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MAX395CWG+ |MAX395CWGMAXIMN/a14avaiSerially Controlled, Low-Voltage, 8-Channel SPST Switch
MAX395EAGMAXN/a71avaiSerially Controlled, Low-Voltage, 8-Channel SPST Switch


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MAX395CWG+-MAX395EAG
Serially Controlled, Low-Voltage, 8-Channel SPST Switch
_______________General Description
The MAX395 8-channel, serially controlled, single-pole/sin-
gle-throw (SPST) analog switch offers eight separately
controlled switches. The switches conduct equally well in
either direction. On-resistance (100Ωmax) is matched
between switches to 5Ωmax and is flat (10Ωmax) over
the specified signal range.
These CMOS devices can operate continuously with
dual power supplies ranging from ±2.7V to ±8V or a
single supply between +2.7V and +16V. Each switch
can handle rail-to-rail analog signals. The off leakage
current is only 0.1nA at +25°C or 5nA at +85°C.
Upon power-up, all switches are off, and the internal shift
registers are reset to zero. The MAX395 is electrically
equivalent to two MAX391 quad switches controlled by a
serial interface, and is pin compatible with the MAX335.
The serial interface is compatible with SPI™/QSPI™ and
Microwire™. Functioning as a shift register, it allows data
(at DIN) to be clocked in synchronously with the rising
edge of clock (SCLK). The shift register’s output (DOUT)
enables several MAX395s to be daisy chained.
All digital inputs have 0.8V to 2.4V logic thresholds, ensur-
ing both TTL- and CMOS-logic compatibility when using
±5V supplies or a single +5V supply.
________________________Applications

Serial Data-Acquisition Industrial and Process-
SystemsControl Systems
AvionicsATE Equipment
Audio Signal RoutingNetworking
____________________________Features
SPI™/QSPI™, Microwire™-Compatible Serial
Interface
8 Separately Controlled SPST Switches100ΩSignal Paths with ±5V SuppliesRail-to-Rail Signal HandlingAsynchronous RESETInput Pin Compatible with Industry-Standard MAX335±2.7V to ±8V Dual Supplies
+2.7V to +16V Single Supply
>2kV ESD Protection per Method 3015.7TTL/CMOS-Compatible Inputs (with +5V or
±5V Supplies)rially Controlled, Low-Voltage,-Channel SPST Switch
________________________________________________________________Maxim Integrated Products1

LATCH
NO0
COM0
8-BIT SHIFT REGISTER
CLOCK TRANSLATOR
CS TRANSLATOR
DIN
RESET
SCLK
NO7
COM7
PARALLEL REGISTER AND TRANSLATOR
DOUT
MAX395
________________Functional Diagram

SCLK
V+
DIN
GND
NO0
COM0
NO1
COM1
NO2
COM2
NO3
COM3
DIP/SO

TOP VIEW
MAX3951
10
11
24
23
22
21
20
19
18
17
16
15
14
CS
RESET
DOUT
V-
NO7
COM7
NO6
COM6
NO5
COM5
NO4
COM4
LOGIC
__________________Pin Configuration
Call toll free 1-800-998-8800 for free samples or literature.

19-0448; Rev 0; 11/95
PART

MAX395CNG
MAX395CWG
MAX395C/D0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGEPIN-PACKAGE

24 Narrow Plastic DIP
24 Wide SO
Dice*
______________Ordering Information

* Contact factory for dice specifications.
** Contact factory for availability.
MAX395ENG
MAX395EWG
MAX395MRG-55°C to +125°C
-40°C to +85°C
-40°C to +85°C24 Narrow Plastic DIP
24 Wide SO
24 Narrow CERDIP**
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
rially Controlled, Low-Voltage,-Channel SPST Switch_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual Supplies

