TI TS3USB221：高速USB2.0信号1:2多路复用器数据手册
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更新于2024-06-28
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TI-TS3USB221是一款高性能的USB 2.0 (480Mbps) 1:2多路复用器，专为电话和消费电子应用设计，如手机、数码相机和配备集线器的笔记本电脑。它具备以下关键特性：
1. 工作电压范围：该器件支持宽广的VCC工作电压，即2.3V至3.6V，确保了在各种电源条件下稳定运行。
2. 信号兼容性：TS3USB221的VI/O引脚可以处理高达5.5V的输入信号，适用于不同电压环境的信号传输。
3. 低功耗模式：当OE（输出使能）功能被禁用时，设备进入低功耗状态，功耗低至1μA，有助于节省能源。
4. 电气性能：开关导通电阻rON最大值为6Ω，典型值为0.2Ω，具有高带宽，可达1.1GHz，减少了信号在传输过程中的失真。
5. 接口能力：除了USB 2.0信号处理外，TS3USB221还适用于USB 1.0、1.1标准，以及移动行业处理器接口（MIPI™）和MHL 1.0协议。
6. 封装与尺寸：文档未提供具体封装型号，但提到了封装选项，这对于实际设计选择非常重要。
7. ESD保护：器件具有人体放电模型（HBM）的ESD保护，可以抵御高达2000V的静电放电，确保信号传输的安全性。
8. 信号衰减与隔离：TS3USB221作为双向开关，输出端的高速信号具有极低或无衰减，同时提供了高位间偏移和高通道间噪声隔离，保证了信号质量。
9. 文档策略：尽管文档是中文版，但强调用户应参考TI官方网站www.ti.com上最新的英文版数据表（SCDS220）获取最准确和全面的产品信息，因为英文版始终是最新的权威来源。
在实际设计项目中，设计师需确保在使用TS3USB221前查阅并理解最新的英文技术规格，因为翻译可能存在不精确之处。此外，考虑到产品可能面临的严苛环境和标准要求，评估ESD保护等级、带宽限制、功耗以及信号传输质量等因素是非常关键的步骤。
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TS3USB221
ZHCSJ98J –NOVEMBER 2006–REVISED JANUARY 2019
www.ti.com.cn
Copyright © 2006–2019, Texas Instruments Incorporated
(1) For Maximum or Minimum conditions, use the appropriate value specified under Electrical Characteristics for the applicable device type.
6.6 Dynamic Electrical Characteristics, V
CC
= 3.3 V ± 10%
over operating range, T
A
= –40°C to 85°C, V
CC
= 3.3 V ± 10%, GND = 0 V
PARAMETER TEST CONDITIONS TYP
(1)
UNIT
X
TALK
Crosstalk R
L
= 50 Ω, f = 250 MHz –40 dB
O
IRR
OFF isolation R
L
= 50 Ω, f = 250 MHz –41 dB
BW Bandwidth (–3 dB) R
L
= 50 Ω 1.1 GHz
(1) For Maximum or Minimum conditions, use the appropriate value specified under Electrical Characteristics for the applicable device type.
6.7 Dynamic Electrical Characteristics, V
CC
= 2.5 V ± 10%
over operating range, T
A
= –40°C to 85°C, V
CC
= 2.5 V ± 10%, GND = 0 V
PARAMETER TEST CONDITIONS TYP
(1)
UNIT
X
TALK
Crosstalk R
L
= 50 Ω, f = 250 MHz –39 dB
O
IRR
OFF isolation R
L
= 50 Ω, f = 250 MHz –40 dB
BW Bandwidth (–3 dB) R
L
= 50 Ω 1.1 GHz
(1) For Maximum or Minimum conditions, use the appropriate value specified under Electrical Characteristics 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. This time constant adds very little propagational delay to
the system because it is much smaller than the rise/fall times of typical driving signals. 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
CC
= 3.3 V ± 10%
over operating range, T
A
= –40°C to 85°C, V
CC
= 3.3 V ± 10%, GND = 0 V
PARAMETER MIN TYP
(1)
MAX UNIT
t
pd
Propagation delay
(2) (3)
0.25 ns
t
ON
Line enable time
S to D, nD 30
ns
OE to D, nD 17
t
OFF
Line disable time
S to D, nD 12
ns
OE to D, nD 10
t
SK(O)
Output skew between center port to any other port
(2)
0.1 0.2 ns
t
SK(P)
Skew between opposite transitions of the same output (t
PHL
– t
PLH
)
(2)
0.1 0.2 ns
(1) For Maximum or Minimum conditions, use the appropriate value specified under Electrical Characteristics 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. The time constraint adds very little propagational delay
to the system because it is much smaller than the rise and fall times of typical driving signals. 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
CC
= 2.5 V ± 10%
over operating range, T
A
= –40°C to 85°C, V
CC
= 2.5 V ± 10%, GND = 0 V
PARAMETER MIN TYP
(1)
MAX UNIT
t
pd
Propagation delay
(2) (3)
0.25 ns
t
ON
Line enable time
S to D, nD 50
ns
OE to D, nD 32
t
OFF
Line disable time
S to D, nD 23
ns
OE to D, nD 12
t
SK(O)
Output skew between center port to any other port
(2)
0.1 0.2 ns
t
SK(P)
Skew between opposite transitions of the same output (t
PHL
– t
PLH
)
(2)
0.1 0.2 ns
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