Maxim MAX349EPN Serially controlled, low-voltage, 8-channel/dual 4-channel multiplexer Datasheet

19-0451; Rev 1; 10/98
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
The MAX349/MAX350 are 8-channel and dual 4-channel
serially controlled multiplexers (muxes). These muxes
conduct equally well in either direction. On-resistance
(100Ω max) is matched between switches to 16Ω max
and is flat (10Ω max) 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 mux 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 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 MAX349s or MAX350s
to be daisy chained.
All digital inputs have 0.8V or 2.4V logic thresholds,
ensuring both TTL and CMOS-logic compatibility when
using ±5V supplies or a single +5V supply.
________________________Applications
Serial Data-Acquisition
Systems
Avionics
Audio Signal Routing
Industrial and ProcessControl Systems
ATE Equipment
Networking
____________________________Features
♦ SPI/QSPI, MICROWIRE-Compatible Serial
Interface
♦ 8 Separately Controlled SPST Switches
♦ Single 8-to-1 Mux (MAX349)
Dual 4-to-1 Mux (MAX350)
♦ 100Ω Signal Paths with ±5V Supplies
♦ Rail-to-Rail® Signal Handling
♦ Asynchronous RESET Input
♦ ±2.7V to ±8V Dual Supplies
+2.7V to +16V Single Supply
♦ >2kV ESD Protection per Method 3015.7
♦ TTL/CMOS-Compatible Inputs (with +5V or ±5V
Supplies)
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX349CPN
0°C to +70°C
18 Plastic DIP
MAX349CWN
MAX349CAP
MAX349C/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
18 Wide SO
20 SSOP
Dice*
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Pin Configurations/Functional Diagrams
TOP VIEW
SCLK 1
MAX349
V+ 2
DIN 3
18 CS
17 RESET
LOGIC
16 DOUT
SCLK 1
MAX350
V+ 2
DIN 3
18 CS
17 RESET
LOGIC
16 DOUT
GND 4
15 V-
COM 5
14 N.C.
COMA 5
14 COMB
NO0 6
13 NO7
NO0A 6
13 NO0B
NO1 7
12 NO6
NO1A 7
12 NO1B
NO2 8
11 NO5
NO2A 8
11 NO2B
NO3 9
10 NO4
NO3A 9
10 NO3B
N.C. = NOT INTERNALLY
CONNECTED
DIP/SO
GND 4
15 V-
DIP/SO
Pin Configurations continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX349/MAX350
General Description
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
ABSOLUTE MAXIMUM RATINGS
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)
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ..889mW
18-Pin SO (derate 9.52mW/°C above +70°C)...............762mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW
Operating Temperature Ranges
MAX349C_ _, MAX350C_ _ .................................0°C to +70°C
MAX349E_ _, MAX350E_ _ ...............................-40°C to +85°C
MAX349M_ _, MAX350M_ _ ...........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°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.
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
MIN
CONDITIONS
TYP
(Note 1)
MAX
V+
V
60
100
Ω
UNITS
ANALOG SWITCH
Analog Signal Range
COM-NO On-Resistance
COM-NO On-Resistance Match
Between Channels (Note 2)
COM-NO On-Resistance
Flatness (Note 2)
VCOM, VNO
C, E, M
RON
TA = +25°C
C, E, M
125
∆RON
V+ = 5V, V- = -5V,
VCOM = ±3V, INO = 1mA
TA = +25°C
16
C, E, M
20
V+ = 5V, V- = -5V, INO = 1mA,
VCOM = -3V, 0V, 3V
TA = +25°C
10
C, E, M
15
RFLAT(ON)
V+ = 5.5V, V- = -5.5V,
VCOM = -4.5V, VNO = 4.5V
NO Off-Leakage Current
(Note 3)
INO(OFF)
V+ = 5.5V, V- = -5.5V,
VCOM = 4.5V, VNO = -4.5V
V+ = 5.5V,
V- = -5.5V,
VCOM =
±4.5V,
VNO = ±4.5V
COM Off-Leakage Current
(Note 3)
MAX349
MAX350
ICOM(OFF)
V+ = 5.5V,
V- = -5.5V,
VCOM =
-4.5V,
VNO = 4.5V
2
V-
V+ = 5V, V- = -5V,
VCOM = ±3V, INO = 1mA
MAX349
MAX350
