 dB) R

= 50 0.9 GHz

TS3USB221A-Q1

SCDS300E –JULY 2010–REVISED JUNE 2020

www.ti.com

Product Folder Links: TS3USB221A-Q1

6.7 Dynamic Electrical Characteristics: V

= 2.5 V

over operating range, T

= –40°C to 125°C, V

= 2.5 V ±10%, GND = 0 V

PARAMETER TEST CONDITIONS TYP UNIT

TALK

Crosstalk R

= 50 , f = 250 MHz –39 dB

IRR

OFF isolation R

= 50 , f = 250 MHz –40 dB

BW Bandwidth (3 dB) R

= 50 0.9 GHz

(1) For Max or Min conditions, use the appropriate value specified under Dynamic Electrical Characteristics: V

= 3.3 V for the applicable

device type.

(2) Specified by design

(3) The bus switch contributes no propagational delay other than the RC delay of the on resistance of the switch and the load capacitance.

The time constant for the switch alone is of the order of 0.25 ns for 10-pF load. Since this time constant is much smaller than the rise

and fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch, when

used in a system, is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven

side.

6.8 Switching Characteristics: V

= 3.3 V

over operating range, T

= –40°C to 125°C, V

= 3.3 V ±10%, GND = 0 V

PARAMETER MIN TYP

(1)

MAX UNIT

Propagation delay

(2) (3)

0.25 ns

Line enable time

S to D, nD 30

OE to D, nD 17

OFF

Line disable time

S to D, nD 12

OE to D, nD 10

SK(O)

Output skew between center port to any other port

(2)

0.1 0.2 ns

SK(P)

Skew between opposite transitions of the same output (t

PHL

– t

PLH

)

(2)

0.1 0.2 ns

(1) For Max or Min conditions, use the appropriate value specified under Dynamic Electrical Characteristics: V

= 2.5 V for the applicable

device type.

(2) Specified by design

(3) The bus switch contributes no propagational delay other than the RC delay of the on resistance of the switch and the load capacitance.

The time constant for the switch alone is of the order of 0.25 ns for 10-pF load. Since this time constant is much smaller than the rise/fall

times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch, when used in

a system, is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side.

6.9 Switching Characteristics: V

= 2.5 V

over operating range, T

= –40°C to 125°C, V

= 2.5 V ±10%, GND = 0 V

PARAMETER MIN TYP

(1)

MAX UNIT

Propagation delay

(2) (3)

0.25 ns

Line enable time

S to D, nD 50

OE to D, nD 32

OFF

Line disable time

S to D, nD 23

OE to D, nD 12

SK(O)

Output skew between center port to any other port

(2)

0.1 0.2 ns

SK(P)

Skew between opposite transitions of the same output (t

PHL

– t

PLH

)

(2)

0.1 0.2 ns

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