MAX321ESA+T ,Precision, Dual Supply, SPST, Analog CMOS SwitchesGeneral Description ________
MAX3220BCAP ,3V to 5.5V, up to 250kbps true RS-232 transceiver with 4microA autoshutdown plus and power-on reset. Reset threshold 2.85V.Applications ______________Ordering InformationPalmtop ComputersPART* TEMP. RANGE PIN-PACKAGEPortab ..
MAX3220BEAP ,3V to 5.5V, up to 250kbps true RS-232 transceiver with 4microA autoshutdown plus and power-on reset. Reset threshold 2.85V.ELECTRICAL CHARACTERISTICS(V = 3V to 5.5V, C1–C4 = 0.1µF (tested at 3.3V ±10%), C1 = 0.047µF, C2–C4 ..
MAX3221 ,1µA Supply Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown™FeaturesThe MAX3221/MAX3223/MAX3243 achieve 1µA supply • Integrated Charge Pump Circuitry Simplifie ..
MAX3221 ,1µA Supply Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown™ApplicationsMAX3223EAP -40°C to +85°C 20 SSOP• Battery-Powered EquipmentMAX3223EUP -40°C to +85°C 2 ..
MAX3221CAE ,1A Supply Current / True +3V to +5.5V RS 232 Transceiver with AutoShutdownMAX3221/MAX3223/MAX3243*19-0306; Rev 6; 3/991µA Supply-Current, True +3V to +5.5VRS-232 Transceiver ..
MAX6455UT16S+T ,µP Supervisors with Separate VCC Reset and Manual Reset OutputsApplicationsRESET 1 6 MR RESET 1 6 MR● Set-Top Boxes ● Consumer ElectronicsMAX6453 MAX6455● DVD Pla ..
MAX6456UT29S+T ,µP Supervisors with Separate VCC Reset and Manual Reset OutputsFeaturesThe MAX6453–MAX6456 are low-power, dual-voltage ● Precision Factory-Set Reset Thresholds Fr ..
MAX6457UKD0B+T ,High-Voltage, Low-Current Voltage Monitors in SOT Packagesapplications. Each device is available in a smallPin Configurations appear at end of data sheet.SOT ..
MAX6457UKD3B+T ,High-Voltage, Low-Current Voltage Monitors in SOT Packagesapplications or allows(50µs, 150ms)the device to operate in transparent mode. The MAX6458 Internal ..
MAX6457UKD3C-T ,150 ms, high-voltage, low-current voltage monitor in SOT packageApplications+21V (NOMINAL)BATTERY IN DC-DC OUTUndervoltage Monitoring/ShutdownCHARGER CONVERTERSHDN ..
MAX6458UKD0A-T ,50 ms, high-voltage, low-current voltage monitor in SOT packageapplications or allows(50µs, 150ms)the device to operate in transparent mode. The MAX6458 Internal ..
MAX320CSA+-MAX320CUA+-MAX320ESA+-MAX320EUA-MAX321CSA+-MAX321CUA+-MAX321ESA+T-MAX322CSA+-MAX322CUA+
Precision, Dual Supply, SPST, Analog CMOS Switches
_______________General DescriptionThe MAX320/MAX321/MAX322 are precision, dual,
SPST analog switches designed to operate from ±3V to
±8V dual supplies. The MAX320 has two normally open
(NO) switches and the MAX321 has two normally
closed (NC) switches. The MAX322 has one NO and
one NC switch. Low power consumption (1.25mW)
makes these parts ideal for battery-powered equip-
ment. They offer low leakage currents (100pA max) and
fast switching speeds (tON= 150ns max, tOFF= 100ns
max).
The MAX320 series, powered from ±5V supplies, offers
35Ωmax on-resistance (RON), 2Ωmax matching
between channels, and 4Ωmax RONflatness.
These switches also offer 5pC max charge injection
and a minimum of 2000V ESD protection per Method
For equivalent devices specified for single-supply oper-
ation, see the MAX323/MAX324/MAX325 data sheet.
For quad versions of these switches, see the
MAX391/MAX392/MAX393 data sheet.