TA = +25°C
C, E
-0.1
M
-10
TA = +25°C
-0.1
C, E
-10
TA = +25°C
-0.1
C, E
-10
M
-100
TA = +25°C
-0.1
-50
TA = +25°C
-0.2
C, E
-10
M
-100
TA = +25°C
-0.2
0.1
10
0.002
0.1
nA
5
10
0.002
0.1
10
100
0.002
-5
M
Ω
5
-5
M
C, E
0.002
-5
Ω
0.1
5
50
0.002
0.2
10
100
0.002
0.2
C, E
-5
5
M
-50
50
_______________________________________________________________________________________
nA
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
COM On-Leakage Current
(Note 3)
SYMBOL
ICOM(ON)
MIN
CONDITIONS
V+ = 5.5V,
V- = -5.5V,
VCOM = VNO =
±4.5V
MAX349
MAX350
TA = +25°C
C, E
M
TA = +25°C
C, E
M
-0.2
-10
-100
-0.2
-5
-50
TYP
(Note 1)
0.001
0.02
MAX
0.2
10
100
0.2
5
50
UNITS
nA
DIGITAL I/O
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
VIH
C, E, M
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
VIL
C, E, M
DIN, SCLK, CS, RESET Input
Current Logic High or Low
IIH, IIL
VDIN, VSCLK,
V CS = 0.8V or 2.4V
DOUT Output Voltage Logic High
VDOUT
DOUT Output Voltage Logic Low
VDOUT
SCLK Input Hysteresis
SCLKHYST
SWITCH DYNAMIC CHARACTERISTICS
IDOUT = 0.8mA
IDOUT = -1.6mA
Turn-On Time
tON
From rising edge of CS
Turn-Off Time
tOFF
From rising edge of CS
Break-Before-Make Delay
Charge Injection (Note 4)
NO Off-Capacitance
COM Off-Capacitance
tBBM
VCTE
From rising edge of CS
CL = 1nF, VNO = 0V, RS = 0Ω
VNO = GND, f = 1MHz
VCOM = GND, f = 1MHz
VCOM = VNO = GND,
f = 1MHz
RL = 50Ω, CL = 15pF,
VNO = 1VRMS, f = 100kHz
RL = 50Ω, CL = 15pF,
VNO = 1VRMS, f = 100kHz
CNO(OFF)
CCOM(OFF)
Switch On-Capacitance
C(ON)
Off-Isolation
VISO
Channel-to-Channel Crosstalk
VCT
POWER SUPPLY
Power-Supply Range
V+, V-
V+ Supply Current
I+
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
V- Supply Current
I-
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
2.4
C, E, M
-1
C, E, M
C, E, M
C, E, M
2.8
0
TA = +25°C
C, E, M
TA = +25°C
C, E, M
TA = +25°C
TA = +25°C
TA = +25°C
TA = +25°C
V
0.03
0.8
V
1
µA
V+
0.4
V
V
mV
100
200
90
5
40
1
2
2
275
400
150
300
10
ns
ns
ns
pC
pF
pF
TA = +25°C
8
pF
TA = +25°C
> 90
dB
TA = +25°C
< -90
dB
C, E, M
TA = +25°C
C, E, M
TA = +25°C
C, E, M
±3
7
-1
-2
0.1
±8
20
30
1
2
V
µA
µA
_______________________________________________________________________________________
3
MAX349/MAX350
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
TIMING CHARACTERISTICS—Dual Supplies (Figure 1)
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SERIAL DIGITAL INTERFACE
SCLK Frequency
Cycle Time
SYMBOL
MIN
CONDITIONS
TYP
MAX
(Note 1)
fSCLK
tCH + tCL
C, E, M
C, E, M
0
480
CS Lead Time
tCSS
C, E, M
240
ns
CS Lag Time
SCLK High Time
SCLK Low Time
Minimum Data Setup Time
Data Hold Time
tCSH2
C, E, M
240
ns
C, E, M
C, E, M
C, E, M
C, E, M
TA = +25°C
190
190
ns
ns
ns
ns
tCH
tCL
tDS
tDH
DIN Data Valid after Falling SCLK
(Note 4)
tDO
50% of SCLK to 10% of DOUT,
CL = 10pF
Rise Time of DOUT (Note 4)
tDR
Allowable Rise Time at DIN, SCLK
(Note 4)
0
2.1
UNITS
17
-17
85
100
MHz
ns
ns
C, E, M
400
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
100
ns
tSCR
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
2
µs
Fall Time of DOUT (Note 4)
tDF
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
100
ns
Allowable Fall Time at DIN, SCLK
(Note 4)
tSCF
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
2
µs
RESET Minimum Pulse Width
tRW
TA = +25°C
70
ns
Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆RON = 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 = 20log10 VCOM/VNO, VCOM = output. NO = input to off switch.
Note 7: Between any two switches. See Figure 3.
