1.1 引脚排列图 1-1 引脚分布

CH334U

QSOP28

CH334U is a USB2.0 compliant 4-port USB HUB controller supporting MTT mode, industrial temperature -40~85°C, QSOP28 package, with built-in LDO and high-precision clock.Checked against the datasheet

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Technical parameters

Datasheet-verified parameters

26 items

Parameter	Value and test conditions	Source
Package	QSOP28
Operating Temperature	-40 ~ 85 °C
Storage Temperature	-55 ~ 150 °C
LDO Input Supply Voltage	Min: 4.5 V, Typ: 5.0 V, Max: 5.25 V (启用内部LDO)
LDO Output Voltage	Min: 3.2 V, Typ: 3.3 V, Max: 3.5 V (启用内部LDO)
LDO Max Load Current	Max: 20 mA
Operating Current (Upstream HS, 4 Downstream HS)	Typ: 85 mA
Operating Current (Upstream HS, 1 Downstream HS)	Typ: 42 mA
Operating Current (Upstream HS, 4 Downstream FS)	Typ: 25 mA
Operating Current (Upstream HS, 1 Downstream FS)	Typ: 21 mA
Operating Current (Upstream FS, 4 Downstream FS)	Typ: 20 mA
Operating Current (Upstream HS, No Downstream Device)	Typ: 0.3 mA
Sleep Current	Typ: 0.12 mA, Max: 0.4 mA (不含1.5KΩ上拉)
Low Level Input Voltage	Min: 0 V, Max: 0.8 V
High Level Input Voltage	Min: 2.0 V, Max: VDD33 V
RESET# Low Level Input Voltage	Min: 0 V, Max: 0.75 V
ESD Voltage	6K V (HBM, USB信号引脚)
Absolute Maximum Rating - V5	Min: -0.4 V, Max: 5.5 V
Absolute Maximum Rating - VDD33	Min: -0.4 V, Max: 4.0 V
TT Mode	MTT
Overcurrent Detection	GANG 模式
Power Control	GANG 模式
LED Indicator	5 灯
I/O Pin Power Mode Configuration	✓
External EEPROM Configuration	✓
Crystal-less Application	可选

All parameters (7)ExpandCollapse

Environment and package
封装类型1	QSOP
最大工作温度	85℃
最小工作温度	-40℃
Other
BC1.1协议	0
BC1.2协议	0
PD协议	0
引脚数量1	28

Pinout and package

Pin	Name	Function
1	PSELF	(Self-powered/Bus-powered configuration)
2	NC	(No Connection)
3	RESET#/CDP	(Reset/Charging Downstream Port)
4	DPU	(Upstream Data Plus)
5	DMU	(Upstream Data Minus)
6	V5	(5V Power Input)
7	VDD33	(3.3V Power Output/Input)
8	LED4/SDA	(LED4/I2C SDA)
9	DP1	(Downstream Port 1 Data Plus)
10	DM1	(Downstream Port 1 Data Minus)
11	LED1	(LED1)
12	DP2	(Downstream Port 2 Data Plus)
13	DM2	(Downstream Port 2 Data Minus)
14	LED2	(LED2)
15	PWREN#	(Power Enable)
16	GND	(Ground)
17	OVCUR#	(Overcurrent Detection)
18	GND	(Ground)
19	NC	(No Connection)
20	XO	(Crystal Output)
21	XI	(Crystal Input)
22	DM4	(Downstream Port 4 Data Minus)
23	DP4	(Downstream Port 4 Data Plus)
24	GND	(Ground)
25	DM3	(Downstream Port 3 Data Minus)
26	DP3	(Downstream Port 3 Data Plus)
27	VDD33	(3.3V Power Output/Input)
28	GND	(Ground)

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