________________________________
概述
MAX4854
四路、单刀/单掷
(SPST)
开关采用
+2V至+5.5V
单电源供电，能够处理大于电源摆幅的信号。该开关具
有7Ω的低导通电阻和
30pF
导通电容，可理想用于数据信
号切换。
对于超摆幅应用，超过正电源的信号(高达
+5.5V)
仍可以
无失真地通过开关。
MAX4854
采用节省空间的、16引脚、
3mm x 3mm
薄型
QFN
封装，工作在
-40°C至+85°C
的扩展级温度范围。
____________________________________________
应用
USB
开关
蜂窝电话
笔记本电脑
PDA
及其它手持式设备
________________________________
特性
♦
USB 2.0
全速 (
12Mbps
) 和
USB 1.1
信号开关
♦
可切换大于
V
CC
的信号
♦
7Ω
导通电阻
♦
30pF
导通电容
♦
-3dB
带宽：
150MHz
♦
兼容
1.8V
逻辑电平
♦
+2V至+5.5V
电源范围
♦
0.01µA
低电源电流
♦
采用节省空间的、
3mm x 3mm、16
引脚
TQFN
封装
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
TOP VIEW
16
1
2
3
4
12
11
10
9
15 14 13
5678
COM1
IN1
VCCIN4
COM4
N.C.
NO4
IN3
N.C.
IN2
COM2
NO2
GND
NO3
COM3
NO1
MAX4854
3mm x 3mm THIN QFN
CONNECT EXPOSED PADDLE TO PC BOARD GROUND.
____________________________
引脚配置
____________________________
定购信息
MAX4854
NO1
COM1
IN1
7Ω
NO2
COM2
IN2
7Ω
NO3
COM3
IN3
7Ω
NO4
COM4
IN4
7Ω
TRUTH TABLE
SWITCHES SHOWN
FOR LOGIC "0" INPUT
IN_
0
1
NO_
OFF
ON
________________________
方框图/真值表
19-3472; Rev 0; 10/04
*
EP =
裸露焊盘。
本文是
Maxim
正式英文资料的译文，
Maxim
不对翻译中存在的差异或由此产生的错误负责。请注意译文中可能存在文字组织或
翻译错误，如需确认任何词语的准确性，请参考
Maxim
提供的英文版资料。
索取免费样品和最新版的数据资料，请访问
Maxim
的主页：
www.maxim-ic.com.cn
。
________________________________________________________________ Maxim Integrated Products 1
PART TEMP RANGE
MAX4854ETE -40°C to +85°C 16 TQFN-EP* ACE
PINPACKAGE
TOP
MARK
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless otherwise noted.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCC, IN_, COM_, NO_ to GND (Note 1) ................-0.3V to +6.0V
Closed-Switch Continuous Current COM_, NO_, NC_ .....±50mA
Peak Current COM_, NO_
(pulsed at 1ms, 50% duty cycle)................................±100mA
Peak Current COM_, NO_
(pulsed at 1ms, 10% duty cycle)................................±120mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Thin QFN (derate 20.8mW/°C above +70°C) ....1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Signals on IN_, NO_, or COM_ below GND are clamped by internal diodes. Limit forward-diode current to maximum current
rating.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
Supply Current I
ANALOG SWITCH
Analog Signal Range
On-Resistance R
On-Resistance Match
Between Channels
(Notes 3, 4)
On-Resistance
Flatness (Note 5)
NO_ Off-Leakage
Current
COM_ On-Leakage
Current
DYNAMIC CHARACTERISTICS
Skew (Note 3) t
Propagation Delay
(Note 3)
Turn-On Time t
Turn-Off Time t
Charge Injection Q V
Off-Isolation ( N ote 6) f = 100kH z, V
Crosstalk f = 1MHz, V
-3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF, Figure 4 150 MHz
CC
CC
V
,
NO_
V
COM_
ON
∆R
ON
R
FLAT
I
OFF
I
ON
SKEWRS
t
PD
ON
OFF
VCC = +5.5V, V
VCC = +3V, I
V
= 0 to +5.5V
NO_
VCC = +3V, I
V
= +1.5V
NO_
VCC = +3V; I
= +1V, +2V, +3V
V
NO_
VCC = +5.5V, V
V
= +4.5V or +1V
COM_
VCC = +5.5V; V
floating; V
RS = 39Ω, CL = 50pF, Figure 2 0.9 2 ns
VCC = +3V, V
R
L
VCC = +3V, V
R
L
COM_
COM_
= 39Ω, CL = 50pF, Figure 2 0.1 1 ns
= 300Ω, CL = 50pF, Figure 1
= 300Ω, CL = 50pF, Figure 1
= +1.5V, RS = 0Ω, CL = 1nF, Figure 3 8 pC
= 0 or V
IN_
= 10mA,
COM_
= 10mA,
COM
= 10mA;
COM_
NO_
NO_
= +1V, +4.5V, or floating
= +1.5V,
NO_
= +1.5V,
NO_
= 1V
C OM _
= 1V
COM_
CC
= +1V or +4.5V,
= +1V, +4.5V, or
, RL = 50Ω , C L = 5p F, Fi g ur e 4 -80 dB
RM S
, RL = 50Ω, CL = 5pF, Figure 4 -95 dB
RMS
TA = +25°C 7 9
T
= -40°C to +85°C 10
A
TA = +25°C 0.2 0.4
T
= -40°C to +85°C 0.5
A
TA = +25°C 2.5 3.75
T
= -40°C to +85°C 4.0
A
TA = +25°C - 2 +2
T
= -40°C to +85°C -10 +10
A
TA = +25°C - 2 +2
T
= -40°C to +85°C - 12.5 +12.5
A
TA = +25°C 40 60
T
= -40°C to +85°C 100
A
TA = +25°C 30 40
T
= -40°C to +85°C 60
A
2.0 5.5 V
0.01 1 µA
0 5.5 V
Ω
Ω
Ω
nA
nA
ns
ns
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless otherwise noted.) (Note 2)
Note 2: Specifications are 100% tested at T
A
= +85°C only, and guaranteed by design and characterization over the specified tem-
perature range.