(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
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.
Voltages Referenced to GND
V+...........................................................................-0.3V, +17V
V-............................................................................-17V, +0.3V
V+ to V-...................................................................-0.3V, +17V
SCLK, CS, DIN, DOUT, RESET.................-0.3V to (V+ + 0.3V)
NO, COM.................................................(V- - 2V) to (V+ + 2V)
Continuous Current into Any Terminal..............................±30mA
Peak Current, NO_ or COM_
(pulsed at 1ms,10% duty cycle)..................................±100mA
Continuous Power Dissipation (TA= +70°C)
Narrow Plastic DIP (derate 13.33mW/°C above +70°C)...1067mW
Wide SO (derate 11.76mW/°C above +70°C)...............941mW
Narrow CERDIP (derate 12.50mW/°C above +70°C)....1000mW
Operating Temperature Ranges
MAX395C_ G.......................................................0°C to +70°C
MAX395E_ G....................................................-40°C to +85°C
MAX395MRG..................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
CONDITIONSUNITSMINTYPMAX
(Note 1)SYMBOLPARAMETER
100V-V+VCOM, VNOAnalog Signal Range
V+ = 5V, V- = -5V,
VCOM= ±3V, INO= 1mA2.4VIHDIN, SCLK, CS, RESETInput
Voltage Logic Threshold High125RONCOM, NO On-Resistance
IDOUT= 0.8mA
VDIN, VSCLK,
VCS= 0.8V or 2.4V2.8V+VDOUTDOUT Output Voltage Logic High-10.031IIH, IILDIN, SCLK, CS, RESETInput
Current Logic High or Low0.8VILDIN, SCLK, CS, RESETInput
Voltage Logic Threshold Low
C, E, M= +25°C
C, E, M= +25°C5
C, E, M
V+ = 5V, V- = -5V,
VCOM= ±3V, INO= 1mAΩ10ΔRONCOM, NO On-Resistance Match
Between Channels (Note 2)= +25°C10
C, E, M
V+ = 5V, V- = -5V, INO= 1mA,
VCOM= -3V, 0V, 3VΩ15RFLAT(ON)COM, NO On-Resistance
Flatness (Note 2)= +25°C-0.10.0020.1
C, E, M
V+ = 5.5V, V- = -5.5V,
VCOM= -4.5V, VNO= 4.5V-1010= +25°C-0.10.0020.1
C, E, M
V+ = 5.5V, V- = -5.5V,
VCOM= 4.5V, VNO= -4.5V
INO(OFF)NO Off Leakage Current
(Note 3)= +25°C-0.10.0020.1
C, E, M
V+ = 5.5V, V- = -5.5V,
VCOM= -4.5V, VNO= 4.5V-1010= +25°C0.10.0020.1
C, E, M
V+ = 5.5V, V- = -5.5V,
VCOM= 4.5V, VNO= -4.5V
ICOM(OFF)COM Off Leakage Current
(Note 3)= +25°C-0.20.010.2
C, E, M
V+ = 5.5V, V- = -5.5V,
VCOM= VNO= ±4.5V-2020nAICOM(ON)COM On Leakage Current
(Note 3)
IDOUT= -1.6mA100SCLKHYST00.4VDOUTDOUT Output Voltage Logic Low
SCLK Input Hysteresis
C, E, M
C, E, M
C, E, M
C, E, M
C, E, M
C, E, M
ANALOG SWITCH
DIGITAL I/O
rially Controlled, Low-Voltage,-Channel SPST Switch_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)= +25°C200400
C, E, M= +25°C= +25°C
VCOM= VNO= GND,
f = 1MHz
CONDITIONS