4
_______________________________________________________________________________________
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
(V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
MIN
CONDITIONS
TYP
(Note 1)
MAX
V+
V
125
175
Ω
UNITS
ANALOG SWITCH
Analog Signal Range
COM-NO On-Resistance
VCOM, VNO
RON
C, E, M
V+ = 5V, VCOM = 3.5V,
INO = 1mA
V+ = 5.5V, VCOM = 4.5V,
VNO = 0V
NO Off-Leakage Current
(Notes 4, 5)
INO(OFF)
V+ = 5.5V, VCOM = 0V,
VNO = 4.5V
MAX349
V+ = 5.5V,
VCOM = 4.5V,
VNO = 0V
MAX350
COM Off-Leakage Current
(Notes 4, 5)
ICOM(OFF)
MAX349
V+ = 5.5V,
VCOM = 0V,
VNO = 4.5V
MAX350
MAX349
COM On-Leakage Current
(Notes 4, 5)
ICOM(ON)
V+ = 5.5V,
VCOM = VNO =
±4.5V
MAX350
V-
TA = +25°C
C, E, M
TA = +25°C
C, E
225
-0.1
0.002
-5
M
-10
TA = +25°C
-0.1
0.1
5
10
0.002
0.1
C, E
-5
5
M
-10
10
TA = +25°C
-0.1
0.002
0.1
C, E
-10
10
M
-100
100
TA = +25°C
-0.1
0.002
0.1
C, E
-5
5
M
-50
50
TA = +25°C
-0.2
0.002
0.2
C, E
-10
10
M
-100
100
TA = +25°C
-0.2
0.002
-5
5
M
-50
50
TA = +25°C
-0.2
C, E
-10
10
M
-100
100
TA = +25°C
-0.2
0.02
nA
0.2
C, E
0.01
nA
0.2
0.2
C, E
-5
5
M
-50
50
2.4
nA
DIGITAL I/O
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
VIH
C, E, M
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
VIL
C, E, M
DIN, SCLK, CS, RESET Input
Current Logic High or Low
IIH, IIL
VDIN, VSCLK,
V CS = 0.8V or 2.4V
C, E, M
-1
DOUT Output Voltage Logic High
VDOUT
IDOUT = 0.8mA
C, E, M
DOUT Output Voltage Logic Low
VDOUT
IDOUT = -1.6mA
C, E, M
SCLK Input Hysteresis
SCLKHYST
C, E, M
V
0.8
V
1
µA
2.8
V+
V
0
0.4
V
0.03
100
mV
POWER SUPPLY
V+ Supply Current
I+
DIN = CS = SCLK = 0V or V+, TA = +25°C
RESET = 0V or V+
C, E, M
7
20
30
µA
_______________________________________________________________________________________
5
MAX349/MAX350
ELECTRICAL CHARACTERISTICS—Single +5V Supply
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
MIN
TYP
(Note 1)
MAX
TA = +25°C
C, E, M
TA = +25°C
C, E, M
TA = +25°C
TA = +25°C
160
400
500
200
300
TA = +25°C
> 90
dB
TA = +25°C
< -90
dB
CONDITIONS
UNITS
SWITCH DYNAMIC CHARACTERISTICS
Turn-On Time
tON
From rising edge of CS
Turn-Off Time
tOFF
From rising edge of CS
Break-Before-Make Delay
Charge Injection (Note 4)
tBBM
VCTE
Off-Isolation (Note 6)
VISO
Channel-to-Channel Crosstalk
(Note 7)
VCT
From rising edge of CS
CL = 1nF, VNO = 0V, RS = 0Ω
RL = 50Ω, CL = 15pF,
VNO = 1VRMS, f = 100kHz
RL = 50Ω, CL = 15pF,
VNO = 1VRMS, f = 100kHz
6
60
15
1
_______________________________________________________________________________________
10
ns
ns
ns
pC
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
(V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SERIAL DIGITAL INTERFACE
SCLK Frequency
SYMBOL
MIN
CONDITIONS
TYP
(Note 1)
MAX
fSCLK
C, E, M
0
tCH + tCL
C, E, M
480
ns
CS Lead Time (Note 4)
tCSS
C, E, M
240
ns
CS Lag Time (Note 4)
tCSH2
C, E, M
240
ns
SCLK High Time (Note 4)
SCLK Low Time (Note 4)
tCH
tCL
C, E, M
C, E, M
190
190
ns
ns
Minimum Data Setup Time
(Note 4)
tDS
C, E, M
17
Data Hold Time (Note 4)
tDH
DIN Data Valid after Falling SCLK
(Note 4)
tDO
50% of SCLK to 10% of
DOUT, CL = 10pF
C, E, M
TA = +25°C
C, E, M
-17
85
Rise Time of DOUT (Note 4)
tDR
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
100
ns
Allowable Rise Time at DIN,
SCLK (Note 4)
tSCR
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
2
µs
Fall Time of DOUT (Note 4)
tDF
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
100
ns
Allowable Fall Time at DIN,
SCLK (Note 4)
tSCF
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
2
µs
RESET Minimum Pulse Width
tRW
Cycle Time (Note 4)
TA = +25°C
2.1
UNITS
100
ns
ns
400
70
MHz
ns
ns
Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆RON = 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 = 20log10 VCOM/VNO, VCOM = output. NO = input to off switch.
Note 7: Between any two switches. See Figure 3.
