MAX335CWG+-MAX335EUG-MAX335EUG+ Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX335CWG+-MAX335EUG-MAX335EUG+
Serial Controlled, 8-Channel SPST Switch
_______________General Description
The MAX335 analog switch with serial digital interface
offers eight separately controlled single-pole-single-
throw (SPST) switches. All switches conduct equally in
either direction, and on-resistance (100W) is constant
over the analog signal range.
These CMOS switches can operate continuously with
power supplies ranging from ±4.5V to ±20V and handle
rail-to-rail analog signals. Upon power-up, all switches are
off, and the internal serial and parallel shift registers are
reset to zero. The MAX335 is equivalent to two DG211
quad switches but controlled by a serial interface.
The interface is compatible with the Motorola SPI inter-
face standard. Functioning as a shift register, this serial
interface allows data (at DIN) to be locked in synchro-
nous with the rising edge of clock (SCLK). The shift reg-
ister's output (DOUT) enables several MAX335s to be
daisy chained.
________________________Applications
Serial Data Acquisition and Process Control
Avionics
Signal Routing
Networking
____________________________Features8 Separately Controlled SPST SwitchesSPI-Compatible Serial InterfaceAccepts ±15V Analog SwingsMultiple Devices Can Be Daisy Chained
______________Ordering Information
MAX335
Serial Controlled, 8-Channel SPST Switch
SCLK
DIN
GND
NO0
COM0
NO1
COM1
NO2
COM2
NO3
COM3
DIP/SO
TOP VIEW
MAX335
DOUT
NO7
COM7
NO6
COM6
NO5
COM5
NO4
COM4
__________________Pin Configuration
19-0220; Rev 3; 10/03
LATCH
NO0
COM0
8-BIT SHIFT REGISTER
CLOCK TRANSLATOR
CS TRANSLATOR
+5V TRANSLATOR
DIN
SCLK
NO7
COM7
PARALLEL REGISTER AND TRANSLATOR
DOUT
MAX335
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
PARTTEMP RANGEPIN-PACKAGE
MAX335CNG 0°C to +70°C24 Narrow Plastic DIP
MAX335CWG 0°C to +70°C24 Wide SO
MAX335C/D 0°C to +70°CDice*
MAX335ENG-40°C to +85°C24 Narrow Plastic DIP
MAX335EUG-40°C to +85°C24 TSSOP
MAX335EWG-40°C to +85°C24 Wide SO
MAX335MRG -55°C to +125°C24 Narrow CERDIP**
rial Controlled, 8-Channel SPST SwitchABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VL= +5V ±10%, V+ = 15V, V- = -15V, 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.
PARAMETERSYMBOLMINTYPMAXUNITS0.0021
On-ResistanceRON200Ω
NO Off-Leakage CurrentINO(OFF)
Analog Signal RangeVANALOG-1515V
COM Off-Leakage CurrentICOM(OFF)
-40400.012COM On-Leakage CurrentICOM(ON)
2.4DIN, SCLK,CSInput Logic
Threshold HighVIH11V
0.8DIN, SCLK, –CSInput Logic
Threshold LowVIL3V0.031DIN, SCLK, CSInput Current
Logic High-10.031μAIINH
CONDITIONS
VCOM= -14V,
VNO= +14V
VCOM= -14V,
VNO= +14V
VCOM= ±10V,NO= 1mA
VCOM= -14V,
VNO= +14V
VCOM= VNO= +14V
VCOM= -14V,
VNO= +14V
VCOM= VNO= -14V= TMINto TMAX
VDIN, VSCLK, VCS= 2.4V= +15V, VDIN, VSCLK, V–C—S–= 11V= +25°C= +25°C
DIN, SCLK, –CSInput Current
Logic LowIINLVDIN, VSCLK, VCS= 0.8V-10.031μA
DOUT Output Voltage
Logic HighVDOUTIDOUT= 0.8mA3.5VLV= +25°C= +25°C= +25°C= +25°C= +5V= +15V= +5V= +15V= +15V, VDIN, VSCLK, V–C—S–= 3V-10.031
SWITCH
DIGITAL I/O= +25°C
Note 1:All leads are soldered or welded to PC boards.
Voltages Referenced to V-
V+...........................................................................................44V
GND.......................................................................................25V
VL.....................................................(GND - 0.3V) to (V+ + 0.3V)
SCLK, CS, DIN, DOUT, NO_, COM_ ...............V- -2V to V+ +2V
or 30mA, whichever occurs first
Continuous Current (any terminal).......................................30mA
Peak Current, NO or COM
(pulsed at 1ms, 10% duty cycle MAX)...............................00mA
Continuous Power Dissipation (TA= +70°C) (Note 1)
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
TSSOP (derate 12.2mW/°C above +70°C)...........................30mA
Operating Temperature Ranges
MAX335C_ _ ............................................................0°C to +70°C
MAX335E_ _ .........................................................-40°C to +85°C
MAX335MRG.......................................................-55°C to +125°C
Storage Temperature Range..............................-65°C to +160°C
Lead Temperature (soldering, 10sec)...............................+300°C
rial Controlled, 8-Channel SPST SwitchELECTRICAL CHARACTERISTICS (continued)
(VL= +5V ±10%, V+ = 15V, V- = -15V, TA = TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 2:When VLfalls below this voltage, all switches are set off and the internal shift register is cleared (all zero).