From rising edge of CS= +25°C±3±8V+, V-Power-Supply Range= +25°C
C, E, M500tONTurn-On Time
C(ON)Switch On Capacitance= +25°CRL= 50Ω, CL= 15pF,
VNO= 1VRMS, f = 100kHz<-90dBVCTChannel-to-Channel Crosstalk
DIN = CS= SCLK = 0V or V+,
RESET= 0V or V+
DIN = CS= SCLK = 0V or V+,
RESET= 0V or V+= +25°C90400
C, E, MFrom rising edge of CSns500tOFFTurn-Off Time-10.11I-V- Supply Current720I+V+ Supply Current
UNITSMINTYPMAX
(Note 1)SYMBOLPARAMETER
= +25°C515= +25°C
From rising edge of CS10= +25°C2= +25°C
VNO= GND, f = 1MHz
tBBMBreak-Before-Make Delay= 1nF, VNO= 0V, RS= 0Ω
VCOM= GND, f = 1MHzCCOM(OFF)
CNO(OFF)
VCTE
COM Off Capacitance
NO Off Capacitance
Charge Injection (Note 4)VISOOff IsolationRL= 50Ω, CL= 15pF,
VNO= 1VRMS, f = 100kHz
C, E, M
C, E, M2
SWITCH DYNAMIC CHARACTERISTICS
POWER SUPPLY
rially Controlled, Low-Voltage,-Channel SPST Switch_______________________________________________________________________________________SCLK FrequencyfSCLK
RESETMinimum Pulse WidthtRW70nsTA= +25°C
Fall Time of DOUT (Note 4)tDF100ns20% of V+ to 70% of V+,= 10pFC, E, M
Allowable Fall Time at DIN, SCLK
(Note 4)tSCF2μs20% of V+ to 70% of V+,= 10pFC, E, M
Allowable Rise Time at DIN, SCLK
(Note 4)tSCR2μs20% of V+ to 70% of V+,= 10pFC, E, M
Rise Time of DOUT (Note 4)tDR100ns20% of V+ to 70% of V+,= 10pFC, E, M
DIN Data Valid after Falling SCLK
(Note 4)tDO400ns
Data Hold Time
Data Setup TimetDS20017ns
tDH0-1750% of SCLK to 10% of DOUT,= 10pF
SCLK Low Time
tCL
C, E, M
190ns= +25°C
C, E, M
C, E, M
PARAMETERSYMBOLMINTYPMAX
(Note 1)UNITS

C, E, M
SCLK High Time
CSLag TimetCSH2240ns
tCH190
CSLead Time
Cycle Time
tCH +tCL480
tCSS240ns
C, E, M2.1
MHz
C, E, M
C, E, M
C, E, M
C, E, M
CONDITIONS
SERIAL DIGITAL INTERFACE
TIMING CHARACTERISTICS—Dual Supplies (Figure 1)

(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 1:
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2:
ΔRON= RON(max)- RON(min). On-resistance match between channels and on-resistance flatness are guaranteed only with
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.
Note 3:
Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4:
Guaranteed by design.
Note 5:
Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6:
See Figure 6. Off isolation = 20log10VCOM/VNO, VCOM= output. NO = input to off switch.
Note 7:
Between any two switches. See Figure 3.
rially Controlled, Low-Voltage,-Channel SPST Switch_______________________________________________________________________________________5
ELECTRICAL CHARACTERISTICS—Single +5V Supply

(V+ = +4.5V to +5.5V, V- = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
SWITCH DYNAMIC CHARACTERISTICS
DIGITAL I/O
ANALOG SWITCH
VCOM,VNOAnalog Signal Range
COM, NO On-ResistanceRON225ΩV+ = 5V, VCOM= 3.5V,
INO= 1mAC, E, M
125175TA= +25°C
Channel-to-Channel Crosstalk
(Note 7)VCT<-90dBRL= 50Ω, CL= 15pF,
VNO= 1VRMS, f = 100kHzTA= +25°C
Off Isolation (Note 6)VISO-90dBRL= 50Ω, CL= 15pF,
VNO= 1VRMS, f = 100kHzTA= +25°C
SCLK Input HysteresisSCLKHYSTmV100C, E, M
DOUT Output Voltage Logic LowVDOUTV00.4IDOUT= 1.6mAC, E, M
COM Off Leakage Current
(Notes 4, 5)
-1010V+ = 5.5V, VCOM= 0V,
VNO= 4.5VC, E, M
-0.10.0020.1TA= +25°CICOM(OFF)-1010
V+ = 5.5V, VCOM= 4.5V,
VNO= 0VC, E, M
-0.10.0020.1TA= +25°C
NO Off Leakage Current
(Notes 4, 5)
-1010V+ = 5.5V, VCOM= 0V,
VNO= 4.5VC, E, M
-0.10.0020.1TA= +25°C
-2020C, E, M
-0.20.0020.2TA= +25°C
PARAMETERSYMBOLMINTYPMAX
(Note 2)UNITS