________________________ApplicationsBattery-Operated SystemsSample-and-Hold Circuits
Heads-Up DisplaysGuidance and Control Systems
Audio and Video SwitchingMilitary Radios
Test EquipmentCommunications Systems
±5V DACs and ADCsPBX, PABX
____________________________FeaturesLow On-Resistance, 35Ωmax (16Ωtypical)RONMatching Between Channels <2ΩRONFlatness <4ΩGuaranteed Charge Injection <5pCBipolar Supply Operation (±3V to ±8V)Low Power Consumption, <1.25mWLow Leakage Current Over Temperature,
<2.5nA at +85°CFast Switching, tON<150ns, tOFF<100nsGuaranteed Break-Before-Make (MAX322 only)
______________Ordering Information
Precision, Dual-Supply, SPST
Analog Switches
________________________________________________________________Maxim Integrated Products1SWITCHES SHOWN FOR LOGIC "0" INPUT
MAX321
LOGICSWITCHOFF
TOP VIEW
DIP/SO/mMAX
MAX320
LOGICSWITCHOFF
MAX322
LOGICSWITCH 1OFF
SWITCH 2OFF
IN1
COM2
NO2V-
IN2
COM1
NO1
MAX320
DIP/SO/mMAXIN1
COM2
NC2V-
IN2
COM1
NC1
MAX321
DIP/SO/mMAXIN1
COM2
NC2V-
IN2
COM1
NO1
MAX322
_____________________Pin Configurations/Functional Diagrams/Truth Tables
Call toll free 1-800-998-8800 for free samples or literature.19-0350; Rev 0; 12/94
Ordering Information continued at end of data sheet.* Contact factory for dice specifications.
** Contact factory for availability.
8 CERDIP**-55°C to +125°CMAX320MJA
8 CERDIP**-40°C to +85°CMAX320EJA
8 SO-40°C to +85°CMAX320ESA
8 Plastic DIP-40°C to +85°CMAX320EPA
Dice*0°C to +70°CMAX320C/D
8 SO0°C to +70°CMAX320CSA
8 Plastic DIP0°C to +70°C
MAX320CPA
PIN-PACKAGETEMP. RANGEPART8 μMAX0°C to +70°CMAX320CUA
Voltage Referenced to V-................................................................(V- - 0.3V) to +17V
IN_, COM_, NC_, NO_ (Note 1).........(V- - 0.3V) to (V+ + 0.3V)
Continuous Current (any terminal)......................................30mA
Peak Current, COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle max)..............................100mA
ESD per Method 3015.7..................................................>2000V
Continuous Power Dissipation
Plastic DIP (derate 9.09mW/°C above +70°C).............727mW
Narrow SO (derate 5.88mW/°C above +70°C).............471mW
μMAX (derate 4.10mW/°C above +70°C).....................330mW
CERDIP (derate 8.00mW/°C above +70°C)..................640mW
Operating Temperature Ranges
MAX32_C_ _........................................................0°C to +70°C
MAX32_E_ _......................................................-40°C to +85°C
MAX32_MJA...................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
Precision, Dual-Supply, SPST
Analog Switches_______________________________________________________________________________________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.
ABSOLUTE MAXIMUM RATINGS
Note 1:Signals on NC_, NO_, COM_, or IN_ exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to
maximum current rating.
ELECTRICAL CHARACTERISTICS(V+ = +5V ±10%, V- = -5V ±10%, VINH= 3.5V, VINL= 2.5V, TA= TMINto TMAX, unless otherwise noted.)
COM On Leakage Current
(Note 6)nA
PARAMETERSYMBOLMINTYPMAX
(Note 2)UNITSOn-ResistanceRON35
0.32On-Resistance Match Between
Channels (Note 4)DRON
Analog Signal Range
VCOM,
VNO,
VNCV+V
On-Resistance Flatness
(Note 5)RFLAT(ON)4
-0.10.010.1NO or NC Off Leakage Current
(Note 6)
INO(OFF)
INC(OFF)-55
COM Off Leakage Current
(Note 6)-55nAICOM(OFF)
ICOM(ON)
CONDITIONSV+ = 5V, V- = -5V,
ICOM= 1.0mA,
VNOor VNC= ±3V
V+ = 4.5V,
V- = -4.5V,
ICOM= 1.0mA,
VNOor VNC= ±3.5V
V+ = 5V, V- = -5V,
ICOM= 1.0mA,
VNOor VNC= ±3V
V+ = 5.5V,
V- = -5.5V,
VCOM= ±4.5V,
VNOor VNC= 4.5V
(Note 3)
V+ = 5.5V,
V- = -5.5V,
VCOM= ±4.5V,
VNOor VNC= 4.5V
V+ = 5.5V,
V- = -5.5V,
VCOM= ±4.5V,
VNOor VNC= ±4.5V= +25°C= +25°C= +25°C= TMIN
to TMAX= +25°C= TMIN
to TMAX= +25°C= TMIN
to TMAX=
+25°C= TMINto TMAX
C, E
C, E
C, E= TMINto TMAX= TMINto TMAX
C, E1630
ANALOG SWITCHPrecision, Dual-Supply, SPST
Analog Switches
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS(V+ = +5V ±10%, V- = -5V ±10%, VINH= 3.5V, VINL= 2.5V, TA= TMINto TMAX, unless otherwise noted.)