Note 3:Guaranteed, not production tested.
PARAMETER
COM Off-Capacitance
SYMBOLMINTYPMAX
CCOM(OFF)2
UNITS
Channel On-CapacitanceCCOM(ON)8
SCLK Input HysteresisSCLKHYST100RESET VoltageVLL0.8V
Turn-On TimetON500ns400
Off Isolation
Turn-Off Time
OIRR
tOFF500
NO Off-Capacitance
CNO(OFF)2pF
Channel-to-Channel CrosstalkCCRR100dB
Break-Before-Make DelayTBBM2515
Clock Feedthrough at S, D
(Note 3)ESCLK100nV-sec
DOUT Output Voltage
Logic LowVDOUT0.4V
Power-Supply Voltage RangeV+/V-±4.5±20V4.5V+V
CONDITIONS= GND, f = 1MHz= VS= GND,
f = 1MHz
(Note 2)
From rising edge of
RL= 100Ω, CL= 15pF,
VS = 1VRMS, f = 100kHz
From rising edge of= GND, f = 1MHz
RL= 50Ω, CL= 15pF,
VS = 1VRMS, f = 100kHz
DLOAD= SLOAD=
75Ω, measured
at S and D
IDOUT= -1.6mA
150300V+ Supply CurrentI+DIN = CS= SCLK =
0V/5V500μA
0.0110V- Supply CurrentI-DIN = CS= SCLK =
0V/5V10μA100Power-Supply Voltage RangeSupply CurrentILDIN = CS= SCLK =
0V/5V200μA= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°CRESET VoltageVLH2.4V
DIGITAL I/O
SWITCH DYNAMIC CHARACTERISTICS
POWER SUPPLIES= +25°C
rial Controlled, 8-Channel SPST SwitchPARAMETER
DOUT Data-Hold Time After Rising
SCLK (Note 4)
SYMBOLMINTYPMAX
UNITS
Data-Setup TimetDS
Rise Time of DOUT (Note 3)
SCLK Low Time
tCL190ns
SCLK High TimetCH190Lag TimetCSH2240ns
Data-Hold TimetDH0ns
DOUT Data Valid After
Falling SCLKtDO
Fall Time of DOUT (Note 3)100ns
Cycle Time
SCLK Maximum Frequency
fSCLK2.1
MHz
tCH + tCL480nsLead TimetCSS240ns
CONDITIONS= 10pF
20% VLto 70% VL, CL= 10pF
20% VLto 70% VL, CL= 10pF
70% VLto 20% VL, CL= 10pF
70% VLto 20% VL, CL= 10pF
Note 4:This specification guarantees that data at DOUTnever appears before SCLK's falling edge.
TIMING CHARACTERISTICS OF SERIAL DIGITAL INTERFACE (Figure 1)
(VL= +5V ±10%, V+ = +15V, V- = -15V, TA = TMINto TMAX, unless otherwise noted.)
400= +25°C
Allowable Fall Time at DIN,
SCLK, CS(Note 3)
Allowable Rise Time at DIN,
SCLK, CS(Note 3)
50% of SCLK to 10% of
DOUT CL = 10pF
rial Controlled, 8-Channel SPST SwitcRON vs. VCOM AND
POWER-SUPPLY VOLTAGE
AX335-01
VCOM (V)
A: ±5V
B: ±10V
C: ±15V
D: ±20V
RON vs. VCOM AND
TEMPERATURE
MAX335-02
VCOM (V)
(W
A: TA = +25°C
B: TA = +85°C
C: TA = +125°CA
tON, tOFF vs. VCOM
MAX335-03
VCOM (V)
, tO
F (n
tON
tOFF
±20
DATA-HOLD TIME vs.
POWER-SUPPLY VOLTAGE
MAX335-04
SUPPLY VOLTAGE (V)
±15
-20±10
CHARGE INJECTION vs. VCOM
AX335-07
VCOM (V)
(p
A: ±5V
B: ±15V
A
B
±20
DATA-SETUP TIME vs.
POWER SUPPLY
AX335-05
SUPPLY VOLTAGE (V)
(n
±15±10
LEAKAGE CURRENT vs.