Charge Injection (Note 4)VCTE210pC
Turn-On TimetON200400ns
Turn-Off TimetOFF90400ns
INO(OFF)-1010
V+ = 5.5V, VCOM= 4.5V,
VNO= 0VC, E, M
-0.10.0020.1TA= +25°C
Break-Before-Make DelaytBBM15ns
From rising edge of CS
From rising edge of CS
From rising edge of CS
DIN, SCLK, CS, RESETInput
Voltage Logic Threshold Low
DIN, SCLK, CS, RESETInput
Current Logic High or LowIIH, IIL
VIL
500= 1nF, VNO= 0V, RS= 0Ω0.031VDIN, VSCLK,
VCS= 0.8V or 2.4VC, E, M
DOUT Output Voltage Logic High
DIN, SCLK, CS, RESETInput
Voltage Logic Threshold HighVIH
0.8V+= +25°C= +25°C= +25°C
VDOUT
C, E, M2.8V+
CONDITIONS
C, E, M= +25°C
C, E, M
C, E, M
IDOUT= -0.8mAC, E, MCOM On Leakage Current
(Notes 4, 5)ICOM(ON)
C, E, M
V+ = 5.5V,
VCOM = VNO= 4.5V
V+, V- Supply CurrentI+720μADIN = CS= SCLK = 0V or
V+, RESET= 0V or V+= +25°C
C, E, M30
POWER SUPPLY
rially Controlled, Low-Voltage,-Channel SPST Switch_______________________________________________________________________________________TIMING CHARACTERISTICS—Single +5V Supply (Figure 1)
(V+ = +4.5V to +5.5V, V- = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 1:
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2:
ΔRON= RON(max)- RON(min). On-resistance match between channels and on-resistance flatness are guaranteed only with
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.
Note 3:
Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4:
Guaranteed by design.
Note 5:
Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6:
See Figure 6. Off isolation = 20log10VCOM/VNO, VCOM= output. NO = input to off switch.
Note 7:
Between any two switches. See Figure 3.
SERIAL DIGITAL INTERFACESERIAL DIGITAL INTERFACE

Rise Time of DOUT (Note 4)tDR100ns20% of V+ to 70% of V+,= 10pFC, E, M
Allowable Fall Time at DIN,
SCLK (Note 4)tSCF2μs20% of V+ to 70% of V+, = 10pFC, E, M
Allowable Rise Time at DIN,
SCLK (Note 4)tSCR2μs20% of V+ to 70% of V+, = 10pFC, E, M
DIN Data Valid after Falling SCLK
(Note 4)tDO400ns
Data Hold Time (Note 4)
Data Setup Time (Note 4)tDS20017ns
tDH0-1750% of SCLK to 10% of
DOUT, CL= 10pF
SCLK Low Time (Note 4)
tCL
C, E, M
190ns= +25°C
C, E, M
C, E, M
PARAMETERSYMBOLMINTYPMAX
(Note 2)UNITS

C, E, M
SCLK High Time (Note 4)Lag Time (Note 4)tCSH2240ns
tCH190Lead Time (Note 4)
Cycle Time (Note 4)
SCLK FrequencyfSCLK2.1MHz
tCH +tCL480
tCSS240ns
C, E, M
C, E, M
C, E, M
C, E, M
C, E, M
CONDITIONS

C, E, M20% of V+ to 70% of V+, = 10pFns100tDFFall Time of DOUT (Note 4)
RESETMinimum Pulse WidthtRW70nsTA= +25°C
_______________________________________________________________________________________7
ELECTRICAL CHARACTERISTICS—Single +3V Supply