PARAMETERSYMBOLMINTYPMAX
(Note 2)UNITSInput Current with Input
Voltage HighIINH-0.50.0050.5μA
CONDITIONSInput Current with Input
Voltage LowIINL-0.50.0050.5μA
Turn-On TimetON65150ns
Charge Injection
(Note 3)Q25pCCL= 1.0nF, VGEN= 0V,
RGEN= 0Ω, Figure 4= +25°C= TMINto TMAX175VCOM= ±3V, Figure 2= +25°C= TMINto TMAX150VCOM= ±3V, Figure 2Turn-Off TimetOFF35100ns
Power-Supply Range
MAX322 only, RL= 300Ω, CL= 35pF, Figure 3Break-Before-Make
Time Delay (Note 3)tD25ns= +25°C= +25°CRL= 50Ω, CL= 5pF,
f = 1MHz, Figure 5Off Isolation (Note 7)OIRR72dB= +25°CRL= 50Ω, CL= 5pF,
f = 1MHz, Figure 6Crosstalk (Note 8)85dB= +25°Cf = 1MHz, Figure 7NC or NO CapacitanceC(OFF)9pF= +25°Cf = 1MHz, Figure 7COM Off CapacitanceCCOM(OFF)9pF= +25°Cf = 1MHz, Figure 8COM On CapacitanceCCOM(ON)pF
±2.7±8V
Positive Supply Current
V+ = 5.5V, V- = -5.5V,
VIN= 0V or V+,
all channels on or offTA= TMINto TMAX-200200
Negative Supply
CurrentI-
V+ = 5.5V, V- = -5.5V,
VIN= 0V or V+,
all channels on or off= +25°C-12580125
Note 2:The algebraic convention where the most negative value is a minimum and the most positive value a maximum is used in
this data sheet.
Note 3:Guaranteed by design.
Note 4:ΔRON= ΔRONmax - ΔRONmin.
Note 5:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal range.
Note 6:Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25°C.
Note 7:Off Isolation = 20 log10[ VCOM⁄ (VNC or VNO)], VCOM= output, VNC or VNO= input to off switch.
Note 8:Between any two switches.= TMINto TMAX= +25°C
Input Voltage HighVINH3.5V3V < V+ < 8V, V- ≤0V
V+ = 5V ±10%, V- ≤0V
V+ - 1.5
Input Voltage LowVINL2.5V3V < V+ < 8V, V- ≤0V
V+ = 5V ±10%, V- ≤0V
V+ - 2.5
LOGIC INPUT
DYNAMIC
SUPPLY
Precision, Dual-Supply, SPST
Analog Switches_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics(V+ = +5V, V- = -5V, TA = +25°C, unless otherwise noted.)
OFF LEAKAGE CURRENT vs. TEMPERATURE
MAX320-05
TEMPERATURE (°C)
F L
(nA
V+ = +5.5V, V- = -5.5V
VCOM = ±4.5V
VNC or VNO = 4.5V-602
ON-RESISTANCE vs. VOLTAGE AT COM PINMAX320-01
VCOM (V)
(W-2468
V± = ±3V
V± = ±5V
V± = ±8V-3-4-234
ON-RESISTANCE vs. VOLTAGE AT COM PIN
(OVER TEMPERATURE)AX320-02
VCOM (V)
(W0125
A: TA = +125°C
B: TA = +85°C
C: TA = +25°C
D: TA = -55°C-1
ON-RESISTANCE MATCH vs. VOLTAGE
AT COM PIN (OVER TEMPERATURE)MAX320-03
VCOM (V)
(W3
A: TA = -55°C
B: TA = +25°C
C: TA = +85°C
D: TA = +125°CAD
ON LEAKAGE CURRENT vs. TEMPERATURE
AX320-04
TEMPERATURE (°C)
E C
(n
V+ = +5.5V, V- = -5.5V
VCOM = ±4.5V, VNC or VNO = ±4.5V
SUPPLY CURRENT vs. TEMPERATURE
AX320-07
TEMPERATURE (°C)
Y (m45-35-155105125
CHARGE INJECTION vs.