Note 3: Guaranteed by design and characterization; not production tested.
Note 4: ∆R
ON
= R
ON(MAX)
- R
ON(MIN)
.
Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 6: Off-isolation = 20log
10
(V
COM_
/ V
NO_
), V
COM_
= output, V
NO_
= input to off switch.
_______________________________________________________________
典型工作特性
(VCC= 3.0V, TA= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
MAX4854 toc01
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
5
10
15
20
25
30
35
40
45
0
06
VCC = 1.8V
VCC = 2.0V
VCC = 2.3V
VCC = 2.5V
VCC = 3.0V
VCC = 5.0V
ON-RESISTANCE vs. COM VOLTAGE
MAX4854 toc02
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
3
4
5
6
7
8
2
06
VCC = 3.0V
TA = +85°C
TA = +25°C
TA = -40°C
ON-RESISTANCE vs. COM VOLTAGE
MAX4854 toc03
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
541 2 3
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.5
06
VCC = 5.0V
TA = +85°C
TA = +25°C
TA = -40°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
NO_ Off-Capacitance C
COM On-Capacitance C
Total Harmonic
Distortion
THD f = 20Hz to 20kHz, V
DIGITAL I/O (IN_)
Input Logic High
Voltage
Input Logic Low
Voltage
V
V
Input Leakage
f = 1MHz, Figure 5 13 pF
OFF
f = 1MHz, Figure 5 30 pF
ON
= 1V +2V
COM_
VCC = +2V to +3.6V 1.4
IH
VCC = +3.6V to +5.5V 1.8
VCC = +2V to +3.6V 0.5
IL
VCC = +3.6V to +5.5V 0.8
V
I
IN
= 0 or +5.5V -0.5 +0.5 µA
IN_
, RL = 600Ω 0.04 %
P-P
V
V
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
4 _______________________________________________________________________________________
____________________________________________________________
典型工作特性(续
)
(VCC= 3.0V, TA= +25°C, unless otherwise noted.)
0.2
0.4
0.6
0.8
1.0
0
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4854 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
5.04.54.03.53.02.52.01.5 5.5
TA = -40°C
TA = +25°C
TA = +85°C
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4854 toc05
SUPPLY VOLTAGE (V)
TURN-ON/TURN-OFF TIME (ns)
4.53.52.5
10
20
30
40
50
60
0
1.5 5.5
t
ON
t
OFF
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4854 toc06
TEMPERATURE (°C)
TURN-ON/TURN-OFF TIME (ns)
603510-15
22
24
26
28
30
32
34
20
-40 85
t
OFF
t
ON
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4854 toc07
SUPPLY VOLTAGE (V)
LOGIC THRESHOLD (V)
4.53.52.5
0.8
1.0
1.2
1.4
1.6
0.6
1.5 5.5
VIN RISING
VIN FALLING
CHARGE INJECTION vs. COM VOLTAGE
MAX4854 toc08
COM VOLTAGE (V)
CHARGE INJECTION (pC)
4321
10
20
30
0
05
VCC = 3V
VCC = 5V
LEAKAGE CURRENT vs. TEMPERATURE
MAX4854 toc09
TEMPERATURE (°C)
LEAKAGE CURRENT (nA)
6035-15 10
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
-40 85
COM ON-LEAKAGE
COM OFF-LEAKAGE
FREQUENCY RESPONSE
MAX4854 toc10
FREQUENCY (MHz)
FREQUENCY RESPONSE (dB)
100101
-80
-60
-40
-20
0
20
-100
0.1 1000
ON-RESPONSE
OFF-RESPONSE
CROSSTALK
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4854 toc11
FREQUENCY (Hz)
THD (%)
10k1k100
0.1
10 100k
1
0.01
RL = 600Ω
SWITCH PASSING SIGNALS
ABOVE SUPPLY VOLTAGE
MAX4854 toc12
V
NC
2V/div
0V
V
COM
0V
200µs/div
VCC = 3.0V
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
_______________________________________________________________________________________ 5
___________________________________________________________________
引脚说明
PIN NAME FUNCTION
1 NO1 Normally Open Terminal for Analog Switch 1
2, 11 N.C. No Connection. Not internally connected.