_______________________________________________________________________________________
7
MAX349/MAX350
TIMING CHARACTERISTICS—Single +5V Supply (Figure 1)
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +3.0V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
MIN
CONDITIONS
TYP
(Note 1)
MAX
UNITS
ANALOG SWITCH
Analog Signal Range
COM-NO On-Resistance
VCOM, VNO
RON
C, E, M
V+ = 3.0V, VCOM = 1.5V,
INO = 1mA
MAX349
V+ = 3.6V,
VCOM = 3V,
VNO = 0V
MAX350
COM Off-Leakage Current
(Notes 4, 5)
ICOM(OFF)
MAX349
V+ = 3.6V,
VCOM = 0V,
VNO = 3V
MAX350
MAX349
COM On-Leakage Current
(Notes 4, 5)
ICOM(ON)
V+ = 3.6V,
VCOM = VNO = 3V
MAX350
V-
TA = +25°C
270
C, E, M
V+
V
500
Ω
600
TA = +25°C
-0.1
C, E
-10
0.002
10
M
-100
100
TA = +25°C
-0.1
0.002
0.1
0.1
C, E
-5
5
M
-50
50
TA = +25°C
-0.2
0.002
0.2
C, E
-10
10
M
-100
100
TA = +25°C
-0.2
0.002
0.2
C, E
-5
5
M
-50
50
TA = +25°C
-0.2
C, E
-10
M
-100
TA = +25°C
-0.2
0.01
nA
0.2
10
100
0.02
0.2
C, E
-5
5
M
-50
50
2.4
nA
DIGITAL I/O
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
VIH
C, E
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
VIL
C, E
DIN, SCLK, CS, RESET Input
Current Logic High or Low
IIH, IIL
VDIN, VSCLK,
V CS = 0.8V or 2.4V
C, E
-1
DOUT Output Voltage Logic High
VDOUT
IDOUT = 0.1mA
C, E, M
DOUT Output Voltage Logic Low
VDOUT
IDOUT = -1.6mA
C, E, M
SCLK Input Hysteresis
SCLKHYST
C, E, M
V
0.8
V
1
µA
2.8
V+
V
0
0.4
0.03
100
V
mV
POWER SUPPLY
V+ Supply Current
8
I+
DIN = CS = SCLK = 0V or V+, TA = +25°C
RESET = 0V or 5V
C, E, M
6
_______________________________________________________________________________________
20
30
V
µA
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +3.0V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
MIN
CONDITIONS
TYP
(Note 1)
MAX
275
600
700
300
400
UNITS
SWITCH DYNAMIC CHARACTERISTICS
Turn-On Time (Note 4)
tON
From rising edge of CS
Turn-Off Time (Note 4)
tOFF
From rising edge of CS
Break-Before-Make Delay (Note 4)
Charge Injection (Note 4)
tBBM
VCTE
Off-Isolation (Note 6)
VISO
Channel-to-Channel Crosstalk
(Note 7)
VCT
From rising edge of CS
CL = 1nF, VNO = 0V, RS = 0Ω
RL = 50Ω, CL = 15pF,
VNO = 1VRMS, f = 100kHz
RL = 50Ω, CL = 15pF,
VNO = 1VRMS, f = 100kHz
TA = +25°C
C, E, M
TA = +25°C
C, E, M
TA = +25°C
TA = +25°C
120
5
15
1
10
ns
ns
ns
pC
TA = +25°C
> 90
dB
TA = +25°C
< –90
dB
_______________________________________________________________________________________
9
MAX349/MAX350
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
TIMING CHARACTERISTICS—Single +3V Supply (Figure 1)
(V+ = +3.0V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SERIAL DIGITAL INTERFACE
SCLK Frequency
Cycle Time (Note 4)
SYMBOL
MIN
CONDITIONS
fSCLK
C, E, M
0
TYP
(Note 1)
MAX
2.1
UNITS
MHz
tCH + tCL
C, E, M
480
ns
CS Lead Time (Note 4)
tCSS
C, E, M
240
ns
CS Lag Time (Note 4)
tCSH2
C, E, M
240
ns
SCLK High Time (Note 4)
SCLK Low Time (Note 4)
tCH
tCL
C, E, M
C, E, M
190
190
ns
ns
Minimum Data Setup Time
(Note 4)
tDS
C, E, M
38
Data Hold Time (Note 4)
tDH
C, E, M
TA = +25°C
C, E, M
-38
150
120
ns
ns
DIN Data Valid after Falling SCLK
(Note 4)
tDO
50% of SCLK to 10% of
DOUT, CL = 10pF
Rise Time of DOUT (Note 4)
tDR
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
100
ns
Allowable Rise Time at DIN,
SCLK (Note 4)
tSCR
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
2
µs
Fall Time of DOUT (Note 4)
tDF
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
100
ns
Allowable Fall Time at DIN, SCLK
(Note 4)
tSCF
20% of V+ to 70% of V+,
CL = 10pF
C, E, M
2
µs
RESET Minimum Pulse Width
(Note 4)
tRW
TA = +25°C
400
105
ns
ns
Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆RON = 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 = 20log10 VCOM/VNO, VCOM = output. NO = input to off switch.