VOLTAGE AT COM PIN
MAX320-06
VCOM (V)
(p05
-10-3-21234
Precision, Dual-Supply, SPST
Analog Switches
_______________________________________________________________________________________5
__________Applications Information
Logic LevelsCalculate the logic thresholds typically as follows: VIH=
(V+ - 1.5V) and VIL= (V+ - 2.5V).
Power-supply consumption is minimized when IN1 and
IN2 are driven with logic-high levels equal to V+ and logic-
low levels well below the calculated VILof (V+ - 2.5V). IN1
and IN2 can be driven to V- without damage.
Analog Signal LevelsAnalog signals that range over the entire supply voltage
(V- to V+) can be switched, with very little change in on-
resistance over the entire voltage range (see Typical
Operating Characteristics). All switches are bidirec-
tional, so NO_, NC_, and COM_ pins can be used as
either inputs or outputs.
Power-Supply Sequencing
and Overvoltage ProtectionDo not exceed the absolute maximum ratings, because
stresses beyond the listed ratings may cause perma-
nent damage to the devices.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V+, followed by V-,
before applying analog signals or logic inputs, especial-
ly if the analog or logic signals are not current-limited. If
this sequencing is not possible, and if the analog or
logic inputs are not current-limited to <30mA, add two
small signal diodes (D1, D2) as shown in Figure 1.
Adding protection diodes reduces the analog signal
range to a diode drop (about 0.7V) below V+ for D1,
and a diode drop above V- for D2. Leakage is not
affected by adding the diodes. On-resistance increas-
es by a small amount at low supply voltages. Maximum
supply voltage (V- to V+) must not exceed 17V.
Adding protection diode D1 causes the logic thresh-
olds to be shifted relative to the positive power-supply
rail. This can be significant when low positive supply
voltages (+5V or less) are used. Driving IN1 and IN2 all
the way to the supply rails (i.e., to a diode drop higher
than the V+ pin or a diode drop lower than the V- pin) is
always acceptable.
The protection diodes D1 and D2 also protect against
some overvoltage situations. With the circuit of Figure 1,
if the supply voltage is below the absolute maximum
rating and if a fault voltage up to the absolute maximum
rating is applied to an analog signal pin, no damage
will result. For example, with ±5V supplies, analog sig-
nals up to ±8.5V will not damage the circuit of Figure 1.
If only a single fault signal is present, the fault voltage
can rise to +12V or to -12V without damage.
_____________________Pin DescriptionPOSITIVE SUPPLY
COM
NEGATIVE SUPPLY
MAX320
MAX321
MAX322
Figure 1. Overvoltage Protection Using Two External Blocking
DiodesNormally Closed Analog
Switch Terminal
NC2
(MAX321/MAX322)
Normally Open Analog
Switch Terminal
NO2
(MAX320)
Negative SupplyV-4
Logic InputsIN2, IN13, 7
PINAnalog Switch Common
TerminalsCOM1, COM22, 6
Normally Closed Analog
Switch Terminal
NC1
(MAX321)
Normally Open Analog
Switch Terminal
NO1
(MAX320/MAX322)1
FUNCTIONNAMEPositive SupplyV+8
Precision, Dual-Supply, SPST
Analog Switches_______________________________________________________________________________________VGEN
NC
or NO
VOUT
-5VVOUT
OFFONOFFVOUT
Q = (DVOUT)(CL)
COM
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
OFFON
OFFINVIN
+5V
RGEN
IN
MAX320
MAX321
MAX322
Figure 4. Charge Injection
tr < 20ns
tf < 20ns
50%
LOGIC
INPUT
-5V
RL
300W
NO
or NC
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
VOUT = VCOM ( RL )
RL + RON
SWITCH
INPUT
tOFF
COM
SWITCH
OUTPUT
0.9 x V0UT0.9 x VOUT
tON
VOUT
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
CL
35pF
+5V
VOUTVCOM
MAX320
MAX321
MAX322
50%
0.9 x V0UT1
LOGIC
INPUT
SWITCH
OUTPUT 2
(VOUT2)
0.9 x VOUT2tD
LOGIC
INPUTV-
-5V
RL2
300W
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
COM2
COM1
VOUT2
+5V
CL2
35pF
VCOM1 = +3V
RL1
300W
VOUT1
CL1
35pF
NO1
NC2SWITCH
OUTPUT 1
(VOUT1)
MAX322
VCOM2 = +3V
Figure 2. Switching Time
Figure 3. Break-Before-Make Interval (MAX322 only)
______________________________________________Test Circuits/Timing Diagrams