TEMPERATURE
AX335-06
TEMPERATURE (°C)
+125
-55+25
OFF
SUPPLY vs. TEMPERATURE
AX335-08
TEMPERATURE (°C)
, I-
, IL
+125
-55+25
MINIMUM SCLK PULSE WIDTH
vs. POWER SUPPLY
AX335-09
SUPPLY VOLTAGE (V)
(n
±20±10
±15
__________________________________________Typical Operating Characteristics
(V+ = +15V, V- = -15V, VL= 5V, TA = +25°C, unless otherwise noted.)
______________Detailed Description
Serial Digital Interface
Basic Operation
Refer to Figure 2. The MAX335 interface can be
thought of as an 8-bit shift register controlled by CS.
While CSis low, input data appearing at DIN is clocked
into the shift register synchronous with SCLK’s rising
edge. The data is an 8-bit word, each bit controlling
one of eight switches in the MAX335 (Table 1). DOUT is
the output of the shift register, with data appearing syn-
chronous with SCLK’s falling edge. Data at DOUT is
simply the input data delayed by eight clock cycles.
When shifting the input data, D7 is the first bit in and
out of the shift register. While shifting data, the switches
remain in their original configuration. When the 8 bits of
data have been shifted in, CSis brought high. This
updates the new switch configuration and inhibits fur-
ther data from entering the shift register. Transitions at
DIN and SCLK have no effect when CSis high, and
DOUT holds the last bit in the shift register.
The MAX335 three-wire serial interface is compatible
with the SPI™ and Microwire™ standards. If interfacing
with a Motorola processor serial interface, set CPOL = 0.
The MAX335 is considered a slave device (Figures 2
and 3). Upon power-up, the shift register contains all
zeros, and all switches are off.
The latch that drives the analog switch is only
updated on the rising edge of CSwhen SCLK is low.
If SCLK is high when CSrises, the latch will not be
updated until SCLK goes low. The CPOL = 1, CPHA = 1
SPI configuration does not update the latch correctly.
Daisy Chaining
For a simple interface using several MAX335s, “daisy
chain” the shift registers as shown in Figure 5. The CS
pins of all devices are connected together, and a
stream of data is shifted through the MAX335s in
series. When CSis brought high, all switches are
updated simultaneously. Additional shift registers may
be included anywhere in series with the MAX335 data
chain.
Addressable Serial Interface
When several serial devices are configured as slaves,
addressable by the processor, DIN pins of each
MAX335 are connected together (Figure 6). Address
decode logic individually controls CSof each slave
device. When a slave is selected, its CSis brought low,
data is shifted in, and CSis brought high to latch the
data. Typically, only one slave is addressed at a time.
DOUT is not used.
Digital Feedthrough
Digital feedthrough energy measures 100nV-sec, which
means that with no filtering at the signal channel,
feedthrough from a sharply rising clock edge into an
unfiltered switch channel can be measured at 1Vp-p for
100ns. However, even 100pF capacitance in the switch
channel, when combined with the switch resistance,
yields a filter that reduces this transient to 10mVp-p
typical. To reduce digital feedthrough, hysteresis
(150mV typ)was added to the SCLK input so triangle
or sine waves may be used.rial Controlled, 8-Channel SPST Switch
NAMEFUNCTIONSCLKSerial Clock InputV+Positive Supply Voltage
PIN
_____________________Pin DescriptionDINSerial Data InputGNDGroundCOM1Switch 1NO1Switch 1COMØSwitch 0 NOØSwitch 0 COM4Switch 4COM3Switch 3NO3Switch 3COM2Switch 2NO2Switch 2NO4Switch 4COM5Switch 5NO5Switch 5COM6Switch 6NO6Switch 6COM7Switch 7NO7Switch 7V-Negative Supply VoltageDOUTSerial Data OutputVLLogic Supply/ResetC—S–Chip Select
rial Controlled, 8-Channel SPST Switch• • •
• • •
• • •
• • •
• • •
SCLK
DIN
DOUT
tDO
tDH
tDS
tCSH0
tCSStCH
tCLtCSH1
tCSH2
tCLL
tOFF
Figure 1. Timing DiagramD6D5D4
MSBLSBD2D1D0
DATA BITS FROM PREVIOUS DATA INPUT
DOUT POWER-UP DEFAULT: D7–D0 = 0D5D4D3D2D1D0D7
DOUT
DIN
SCLK
SWITCHES UPDATED
DATA CLOCKED IN
DATA CLOCKED OUT
INPUT DATA BITS
Figure 2. Three-Wire Interface Timing

Partno	Mfg	Dc	Qty	Available	Descript
MAX335EUG+ \|MAX335EUG	MAX	N/a	30	avai	Serial Controlled, 8-Channel SPST Switch
MAX335CWG+ \|MAX335CWG	MAXIM	N/a	14	avai	Serial Controlled, 8-Channel SPST Switch
MAX335EUG	MAXIM	N/a	6	avai	Serial Controlled, 8-Channel SPST Switch