Note 7: Between any two switches. See Figure 3.
10
______________________________________________________________________________________
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
(DUAL SUPPLIES)
100
60
V± = ±5V
40
90
300
80
TA = +125°C
250
70
TA = +85°C
60
TA = +25°C
-3 -2
-1
1
0
2
3
4
TA = -55°C
-5 -4
-3 -2
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
(SINGLE SUPPLY)
-1
120
TA = +25°C
80
4
0
5
TA = -55°C
10
0
25
50
75
TEMPERATURE (°C)
100
125
250
MAX349/350-TOC7
A: V+ = 5V, V- = -5V
B: V+ = 5V, V- = 0V
3
A: V+ = 5V, V- = 5V
B: V+ = 5V, V- = 0V
200
tON, tOFF (ns)
VCTE (pC)
A
0
-1
B
150
100
-2
B = tON
A = tON
B = tOFF
A = tOFF
50
-3
-25
0
25
50
75
TEMPERATURE (°C)
DATA HOLD TIME vs.
POWER-SUPPLY VOLTAGE
2
1
-50
TURN-ON/TURN-OFF TIMES vs. VCOM
5
4
10
0.1
-25
VCOM (V)
CHARGE INJECTION vs. VCOM
125
100
1
-50
5
100
1,000
1
4
12
V± = ±5.5V
50
40
30
DATA HOLD TIME (ns)
3
2
10
10,000
MAX349/350-TOC8
1
8
ON-LEAKAGE vs.
TEMPERATURE
0.1
0
6
OFF-LEAKAGE vs.
TEMPERATURE
60
40
4
2
VCOM (V)
100
TA = +85°C
100
3
ON-LEAKAGE (pA)
RON (Ω)
140
2
MAX349/350-TOC5
TA = +125°C
1
V± = ±5.5V
OFF-LEAKAGE (pA)
160
0
VCOM (V)
1,000
MAX349/350-TOC4
V+ = 5V
V- = 0V
V+ = 12V
0
VCOM (V)
180
V+ = 9V
50
30
5
V+ = 5V
MAX349/350-TOC9
-5 -4
V+ = 3V
100
40
0
200
150
50
20
V- = 0V
MAX349/350-TOC6
80
RON (Ω)
RON (Ω)
V± = ±3V
V+ = 2.5V
350
RON (Ω)
V± = ±2.5V
V± = ±5.5V
100
400
MAX349/350-TOC2
120
110
MAX349/350-TOC1
140
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
MAX349/350-TOC3
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
20
10
0
-10
-20
-30
-4
-40
-5
0
-5 -4
-3 -2
-1
0
1
VCOM (V)
2
3
4
5
-50
-5 -4
-3 -2
-1
0
1
VCOM (V)
2
3
4
5
0
2
4
6
8
SUPPLY VOLTAGE (V)
______________________________________________________________________________________
11
MAX349/MAX350
__________________________________________Typical Operating Characteristics
(V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.)
POWER-SUPPLY CURRENT
vs. TEMPERATURE
90
80
V± = ±5.5V
10
35
MAX349/350-TOC11
100
MAX349/350-TOC10
100
MINIMUM SCLK PULSE WIDTH vs.
POSITIVE SUPPLY VOLTAGE
I+
MAX349/350-TOC12
DATA SETUP TIME vs.
POSITIVE SUPPLY VOLTAGE
30
70
50
1
40
SCLK (ns)
60
I+, I-, (µA)
DATA SETUP TIME (ns)
0.1
25
20
30
I-
0.01
20
15
10
0
0.001
4
2
6
10
-50
8
-25
SUPPLY VOLTAGE (V)
0
25
50
75
125
100
OFF ISOLATION
-40
V± = ±5V
600Ω IN AND OUT
10
1
0.1
-100
-120
100k
1M
10M
FREQUENCY (Hz)
12
-20
-80
-80
-100
10k
0
-60
-60
100
TDH (%)
ISOLATION OF
A BARE SOCKET
20
PHASE (DEGREES)
TOC13
MAX349/350
V± = ±5V
50W IN AND OUT
PHASE
-40
6
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
INSERTION LOSS
-20
4
2
SUPPLY VOLTAGE (V)
FREQUENCY RESPONSE
0
0
TEMPERATURE (°C)
MAX349/350-TOC14
0
LOSS (dB)
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
100M
1G
0.01
10
100
1k
10k
FREQUENCY (Hz)
______________________________________________________________________________________
8
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
PIN
MAX349
DIP/SO
SSOP
1
1
2
2
3
3
MAX350
DIP/SO
SSOP
1
1
2
2
3
3
NAME
FUNCTION
SCLK
V+
DIN
Serial Clock Digital Input
Positive Analog Supply Voltage Input
Serial Data Digital Input
Ground. Connect to digital ground. (Analog signals have
no ground reference; they are limited to V+ and V-.)