3 IN2
Digital Control Input for Analog Switch 2. A logic-low on IN2 disconnects COM2 from NO2 and a
logic-high connects COM2 to NO2.
4 COM2 Common Terminal for Analog Switch 2
5 NO2 Normally Open Terminal for Analog Switch 2
6 GND Ground
7 NO3 Normally Open Terminal for Analog Switch 3
8 COM3 Common Terminal for Analog Switch 3
9 IN3
Digital Control Input for Analog Switch 3. A logic-low on IN3 disconnects COM3 from NO3 and a
logic-high connects COM3 to NO3.
10 NO4 Normally Open Terminal for Analog Switch 4
12 COM4 Common Terminal for Analog Switch 4
13 IN4
Digital Control Input for Analog Switch 4. A logic-low on IN4 disconnects COM4 from NO4 and a
logic-high connects COM4 to NO4.
14 V
CC
Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.
15 IN1
Digital Control Input for Analog Switch 1. A logic-low on IN1 disconnects COM1 from NO1 and a
logic-high connects COM1 to NO1.
16 COM1 Common Terminal for Analog Switch 1
EP GND Exposed Pad. Connect to ground.
引脚
名称 功能
模拟开关1的常开端
未接。内部无连接。
模拟开关2的数字控制输入。
IN2
为逻辑低时关断
COM2和NO2；IN2
为逻辑高时接通
COM2
和
NO2
。
模拟开关2的公共端
模拟开关2的常开端
地
模拟开关3的常开端
模拟开关3的公共端
模拟开关3的数字控制输入。
IN3
为逻辑低时关断
COM3和NO3；IN3
为逻辑高时接通
COM3
和
NO3
。
模拟开关4的常开端
模拟开关4的公共端
模拟开关4的数字控制输入。
IN4
为逻辑低时关断
COM4和NO4；IN4
为逻辑高时接通
COM4
和
NO4
。
电源电压。用一个尽可能靠近该引脚的
0.01µF
电容旁路至
GND
。
模拟开关1的数字控制输入。
IN1
为逻辑低时关断
COM1和NO1；IN1
为逻辑高时接通
COM1
和
NO1
。
模拟开关1的公共端
裸露焊盘。接地。
MAX4854
____________________________
详细说明
MAX4854
是低导通电阻、低电压模拟开关，设计工作在
+2V至+5.5V
单电源，并且完全规范于电源标称值为
+3.0V
的应用。该器件具有超摆幅信号处理能力，在电源
电压降至
+2.0V
时，仍然允许高达
+5.5V
的信号无失真地
通过。
该四路
SPST
开关具有低导通电容，能够切换
USB 2.0/1.1
应用中
(12Mbps)
的数据信号。它设计用来切换
USB
的
D+和D-
信号，并能保证在输入信号的
50%
和输出信号的
50%
处测量的偏差小于
1ns
(见图2)。
_______________________________________
应用信息
数字控制输入
逻辑输入 (
IN_
) 可接受高达
+5.5V
的电压，即使电源电压
低于该电平。例如，
V
CC
电源为
+3.3V
时，
IN_
可以低至
GND
，也可以高达
+5.5V
，这样就允许多种逻辑电平共
存于同一系统中。满摆幅驱动
IN_
可使功耗降至最低。对
于
+2V
电源电压，逻辑门限值为
+0.5V
(低) 和
+1.4V
(高)；
对于
+5V
电源电压，逻辑门限值为
+0.8V
(低) 和
+1.8V
(高)。
模拟信号电平
当模拟输入信号在整个电源电压范围内变化时，这些开
关的导通电阻变化极小 (见
典型工作特性
)。这些开关都是
双向的，因此
NO_和COM_
既能做输入也能做输出。
供电顺序
警告：加载电压不要超过极限参数，因为超过列出的极
限参数可能引起器件永久损坏。
对于所有
CMOS
器件，推荐使用正确的供电顺序。总是
在加模拟信号之前先加
V
CC
，特别是在模拟信号没有限
流的情况下。
7Ω
、四路
SPST
开关，
可处理超摆幅信号
6 _______________________________________________________________________________________
________________________________________________________________
典型工作电路
NO1
D+
DATA SOURCE
1 (USB)
DATA SOURCE
2 (USB)
D-
NO2
NO3
D+
D-
NO4
7Ω
7Ω
MAX4854
7Ω
7Ω
COM1
IN1
COM2
IN2
COM3
IN3
COM4
IN4
DATA 1 ENABLE
D+
D-
USB
CONNECTOR
DATA 2 ENABLE
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
_______________________________________________________________________________________ 7
图
1.
