参数资料
型号: MAX4679EUE+T
厂商: Maxim Integrated Products
文件页数: 11/12页
文件大小: 0K
描述: IC SWITCH QUAD SPST 16TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
功能: 开关
电路: 4 x SPST - NC/NO
导通状态电阻: 1.6 欧姆
电压电源: 单/双电源
电压 - 电源,单路/双路(±): 2.7 V ~ 11 V,±2.7 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 带卷 (TR)
MAX4677/MAX4678/MAX4679
2
, Quad, SPST, CMOS Analog Switches
8
_______________________________________________________________________________________
___________Applications Information
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings because stresses beyond the listed ratings
can cause permanent damage to the devices. Always
sequence V+ on first, then V-, then VL followed by the
logic inputs, NO_, NC_, or COM. If proper power-supply
sequencing is not possible, add two small signal diodes
(D1, D2) in series with the supply pins, and a Schottky
diode between V+ and VL for overvoltage protection
(Figure 1). Adding diodes reduces the analog signal
range to one diode drop below V+ and one diode drop
above V-, but does not affect the devices’ low switch
resistance and low leakage characteristics. Device oper-
ation is unchanged, and the difference between V+ and
V- should not exceed 11V.
Power-supply bypassing improves noise margin and
prevents switching noise from propagating from the V+
supply to other components. A 0.1F capacitor connect-
ed from V+ to GND is adequate for most applications.
Figure 1. Overvoltage Protection Using External Blocking Diodes
COM_
V2
V-
V+
NO_
VL
D1
D2
*
*INTERNAL PROTECTION DIODES
MAX4677
MAX4678
MAX4679
tr < 20ns
tf < 20ns
50%
0
LOGIC
INPUT
V-
RL
300
NO_
OR NC_
GND
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
VOUT = VCOM
(
RL
)
RL + RON
SWITCH
INPUT
IN_
+3V
tOFF
0
COM_
SWITCH
OUTPUT
0.9 x V0UT
0.9 x VOUT
tON
VOUT
SWITCH
OUTPUT
LOGIC
INPUT
CL
35pF
V+
VL
VOUT
VCOM
0V
MAX4677
MAX4678
MAX4679
Figure 2. Switching Time
50%
0.9 x V0UT1
+3V
0
LOGIC
INPUT
SWITCH
OUTPUT 2
(VOUT2)
0
0.9 x VOUT2
tD
LOGIC
INPUT
V-
RL2
GND
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
COM2
IN1
COM1
VOUT2
V+
CL2
VCOM1 = +3V
RL1
VOUT1
CL1
RL = 300
CL = 35pF
NO1
NC2
SWITCH
OUTPUT 1
(VOUT1)
MAX4679
VCOM2 = +3V
V+
VL
IN2
Figure 3. Break-Before-Make Interval (MAX4679 Only)
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