Common Analog Switch (mux output)
Normally Open Analog Switch Inputs 0–7
Common Analog Switch “A” (mux output)
Normally Open Analog Switch “A” Inputs 0–3
Normally Open Analog Switch “B” Inputs 0–3
Common Analog Switch “B” (mux output)
No Connect, not internally connected.
4
4
4
4
GND
5
6–13
—
—
—
—
14
5
6–9, 11–14
—
—
—
—
10, 15, 16
—
—
5
6–9
10–13
14
—
—
—
5
6–9
11–14
15
10, 16
COM
NO0–NO7
COMA
NO0A–NO3A
NO3B–NO0B
COMB
N.C.
15
17
15
17
V-
16
18
16
18
DOUT
Serial Data Digital Output. Output high is V+.
17
19
17
19
RESET
RESET Input. Connect to logic high (or V+) for normal operation.
Drive low to set all switches off and set internal shift registers to 0.
18
20
18
20
CS
Negative Analog Supply Voltage Input. Connect to GND
for single-supply operation.
Chip-Select Digital Input (Figure 1)
Note: NO and COM pins are identical and interchangeable. Either may be considered as an input or an output; signals pass equally
well in either direction.
CS
•••
tCSS
tCH
tCSH2
tON,
tOFF
SCLK
•••
tCL
tDS
tDH
DIN
•••
tDO
DOUT
•••
•••
COM-OUT
•••
Figure 1. Timing Diagram
______________________________________________________________________________________
13
MAX349/MAX350
Pin Description
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
Detailed Description
Basic Operation
The MAX349/MAX350 are 8-channel and dual 4-channel, serially controlled multiplexers (muxes). These
muxes are unusual in that any, all, or none of the input
channels can be directed to the output. All switches
are bidirectional, so inputs and outputs are interchangeable. When multiple inputs are connected to an
output, they are also connected to one another, separated from each other only by the on-resistance of two
switches. Both parts require eight bits of serial data to
set all eight switches.
Serial Digital Interface
The MAX349/MAX350 interface can be thought of as an
8-bit shift register controlled by CS (Figure 2). While CS
is low, input data appearing at DIN is clocked into the
shift register synchronously with SCLK’s rising edge.
The input is an 8-bit word, each bit controlling one of
the eight switches (Tables 1 and 2). DOUT is the output
of the shift register, with data appearing synchronously
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 previous configuration. When the eight
bits of data have been shifted in, CS is driven high.
This updates the new switch configuration and inhibits
further data from entering the shift register. Transitions
at DIN and SCLK have no effect when CS is high, and
DOUT holds the first input bit (D7) at its output.
More or fewer than eight clock cycles can be entered
during the CS low period. When this happens, the shift
register contains only the last eight serial data bits,
regardless of when they were entered. On the rising
edge of CS, all switches are set to the corresponding
states.
The MAX349/MAX350 three-wire serial interface is
compatible with SPI, QSPI, and MICROWIRE standards.
If interfacing with a Motorola processor serial interface,
set CPOL = 0. The MAX349/MAX350 are considered to
be slave devices (Figures 2 and 3). At power-up, the
shift register contains all zeros, and all switches are off.
The latch that drives the analog switch is updated on
the rising edge of CS, regardless of SCLK’s state. This
meets all SPI and QSPI requirements.
Daisy-Chaining
For a simple interface using several MAX349s and
MAX350s, “daisy-chain” the shift registers as shown in
Figure 5. The CS pins of all devices are connected,
14
and a stream of data is shifted through the MAX349s or
MAX350s in series. When CS is brought high, all
switches are updated simultaneously. Additional shift
registers may be included anywhere in series with the
MAX349/MAX350 data chain. Note that the DOUT high
level is V+, which may not be compatible with
TTL/CMOS devices if V+ differs from the logic supply
for these other devices.
Addressable Serial Interface
When several serial devices are configured as slaves,
addressable by the processor, DIN pins of each
decode logic individually control CS of each slave
device. When a slave is selected, its CS pin is driven
low, data is shifted in, and CS is driven high to latch the
data. Typically, only one slave is addressed at a time.
DOUT is not used.
Applications Information
8x1 Multiplexer
The MAX349 can be programmed normally, with only
one channel selected for every eight clock pulses, or it
can be programmed in a fast mode, where channel
changing occurs on each clock pulse.
In fast mode, select the channels by sending a single high
pulse (corresponding to the selected channel) at DIN, and
a corresponding CS low pulse for every eight clock pulses. As SCLK clocks this through the register, each switch
sequences one channel at a time, starting with channel 0.