开关时间
_____________________________________________________________
测试电路/时序图
图
2. 输入/
输出偏差时序图
MAX4854
LOGIC
INPUT
TxD+
V
NO
V
CC
V
CC
NO_
IN_
GND
C
INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
OUT
= V
NO (
R
R
s
V
RL + R
L
ON
COM_
R
)
A
B
V
CC
LOGIC
INPUT
10%
90%
0V
V
OUT
0V
t
ri
t
fi
V
OUT
L
C
L
INPUT A
C
L
INPUT A-
SWITCH
OUTPUT
50%
50%
90%
t
skew_i
10%
50%
t
ON
0.9 x V
tR < 20ns
tF < 20ns
t
OFF
0.9 x V
0UT
OUT
TxD-
Rs = 39Ω
= 50pF
C
L
DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.
|
|t
ro - tri
|t
|
DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
fo - tfi
|t
|
CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.
skew_o
|t
|
CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
skew_i
A-
R
s
B-
C
L
OUTPUT B
OUTPUT B-
10%
90%
t
ro
50%
t
fo
50%
90%
t
skew_o
10%
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
8 _______________________________________________________________________________________
__________________________________________________________
测试电路/时序图(续
)
图
3.
电荷注入
图
4.
导通损耗、关断隔离和串扰
V
IN_
CC
V
CC
COM_
TO V
V
IL
IH
V
IN
V
OUT
V
OUT
C
L
50Ω
MEAS REF
50Ω 50Ω
NETWORK
ANALYZER
V
OUT
OFF
IN
50Ω
MAX4854
V
GEN
0V OR V
CC
R
IN_
GEN
NO_
GND
+5V
V
CC
MAX4854
GND
10nF
COM1
NO1*
∆V
ON
Q = (∆V
)(CL)
OUT
OFF-ISOLATION = 20log
ON-LOSS = 20log
CROSSTALK = 20log
OUT
OFF
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND ON NO_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*FOR CROSSTALK, THIS PIN IS NO2.
COM2 IS OPEN.
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
_______________________________________________________________________________________ 9
图
5.
通道关/开电容
____________________________
芯片信息
TRANSISTOR COUNT: 735
PROCESS: CMOS
___________________
测试电路/时序图(续
)
10nF
V
COM_
CAPACITANCE
METER
f = 1MHz
NO_
GND
V
CC
CC
MAX4854
IN
V
IL
OR V
IH
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
10 ______________________________________________________________________________________
___________________________________________________________________
封装信息
(本数据资料提供的封装图可能不是最近的规格，如需最近的封装外型信息，请查询 www.maxim-ic.com.cn/packages。)
C
L
0.10 C 0.08 C
D2
D
D/2
E/2
E
C
L
A
A2
A1
L
(NE - 1) X e
C
L
e
D2/2
e
0.10 M C A B
b
k
(ND - 1) X e
C
L
e
E2/2
E2
L
L
12x16L QFN THIN.EPS
PACKAGE OUTLINE
12, 16L, THIN QFN, 3x3x0.8mm
21-0136
1
E
2
MAX4854
7Ω
、四路
SPST
开关，
可处理超摆幅信号
Maxim不对Maxim
产品以外的任何电路使用负责，也不提供其专利许可。
Maxim
保留在任何时间、没有任何通报的前提下修改产品资料和规格的权利。
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2004 Maxim Integrated Products Printed USA
是
Maxim Integrated Products, Inc.
的注册商标。
_______________________________________________________________
封装信息(续
)
(本数据资料提供的封装图可能不是最近的规格，如需最近的封装外型信息，请查询 www.maxim-ic.com.cn/packages。)
MAXIM
北京办事处
北京
8328
信箱 邮政编码
100083
免费电话：
800 810 0310
电话：
010-6201 0598
传真：
010-6201 0298
EXPOSED PAD VARIATIONS
NOTES:
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO
JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED
WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
DOWN
BONDS
ALLOWED
PACKAGE OUTLINE
12, 16L, THIN QFN, 3x3x0.8mm
21-0136
2
E
2
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