(V+ = +3.0V to +3.6V, V- = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
C, E
CONDITIONS
V+= +25°C270500
C, E, M
V+ = 3.0V, VCOM= 1.5V,
INO= 1mA2.4VIHDIN, SCLK, CS, RESETInput
Voltage Logic Threshold High
C, E
C, E
C, E, M
C, E, M
600= +25°C-0.10.0020.1
C, E, M
V+ = 3.0V, VCOM= 3V,
VNO= 0V-55
C, E, M
IDOUT= -1.6mA
IDOUT= 0.1mA
VDIN, VSCLK,
VCS= 0.8V or 2.4V2.8V+VDOUT
DOUT Output Voltage Logic High-10.031IIH, IILDIN, SCLK, CS, Input
Current Logic High or Low0.8VILDIN, SCLK, CS, RESETInput
Voltage Logic Threshold Low
100SCLKHYST00.4VDOUTDOUT Output Voltage Logic Low
SCLK Input Hysteresis
UNITSMINTYPMAX
(Note 2)SYMBOLPARAMETER
= +25°C-0.10.0020.1
C, E, M
V+ = 3.6V, VCOM= 0V,
VNO= 3V-55INO(OFF)NO Off Leakage Current
(Notes 4, 5)= +25°C
C, E, MFrom rising edge of CSns800tON260600Turn-On Time= +25°C= +25°CRL= 50Ω, CL= 15pF,
VNO= 1VRMS, f = 100kHz
CL= 1nF, VNO= 0V, RS= 0ΩpC210VCTE
Charge Injection (Note 4)
-90VISO= +25°CFrom rising edge of CS
Off Isolation (Note 6)15tBBMBreak-Before-Make Delay= +25°C
C, E, MFrom rising edge of CSns400tOFF90300Turn-Off Time= +25°C= +25°C= 50Ω, CL= 15pF,
VNO= 1VRMS, f = 100kHzdB<-90VCTChannel-to-Channel Crosstalk
(Note 7)20
C, E, M
DIN = CS= SCLK = 0V or V+,
RESET= 0V or 5VμA30I+V+ Supply Currentrially Controlled, Low-Voltage,-Channel SPST Switch= +25°C-0.10.0020.1
C, E, M
V+ = 3.6V, VCOM= 0V,
VNO= 3V-1010ICOM(ON)COM On Leakage Current
(Notes 4, 5)= +25°C-0.10.0020.1
C, E, M
V+ = 3.6V, VCOM= 3V,
VNO= 0V-55= +25°C0.10.0020.1
C, E, M
V+ = 3.6V, VCOM= 0V,
VNO= 3V5
ICOM(OFF)COM Off Leakage Current
(Notes 4, 5)= +25°C-0.10.0020.1
C, E, M
V+ = 3.6V, VCOM= 3V,
VNO= 0V-1010
RONCOM, NO On-ResistanceAnalog Signal RangeC, E, MVCOM, VNO
DIGITAL I/O
SWITCH DYNAMIC CHARACTERISTICS
POWER SUPPLY
ANALOG SWITCH
rially Controlled, Low-Voltage,-Channel SPST Switch_______________________________________________________________________________________Note 1:The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2:
ΔRON= RON(max)- RON(min). On-resistance match between channels and on-resistance flatness are guaranteed only with
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.
Note 3:
Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4:
Guaranteed by design.
Note 5:
Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6:
See Figure 6. Off isolation = 20log10VCOM/VNO, VCOM= output. NO = input to off switch.
Note 7:
Between any two switches. See Figure 3.
TIMING CHARACTERISTICS—Single +3V Supply (Figure 1)

(V+ = +3.0V to +3.6V, V- = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
SERIAL DIGITAL INTERFACE

RESETMinimum Pulse WidthtRW105nsTA= +25°C
Allowable Fall Time at DIN,
SCLK (Note 4)tSCF2μs20% of V+ to 70% of V+, = 10pFC, E, M
Fall Time of DOUT (Note 4)tDF300ns20% of V+ to 70% of V+, = 10pFC, E, M
Rise Time of DOUT (Note 4)tDR300ns20% of V+ to 70% of V+, = 10pFC, E, M
Allowable Rise Time at DIN,
SCLK (Note 4)tSCR2μs20% of V+ to 70% of V+, = 10pFC, E, M
DIN Data Valid after Falling SCLK
(Note 4)tDO400ns
Data Hold Time (Note 4)
Data Setup Time (Note 4)tDS20038ns
tDH0-38
15050% of SCLK to 10% of
DOUT, CL= 10pF
SCLK Low Time (Note 4)
tCL
C, E, M
190ns= +25°C
C, E, M
C, E, M
PARAMETERSYMBOLMINTYPMAX
(Note 2)UNITS

C, E, M
SCLK High Time (Note 4)Lag Time (Note 4)tCSH2240ns
tCH190Lead Time (Note 4)
Cycle Time (Note 4)
SCLK FrequencyfSCLK2.1MHz
tCH +tCL480
tCSS240ns
C, E, M
C, E, M
C, E, M
C, E, M
C, E, M
CONDITIONS
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