SWITCHES UPDATED
CS
SCLK
DATA CLOCKED IN
DIN
D7
D6 D5 D4 D3 D2 D1 D0
LSB
MSB
INPUT DATA BITS
DATA CLOCKED OUT
DOUT
D7
D6 D5 D4 D3 D2 D1 D0
DATA BITS FROM PREVIOUS DATA INPUT
DOUT POWER-UP DEFAULT: D7–D0 = 0
Figure 2. 3-Wire Interface Timing
______________________________________________________________________________________
D7
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
DATA BITS
RESET
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D7
D6
D5
D4
D3
D2
D1
D0
X
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
MAX349 FUNCTION
All switches open, D7–D0 = 0
All switches open, D7–D0 = 0
All switches closed to COM, D7–D0 = 1
Switch 7 open (off)
Switch 7 closed to COM
Switch 6 open (off)
Switch 6 closed to COM
Switch 5 open (off)
Switch 5 closed to COM
Switch 4 open (off)
Switch 4 closed to COM
Switch 3 open (off)
Switch 3 closed to COM
Switch 2 open (off)
Switch 2 closed to COM
Switch 1 open (off)
Switch 1 closed to COM
Switch 0 open (off)
Switch 0 closed to COM
Table 2. MAX350 Serial-Interface Switch Programming
DATA BITS
RESET
MAX350 FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
1
X
0
X
0
X
0
X
0
X
0
X
0
X
0
X
0
All switches open, D7–D0 = 0
All switches open, D7–D0 = 0
1
1
1
1
1
1
1
1
1
All “A” switches closed to COMA; All “B”
switches closed to COMB, D7–D0 = 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
Switch NO0B open (off)
Switch NO0B closed
Switch NO1B open (off)
Switch NO1B closed
Switch NO2B open (off)
Switch NO2B closed
Switch NO3B open (off)
Switch NO3B closed
Switch NO3A open (off)
Switch NO3A closed
Switch NO2A open (off)
Switch NO2A closed
Switch NO1A open (off)
Switch NO1A closed
Switch NO0A open (off)
Switch NO0A closed
X = Don’t care. Data bit D7 is first bit in; data bit D0 is last in.
______________________________________________________________________________________
15
MAX349/MAX350
Table 1. MAX349 Serial-Interface Switch Programming
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
Dual, Differential 4-Channel Multiplexer
The MAX350 can be programmed normally, with only
one differential channel selected for every eight clock
pulses, or it can be programmed in a fast mode, where
channel changing occurs on each clock pulse.
In fast mode, select the channels by sending two high
pulses, spaced four clock pulses apart (corresponding
to the two selected channels) at DIN, and a corresponding CS low pulse for each of the first eight clock
pulses. As SCLK clocks this through the register, each
switch sequences one differential channel at a time,
starting with channel 0. Repeat this process for subse-
SCLK
SK
MAX349 DIN
MAX350
SO
DOUT
SI
quent channel sequencing after the first eight bits have
been sent. For even faster channel sequencing, send
only one DIN high pulse and one CS low pulse for
every four clock pulses.
Reset Function
RESET is the internal reset pin. It is usually connected
to a logic signal or V+. Drive RESET low to open all
switches and set the contents of the internal shift register to zero simultaneously. When RESET is high, the
part functions normally and DOUT is sourced from V+.
RESET must not be driven beyond V+ or GND.
MICROWIRE
PORT
DOUT
MISO
MAX349 DIN
MAX350
MOSI
SCLK
I/O
CS
CS
SPI
PORT
SCK
I/O
CPOL = 0, CPHA = 0
THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES.
THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES.
Figure 3. Connections for MICROWIRE
SCLK
SCLK
Figure 4. Connections for SPI and QSPI
SCLK
MAX349
SCLK
MAX349
MAX349
DIN
DIN MAX350 DOUT
DIN MAX350 DOUT
DIN MAX350 DOUT
CS
CS
CS
CS
TO OTHER
SERIAL DEVICES
Figure 5. Daisy-Chained Connection
16
______________________________________________________________________________________
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
MAX349/MAX350
DIN
SCLK
CS1
CS2
TO OTHER
SERIAL
DEVICES
CS3
CS
CS
CS
MAX349
MAX349
MAX349
SCLK MAX350
SCLK MAX350
SCLK MAX350
DIN
DIN
DIN
Figure 6. Addressable Serial Interface
D4
D0
SCLK
SW4
SW0
DIN
FOUR CLOCK
PULSES
Figure 7. Differential Multiplexer Input Control
Power-Supply Considerations
Overview
The MAX349/MAX350 construction is typical of most
CMOS analog switches. It has three supply pins: V+, Vand GND. V+ and V- are used to drive the internal
CMOS switches, and they set the limits of the analog
voltage on any switch. Reverse ESD-protection diodes
are internally connected between each analog signal
pin and both V+ and V-. If any analog signal exceeds
V+ or V-, one of these diodes will conduct. During normal
operation, these (and other) reverse-biased ESD diodes
leak, forming the only current drawn from V+ or V-.
Virtually all the analog leakage current is through the
ESD diodes. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V+ or V- and the analog signal. This means their
leakages vary as the signal varies. The difference in the
two diode leakages to the V+ and V- pins constitutes
the analog signal-path leakage current. All analog leakage current flows to the supply terminals, not to the
other switch terminal. This is why both sides of a given
switch can show leakage currents of either the same or
opposite polarity.
There is no connection between the analog signal
paths and GND.
V+ and GND power the internal logic and logic-level
translators, and set both the input and output logic limits. The logic-level translators convert the logic levels to
switched V+ and V- signals to drive the analog signal
gates. This drive signal is the only connection between
the logic supplies (and signals) and the analog supplies. V+ and V- have ESD-protection diodes to GND.
The logic-level inputs and output have ESD protection
to V+ and to GND.
The logic-level thresholds are CMOS and TTL compatible when V+ is +5V. As V+ rises, the threshold increases
slightly. Therefore, when V+ reaches +12V, the threshold
is about 3.1V; above the TTL-guaranteed high-level minimum of 2.8V, but still compatible with CMOS outputs.
______________________________________________________________________________________
17
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
Bipolar Supplies
The MAX349/MAX350 operate with bipolar supplies
from ±3.0V and ±8V. The V+ and V- supplies need not
be symmetrical, but their sum cannot exceed the
absolute maximum rating of 17V. Do not connect the
MAX349/MAX350 V+ to +3V and connect the logiclevel pins to TTL logic-level signals. This exceeds
the absolute maximum ratings and can damage the
part and/or external circuits.
Single Supply
The MAX349/MAX350 operate from single supplies
between +3V and +16V when V- is connected to GND.
All of the bipolar precautions must be observed.
High-Frequency Performance
In 50Ω systems, signal response is reasonably flat up
to 50MHz (see Typical Operating Characteristics) .
Above 20MHz, the on response has several minor
peaks that are highly layout dependent. The problem is
not turning the switch on, but turning it off. The off-state
switch acts like a capacitor and passes higher frequencies with less attenuation. At 10MHz, off-isolation is
about -45dB in 50Ω systems, becoming worse (approximately 20dB per decade) as frequency increases.
Higher circuit impedances also make off-isolation
worse. Adjacent channel attenuation is about 3dB
above that of a bare IC socket, and is entirely due to
capacitive coupling.
Pin Configurations/Functional Diagrams (continued)
TOP VIEW
SCLK 1
MAX349
V+ 2
20 CS
19 RESET
DIN 3
LOGIC
18 DOUT
SCLK 1
MAX350
V+ 2
DIN 3
20 CS
19 RESET
LOGIC
18 DOUT
GND 4
17 V-
COM 5
16 N.C.
COMA 5
16 N.C.
NO0 6
15 N.C.
NO0A 6
15 COMB
NO1 7
14 NO7
NO1A 7
14 NO0B
NO2 8
13 NO6
NO2A 8
13 NO1B
NO3 9
12 NO5
NO3A 9
12 NO2B
N.C. 10
11 NO4
N.C. 10
11 NO3B
SSOP
GND 4
17 V-
SSOP
N.C. = NOT INTERNALLY CONNECTED
18
______________________________________________________________________________________
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
PART
TEMP. RANGE
_________________Chip Topographies
MAX349
PIN-PACKAGE
V+
MAX349EPN
MAX349EWN
MAX349EAP
MAX349MJN
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
18 Plastic DIP
18 Wide SO
20 SSOP
18 CERDIP**
MAX350CPN
MAX350CWN
MAX350CAP
0°C to +70°C
0°C to +70°C
0°C to +70°C
18 Plastic DIP
18 Wide SO
20 SSOP
MAX350C/D
MAX350EPN
MAX350EWN
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
Dice*
18 Plastic DIP
18 Wide SO
NO0
MAX350EAP
MAX350MJN
-40°C to +85°C
-55°C to +125°C
20 SSOP
18 CERDIP**
NO1
DIN
SCLK
CS
RESET DOUT
V-
GND
COM
NO7
0.120"
(3.05mm)
NO6
* Contact factory for dice specifications.
** Contact factory for availability.
NO2
NO4
NO3
NO5
0.100"
(2.54mm)
MAX350
V+
DIN
SCLK
CS
RESET DOUT
VGND
COMA
COMB
NO0A
NO0B
0.120"
(3.05mm)
NO1A
NO1B
NO2A
NO3A
NO3B
NO2B
0.100"
(2.54mm)
TRANSISTOR COUNT: 500
SUBSTRATE CONNECTED TO V+.
______________________________________________________________________________________
19
MAX349/MAX350
Ordering Information (continued)
SSOP.EPS
________________________________________________________Package Information
SOICW.EPS
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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